diff --git a/.github/scripts/architecture/nebula-packages.test.mts b/.github/scripts/architecture/nebula-packages.test.mts
index 32068a31157..ede179ddf7c 100644
--- a/.github/scripts/architecture/nebula-packages.test.mts
+++ b/.github/scripts/architecture/nebula-packages.test.mts
@@ -39,7 +39,7 @@ test('actual illegal imports, missing exports and line overflows fail the packag
     assert.ok(checkNebulaBoundaries(root).some(error => error.includes('relative import leaves package')));
     write(source, '\n'.repeat(601));
     assert.ok(checkNebulaBoundaries(root).some(error => error.includes('exceeds 600')));
-    write(source, "const source = 'src/objects/m42/source/config.json';\n");
+    write(source, "const source = 'src/objects/m42-volume/source/config.json';\n");
     assert.ok(checkNebulaBoundaries(root).some(error => error.includes('object/source path')));
     write(source, 'const load = (name: string) => import(name);\n');
     assert.ok(checkNebulaBoundaries(root).some(error => error.includes('unchecked boundary')));
@@ -64,7 +64,7 @@ test('the main volume entry keeps volume-core\'s platform ban and never reaches
     assert.ok(check(node, `import '${bakeVolumeEntries.main}';`).some(error => error.includes('bake topic imports a bake entry')));
     assert.ok(check(node, "import '@cssearth/nebula-lab/cli';").some(error => error.includes('forbidden import lab')));
     assert.ok(check(node, "import 'undeclared-library';").some(error => error.includes('undeclared external dependency undeclared-library')));
-    assert.ok(check(node, "const source = 'src/objects/m42/source/config.json';").some(error => error.includes('object/source path')));
+    assert.ok(check(node, "const source = 'src/objects/m42-volume/source/config.json';").some(error => error.includes('object/source path')));
     assert.ok(check(node, 'const load = (name: string) => import(name);').some(error => error.includes('unchecked boundary')));
     assert.ok(check(main, '\n'.repeat(601)).some(error => error.includes('exceeds 600')));
     write('packages/bake/package.json', JSON.stringify({ name: bakePackage, private: true, exports: { './volume': './dist/volume.js' } }));
diff --git a/.github/scripts/ci/prepare-ci-inputs.test.mts b/.github/scripts/ci/prepare-ci-inputs.test.mts
index a8df1cd1e8a..2d35035aaac 100644
--- a/.github/scripts/ci/prepare-ci-inputs.test.mts
+++ b/.github/scripts/ci/prepare-ci-inputs.test.mts
@@ -39,7 +39,7 @@ async function fixture(t: { after: (cleanup: () => Promise<unknown>) => void })
   await inventory('milky-way', 'prepared', ['volume.json', 'slices/z/one.webp']);
   await inventory('helix', 'prepared', ['datasets.json', 'slice.webp', 'presentation.json']);
   await inventory('helix', 'runtime', ['unrelated-preview.webp']);
-  await json('src/objects/helix/source/presentation.json', { schema: 'cssearth-volume-presentation-source@2', objectId: 'helix' });
+  await json('src/objects/helix-volume/source/presentation.json', { schema: 'cssearth-volume-presentation-source@2', objectId: 'helix' });
   await inventory('local-group', 'runtime', ['catalogue.json'], 'prepared');
   await json('src/objects/local-group/source/presentation.json', { provenance: { products: [] } });
   const fetcher: typeof fetch = async url => {
diff --git a/.gitignore b/.gitignore
index 0de63e64628..f693ff592ee 100644
--- a/.gitignore
+++ b/.gitignore
@@ -26,8 +26,8 @@ output/playwright/
 # Reacquirable binary source inputs. Source manifests, hashes, provenance,
 # licenses, configuration, and authored source modules remain tracked.
 src/objects/*/source/**/*.csv
-# LGGS M31 star table (12.5 MB); restored from its CDS origin (src/objects/m31/source/lggs-stars/points.json).
-src/objects/m31/source/lggs-stars/table4.dat.gz
+# LGGS M31 star table (12.5 MB); restored from its CDS origin (src/objects/m31-layers/source/lggs-stars/points.json).
+src/objects/m31-layers/source/lggs-stars/table4.dat.gz
 # Earth's dated NASA MUR tile archives (45 MB a day); restored from the source mirror (src/objects/earth/source/manifest.json).
 src/objects/earth/source/science/mur/*/tiles.tar.gz
 src/objects/*/source/**/*.fits
@@ -69,10 +69,10 @@ src/objects/venus/source/akatsuki/*.nc
 !src/objects/mercury/source/features/tectonic/global-tectonic-map.zip
 
 # Offline-authored galaxy overview crops with no acquisition plan to restore them.
-!src/objects/lmc/source/source.jpg
-!src/objects/m31/source/source.jpg
-!src/objects/m33/source/source.jpg
-!src/objects/smc/source/source.jpg
+!src/objects/lmc-volume/source/source.jpg
+!src/objects/m31-layers/source/source.jpg
+!src/objects/m33-layers/source/source.jpg
+!src/objects/smc-volume/source/source.jpg
 !src/objects/milky-way/source/sky/nasa-preview.jpg
 
 # Retained upstream catalogue bytes with no acquisition plan to restore them.
@@ -207,12 +207,12 @@ src/objects/*/source/**/*.bpc
 !src/objects/*/source/science/geology-*/Screenshot *.png
 
 # SMC compact replay inputs: small PNGs prepare:nebulae needs to rebuild the dataset bank and the neutral emission volume.
-!src/objects/smc/source/compact/lenses/*/*.png
-!src/objects/smc/source/compact/neutral/slices/*/*.png
+!src/objects/smc-volume/source/compact/lenses/*/*.png
+!src/objects/smc-volume/source/compact/neutral/slices/*/*.png
 # LMC compact replay inputs, the same shape plus the model projection its dataset tone curves read.
-!src/objects/lmc/source/compact/lenses/*/*.png
-!src/objects/lmc/source/compact/neutral/slices/*/*.png
-!src/objects/lmc/source/compact/fit-projection.png
+!src/objects/lmc-volume/source/compact/lenses/*/*.png
+!src/objects/lmc-volume/source/compact/neutral/slices/*/*.png
+!src/objects/lmc-volume/source/compact/fit-projection.png
 
 # USGS Gazetteer nomenclature archives re-pinned this phase: named explicitly (not a glob) so tracking stays limited
 # to the bodies actually verified here; each manifest documents these as a committed public-domain snapshot.
@@ -314,15 +314,15 @@ src/objects/*/source/**/*.bpc
 /src/objects/eps-eridani-disc/.prepared-*/
 /src/objects/hd-181327-disc/.prepared-*/
 /src/objects/pds-70-disc/.prepared-*/
-/src/objects/m42/.prepared-*/
-/src/objects/helix/.prepared-*/
-/src/objects/m2-9/.prepared-*/
-/src/objects/m1/.prepared-*/
-/src/objects/smc/.prepared-*/
-/src/objects/lmc/.prepared-*/
-/src/objects/m45/.prepared-*/
-/src/objects/m8/.prepared-*/
-/src/objects/omega-centauri/.prepared-*/
+/src/objects/m42-volume/.prepared-*/
+/src/objects/helix-volume/.prepared-*/
+/src/objects/m2-9-volume/.prepared-*/
+/src/objects/m1-volume/.prepared-*/
+/src/objects/smc-volume/.prepared-*/
+/src/objects/lmc-volume/.prepared-*/
+/src/objects/m45-volume/.prepared-*/
+/src/objects/m8-volume/.prepared-*/
+/src/objects/omega-centauri-volume/.prepared-*/
 # SPICE kernels are restored from their origins, never committed: bank kernels by packages/bake/cli/kernel-bank.mts,
 # body kernels by their acquisition steps (packages/bake/cli/restore-source-inputs.mts), evidence kernels by the script
 # that reads them.
diff --git a/data/chandra/ledger.json b/data/chandra/ledger.json
index d56efa8ddd1..90258945c92 100644
--- a/data/chandra/ledger.json
+++ b/data/chandra/ledger.json
@@ -482,7 +482,7 @@
         "raDeg": 337.4107083333334,
         "decDeg": -20.83717222222222
       },
-      "source": "src/objects/helix/source/nebula.json",
+      "source": "src/objects/helix-volume/source/nebula.json",
       "observations": 2,
       "totalExposureKs": 47.7,
       "longest": [
@@ -565,7 +565,7 @@
         "raDeg": 83.6334511837,
         "decDeg": 22.0151236394
       },
-      "source": "src/objects/m1/source/nebula.json",
+      "source": "src/objects/m1-volume/source/nebula.json",
       "observations": 102,
       "totalExposureKs": 688.8,
       "longest": [
@@ -601,7 +601,7 @@
         "raDeg": 256.407962101,
         "decDeg": -10.1425459988
       },
-      "source": "src/objects/m2-9/source/nebula.json",
+      "source": "src/objects/m2-9-volume/source/nebula.json",
       "observations": 1,
       "totalExposureKs": 19.6,
       "longest": [
@@ -693,7 +693,7 @@
         "raDeg": 83.78715182853901,
         "decDeg": -5.400382551151912
       },
-      "source": "src/objects/m42/source/nebula.json",
+      "source": "src/objects/m42-volume/source/nebula.json",
       "observations": 111,
       "totalExposureKs": 3736.5,
       "longest": [
@@ -729,7 +729,7 @@
         "raDeg": 56.75,
         "decDeg": 24.1167
       },
-      "source": "src/objects/m45/source/nebula.json",
+      "source": "src/objects/m45-volume/source/nebula.json",
       "observations": 6,
       "totalExposureKs": 254.9,
       "longest": [
@@ -765,7 +765,7 @@
         "raDeg": 270.76531645904527,
         "decDeg": -24.30622861770443
       },
-      "source": "src/objects/m8/source/nebula.json",
+      "source": "src/objects/m8-volume/source/nebula.json",
       "observations": 5,
       "totalExposureKs": 318.2,
       "longest": [
diff --git a/docs/flight-lifecycle.md b/docs/flight-lifecycle.md
index ef18dd56175..4d0fc008799 100644
--- a/docs/flight-lifecycle.md
+++ b/docs/flight-lifecycle.md
@@ -21,7 +21,7 @@ runtime forwards them without remeasuring the camera DOM. Application navigation
 owns history restoration; each detail only writes its current saved view.
 
 `createCameraFlight` owns scheduling, acceleration, cancellation and completion
-for world navigation, prepared-focus flights and native surface fly-to. Each
+for world navigation and native surface fly-to. Each
 path supplies its existing camera sampling math. World navigation retains one
 document wheel listener for the navigation owner's lifetime and switches only
 its active callback. Adding or removing a nonpassive document wheel listener at
@@ -235,10 +235,7 @@ A newly mounted world receives the latest settings. Playback permission remains
 governed by the shared runtime policy.
 
 `site/scene/scene-selection.mts` owns the committed subject and projects its URL.
-Prepared-focus navigation owns the acquired target and executes camera/dataset
-commands. It publishes one result to the selection owner, including whether a
-saved camera must be discarded. It neither mirrors the selected ID nor formats
-another selection URL. Native camera focus remains the geometric pivot.
+Every subject is an object's scene; the geometric pivot is that object's centre.
 
 ## Scene activation and prepared ownership
 
diff --git a/docs/galaxies/README.md b/docs/galaxies/README.md
index 7678ef3cc89..7d8ffd6d03b 100644
--- a/docs/galaxies/README.md
+++ b/docs/galaxies/README.md
@@ -25,7 +25,7 @@ The [source recipe](../../labs/nebula/models/image-candidates.json) retains the
 | Point stars | [Bonanos et al. (2009)](https://arxiv.org/abs/0905.1328), [CDS J/AJ/138/1003](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1003) | 943 stars with measured sky positions and photometry. Depths are assigned from the density. All three datasets use identical positions. |
 | Surface color | The three registered observations above | Native star removal, then color sampling onto the fixed density. Uncovered density keeps neutral color. |
 
-The [accepted bake recipe](../../labs/nebula/models/lmc/bake.json) pins image placement and color settings; the [app settings](../../src/objects/lmc/README.md#evidence) retain cloud and star display. Switching datasets changes the material while retaining the cloud, stars and camera.
+The [accepted bake recipe](../../labs/nebula/models/lmc/bake.json) pins image placement and color settings; the [app settings](../../src/objects/lmc-volume/README.md#evidence) retain cloud and star display. Switching datasets changes the material while retaining the cloud, stars and camera.
 
 ## Extragalactic datasets
 
@@ -44,9 +44,9 @@ The [accepted bake recipe](../../labs/nebula/models/lmc/bake.json) pins image pl
 | --- | --- | --- |
 | Milky Way exterior | [OpenSpace/AMNH/NAOJ volume](https://docs.openspaceproject.com/latest/content/milky-way/galaxy/milky-way-volume/index.html) | 1,024 × 1,024 × 128 RGBA model, baked into its bulge and inner disc only. Simulation-based visualization. [Provenance](../../src/objects/milky-way/source/provenance.json). |
 | Milky Way interior | [NASA SVS, Deep Star Maps 2020](https://svs.gsfc.nasa.gov/4851/) | 8,192 × 4,096 Milky Way-only map derived from star catalogues; the panorama shell adds authored visual depth. Credits: NASA/Goddard SVS, Ernie Wright (USRA), ESA/Gaia/DPAC. [Provenance](../../src/objects/milky-way/source/sky/provenance.json). |
-| M31 | [ESA/Hubble & Digitized Sky Survey 2, heic1112f](https://esahubble.org/images/heic1112f/) | 4,783 × 5,000 crop/resample; 1 kpc parametric depth. Acknowledgment: Davide De Martin (ESA/Hubble). [Provenance](../../src/objects/m31/source/provenance.json). |
-| M33 | [ESO VST/OmegaCAM, eso1424a](https://www.eso.org/public/images/eso1424a/) | 4,000 × 3,355, g/r/Hα; 1.2 kpc parametric envelope. Excludes the larger H I outskirts. [Provenance](../../src/objects/m33/source/provenance.json). |
-| SMC | [SMASH/NOIRLab, noirlab2030b](https://noirlab.edu/public/images/noirlab2030b/) | 3,000 × 2,501, g/r/i/z; authored 25 kpc envelope. Excludes the full Bridge, Wing and tidal debris. [Full credit and provenance](../../src/objects/smc/source/provenance.json). |
+| M31 | [ESA/Hubble & Digitized Sky Survey 2, heic1112f](https://esahubble.org/images/heic1112f/) | 4,783 × 5,000 crop/resample; 1 kpc parametric depth. Acknowledgment: Davide De Martin (ESA/Hubble). [Provenance](../../src/objects/m31-layers/source/provenance.json). |
+| M33 | [ESO VST/OmegaCAM, eso1424a](https://www.eso.org/public/images/eso1424a/) | 4,000 × 3,355, g/r/Hα; 1.2 kpc parametric envelope. Excludes the larger H I outskirts. [Provenance](../../src/objects/m33-layers/source/provenance.json). |
+| SMC | [SMASH/NOIRLab, noirlab2030b](https://noirlab.edu/public/images/noirlab2030b/) | 3,000 × 2,501, g/r/i/z; authored 25 kpc envelope. Excludes the full Bridge, Wing and tidal debris. [Full credit and provenance](../../src/objects/smc-volume/source/provenance.json). |
 
 The Milky Way overview enables the galaxy's prepared depth layers; other destinations keep its distant views. M31, M33 and the SMC use image-derived parametric layers, not the LMC's star-removal and density-coloring pipeline.
 
diff --git a/docs/navigation-identity.md b/docs/navigation-identity.md
index 358206b62c9..91004a5148b 100644
--- a/docs/navigation-identity.md
+++ b/docs/navigation-identity.md
@@ -6,34 +6,37 @@ nebula catalogues. Search, aliases and classification tabs use this inventory.
 
 | Concept | Meaning and owner |
 | --- | --- |
-| Scene destination | A body package with a route, prepared world frame and scene loader. |
-| Prepared-focus destination | A catalogue subject the map can open: a galaxy cluster, or a subject an object package details. Its page, `/<id>/`, is its host scene’s page with the subject selected; `?dataset=` selects its dataset, as on every page. Other catalogue rows are labels with no page. |
-| Overview | The Milky Way, the Local Group, the Nearby and the Observable Universe: registry entries of kind `overview`, authored under `properties.overview` in their packages: name, description, order, the zoom thresholds and framing of their level, the classifications they hold and the packages they draw. The zoom ladder, the cards, the breadcrumbs and the sidebar tree's sections are built from these entries. Its page, `/<id>/`, is the world host's scene page with the overview selected. |
+| Object | A package with a catalogue entry: a route, a prepared world frame and a scene loader. A planet, a star, a galaxy, a nebula and a cluster of galaxies are all this. `?dataset=` selects one of its datasets. |
+| Level | The Milky Way, the Local Group, the Nearby and the Observable Universe: views of a scene on the zoom ladder, not objects, authored under `properties.overview` in their packages (name, description, order, zoom thresholds, what they hold). A level's page, `/<id>/`, is the world host's scene at that zoom. |
 | Rendering resource | A volume, image bank, point field or other prepared content. A resource descriptor alone does not publish a destination. |
 | Dataset view | A selectable `(objectId, datasetId)` presentation, which may combine several products and published sources. |
 | Published source | A scientific work, release or product identified in the source catalogue; a local file hash identifies retained bytes separately. |
 
-Every page is `/<id>/`, one URL system for all three kinds of page:
+Every page is `/<id>/`, one URL system for every object:
 [`navigation-scope.mts`](../site/navigation/navigation-scope.mts) reads and
-writes them. A scene's page mounts that scene. A catalogue subject or an overview
-is drawn by a mounted scene: opened cold, its page mounts the world host, the Sun,
-which every catalogue subject and overview is placed from. In place, a catalogue
-subject keeps the mounted scene; an overview is always the host's, as zooming out
-of any system reaches it. Their pages carry none of the scene's own selections
-(`dataset`, `feature`), so a cold open never reads them as the host's.
-
-`SCENE_OBJECTS` filters `OBJECTS` by scene capability. Routes, body preparation
-and scene conformance use this filter because a prepared focus does not own
-another scene. `requireObject` resolves either destination kind;
-`requireSceneObject` rejects a focus when a caller needs a scene loader.
-
-One object has one id. A catalogue row that an object package details takes the
-package's id when the catalogue is prepared: Andromeda is `m31` in the catalogue,
-the registry, its page and its links, and the LVDB key `m_031` stays in its source
-references. Non-navigable context resources remain outside `OBJECTS`.
+writes them. Every object has a scene of its own, and its page mounts it. A level
+of the zoom ladder (the Milky Way, the Local Group, the nearby and the observable
+universe) is not an object: it is a view of a scene, reached by zooming out of any
+system. Its page, opened cold, mounts the world host, the Sun, at that zoom. A
+level's page carries none of the scene's own selections (`dataset`, `feature`), so
+a cold open never reads them as the host's.
+
+`OBJECTS` has one entry shape and no kinds. Each entry is built from its package's
+own descriptor: a catalogue block, a world frame and a scene. A galaxy, a nebula
+and a cluster of galaxies are objects like any body; their recipe declares no
+surface, and their imagery is a context bank a dataset names. `SCENE_OBJECTS` is
+the same list. The levels are a separate short list (`OVERVIEWS`), each authored
+under its package's `properties.overview`. The Local Group is a level with a
+place of its own, so the world context also draws and names it.
+
+One object has one id. The spatial catalogues (Local Group galaxies, galaxy
+clusters, the nearby field) are data the world draws as dots: a row makes no page
+and no registry entry, and nothing in the application reads a row for an object's
+identity, position or facts. Non-navigable context resources remain outside
+`OBJECTS`.
 Adding a classification does not add a renderer, shell or camera owner.
 
-`sceneHostId` identifies the scene displaying a prepared focus. A galaxy's
+A catalogue galaxy's
 `hostId` identifies its physical host. Referenced hosts excluded from positional
 selection remain in the catalogue's `unpositionedHosts`, with a source reference
 and exclusion reason. They acquire no position or destination. The reader rejects
@@ -157,6 +160,6 @@ owners. Its test preload rejects accidental use of application boot; it does
 not prove the Vite-generated context inventory or browser startup.
 
 Scene conformance remains derived from the scene capability filter. Run
-`pnpm test:site` (the browser suites were retired; scene retention is checked in `site/test/scene-session.test.mts`) to check prepared-focus search, selection, saved links and retained
+`pnpm test:site` (the browser suites were retired; scene retention is checked in `site/test/scene-session.test.mts`) to check search, selection, saved links and retained
 camera ownership. These checks do not establish the scientific accuracy of a
 catalogue measurement or a reconstructed volume.
diff --git a/docs/nebulae/README.md b/docs/nebulae/README.md
index bae61f83beb..030944dff65 100644
--- a/docs/nebulae/README.md
+++ b/docs/nebulae/README.md
@@ -4,13 +4,13 @@ M42, Helix, M2–9, Pleiades, Crab and Lagoon use the retained `volume-dataset-b
 
 | Object | Method | Datasets | Adopted distance |
 | --- | --- | --- | --- |
-| [M42](../../src/objects/m42/README.md) | Image emission with an evidence-guided coherent depth surface | ESO optical and VISTA infrared | 414 ± 7 pc |
-| [Helix](../../src/objects/helix/README.md) | Multi-image emission with a molecular velocity scaffold | ESO WFI optical, VISTA infrared, wide optical | 216 −12/+14 pc |
-| [M2–9](../../src/objects/m2-9/README.md) | Axially symmetric image-conditioned emission | Hubble optical | 650 pc, uncertain |
-| [Pleiades · M45](../../src/objects/m45/README.md) | Authored finite dust-display surface and observed stellar catalogue | NOIRLab + Niittee optical composite, NOIRLab optical, two Spitzer composites, WISE | 136.2 ± 1.2 pc |
-| [Crab · M1](../../src/objects/m1/README.md) | Released SITELLE ejecta samples with conditional expansion depth and separate pulsar-wind components | Hubble, two Webb views, Spitzer, VLA, Chandra | 2,000 pc adopted model scale |
-| [Lagoon · M8](../../src/objects/m8/README.md) | Authored coherent front with local published structure constraints | ESO optical, VISTA infrared, Spitzer infrared | 1,326 −69/+77 pc |
-| [LMC](../../src/objects/lmc/README.md) | Registered image colors on a simulated stellar-density prior | VISTA infrared, Horálek visible light, WISE infrared | The Local Group catalogue owns its distance |
+| [M42](../../src/objects/m42-volume/README.md) | Image emission with an evidence-guided coherent depth surface | ESO optical and VISTA infrared | 414 ± 7 pc |
+| [Helix](../../src/objects/helix-volume/README.md) | Multi-image emission with a molecular velocity scaffold | ESO WFI optical, VISTA infrared, wide optical | 216 −12/+14 pc |
+| [M2–9](../../src/objects/m2-9-volume/README.md) | Axially symmetric image-conditioned emission | Hubble optical | 650 pc, uncertain |
+| [Pleiades · M45](../../src/objects/m45-volume/README.md) | Authored finite dust-display surface and observed stellar catalogue | NOIRLab + Niittee optical composite, NOIRLab optical, two Spitzer composites, WISE | 136.2 ± 1.2 pc |
+| [Crab · M1](../../src/objects/m1-volume/README.md) | Released SITELLE ejecta samples with conditional expansion depth and separate pulsar-wind components | Hubble, two Webb views, Spitzer, VLA, Chandra | 2,000 pc adopted model scale |
+| [Lagoon · M8](../../src/objects/m8-volume/README.md) | Authored coherent front with local published structure constraints | ESO optical, VISTA infrared, Spitzer infrared | 1,326 −69/+77 pc |
+| [LMC](../../src/objects/lmc-volume/README.md) | Registered image colors on a simulated stellar-density prior | VISTA infrared, Horálek visible light, WISE infrared | The Local Group catalogue owns its distance |
 
 These are relative display emission models, not measured 3D gas density. The six Galactic nebulae use [surrounding Gaia/Bailer-Jones stellar fields](stellar-fields.md), independent of source-image boundaries. Each body README distinguishes its model limits from app integration.
 
diff --git a/docs/page-navigation-transport.md b/docs/page-navigation-transport.md
index 62b9e0cae14..0d20695baed 100644
--- a/docs/page-navigation-transport.md
+++ b/docs/page-navigation-transport.md
@@ -77,7 +77,7 @@ GET form; sky contrast follows its checkbox directly in CSS. Dataset attribution
 cards are already present, and CSS owns their placement and visibility. Startup
 preserves open settings, early selections and these same elements.
 
-The response can restore a saved camera URL and select a prepared focus volume.
+The response can restore a saved camera URL and select a dataset that shows a companion bank.
 JavaScript adds camera input, animation, live filtering, dataset changes in place
 and continuing world navigation. The separate [native camera experiment](native-resize-input.md)
 explores scroll zoom and resize rotation; it is not enabled in the normal site.
@@ -109,18 +109,18 @@ renderer intercepts those buttons and updates the retained scene in place.
 Startup adopts the dataset rendered by the server as its first selection,
 without publishing the default dataset first.
 
-A catalogue focus has its own page, such as Orion's `/m42/`: its host scene's page
-with the focus selected. Its dataset buttons submit `dataset`, as on every page;
-the response selects the authenticated bank inside the existing scene and fills
-the shared focus card. The deploy build renders each focus page through the same
-function once (`site/build/prerender-focus-pages.mts`), so the static page opens
-on its card with or without JavaScript. Catalogue transport is separate pinned JSON, shared by the response and
+A galaxy, cluster or nebula with a package is an ordinary object: `/m42/` is its own
+scene's page, with its card and dataset buttons as on every page. A level of the zoom
+ladder has no scene of its own; its page is the world host's page framed on it, and the
+deploy build renders each level page through the search function once
+(`site/build/prerender-level-pages.mts`), so the static page opens on its card with or
+without JavaScript. Catalogue transport is separate pinned JSON, shared by the response and
 browser. Construction-order identities let the live volume publisher adopt
 the response's elements and selected dataset. Responsive CSS lengths retain the
-prepared camera's projection until the browser resolves its viewport. A flight
-to a prepared focus arrives on the line of sight from the Sun with celestial
-north up, as its datasets were observed, whichever way the previous view faced;
-a saved camera URL that still shows the focus keeps its own pose. Before this
+prepared camera's projection until the browser resolves its viewport. A galaxy,
+nebula or cluster opens on the line of sight from the Sun, as its datasets were
+observed: its default camera is derived like a placed star's (default-camera.ts).
+A saved camera URL keeps its own pose. Before this
 rule, [the Crab reached from Pluto](images/crab-focus-arrival.png) was seen from
 behind, with the Sun and other foreground markers across it.
 
diff --git a/docs/seo.md b/docs/seo.md
index d6c00326171..b6554abd797 100644
--- a/docs/seo.md
+++ b/docs/seo.md
@@ -23,7 +23,7 @@ application controls hidden. Every other scene page uses its arrival billboard:
 `site/build/share-images.mts` runs in `pnpm build:deploy` after `astro build`. It
 centres each billboard on black at 1200×630 and writes `dist/social/<id>.jpg`
 (about 3,570 cards, 24 MB). A billboard it cannot read fails the deploy. Pages
-with neither, such as catalogue focus pages, fall back to the Earth capture.
+with neither, such as the pages of galaxies and nebulae, fall back to the Earth capture.
 None of these images adds requests to ordinary page loads.
 
 ![Share images drawn from the arrival billboards of Betelgeuse, WASP-43 b, Phobos and Comet 67P](images/share-cards.webp)
diff --git a/docs/sidebar-thumbnails.md b/docs/sidebar-thumbnails.md
index 3e1754f0527..7ed224c6bac 100644
--- a/docs/sidebar-thumbnails.md
+++ b/docs/sidebar-thumbnails.md
@@ -1,7 +1,7 @@
 # Sidebar thumbnails
 
 Galaxy and nebula object rows use the default dataset's own image. Dataset rows
-use their selected dataset's image. The prepared focus bank contains 80 px WebPs;
+use their selected dataset's image. The prepared bank of thumbnails contains 80 px WebPs;
 search and overview members display them in the shared 40 px result row. Smaller
 navigation markers display them at 14 or 16 CSS pixels. The sidebar does not download
 a full preview just for an icon.
diff --git a/labs/investigations/capture-galaxies.mts b/labs/investigations/capture-galaxies.mts
index 84072147b81..1c062c047b6 100644
--- a/labs/investigations/capture-galaxies.mts
+++ b/labs/investigations/capture-galaxies.mts
@@ -33,7 +33,7 @@ const receipt = {
   schema: 'cssearth-galaxy-documentation-captures@1',
   viewport: { width: 1440, height: 900 }, deviceScaleFactor: 1,
   capture: 'Actual Chromium app viewport; WebP quality 90, no crop, resize, color or exposure changes.',
-  deliveryManifest: 'src/objects/lmc/source/lens-manifest.json',
+  deliveryManifest: 'src/objects/lmc-volume/source/lens-manifest.json',
   passed: false, images, errors,
 };
 await mkdir(resolve(root, 'docs/images/galaxies'), { recursive: true });
diff --git a/labs/nebula/application-isolation.gate.ts b/labs/nebula/application-isolation.gate.ts
index fdd5c1d33fd..5b004c1639b 100644
--- a/labs/nebula/application-isolation.gate.ts
+++ b/labs/nebula/application-isolation.gate.ts
@@ -33,9 +33,9 @@ for (const path of inputs) {
 }
 // Runtime host fingerprints include validation owners even when esbuild removes type-only imports.
 for (const path of ['packages/renderer/src/volume/types.ts', 'packages/renderer/src/navigation/world-camera-math.ts',
-  'packages/renderer/src/stars/prepared-catalogue-points.ts', 'src/objects/m42/object.json',
-  'src/objects/m42/source', 'src/objects/m2-9/object.json', 'src/objects/m2-9/source',
-  'src/objects/lmc/object.json', 'src/objects/lmc/prepared/datasets.json', 'src/objects/lmc/source', 'src/objects/stellar-neighbourhood/source/stars.json']) {
+  'packages/renderer/src/stars/prepared-catalogue-points.ts', 'src/objects/m42-volume/object.json',
+  'src/objects/m42-volume/source', 'src/objects/m2-9-volume/object.json', 'src/objects/m2-9-volume/source',
+  'src/objects/lmc-volume/object.json', 'src/objects/lmc-volume/prepared/datasets.json', 'src/objects/lmc-volume/source', 'src/objects/stellar-neighbourhood/source/stars.json']) {
   const destination = resolve(sandbox, path); await mkdir(dirname(destination), { recursive: true });
   await cp(resolve(root, path), destination, { recursive: true });
 }
diff --git a/labs/nebula/docs/baking.md b/labs/nebula/docs/baking.md
index d79e09d81f1..2d57807576a 100644
--- a/labs/nebula/docs/baking.md
+++ b/labs/nebula/docs/baking.md
@@ -38,7 +38,7 @@ Success is **`BAKE_COMPLETE lmc` followed by `NEBULA_VERIFIED`**. The verifier c
 
 The bake downloads missing native originals and the pinned NOX model, creates a local Python environment with pinned dependencies, and checks every input is present before processing. Large downloads and intermediate files stay in `.local/`. Allow at least 8 GiB beyond the clone for dependencies, originals and generated products. The measured clean run took **15 minutes** on macOS arm64, including downloads and Python setup; a cached full replay took **4.2 seconds**. Hardware and network speed affect these times. The saved pre-NOX baseline examines about 1.7 million VISTA candidates and dominates the first run. Later runs verify and reuse completed native removal/reconstruction results. Python package installation requires an available wheel for the machine's platform.
 
-The command does not need the browser's localStorage, a running server or previously completed image jobs. A full bake assembles its three-dataset repaint bank under `.local/nebula-lab/bakes/` only: the application LMC now ships the finite-emission model in `models/lmc/envelope/`, restored by `pnpm prepare:nebulae` from `src/objects/lmc/source/compact/`, so this recipe no longer writes into `src/objects/lmc`. It does not restart the lab, change browser settings or publish anything.
+The command does not need the browser's localStorage, a running server or previously completed image jobs. A full bake assembles its three-dataset repaint bank under `.local/nebula-lab/bakes/` only: the application LMC now ships the finite-emission model in `models/lmc/envelope/`, restored by `pnpm prepare:nebulae` from `src/objects/lmc-volume/source/compact/`, so this recipe no longer writes into `src/objects/lmc`. It does not restart the lab, change browser settings or publish anything.
 
 ## Stages and configuration
 
diff --git a/labs/nebula/docs/clean-install-verification.json b/labs/nebula/docs/clean-install-verification.json
index a0d5e7fa169..9a8f066ece1 100644
--- a/labs/nebula/docs/clean-install-verification.json
+++ b/labs/nebula/docs/clean-install-verification.json
@@ -49,7 +49,7 @@
       },
       {
         "case": "corrupt-delivery",
-        "path": "src/objects/lmc/prepared/vista-infrared/slices/z/24.webp",
+        "path": "src/objects/lmc-volume/prepared/vista-infrared/slices/z/24.webp",
         "rejected": true,
         "notRepaired": true
       }
diff --git a/labs/nebula/models/helix/README.md b/labs/nebula/models/helix/README.md
index f046ca56209..ad4ccec7ee1 100644
--- a/labs/nebula/models/helix/README.md
+++ b/labs/nebula/models/helix/README.md
@@ -1,6 +1,6 @@
 # Helix: conditional emission compiler
 
-This lab model studies how to turn Helix Nebula photographs into a 3D emission cloud. The [shipped object record](../../../../src/objects/helix/README.md) owns the active sources, delivery evidence and known problems.
+This lab model studies how to turn Helix Nebula photographs into a 3D emission cloud. The [shipped object record](../../../../src/objects/helix-volume/README.md) owns the active sources, delivery evidence and known problems.
 
 Open `/reconstruction?subject=helix-model-prior&inspection=compiler`. **Nebula → Compile nebula** runs the configured sources through separation, evidence, an optional velocity scaffold, positive multiscale emission fitting and a shared three-dataset bake. The [compiler method and complete setup](../../docs/emission-compiler.md) describe jobs, replay and assumptions. Visual acceptance is still open, and no compiled result is a production nebula asset.
 
diff --git a/labs/nebula/models/lmc/envelope/EMISSION-METHOD.md b/labs/nebula/models/lmc/envelope/EMISSION-METHOD.md
index bdc9f60c3b5..b64cbcd4bbd 100644
--- a/labs/nebula/models/lmc/envelope/EMISSION-METHOD.md
+++ b/labs/nebula/models/lmc/envelope/EMISSION-METHOD.md
@@ -2,7 +2,7 @@
 
 This is a new inferred-emission model for the LMC. It does not repaint the unchanged stellar-density
 volume. Model `lmc-clouds-emission-envelope` and its three datasets are promoted to the application by
-[`app-datasets.json`](app-datasets.json); [the object's README](../../../../../src/objects/lmc/README.md)
+[`app-datasets.json`](app-datasets.json); [the object's README](../../../../../src/objects/lmc-volume/README.md)
 is the delivered account, and the `alignment-density-material-v1` datasets it replaced remain a historical
 reference.
 
diff --git a/labs/nebula/models/lmc/envelope/app-datasets.json b/labs/nebula/models/lmc/envelope/app-datasets.json
index cf92dfd57bd..f64d1de7882 100644
--- a/labs/nebula/models/lmc/envelope/app-datasets.json
+++ b/labs/nebula/models/lmc/envelope/app-datasets.json
@@ -4,8 +4,8 @@
   "defaultDataset": "horalek-widefield",
   "framingRadiusUnits": 5,
   "evidence": {
-    "emissionRecipe": "src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json",
-    "datasetRecipe": "src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json"
+    "emissionRecipe": "src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json",
+    "datasetRecipe": "src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json"
   },
   "datasets": [
     {
diff --git a/labs/nebula/models/m1/README.md b/labs/nebula/models/m1/README.md
index 1ba7f1e8c0e..274d0bab2f6 100644
--- a/labs/nebula/models/m1/README.md
+++ b/labs/nebula/models/m1/README.md
@@ -1,7 +1,7 @@
 # Crab Nebula: measured ejecta and a separate pulsar wind
 
 This lab model holds processing studies for the Crab Nebula. The
-[current shipped object record](../../../../src/objects/m1/README.md) owns
+[current shipped object record](../../../../src/objects/m1-volume/README.md) owns
 the active sources, delivery evidence and known problems. Experiments here do
 not qualify later deliveries.
 
diff --git a/labs/nebula/models/m2-9/README.md b/labs/nebula/models/m2-9/README.md
index dd4ce137d3b..7dd3fd77eed 100644
--- a/labs/nebula/models/m2-9/README.md
+++ b/labs/nebula/models/m2-9/README.md
@@ -1,7 +1,7 @@
 # M2–9: image-to-volume experiment
 
 This file preserves processing studies and their dated results. The
-[current shipped object record](../../../../src/objects/m2-9/README.md) owns
+[current shipped object record](../../../../src/objects/m2-9-volume/README.md) owns
 the active sources, delivery evidence and known problems. Historical experiments
 below do not qualify later deliveries.
 
diff --git a/labs/nebula/models/m42/README.md b/labs/nebula/models/m42/README.md
index abd1b769b18..09c5ee10638 100644
--- a/labs/nebula/models/m42/README.md
+++ b/labs/nebula/models/m42/README.md
@@ -1,6 +1,6 @@
 # Orion · M42
 
-This lab model studies a 3D emission reconstruction of M42, an asymmetric H II region and star-forming nebula. The [shipped object record](../../../../src/objects/m42/README.md) owns the active sources, delivery evidence and known problems.
+This lab model studies a 3D emission reconstruction of M42, an asymmetric H II region and star-forming nebula. The [shipped object record](../../../../src/objects/m42-volume/README.md) owns the active sources, delivery evidence and known problems.
 
 ## Sources
 
diff --git a/labs/nebula/models/m45/README.md b/labs/nebula/models/m45/README.md
index ae214a4f9c4..7ac4a28f96f 100644
--- a/labs/nebula/models/m45/README.md
+++ b/labs/nebula/models/m45/README.md
@@ -1,6 +1,6 @@
 # Pleiades (M45): source evidence and 3D experiment
 
-This file holds processing studies for the Pleiades nebula lab. The [shipped object record](../../../../src/objects/m45/README.md) owns the active sources, delivery evidence and known problems. The experiments below do not qualify later deliveries.
+This file holds processing studies for the Pleiades nebula lab. The [shipped object record](../../../../src/objects/m45-volume/README.md) owns the active sources, delivery evidence and known problems. The experiments below do not qualify later deliveries.
 
 The current result is an experimental display volume, not a recovered dust cloud or an accepted production-quality scene. Reconstruction has an **Optical composite · NOIRLab + Niittee** research dataset: Niittee's registered optical footprint covers 99.84% of the model's projected emission, compared with 60.14% for NOIRLab alone. See the [method, result, credits, rejected trials and replay limits](optical-composite-notes.md).
 
diff --git a/labs/nebula/models/m8/README.md b/labs/nebula/models/m8/README.md
index 7c420871a36..9b7d953e76d 100644
--- a/labs/nebula/models/m8/README.md
+++ b/labs/nebula/models/m8/README.md
@@ -1,6 +1,6 @@
 # Lagoon · M8
 
-This lab holds the processing studies for the Lagoon Nebula, an asymmetric H II region and star-forming nebula. The [current shipped object record](../../../../src/objects/m8/README.md) owns the active sources, delivery evidence and known problems. Results below do not qualify later deliveries.
+This lab holds the processing studies for the Lagoon Nebula, an asymmetric H II region and star-forming nebula. The [current shipped object record](../../../../src/objects/m8-volume/README.md) owns the active sources, delivery evidence and known problems. Results below do not qualify later deliveries.
 
 The selected optical, near-infrared and mid-infrared images have verified native star separation and a shared 3D cloud. The geometry uses a paper-guided local PDR interpretation with explicitly authored depth across the wider field. It is relative display emission, not recovered gas or dust density.
 
diff --git a/labs/nebula/models/m8/alignment-candidates.json b/labs/nebula/models/m8/alignment-candidates.json
index 54069edfb60..7ae93db13b1 100644
--- a/labs/nebula/models/m8/alignment-candidates.json
+++ b/labs/nebula/models/m8/alignment-candidates.json
@@ -254,7 +254,7 @@
       "credit": "NASA/JPL-Caltech; HiPS: CDS (CNRS/Unistra)",
       "termsUrl": "https://www.spitzer.caltech.edu/page/image-use-policy",
       "skyBands": {
-        "path": "src/objects/m8/source/sky-bands/spitzer-irac.json"
+        "path": "src/objects/m8-volume/source/sky-bands/spitzer-irac.json"
       },
       "metadataNote": "Composed from pinned CDS hips2fits IRAC maps in MJy/sr, calibrated with IRAC Handbook surface-brightness factors, one measured background and range per band, then one Lupton asinh display. WCS is the recipe grid. MIPS 24 µm is omitted: its HiPS has no data over the Hourglass core."
     },
diff --git a/labs/nebula/models/m8/edge-taper-evidence.json b/labs/nebula/models/m8/edge-taper-evidence.json
index b21b84a3444..2e5e79b67d7 100644
--- a/labs/nebula/models/m8/edge-taper-evidence.json
+++ b/labs/nebula/models/m8/edge-taper-evidence.json
@@ -69,6 +69,6 @@
       "oblique"
     ],
     "result": "All six main-app captures inspected: faint outer footprints fade without the previous clear local rectangular seams. Browser and HTTP errors: zero. Coarse model and incomplete spectral coverage remain.",
-    "evidence": "src/objects/m8/README.md"
+    "evidence": "src/objects/m8-volume/README.md"
   }
 }
diff --git a/labs/nebula/models/m8/processing-observations.json b/labs/nebula/models/m8/processing-observations.json
index a04cd483a9a..364ffeb1447 100644
--- a/labs/nebula/models/m8/processing-observations.json
+++ b/labs/nebula/models/m8/processing-observations.json
@@ -156,7 +156,7 @@
       "credit": "NASA/JPL-Caltech; HiPS: CDS (CNRS/Unistra)",
       "termsUrl": "https://www.spitzer.caltech.edu/page/image-use-policy",
       "skyBands": {
-        "path": "src/objects/m8/source/sky-bands/spitzer-irac.json"
+        "path": "src/objects/m8-volume/source/sky-bands/spitzer-irac.json"
       },
       "metadataNote": "Composed from pinned CDS hips2fits IRAC maps in MJy/sr, calibrated with IRAC Handbook surface-brightness factors, one measured background and range per band, then one Lupton asinh display. WCS is the recipe grid. MIPS 24 µm is omitted: its HiPS has no data over the Hourglass core."
     }
diff --git a/labs/nebula/models/magellanic-particles.json b/labs/nebula/models/magellanic-particles.json
index 2b905ff4ef9..cfa04fddffe 100644
--- a/labs/nebula/models/magellanic-particles.json
+++ b/labs/nebula/models/magellanic-particles.json
@@ -17,7 +17,7 @@
     {
       "id": "lmc-particles",
       "directory": "labs/nebula/models/lmc-particles",
-      "referenceObject": "src/objects/lmc/object.json",
+      "referenceObject": "src/objects/lmc-volume/object.json",
       "photo": "labs/nebula/sources/lmc-smash-full.webp",
       "photoUrl": "https://noirlab.edu/public/images/noirlab2030a/",
       "photoCredit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
@@ -91,8 +91,8 @@
     {
       "id": "smc-particles",
       "directory": "labs/nebula/models/smc-particles",
-      "referenceObject": "src/objects/smc/object.json",
-      "photo": "src/objects/smc/source/source.jpg",
+      "referenceObject": "src/objects/smc-volume/object.json",
+      "photo": "src/objects/smc-volume/source/source.jpg",
       "photoUrl": "https://noirlab.edu/public/images/noirlab2030b/",
       "photoCredit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
       "starRange": {
diff --git a/labs/nebula/models/smc/README.md b/labs/nebula/models/smc/README.md
index 755c0dcb5a0..97347b6ae3f 100644
--- a/labs/nebula/models/smc/README.md
+++ b/labs/nebula/models/smc/README.md
@@ -48,6 +48,6 @@ The simulation is displaced and broader than the observed SMC. Measured image-to
 
 The inherited fixed-density painter is a **projection-only research baseline**. It does not satisfy the finite-3D-material acceptance gate. Its starless colours cannot establish gas/dust depth; front-image agreement would not validate side structure. The result records `materialGatePassed: false`. It is preserved as a rejected counterexample, not as a delivery.
 
-The finite emission models that superseded it also record `materialGatePassed: false`: a fitted projection and an inspected render are not a measured gas reconstruction. The broad envelope is the VMC-constrained ellipsoid's shape hypothesis and the detail components are conditioned on the Garver simulation, which the same VMC comparison disfavours. [Model `smc-constrained-emission-envelope-ellipsoid`](constrained/EMISSION-METHOD.md#ellipsoid-envelope-2026-09-17) and its five publisher-image datasets are now promoted to the application object; [its README](../../../../src/objects/smc/README.md) owns that delivery's evidence, inspection record and limitations. The four FITS survey-band composites stay in the lab with their recorded defects.
+The finite emission models that superseded it also record `materialGatePassed: false`: a fitted projection and an inspected render are not a measured gas reconstruction. The broad envelope is the VMC-constrained ellipsoid's shape hypothesis and the detail components are conditioned on the Garver simulation, which the same VMC comparison disfavours. [Model `smc-constrained-emission-envelope-ellipsoid`](constrained/EMISSION-METHOD.md#ellipsoid-envelope-2026-09-17) and its five publisher-image datasets are now promoted to the application object; [its README](../../../../src/objects/smc-volume/README.md) owns that delivery's evidence, inspection record and limitations. The four FITS survey-band composites stay in the lab with their recorded defects.
 
 Next: test spatially coherent depth-mode selection and finer finite supports against the image residual; correct the frozen VMC intake's RA-wrap omission as a versioned source change; give the Herschel SPIRE and DSS2 plate composites the coverage and gradient corrections their notes record. Preserve the failing projected-painter counterexample, the independent neutral shape comparison and the measured catalogue identities.
diff --git a/labs/nebula/models/smc/constrained/EMISSION-METHOD.md b/labs/nebula/models/smc/constrained/EMISSION-METHOD.md
index 37aaa4557a5..4feaeef46ef 100644
--- a/labs/nebula/models/smc/constrained/EMISSION-METHOD.md
+++ b/labs/nebula/models/smc/constrained/EMISSION-METHOD.md
@@ -93,6 +93,6 @@ The re-derivation is byte-identical wherever recorded provenance does not enter
 
 **Stars.** `prepare-smc-stars labs/nebula/models/smc/constrained/finite-datasets-ellipsoid.json` writes `../stars/prepared/stars-ellipsoid.json` (1,803 Bonanos et al. 2010 massive stars) and the model-owned index `.local/nebula-lab/finite-stars-smc-constrained-emission-envelope-ellipsoid.json`. Depths sample the joint emission and **the ellipsoid** density, so the same measured rays land a median 0.48 kpc from their positions in the simulation-envelope model. Tangent positions are identical by construction.
 
-**Application promotion.** This model's five publisher-image datasets are the shipped SMC object; see [the object's source-and-evidence README](../../../../../src/objects/smc/README.md) for the promotion recipe, the delivered bank and the app inspection record. The four FITS survey-band composites stay lab-only for the defects recorded in [candidate intake](../README-candidates.md#survey-band-composites).
+**Application promotion.** This model's five publisher-image datasets are the shipped SMC object; see [the object's source-and-evidence README](../../../../../src/objects/smc-volume/README.md) for the promotion recipe, the delivered bank and the app inspection record. The four FITS survey-band composites stay lab-only for the defects recorded in [candidate intake](../README-candidates.md#survey-band-composites).
 
 **Known problems.** Unchanged from the two-scale section: faint concentric ripples in the outer halo where alpha is still quantized, and detail bounded by the 384-pixel fit. The envelope is now the *ellipsoid's* shape hypothesis, still not measured gas depth, and an ellipsoid that scores better against red-clump tracers is not a measurement of the gas body. The detail components remain conditioned on the simulation the same comparison disfavours.
diff --git a/labs/nebula/models/smc/particles/source/provenance.json b/labs/nebula/models/smc/particles/source/provenance.json
index 707526482a4..c1823a1e03c 100644
--- a/labs/nebula/models/smc/particles/source/provenance.json
+++ b/labs/nebula/models/smc/particles/source/provenance.json
@@ -23,7 +23,7 @@
   },
   "density": "Mass-weighted CIC deposition of simulation stellar particles with authored offline Gaussian smoothing.",
   "photo": {
-    "path": "src/objects/smc/source/source.jpg",
+    "path": "src/objects/smc-volume/source/source.jpg",
     "url": "https://noirlab.edu/public/images/noirlab2030b/",
     "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
     "license": "CC-BY-4.0"
diff --git a/labs/nebula/packages/lab/src/adapters/application/delivery/catalogue-field.test.ts b/labs/nebula/packages/lab/src/adapters/application/delivery/catalogue-field.test.ts
index 150edc0f6d9..1d45b6588e3 100644
--- a/labs/nebula/packages/lab/src/adapters/application/delivery/catalogue-field.test.ts
+++ b/labs/nebula/packages/lab/src/adapters/application/delivery/catalogue-field.test.ts
@@ -155,7 +155,7 @@ test('runtime validation rejects lossy identifiers, malformed uncertainty, dupli
 });
 
 test('the acquired Crab catalogue prepares a nonempty physical volume with pinned uncertainty and no image stars', async () => {
-  const path = 'src/objects/m1/source/stellar-field.json', bytes = await readFile(path);
+  const path = 'src/objects/m1-volume/source/stellar-field.json', bytes = await readFile(path);
   const target = embedNebulaFrame(frame, { centerIcrsDegrees: [83.6334511837, 22.0151236394], distancePc: 2000, imageRotationDegrees: 0, arcsecPerUnit: 1 });
   const result = await prepareNebulaCatalogueField(process.cwd(), { path }, target, [{ ...retainedPoint, id: 'crab-pulsar' }]);
   assert.ok(result.receipt.catalogueCount > 0); assert.ok(result.receipt.maximumRelativeDistanceHalfWidth > 0);
@@ -166,7 +166,7 @@ test('the acquired Crab catalogue prepares a nonempty physical volume with pinne
 });
 
 test('the checked-in Helix selection retains wide-image cores and its central star across the budget and datasets', async () => {
-  const path = 'src/objects/helix/source/stellar-field.json', bytes = await readFile(path);
+  const path = 'src/objects/helix-volume/source/stellar-field.json', bytes = await readFile(path);
   const source: unknown = JSON.parse(bytes.toString());
   assert.ok(source && typeof source === 'object' && 'selection' in source && 'provenance' in source);
   const selection = source.selection, provenance = source.provenance;
@@ -208,12 +208,12 @@ test('the checked-in Helix selection retains wide-image cores and its central st
 });
 
 test('catalogue refresh preserves the existing Helix core identities, matching tolerance and evidence', async t => {
-  const sourceBytes = await readFile('src/objects/helix/source/stellar-field.json');
+  const sourceBytes = await readFile('src/objects/helix-volume/source/stellar-field.json');
   const source = JSON.parse(sourceBytes.toString());
-  const { root } = await fixture(t, {}), owner = join(root, 'src/objects/helix/source');
+  const { root } = await fixture(t, {}), owner = join(root, 'src/objects/helix-volume/source');
   await mkdir(owner, { recursive: true });
   await writeFile(join(owner, 'stellar-field.json'), sourceBytes);
-  await writeFile(join(owner, 'delivery.json'), await readFile('src/objects/helix/source/delivery.json'));
+  await writeFile(join(owner, 'delivery.json'), await readFile('src/objects/helix-volume/source/delivery.json'));
   // A one-row catalogue cache exercises the actual refresh CLI without requiring native processing or archive access.
   const query = source.provenance.query.replace(/^WITH candidates AS \(SELECT (?!ALL )/, 'WITH candidates AS (SELECT ALL ');
   const star = source.stars[0], columns = ['source_id', 'ra', 'dec', 'pmra', 'pmdec', 'parallax', 'parallax_error',
@@ -221,10 +221,10 @@ test('catalogue refresh preserves the existing Helix core identities, matching t
   const cells = [star.sourceId, star.raDeg, star.decDeg, star.pmRaMasYr, star.pmDecMasYr, star.parallaxMas,
     star.parallaxErrorMas, star.photGMeanMag, '', '', star.ruwe, star.distancePc, star.distanceLowerPc, star.distanceUpperPc];
   const cache = join(root, '.local/nebula-lab/stellar-fields'); await mkdir(cache, { recursive: true });
-  await writeFile(join(cache, 'helix.csv'), `${columns.join(',')}\n${cells.join(',')}\n`);
-  await writeFile(join(cache, 'helix.csv.query.json'), JSON.stringify({ query }));
+  await writeFile(join(cache, 'helix-volume.csv'), `${columns.join(',')}\n${cells.join(',')}\n`);
+  await writeFile(join(cache, 'helix-volume.csv.query.json'), JSON.stringify({ query }));
   const refreshed = spawnSync(process.execPath, ['--experimental-strip-types',
-    join(process.cwd(), 'packages/bake/cli/prepare-nebula-field-catalogues.mts'), 'helix'], { cwd: root, encoding: 'utf8', timeout: 3000 });
+    join(process.cwd(), 'packages/bake/cli/prepare-nebula-field-catalogues.mts'), 'helix-volume'], { cwd: root, encoding: 'utf8', timeout: 3000 });
   assert.equal(refreshed.status, 0, `${refreshed.error?.message ?? ''}\n${refreshed.stdout}\n${refreshed.stderr}`);
   assert.match(refreshed.stdout, /NEBULA_FIELD_CATALOGUES_COMPLETE/);
   const next = JSON.parse(await readFile(join(owner, 'stellar-field.json'), 'utf8'));
diff --git a/labs/nebula/packages/lab/src/adapters/application/delivery/cold-replay-parity.test.ts b/labs/nebula/packages/lab/src/adapters/application/delivery/cold-replay-parity.test.ts
index bb447fde2a1..3017060673b 100644
--- a/labs/nebula/packages/lab/src/adapters/application/delivery/cold-replay-parity.test.ts
+++ b/labs/nebula/packages/lab/src/adapters/application/delivery/cold-replay-parity.test.ts
@@ -6,7 +6,7 @@ import { readCompactCompiler } from './compact-compiler.ts';
 import { assertReplayScene } from './cold-replay-parity.ts';
 
 test('cold parity rejects independent field, frame, star, dataset and alpha mutations', async () => {
-  const input = readCompactCompiler(JSON.parse(gunzipSync(await readFile('src/objects/m42/source/bake-inputs.json.gz')).toString()));
+  const input = readCompactCompiler(JSON.parse(gunzipSync(await readFile('src/objects/m42-volume/source/bake-inputs.json.gz')).toString()));
   const expected = input.scene;
   assertReplayScene(structuredClone(expected), expected);
   for (const mutate of [
diff --git a/labs/nebula/packages/lab/src/adapters/application/delivery/compact-compiler.test.ts b/labs/nebula/packages/lab/src/adapters/application/delivery/compact-compiler.test.ts
index ce55b3089ff..f79d7077ae6 100644
--- a/labs/nebula/packages/lab/src/adapters/application/delivery/compact-compiler.test.ts
+++ b/labs/nebula/packages/lab/src/adapters/application/delivery/compact-compiler.test.ts
@@ -3,7 +3,7 @@ import { readFile } from 'node:fs/promises';
 import test from 'node:test';
 import { gunzipSync } from 'node:zlib';
 import { readCompactCompiler } from './compact-compiler.ts';
-const input = async () => JSON.parse(gunzipSync(await readFile('src/objects/m42/source/bake-inputs.json.gz')).toString());
+const input = async () => JSON.parse(gunzipSync(await readFile('src/objects/m42-volume/source/bake-inputs.json.gz')).toString());
 test('compact compiler validates the accepted field, material correspondence and sampling', async () => {
   const value = await input(), parsed = readCompactCompiler(value);
   assert.equal(parsed.objectId, 'm42');
diff --git a/labs/nebula/packages/lab/src/adapters/application/delivery/compact-sampled.test.ts b/labs/nebula/packages/lab/src/adapters/application/delivery/compact-sampled.test.ts
index b9e44d39a69..fba2b7d3c1d 100644
--- a/labs/nebula/packages/lab/src/adapters/application/delivery/compact-sampled.test.ts
+++ b/labs/nebula/packages/lab/src/adapters/application/delivery/compact-sampled.test.ts
@@ -10,7 +10,7 @@ import { maximumPlanningEmission, prepareCompactSampledInputs } from '@cssearth/
 test("compact sampled replay rejects changed measured particles before any reconstruction", async () => {
   const root = await mkdtemp(join(tmpdir(), "nebula-sampled-"));
   try {
-    const path = "src/objects/m1/source/compact/model.json.gz";
+    const path = "src/objects/m1-volume/source/compact/model.json.gz";
     const bytes = await readFile(path);
     const model: unknown = JSON.parse(gunzipSync(bytes).toString());
     assert.ok(
@@ -56,7 +56,7 @@ test('sampled planning preserves features unique to any dataset without changing
 test('retained sampled loader rejects a renamed scene before reading particles or writing outputs', async () => {
   const root = await mkdtemp(join(tmpdir(), 'nebula-retained-sampled-'));
   try {
-    const value: unknown = JSON.parse(gunzipSync(await readFile('src/objects/m1/source/compact/model.json.gz')).toString());
+    const value: unknown = JSON.parse(gunzipSync(await readFile('src/objects/m1-volume/source/compact/model.json.gz')).toString());
     assert.ok(jointRecord(value)); value.sourceResult = 'another-result';
     const bytes = gzipSync(Buffer.from(JSON.stringify(value))), path = 'input.json.gz';
     await writeFile(join(root, path), bytes);
diff --git a/labs/nebula/packages/lab/src/adapters/application/delivery/compact-symmetry.test.ts b/labs/nebula/packages/lab/src/adapters/application/delivery/compact-symmetry.test.ts
index 737573af800..72bffe9db5f 100644
--- a/labs/nebula/packages/lab/src/adapters/application/delivery/compact-symmetry.test.ts
+++ b/labs/nebula/packages/lab/src/adapters/application/delivery/compact-symmetry.test.ts
@@ -4,13 +4,13 @@ import { mkdtemp, cp, readFile, writeFile, rm } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { replayCompactSymmetry } from "./compact-symmetry.ts";
-const path = "src/objects/m2-9/source/compact/model.json";
+const path = "src/objects/m2-9-volume/source/compact/model.json";
 test("retained symmetry fields replay accepted slices without source photographs", async () => {
   const root = await mkdtemp(join(tmpdir(), "nebula-symmetry-"));
   try {
     await cp(
-      "src/objects/m2-9/source/compact",
-      join(root, "src/objects/m2-9/source/compact"),
+      "src/objects/m2-9-volume/source/compact",
+      join(root, "src/objects/m2-9-volume/source/compact"),
       { recursive: true },
     );
     const bytes = await readFile(join(root, path));
@@ -26,11 +26,11 @@ test("retained symmetry fields replay accepted slices without source photographs
       assert.equal(pixels.length, resource.bytes);
     }
     const corrupt = await readFile(
-      join(root, "src/objects/m2-9/source/compact/emission-0.f32.gz"),
+      join(root, "src/objects/m2-9-volume/source/compact/emission-0.f32.gz"),
     );
     corrupt[0] = corrupt[0]! ^ 1;
     await writeFile(
-      join(root, "src/objects/m2-9/source/compact/emission-0.f32.gz"),
+      join(root, "src/objects/m2-9-volume/source/compact/emission-0.f32.gz"),
       corrupt,
     );
     await assert.rejects(
diff --git a/labs/nebula/packages/lab/src/adapters/application/delivery/nebula-objects.test.ts b/labs/nebula/packages/lab/src/adapters/application/delivery/nebula-objects.test.ts
index cdbb099c35a..cd8d5c1cfcd 100644
--- a/labs/nebula/packages/lab/src/adapters/application/delivery/nebula-objects.test.ts
+++ b/labs/nebula/packages/lab/src/adapters/application/delivery/nebula-objects.test.ts
@@ -9,13 +9,13 @@ import { validatePreparedVolumeDatasets } from '@cssearth/renderer/volume/prepar
 import { prepareNebulaObject, readNebulaDelivery } from './nebula-objects.ts';
 
 test('a pinned optical composite is a compiler delivery stage, never a symmetry fallback', async () => {
-  const recipe: unknown = JSON.parse(await readFile('src/objects/m45/source/delivery.json', 'utf8'));
+  const recipe: unknown = JSON.parse(await readFile('src/objects/m45-volume/source/delivery.json', 'utf8'));
   const parsed = readNebulaDelivery(recipe);
   assert.equal(parsed.defaultDataset, 'optical-composite');
   assert.equal(parsed.compositeRecipe?.path, 'labs/nebula/models/m45/optical-composite.json');
   assert.ok(parsed.compositeRecipe);
   assert.throws(() => readNebulaDelivery({ ...parsed, schema: 'cssearth-nebula-delivery@2', method: 'axial-symmetry' }), /requires compiler/);
-  const ordinary = readNebulaDelivery(JSON.parse(await readFile('src/objects/m8/source/delivery.json', 'utf8')));
+  const ordinary = readNebulaDelivery(JSON.parse(await readFile('src/objects/m8-volume/source/delivery.json', 'utf8')));
   assert.equal(ordinary.compositeRecipe, undefined);
 });
 async function put(root: string, path: string, bytes: Uint8Array | string) {
@@ -32,7 +32,7 @@ async function fixture(root: string) {
     }
   }
   const request = '{}', directory = join(root,'object');
-  const recipe = JSON.parse(await readFile('src/objects/m2-9/source/delivery.json','utf8'));
+  const recipe = JSON.parse(await readFile('src/objects/m2-9-volume/source/delivery.json','utf8'));
   for (const path of [recipe.fieldStars.path, 'packages/renderer/src/navigation/world-camera-math.ts',
     'packages/renderer/src/stars/prepared-catalogue-points.ts']) {
     await put(root,path,await readFile(path));
@@ -40,7 +40,7 @@ async function fixture(root: string) {
   await put(root,'input/request.json',request);
   await put(directory,'source/delivery.json',JSON.stringify({...recipe,
     request:{path:'input/request.json'},inputPins:[],compactInputs:undefined,compactMethod:undefined,symmetryDirectory:'input'}));
-  await copyFile('src/objects/m2-9/source/nebula.json',join(directory,'source/nebula.json'));
+  await copyFile('src/objects/m2-9-volume/source/nebula.json',join(directory,'source/nebula.json'));
   const pixels = await sharp({create:{width:2,height:2,channels:4,background:{r:220,g:80,b:30,alpha:0.6}}}).png().toBuffer();
   const matrices: Record<VolumeAxis,string> = {
     x:'50,0,0,0,0,0,50,0,0,1,0,0,-50,0,-50,1',
diff --git a/labs/nebula/packages/lab/src/features/observations/recipe.test.ts b/labs/nebula/packages/lab/src/features/observations/recipe.test.ts
index c607951ec48..12aad65f411 100644
--- a/labs/nebula/packages/lab/src/features/observations/recipe.test.ts
+++ b/labs/nebula/packages/lab/src/features/observations/recipe.test.ts
@@ -25,6 +25,6 @@ test('registration detector settings reject unbounded, noninteger and incompatib
 
 test('composed sky band sources cache under their own name; publisher sources keep their downloaded name', () => {
   assert.equal(observationSourceFile({ id: 'spitzer-mid-infrared' }), 'spitzer-mid-infrared.tif');
-  assert.equal(observationSourceFile({ id: 'spitzer-mid-infrared', skyBands: { path: 'src/objects/m8/source/sky-bands/spitzer-irac.json' } }),
+  assert.equal(observationSourceFile({ id: 'spitzer-mid-infrared', skyBands: { path: 'src/objects/m8-volume/source/sky-bands/spitzer-irac.json' } }),
     'spitzer-mid-infrared.skybands.png');
 });
diff --git a/labs/nebula/packages/lab/src/resources/model-catalogue.test.ts b/labs/nebula/packages/lab/src/resources/model-catalogue.test.ts
index 8998b62dbb4..fa75913b8e4 100644
--- a/labs/nebula/packages/lab/src/resources/model-catalogue.test.ts
+++ b/labs/nebula/packages/lab/src/resources/model-catalogue.test.ts
@@ -9,7 +9,7 @@ const read = async (path: string) => parseLabModelJson(await readFile(path, 'utf
 test('the curated lab retains the selected LMC images, SMC comparisons and verified density banks', async () => {
   const ids = ['vista-infrared', 'horalek-widefield', 'wise-wide-infrared'];
   const subjects = await read('labs/nebula/packages/lab/src/state/subjects.json');
-  assert.deepEqual(subjects.map((subject: {id: string}) => subject.id), ['lmc-clouds', 'smc-particles', 'smc-vmc', 'smc-ellipsoid', 'smc-constrained', 'm2-9-inferred', 'helix-single-axis', 'helix-model-prior', 'm42', 'm8', 'carina', 'ngc6357', 'm78', 'horsehead', 'm45', 'omega-centauri', 'm1']);
+  assert.deepEqual(subjects.map((subject: {id: string}) => subject.id), ['lmc-clouds', 'smc-particles', 'smc-vmc', 'smc-ellipsoid', 'smc-constrained', 'm2-9-inferred', 'helix-single-axis', 'helix-model-prior', 'm42', 'm8', 'carina', 'ngc6357', 'm78', 'horsehead', 'm45', 'omega-centauri', 'm1', 'm87-inferred']);
   const experiment = subjects.find((subject: {id: string}) => subject.id === 'm2-9-inferred');
   assert.equal(experiment.density, undefined, 'An inferred-emission experiment must not masquerade as an independent density prior.');
   assert.equal(experiment.directory, experiment.emissionExperiment.directory);
diff --git a/package.json b/package.json
index a7d4acb73dd..10e8d217081 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
   },
   "scripts": {
     "build": "astro build && node packages/bake/cli/run-implemented-objects.mts assemble",
-    "build:deploy": "pnpm build:packages && pnpm setup:asset-data && pnpm prepare:tool-inputs && pnpm prepare:world-presentation && pnpm prepare:shell-assets && pnpm prepare:dataset-sprites && node packages/bake/cli/prepare-factsheets.mts --quiet && node site/build/prepare/prepare-feature-index.mts && pnpm prepare:dataset-billboards && pnpm prepare:environment-images && node packages/bake/cli/prepare-nebulae.mts --if-missing && node site/build/prepare/prepare-facilities.mts --catalog-only && astro build && node site/build/share-images.mts && node packages/bake/cli/run-implemented-objects.mts assemble && node site/build/bundle-netlify-functions.mts && node site/build/prerender-focus-pages.mts",
+    "build:deploy": "pnpm build:packages && pnpm setup:asset-data && pnpm prepare:tool-inputs && pnpm prepare:world-presentation && pnpm prepare:shell-assets && pnpm prepare:dataset-sprites && node packages/bake/cli/prepare-factsheets.mts --quiet && node site/build/prepare/prepare-feature-index.mts && pnpm prepare:dataset-billboards && pnpm prepare:environment-images && node packages/bake/cli/prepare-nebulae.mts --if-missing && node site/build/prepare/prepare-facilities.mts --catalog-only && astro build && node site/build/share-images.mts && node packages/bake/cli/run-implemented-objects.mts assemble && node site/build/bundle-netlify-functions.mts && node site/build/prerender-level-pages.mts",
     "build:astronomy": "pnpm --filter @cssearth/astronomy build",
     "build:catalog": "pnpm --filter @cssearth/catalog build",
     "build:core": "pnpm --filter @cssearth/core build",
diff --git a/packages/astronomy/cli/body-records.mts b/packages/astronomy/cli/body-records.mts
index cedf071c872..53a5be47a2a 100644
--- a/packages/astronomy/cli/body-records.mts
+++ b/packages/astronomy/cli/body-records.mts
@@ -43,12 +43,13 @@ function bodyRecord(value: unknown): BodyRecord {
   }
   // Zero radius means no source measures one; only a star or black hole known from its hosted orbit alone may lack it (most S-stars,
   // the black hole of Cygnus X-1).
-  if (physical.meanRadiusKm === 0 && (!['star', 'black-hole'].includes(record.classification) || record.hostedOrbit === undefined)) {
-    throw new TypeError(`Only a hosted star or black hole may have an unmeasured radius: ${record.id} has meanRadiusKm 0.`);
+  // An extended placed body (a galaxy, a cluster, a nebula) has no single measured radius: its package frames it instead.
+  if (physical.meanRadiusKm === 0 && !EXTENDED.includes(record.classification) && (!['star', 'black-hole'].includes(record.classification) || record.hostedOrbit === undefined)) {
+    throw new TypeError(`Only a hosted star or black hole, or an extended placed body, may have an unmeasured radius: ${record.id} has meanRadiusKm 0.`);
   }
   // A star or black hole beyond the Solar System is placed by its astrometry and orbits nothing this package models.
-  if (record.star !== undefined && (!['star', 'black-hole'].includes(record.classification) || physical.parent !== null)) {
-    throw new TypeError(`Placement astrometry belongs to a parentless star or black hole: ${record.id}.`);
+  if (record.star !== undefined && (!PLACED.includes(record.classification) || physical.parent !== null)) {
+    throw new TypeError(`Placement astrometry belongs to a parentless placed body (${PLACED.join(', ')}): ${record.id}.`);
   }
   // A hosted orbit is placed around its parent: every exoplanet has one, and a star may have one instead of its own placement
   // (the S-stars around Sgr A*), and so may a black hole (the one of Cygnus X-1). The parent must be placed; readBodyRecords checks that.
@@ -67,7 +68,10 @@ const packageRoot = resolve(import.meta.dirname, '..');
 const order = (a: {id: string; order?: number}, b: {id: string; order?: number}) => (a.order ?? Number.MAX_SAFE_INTEGER) - (b.order ?? Number.MAX_SAFE_INTEGER) || a.id.localeCompare(b.id, 'en');
 const kinds = { planet: 'PLANET_IDS', 'dwarf-planet': 'DWARF_PLANET_IDS', asteroid: 'ASTEROID_IDS',
   'trans-neptunian': 'TRANS_NEPTUNIAN_IDS', interstellar: 'INTERSTELLAR_IDS', comet: 'COMET_IDS', exoplanet: 'EXOPLANET_IDS',
-  'black-hole': 'BLACK_HOLE_IDS' };
+  'black-hole': 'BLACK_HOLE_IDS', galaxy: 'GALAXY_IDS', 'galaxy-cluster': 'GALAXY_CLUSTER_IDS', nebula: 'NEBULA_IDS', 'globular-cluster': 'GLOBULAR_CLUSTER_IDS' };
+/** Classifications placed by astrometry, as @cssearth/objects PLACED_CLASSIFICATIONS lists them (this package does not import it). */
+const EXTENDED = ['galaxy', 'galaxy-cluster', 'nebula', 'globular-cluster'];
+const PLACED = ['star', 'black-hole', ...EXTENDED];
 const models = {
   asteroid: ['ASTEROID_ELEMENTS', "import type { KeplerianElements } from '../../kepler.js'", '{ query: string; elements: KeplerianElements }'],
   comet: ['COMET_ELEMENTS', "import type { KeplerianElements } from '../../kepler.js'", '{ query: string; elements: KeplerianElements }'],
diff --git a/packages/astronomy/data/bodies/fornax-cluster.json b/packages/astronomy/data/bodies/fornax-cluster.json
new file mode 100644
index 00000000000..83dfecbf140
--- /dev/null
+++ b/packages/astronomy/data/bodies/fornax-cluster.json
@@ -0,0 +1,28 @@
+{
+  "id": "fornax-cluster",
+  "classification": "galaxy-cluster",
+  "order": 5136,
+  "physical": {
+    "name": "Fornax Cluster",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Fornax Cluster is recorded: it is an extended cluster of galaxies, and its package frames it at 619600 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 54.6163,
+    "declinationDegrees": -35.4482,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 19660746.338790987,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 1528.9,
+    "sources": {
+      "position": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe (https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz); catalogue reference mcxc-ii:MCXC J0338.4-3526",
+      "distance": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table (https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94); catalogue reference cosmicflows-4:13418: 19660746.338790987 pc; Cosmicflows-4 group distance: the weighted average of its members' distance moduli on the calibrated scale (table 3, DMzp).",
+      "properMotion": "Zero: the cluster of galaxies is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "c z for the catalogued redshift z = 0.0051: Redshift reference 2004A&A...425..367B, transcribed from MCXC-II. (https://ui.adsabs.harvard.edu/abs/2004A&A...425..367B); catalogue reference 2004A&A...425..367B"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/helix.json b/packages/astronomy/data/bodies/helix.json
new file mode 100644
index 00000000000..114d6ab817d
--- /dev/null
+++ b/packages/astronomy/data/bodies/helix.json
@@ -0,0 +1,28 @@
+{
+  "id": "helix",
+  "classification": "nebula",
+  "order": 5137,
+  "physical": {
+    "name": "Helix Nebula",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Helix Nebula is recorded: it is an extended nebula, and its package frames it at 1.571 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 337.4107083333334,
+    "declinationDegrees": -20.83717222222222,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 216,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": -15,
+    "sources": {
+      "position": "ESO ESO WFI · optical detail image and publisher astrometry; registration retained in the observation recipe (https://cdn.eso.org/images/original/eso0907a.tif); catalogue reference helix-registered-images",
+      "distance": "Benedict et al. (2009), HST parallaxes of planetary nebula nuclei (https://arxiv.org/abs/0909.4281); catalogue reference benedict-2009: 216 pc (-12/+14); Adopted published trigonometric parallax; not a fitted image scale.",
+      "properMotion": "Zero: the nebula is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD NGC 7293: -15 km/s +/- 10, from 1953GCRV..C......0W (https://ui.adsabs.harvard.edu/abs/1953GCRV..C......0W/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/lmc.json b/packages/astronomy/data/bodies/lmc.json
new file mode 100644
index 00000000000..62ed279eaba
--- /dev/null
+++ b/packages/astronomy/data/bodies/lmc.json
@@ -0,0 +1,28 @@
+{
+  "id": "lmc",
+  "classification": "galaxy",
+  "order": 5138,
+  "physical": {
+    "name": "LMC",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of LMC is recorded: it is an extended galaxy, and its package frames it at 5000 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 78.76,
+    "declinationDegrees": -69.19,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 49590.6727505,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 262.2,
+    "sources": {
+      "position": "vanderMarel2014ApJ...781..121V: Third-epoch Magellanic Cloud Proper Motions. II. The Large Magellanic Cloud Rotation Field in Three Dimensions (https://ui.adsabs.harvard.edu/abs/2014ApJ...781..121V); catalogue reference vanderMarel2014ApJ...781..121V",
+      "distance": "Pietrzynski2019Natur.567..200P: A distance to the Large Magellanic Cloud that is precise to one per cent (https://ui.adsabs.harvard.edu/abs/2019Natur.567..200P); catalogue reference Pietrzynski2019Natur.567..200P: 49590.6727505 pc (-545.078605979/+551.136452599); unspecified",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD NAME LMC: 262.2 km/s +/- 3.4, from 2012AJ....144....4M (https://ui.adsabs.harvard.edu/abs/2012AJ....144....4M/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/local-group.json b/packages/astronomy/data/bodies/local-group.json
new file mode 100644
index 00000000000..d34948d4af2
--- /dev/null
+++ b/packages/astronomy/data/bodies/local-group.json
@@ -0,0 +1,28 @@
+{
+  "id": "local-group",
+  "classification": "galaxy-cluster",
+  "order": 5154,
+  "physical": {
+    "name": "Local Group",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of the Local Group is recorded here: it is a group of galaxies, and its package frames it at 1060000 pc (object.json worldFrame.bodyRadiusM), the zero-velocity surface radius R_LG = 1060 +/- 70 kpc of McConnachie (2012), AJ 144, 4 (https://arxiv.org/abs/1204.1562), section 3.",
+  "star": {
+    "rightAscensionDegrees": 9.99294,
+    "declinationDegrees": 41.12706,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 386146,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 0,
+    "sources": {
+      "position": "The mid-point of the vector connecting the Milky Way and M31, where McConnachie (2012), AJ 144, 4 (https://arxiv.org/abs/1204.1562), Table 2 notes to columns 8 to 10, places the barycentre of the Local Group. Computed 2026-10-01 from this repository's records of the Galactic centre (sgr-a-star.json) and M31 (m31.json).",
+      "distance": "The Sun's distance from that mid-point, from the same two records: 386146 pc. The paper adopts (m-M)0 = 24.47 for M31; the mid-point here uses the M31 distance this repository draws M31 at, so the marker sits between the two as drawn.",
+      "properMotion": "Zero: the group is held at this position; no motion across the sky is applied.",
+      "radialVelocity": "Zero: a mid-point has no measured radial velocity; the group is held at its distance."
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m1.json b/packages/astronomy/data/bodies/m1.json
new file mode 100644
index 00000000000..c48b771162b
--- /dev/null
+++ b/packages/astronomy/data/bodies/m1.json
@@ -0,0 +1,28 @@
+{
+  "id": "m1",
+  "classification": "nebula",
+  "order": 5139,
+  "physical": {
+    "name": "Crab Nebula",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Crab Nebula is recorded: it is an extended nebula, and its package frames it at 1.317 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 83.6334511837,
+    "declinationDegrees": 22.0151236394,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 2000,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 0,
+    "sources": {
+      "position": "Pinned common ICRS image-frame origin derived from registered observations; adopted display centre, not a measured nebular centroid. (https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/observations.json); catalogue reference m1-registered-frame",
+      "distance": "Martin, Milisavljevic & Drissen (2021), 3D mapping of the Crab Nebula with SITELLE. I (https://arxiv.org/pdf/2101.02709v1); catalogue reference martin-2021: 2000 pc; Adopted 2 kpc reconstruction scale from Martin et al. (2021), section 3.4, following Trimble (1973). The cited 1.7–2.4 kpc range is not a statistical error. Lin et al. (2023) independently find 1.90 −0.18/+0.22 kpc; no distance refit is applied.",
+      "properMotion": "Zero: the nebula is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "Zero: SIMBAD lists no radial velocity for M 1 (queried 2026-10-01); the nebula is held at its catalogued distance."
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m2-9.json b/packages/astronomy/data/bodies/m2-9.json
new file mode 100644
index 00000000000..9a26ef67d41
--- /dev/null
+++ b/packages/astronomy/data/bodies/m2-9.json
@@ -0,0 +1,28 @@
+{
+  "id": "m2-9",
+  "classification": "nebula",
+  "order": 5140,
+  "physical": {
+    "name": "Twin Jet Nebula",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Twin Jet Nebula is recorded: it is an extended nebula, and its package frames it at 0.09144 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 256.407962101,
+    "declinationDegrees": -10.1425459988,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 650,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 0,
+    "sources": {
+      "position": "NASA/ESA Hubble 1997 image opo9738a; AVM sky astrometry (https://esahubble.org/media/archives/images/original/opo9738a.tif); catalogue reference hst-opo9738a",
+      "distance": "Sánchez Contreras et al. A&A 692, A151 (2024) (https://arxiv.org/html/2411.03825v1); catalogue reference sanchez-contreras-2024: 650 pc; Adopted model distance, not a parallax. Published expansion alternative:1300±200pc.",
+      "properMotion": "Zero: the nebula is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "Zero: SIMBAD lists no radial velocity for PN M 2-9 (queried 2026-10-01); the nebula is held at its catalogued distance."
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m31.json b/packages/astronomy/data/bodies/m31.json
new file mode 100644
index 00000000000..4a5ab377323
--- /dev/null
+++ b/packages/astronomy/data/bodies/m31.json
@@ -0,0 +1,28 @@
+{
+  "id": "m31",
+  "classification": "galaxy",
+  "order": 5141,
+  "physical": {
+    "name": "M 31",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of M 31 is recorded: it is an extended galaxy, and its package frames it at 25000 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 10.683916666666665,
+    "declinationDegrees": 41.26566666666666,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 776247.116629,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": -300,
+    "sources": {
+      "position": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1. (https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv); catalogue reference lvdb-v1.1.1:m_031:location",
+      "distance": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure (https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S); catalogue reference Savino2022ApJ...938..101S: 776247.116629 pc (-21154.8889633/+21747.5706393); unspecified",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD M 31: -300 km/s +/- 4, from 2012AJ....144....4M (https://ui.adsabs.harvard.edu/abs/2012AJ....144....4M/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m33.json b/packages/astronomy/data/bodies/m33.json
new file mode 100644
index 00000000000..05f689c564f
--- /dev/null
+++ b/packages/astronomy/data/bodies/m33.json
@@ -0,0 +1,28 @@
+{
+  "id": "m33",
+  "classification": "galaxy",
+  "order": 5142,
+  "physical": {
+    "name": "M 33",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of M 33 is recorded: it is an extended galaxy, and its package frames it at 9000 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 23.462,
+    "declinationDegrees": 30.6603,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 859013.521505,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": -179.2,
+    "sources": {
+      "position": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1. (https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv); catalogue reference lvdb-v1.1.1:m_033:location",
+      "distance": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure (https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S); catalogue reference Savino2022ApJ...938..101S: 859013.521505 pc (-23410.5032741/+24066.3789132); unspecified",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD M 33: -179.2 km/s +/- 1.7, from 2012AJ....144....4M (https://ui.adsabs.harvard.edu/abs/2012AJ....144....4M/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m42.json b/packages/astronomy/data/bodies/m42.json
new file mode 100644
index 00000000000..726b922e81e
--- /dev/null
+++ b/packages/astronomy/data/bodies/m42.json
@@ -0,0 +1,28 @@
+{
+  "id": "m42",
+  "classification": "nebula",
+  "order": 5143,
+  "physical": {
+    "name": "Orion Nebula",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Orion Nebula is recorded: it is an extended nebula, and its package frames it at 4.817 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 83.78715182853901,
+    "declinationDegrees": -5.400382551151912,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 414,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 27.8,
+    "sources": {
+      "position": "ESO ESO · optical image and publisher astrometry; registration retained in the observation recipe (https://cdn.eso.org/images/publicationtiff/eso1723a.tif); catalogue reference m42-registered-images",
+      "distance": "Menten et al. (2007), The distance to the Orion Nebula (https://arxiv.org/abs/0709.0485); catalogue reference menten-2007: 414 pc (-7/+7); Adopted published trigonometric parallax; not a fitted image scale.",
+      "properMotion": "Zero: the nebula is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD M 42: 27.8 km/s +/- 5, from 2017A&A...600A.106C (https://ui.adsabs.harvard.edu/abs/2017A%26A...600A.106C/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m45.json b/packages/astronomy/data/bodies/m45.json
new file mode 100644
index 00000000000..9a71cef222c
--- /dev/null
+++ b/packages/astronomy/data/bodies/m45.json
@@ -0,0 +1,28 @@
+{
+  "id": "m45",
+  "classification": "nebula",
+  "order": 5144,
+  "physical": {
+    "name": "Pleiades",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Pleiades is recorded: it is an extended nebula, and its package frames it at 3.539 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 56.75,
+    "declinationDegrees": 24.1167,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 136.2,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 5.88,
+    "sources": {
+      "position": "Pinned common ICRS image-frame origin derived from registered observations; adopted display centre, not a measured nebular centroid. (https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/processing-observations.json); catalogue reference m45-registered-frame",
+      "distance": "Melis et al. (2014), A VLBI Resolution of the Pleiades Distance Controversy (https://arxiv.org/pdf/1408.6544); catalogue reference melis-2014: 136.2 pc (-1.2/+1.2); Adopted VLBI stellar-cluster distance from Melis et al. (2014), main text and Table 1; not a measured distance to each dust filament.",
+      "properMotion": "Zero: the nebula is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD M 45: 5.88 km/s +/- 0.03, from 2021A&A...647A..19T (https://ui.adsabs.harvard.edu/abs/2021A%26A...647A..19T/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m8.json b/packages/astronomy/data/bodies/m8.json
new file mode 100644
index 00000000000..5f78552144c
--- /dev/null
+++ b/packages/astronomy/data/bodies/m8.json
@@ -0,0 +1,28 @@
+{
+  "id": "m8",
+  "classification": "nebula",
+  "order": 5145,
+  "physical": {
+    "name": "Lagoon Nebula",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Lagoon Nebula is recorded: it is an extended nebula, and its package frames it at 21.95 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 270.76531645904527,
+    "declinationDegrees": -24.30622861770443,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 1326,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 0,
+    "sources": {
+      "position": "Pinned common ICRS image-frame origin derived from registered observations; adopted display centre, not a measured nebular centroid. (https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/processing-observations.json); catalogue reference m8-registered-frame",
+      "distance": "Wright et al. (2019), The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2 (https://arxiv.org/pdf/1903.12176v1); catalogue reference wright-2019-kinematics: 1326 pc (-69/+77); Adopted Gaia DR2 cluster distance from Wright et al. (2019), section 3.4: 1326 −69/+77 pc, including the stated parallax zero-point correction and systematic uncertainty. It is not an individual gas-cloud depth measurement.",
+      "properMotion": "Zero: the nebula is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "Zero: SIMBAD lists no radial velocity for M 8 (queried 2026-10-01); the nebula is held at its catalogued distance."
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m81.json b/packages/astronomy/data/bodies/m81.json
new file mode 100644
index 00000000000..4c996505d45
--- /dev/null
+++ b/packages/astronomy/data/bodies/m81.json
@@ -0,0 +1,28 @@
+{
+  "id": "m81",
+  "classification": "galaxy",
+  "order": 5146,
+  "physical": {
+    "name": "M81",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of M81 is recorded: it is an extended galaxy, and its package frames it at 16500 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 148.8883,
+    "declinationDegrees": 69.065278,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 3614098.6264,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": -47.003684215379074,
+    "sources": {
+      "position": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1. (https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv); catalogue reference lvdb-v1.1.1:m_081:location",
+      "distance": "Newman2024ApJ...966..175N: An Empirical Calibration of the Tip of the Red Giant Branch Distance Method in the Near Infrared. I. Hubble Space Telescope WFC3/IR F110W and F160W Filters (https://ui.adsabs.harvard.edu/abs/2024ApJ...966..175N); catalogue reference Newman2024ApJ...966..175N: 3614098.6264 pc (-65964.7340604/+33440.8428599); trgb",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD M 81: -47.003684215379074 km/s +/- 0.00007004846, from 2022ApJS..261....6K (https://ui.adsabs.harvard.edu/abs/2022ApJS..261....6K/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m83.json b/packages/astronomy/data/bodies/m83.json
new file mode 100644
index 00000000000..a95c40ee3fb
--- /dev/null
+++ b/packages/astronomy/data/bodies/m83.json
@@ -0,0 +1,28 @@
+{
+  "id": "m83",
+  "classification": "galaxy",
+  "order": 5147,
+  "physical": {
+    "name": "M83",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of M83 is recorded: it is an extended galaxy, and its package frames it at 9300 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 204.2504167,
+    "declinationDegrees": -29.8678,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 4897788.19368,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 519.1,
+    "sources": {
+      "position": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1. (https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv); catalogue reference lvdb-v1.1.1:m_083:location",
+      "distance": "Tully2009AJ....138..323T: The Extragalactic Distance Database (https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T); catalogue reference Tully2009AJ....138..323T: 4897788.19368 pc (-67200.1732867/+68135.0208189); unspecified",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD M 83: 519.1 km/s, from 2004MNRAS.350.1195M (https://ui.adsabs.harvard.edu/abs/2004MNRAS.350.1195M/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/m87.json b/packages/astronomy/data/bodies/m87.json
new file mode 100644
index 00000000000..c95a82d7576
--- /dev/null
+++ b/packages/astronomy/data/bodies/m87.json
@@ -0,0 +1,28 @@
+{
+  "id": "m87",
+  "classification": "galaxy",
+  "order": 5148,
+  "physical": {
+    "name": "M87",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of M87 is recorded: it is an extended galaxy, and its package frames it at 199000 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 187.70593076725,
+    "declinationDegrees": 12.391123246083334,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 16800000,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 1256.4841773442704,
+    "sources": {
+      "position": "Charlot et al. (2020), A&A 644, A159: ICRF3, the position SIMBAD adopts for M 87. (https://doi.org/10.1051/0004-6361/202038368); catalogue reference Charlot2020A&A...644A.159C",
+      "distance": "Event Horizon Telescope Collaboration (2019), ApJL 875, L1 (M87 Paper I), Table 1: D = 16.8 +/- 0.8 Mpc, rederived from likelihood distributions in Paper VI. (https://arxiv.org/abs/1906.11238); catalogue reference EHT2019ApJ...875L...1E: 16800000 pc (-800000/+800000); adopted",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD M 87: 1256.4841773442704 km/s +/- 0.00012, from 2009ApJS..182..543A (https://ui.adsabs.harvard.edu/abs/2009ApJS..182..543A/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/ngc-253.json b/packages/astronomy/data/bodies/ngc-253.json
new file mode 100644
index 00000000000..1ee2f15b74a
--- /dev/null
+++ b/packages/astronomy/data/bodies/ngc-253.json
@@ -0,0 +1,28 @@
+{
+  "id": "ngc-253",
+  "classification": "galaxy",
+  "order": 5149,
+  "physical": {
+    "name": "NGC 253",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of NGC 253 is recorded: it is an extended galaxy, and its package frames it at 19900 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 11.888,
+    "declinationDegrees": -25.28822,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 3467368.50453,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 258.8,
+    "sources": {
+      "position": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1. (https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv); catalogue reference lvdb-v1.1.1:ngc_0253:location",
+      "distance": "RadburnSmith2011ApJS..195...18R: The GHOSTS Survey. I. Hubble Space Telescope Advanced Camera for Surveys Data (https://ui.adsabs.harvard.edu/abs/2011ApJS..195...18R); catalogue reference RadburnSmith2011ApJS..195...18R: 3467368.50453 pc (-109992.362096/+113595.866501); trgb",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD NGC 253: 258.8 km/s, from 2004MNRAS.350.1195M (https://ui.adsabs.harvard.edu/abs/2004MNRAS.350.1195M/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/ngc-300.json b/packages/astronomy/data/bodies/ngc-300.json
new file mode 100644
index 00000000000..6deff55641f
--- /dev/null
+++ b/packages/astronomy/data/bodies/ngc-300.json
@@ -0,0 +1,28 @@
+{
+  "id": "ngc-300",
+  "classification": "galaxy",
+  "order": 5150,
+  "physical": {
+    "name": "NGC 300",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of NGC 300 is recorded: it is an extended galaxy, and its package frames it at 9400 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 13.7229167,
+    "declinationDegrees": -37.68444444,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 2089296.13085,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 146,
+    "sources": {
+      "position": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1. (https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv); catalogue reference lvdb-v1.1.1:ngc_0300:location",
+      "distance": "Tully2009AJ....138..323T: The Extragalactic Distance Database (https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T); catalogue reference Tully2009AJ....138..323T: 2089296.13085 pc (-56939.1199178/+58534.3432765); trgb",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD NGC 300: 146 km/s +/- 2, from 2012AJ....144....4M (https://ui.adsabs.harvard.edu/abs/2012AJ....144....4M/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/omega-centauri.json b/packages/astronomy/data/bodies/omega-centauri.json
new file mode 100644
index 00000000000..bdba7e7d75b
--- /dev/null
+++ b/packages/astronomy/data/bodies/omega-centauri.json
@@ -0,0 +1,28 @@
+{
+  "id": "omega-centauri",
+  "classification": "globular-cluster",
+  "order": 5151,
+  "physical": {
+    "name": "Omega Centauri",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Omega Centauri is recorded: it is an extended globular cluster, and its package frames it at 43.4 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 201.696958,
+    "declinationDegrees": -47.479539,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 5426,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 232.7,
+    "sources": {
+      "position": "ESO/INAF-VST/OmegaCAM eso1119b native TIFF and embedded AVM. The common observation-frame center is an adopted registration origin, not a new dynamical centroid measurement. (https://cdn.eso.org/images/original/eso1119b.tif); catalogue reference eso1119b-frame",
+      "distance": "Baumgardt & Vasiliev (2021), Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data, Table 2, NGC 5139: combined distance 5.426 +/- 0.047 kpc. Full downloaded paper bytes. (https://arxiv.org/pdf/2105.09526); catalogue reference baumgardt-vasiliev-2021: 5426 pc (-47/+47); Combined Gaia EDR3, HST and literature distance, Table 2, NGC 5139. One cluster scale; individual stellar distances are not recovered.",
+      "properMotion": "Zero: the globular cluster is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD NGC 5139: 232.7 km/s +/- 0.2, from 2018MNRAS.478.1520B (https://ui.adsabs.harvard.edu/abs/2018MNRAS.478.1520B/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/smc.json b/packages/astronomy/data/bodies/smc.json
new file mode 100644
index 00000000000..aa04a3a63be
--- /dev/null
+++ b/packages/astronomy/data/bodies/smc.json
@@ -0,0 +1,28 @@
+{
+  "id": "smc",
+  "classification": "galaxy",
+  "order": 5152,
+  "physical": {
+    "name": "SMC",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of SMC is recorded: it is an extended galaxy, and its package frames it at 4000 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 16.25,
+    "declinationDegrees": -72.42,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 62440,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 145.6,
+    "sources": {
+      "position": "Stanimirovic2004ApJ...604..176S: A New Look at the Kinematics of Neutral Hydrogen in the Small Magellanic Cloud (https://ui.adsabs.harvard.edu/abs/2004ApJ...604..176S); catalogue reference Stanimirovic2004ApJ...604..176S",
+      "distance": "Graczyk et al. (2020), ApJ904,13; DOI 10.3847/1538-4357/abbb2b (https://arxiv.org/abs/2010.08754); catalogue reference Graczyk2020ApJ...904...13G: 62440 pc; eclipsing-binaries",
+      "properMotion": "Zero: the galaxy is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "SIMBAD NAME SMC: 145.6 km/s +/- 0.6, from 2012AJ....144....4M (https://ui.adsabs.harvard.edu/abs/2012AJ....144....4M/abstract)"
+    }
+  }
+}
diff --git a/packages/astronomy/data/bodies/virgo-cluster.json b/packages/astronomy/data/bodies/virgo-cluster.json
new file mode 100644
index 00000000000..e494896e9de
--- /dev/null
+++ b/packages/astronomy/data/bodies/virgo-cluster.json
@@ -0,0 +1,28 @@
+{
+  "id": "virgo-cluster",
+  "classification": "galaxy-cluster",
+  "order": 5153,
+  "physical": {
+    "name": "Virgo Cluster",
+    "horizonsCode": null,
+    "meanRadiusKm": 0,
+    "gravitationalParameterKm3PerS2": 0,
+    "parent": null
+  },
+  "physicalNotes": "No radius or mass of Virgo Cluster is recorded: it is an extended cluster of galaxies, and its package frames it at 1625000 pc (object.json worldFrame.bodyRadiusM), a presentation value.",
+  "star": {
+    "rightAscensionDegrees": 187.697,
+    "declinationDegrees": 12.337,
+    "positionEpochJulianYear": 2000,
+    "distanceParsecs": 16203170.427400004,
+    "properMotionRaMasPerYear": 0,
+    "properMotionDecMasPerYear": 0,
+    "radialVelocityKmPerS": 1079.3,
+    "sources": {
+      "position": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe (https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz); catalogue reference mcxc-ii:MCXC J1230.7+1220",
+      "distance": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table (https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94); catalogue reference cosmicflows-4:41220: 16203170.427400004 pc; Cosmicflows-4 group distance: the weighted average of its members' distance moduli on the calibrated scale (table 3, DMzp).",
+      "properMotion": "Zero: the cluster of galaxies is held at its catalogued position; no motion across the sky is applied.",
+      "radialVelocity": "c z for the catalogued redshift z = 0.0036: Redshift reference 1995ApJ...446....1S, transcribed from MCXC-II. (https://ui.adsabs.harvard.edu/abs/1995ApJ...446....1S); catalogue reference 1995ApJ...446....1S"
+    }
+  }
+}
diff --git a/packages/astronomy/src/bodies.test.ts b/packages/astronomy/src/bodies.test.ts
index ca458480328..3d426ab2a09 100644
--- a/packages/astronomy/src/bodies.test.ts
+++ b/packages/astronomy/src/bodies.test.ts
@@ -10,6 +10,10 @@ import {
   COMET_IDS,
   EXOPLANET_IDS,
   BLACK_HOLE_IDS,
+  GALAXY_IDS,
+  GALAXY_CLUSTER_IDS,
+  NEBULA_IDS,
+  GLOBULAR_CLUSTER_IDS,
   PLANET_IDS,
   bodyData,
   moonsOf,
@@ -26,6 +30,8 @@ const HOSTED_STAR_IDS = HOSTED_PLANET_IDS.filter(id => !(EXOPLANET_IDS as readon
 
 const GRAVITATIONAL_CONSTANT_KM3_PER_KG_S2 = 6.6743e-20
 
+const EXTENDED_IDS: readonly string[] = [...GALAXY_IDS, ...GALAXY_CLUSTER_IDS, ...NEBULA_IDS, ...GLOBULAR_CLUSTER_IDS]
+
 describe('the body table', () => {
   it('has an entry for the Sun, eight planets, the Moon, every satellite, the five dwarf planets, every placed star, black hole and hosted star, and every exoplanet', () => {
     assert.equal(BODY_IDS.length, 1 + 8 + 1 + SATELLITE_IDS.length + SCENE_SATELLITE_IDS.length + DWARF_PLANET_IDS.length + SMALL_BODY_IDS.length + COMET_IDS.length + STAR_IDS.length + EXOPLANET_IDS.length + HOSTED_STAR_IDS.length)
@@ -65,6 +71,12 @@ describe('the body table', () => {
   it('has physically plausible radii and masses', () => {
     for (const id of BODY_IDS) {
       const data = bodyData(id)
+      // An extended body (a galaxy, a cluster of galaxies, a nebula, a globular cluster) has no radius or mass of a sphere.
+      if (EXTENDED_IDS.includes(id)) {
+        assert.equal(data.meanRadiusKm, 0, id)
+        assert.equal(data.gravitationalParameterKm3PerS2, 0, id)
+        continue
+      }
       // Zero radius is an unmeasured one, allowed only for a hosted star or black hole. Such a star has no published mass either;
       // a hosted black hole's mass is what its orbit measures.
       if (data.meanRadiusKm === 0) {
diff --git a/packages/astronomy/src/bodies.ts b/packages/astronomy/src/bodies.ts
index 5304b4cc3a5..d51991f7b4c 100644
--- a/packages/astronomy/src/bodies.ts
+++ b/packages/astronomy/src/bodies.ts
@@ -1,6 +1,6 @@
 import { PLANET_IDS } from './body-types.js'
 import type { BodyId, BodyData, PlanetId } from './body-types.js'
-export { PLANET_IDS, DWARF_PLANET_IDS, ASTEROID_IDS, TRANS_NEPTUNIAN_IDS, SMALL_BODY_IDS, COMET_IDS, INTERSTELLAR_IDS, EXOPLANET_IDS, BLACK_HOLE_IDS } from './body-types.js'
+export { PLANET_IDS, DWARF_PLANET_IDS, ASTEROID_IDS, TRANS_NEPTUNIAN_IDS, SMALL_BODY_IDS, COMET_IDS, INTERSTELLAR_IDS, EXOPLANET_IDS, BLACK_HOLE_IDS, GALAXY_IDS, GALAXY_CLUSTER_IDS, NEBULA_IDS, GLOBULAR_CLUSTER_IDS } from './body-types.js'
 export type { BodyData, PlanetId, DwarfPlanetId, AsteroidId, TransNeptunianId, SmallBodyId, BodyId, CometId, InterstellarId, ExoplanetId } from './body-types.js'
 import { BODIES } from './body-data.js'
 export { BODIES } from './body-data.js'
diff --git a/packages/astronomy/src/body-types.ts b/packages/astronomy/src/body-types.ts
index dca4275c036..a5990154016 100644
--- a/packages/astronomy/src/body-types.ts
+++ b/packages/astronomy/src/body-types.ts
@@ -1,5 +1,5 @@
-import { BODY_IDS, PLANET_IDS, DWARF_PLANET_IDS, ASTEROID_IDS, TRANS_NEPTUNIAN_IDS, INTERSTELLAR_IDS, COMET_IDS, EXOPLANET_IDS, BLACK_HOLE_IDS } from './data/generated/bodies.js'
-export { PLANET_IDS, DWARF_PLANET_IDS, ASTEROID_IDS, TRANS_NEPTUNIAN_IDS, INTERSTELLAR_IDS, COMET_IDS, EXOPLANET_IDS, BLACK_HOLE_IDS }
+import { BODY_IDS, PLANET_IDS, DWARF_PLANET_IDS, ASTEROID_IDS, TRANS_NEPTUNIAN_IDS, INTERSTELLAR_IDS, COMET_IDS, EXOPLANET_IDS, BLACK_HOLE_IDS, GALAXY_IDS, GALAXY_CLUSTER_IDS, NEBULA_IDS, GLOBULAR_CLUSTER_IDS } from './data/generated/bodies.js'
+export { PLANET_IDS, DWARF_PLANET_IDS, ASTEROID_IDS, TRANS_NEPTUNIAN_IDS, INTERSTELLAR_IDS, COMET_IDS, EXOPLANET_IDS, BLACK_HOLE_IDS, GALAXY_IDS, GALAXY_CLUSTER_IDS, NEBULA_IDS, GLOBULAR_CLUSTER_IDS }
 export interface BodyData {
   readonly id: BodyId
   readonly name: string
diff --git a/packages/bake/AGENTS.md b/packages/bake/AGENTS.md
index 1f22cee15ba..4b3038d3eaa 100644
--- a/packages/bake/AGENTS.md
+++ b/packages/bake/AGENTS.md
@@ -106,8 +106,8 @@ its validators accept); the renderer never imports the bake.
   package (`loadAstronomyPackage`), which finds the build through this package's own name so the path holds from `dist/`.
   It imports no topic. `packages/bake/cli/prepare-solar-geometry.mts` generates `src/platform/solar-geometry.mts` from it;
   its test is `src/platform/solar-geometry.test.mts`.
-- `src/navigation/` is published as `@cssearth/bake/navigation` (Node only): the prepared focus objects and scene distances
-  the catalogue and search destinations are built from, and the marker recipes whose source bytes are checked and drawn
+- `src/navigation/` is published as `@cssearth/bake/navigation` (Node only): the navigation distances
+  the catalogue and search destinations are built with, and the marker recipes whose source bytes are checked and drawn
   into navigation marker sprites, and the navigation preparation (`prepare-navigation.ts`, with the Sun, black-hole,
   supernova and action marker sources in `marker-descriptors.ts`) that writes the marker atlases, action markers and
   `site/prepared-navigation-markers.mjs`, and the flat neutral disc (`neutral-disc-marker.ts`) that marks an unresolved,
diff --git a/packages/bake/authoring/fornax-cluster/members.mts b/packages/bake/authoring/fornax-cluster/members.mts
index 79c4c1e5474..2c50663effe 100644
--- a/packages/bake/authoring/fornax-cluster/members.mts
+++ b/packages/bake/authoring/fornax-cluster/members.mts
@@ -15,7 +15,7 @@
  * Inputs: FCC p2tbl2, by default `output/clusters/fcc-p2tbl2.dat.gz`, from
  * https://cdsarc.cds.unistra.fr/ftp/VII/180/p2tbl2.dat.gz (byte columns from its ReadMe), and the tracked
  * `src/objects/nearby-universe/source/galaxies/cf4-hyperleda.csv.gz`.
- * Output: `src/objects/fornax-cluster/source/dots/fcc-members.csv.gz`. It prints what it kept.
+ * Output: `src/objects/fornax-cluster-members/source/dots/fcc-members.csv.gz`. It prints what it kept.
  */
 import { spawnSync } from 'node:child_process';
 import { mkdir, readFile, writeFile } from 'node:fs/promises';
@@ -25,7 +25,7 @@ import { gunzipSync, gzipSync } from 'node:zlib';
 const repository = resolve(import.meta.dirname, '../../../..');
 const fccPath = resolve(process.argv[2] ?? resolve(repository, 'output/clusters/fcc-p2tbl2.dat.gz'));
 const fieldPath = resolve(repository, 'src/objects/nearby-universe/source/galaxies/cf4-hyperleda.csv.gz');
-const outputPath = resolve(repository, 'src/objects/fornax-cluster/source/dots/fcc-members.csv.gz');
+const outputPath = resolve(repository, 'src/objects/fornax-cluster-members/source/dots/fcc-members.csv.gz');
 const FORNAX_GROUP = '13418', MATCH_ARCSEC = 10;
 
 const stage = (type: string): string => {
diff --git a/packages/bake/authoring/m31/compose-optical.mts b/packages/bake/authoring/m31/compose-optical.mts
index ec9123d835e..411ad693a56 100644
--- a/packages/bake/authoring/m31/compose-optical.mts
+++ b/packages/bake/authoring/m31/compose-optical.mts
@@ -13,7 +13,7 @@ import { readFile, writeFile } from 'node:fs/promises';
 import { resolve } from 'node:path';
 import { parseImageLayerRecipe, imageLayerView } from '@cssearth/bake/image-layers';
 
-const sourceDirectory = resolve(import.meta.dirname, '../../../../src/objects/m31/source');
+const sourceDirectory = resolve(import.meta.dirname, '../../../../src/objects/m31-layers/source');
 const recipe = JSON.parse(await readFile(resolve(sourceDirectory, 'recipe.json'), 'utf8'));
 const composition = recipe.composition as {
   frame: { centerRaDeg: number; centerDecDeg: number; fieldOfViewDeg: [number, number]; northClockwiseDeg: number; arcsecPerPixel: number };
@@ -21,7 +21,7 @@ const composition = recipe.composition as {
   fill: { path: string; dimensions: [number, number]; originalDimensions: [number, number]; parentPixelWindow: [number, number, number, number];
     observation: { centerRaDeg: number; centerDecDeg: number; fieldOfViewDeg: [number, number]; northClockwiseDeg: number } };
   featherArcsec: number; noDataLevel: number };
-if (!composition) throw new TypeError('src/objects/m31/source/recipe.json has no "composition" block.');
+if (!composition) throw new TypeError('src/objects/m31-layers/source/recipe.json has no "composition" block.');
 sharp.cache(false);
 const { frame, survey, fill } = composition;
 const width = Math.round(frame.fieldOfViewDeg[0] * 3600 / frame.arcsecPerPixel), height = Math.round(frame.fieldOfViewDeg[1] * 3600 / frame.arcsecPerPixel);
diff --git a/packages/bake/authoring/virgo-cluster/members.mts b/packages/bake/authoring/virgo-cluster/members.mts
index 5fb314f73e4..a20f40b9b53 100644
--- a/packages/bake/authoring/virgo-cluster/members.mts
+++ b/packages/bake/authoring/virgo-cluster/members.mts
@@ -14,7 +14,7 @@
  * Inputs: EVCC table 2, by default `output/clusters/evcc-table2.dat`, from
  * https://cdsarc.cds.unistra.fr/ftp/J/ApJS/215/22/table2.dat (byte columns from its ReadMe), and the tracked
  * `src/objects/nearby-universe/source/galaxies/cf4-hyperleda.csv.gz`.
- * Output: `src/objects/virgo-cluster/source/dots/evcc-members.csv.gz`. It prints what it kept.
+ * Output: `src/objects/virgo-cluster-members/source/dots/evcc-members.csv.gz`. It prints what it kept.
  */
 import { mkdir, readFile, writeFile } from 'node:fs/promises';
 import { dirname, resolve } from 'node:path';
@@ -23,7 +23,7 @@ import { gunzipSync, gzipSync } from 'node:zlib';
 const repository = resolve(import.meta.dirname, '../../../..');
 const evccPath = resolve(process.argv[2] ?? resolve(repository, 'output/clusters/evcc-table2.dat'));
 const fieldPath = resolve(repository, 'src/objects/nearby-universe/source/galaxies/cf4-hyperleda.csv.gz');
-const outputPath = resolve(repository, 'src/objects/virgo-cluster/source/dots/evcc-members.csv.gz');
+const outputPath = resolve(repository, 'src/objects/virgo-cluster-members/source/dots/evcc-members.csv.gz');
 const VIRGO_GROUP = '41220', MATCH_ARCSEC = 10;
 
 // EVCC table 2 byte columns (ReadMe): 1-4 EVCC, 17-24 RAdeg, 26-32 DEdeg, 74 MmI, 90-92 TT1, 126-130 gmag, 138-142 rmag.
diff --git a/packages/bake/cli/prepare-solar-geometry.mts b/packages/bake/cli/prepare-solar-geometry.mts
index d1f3e4b1f08..2c2d7bc1ab1 100644
--- a/packages/bake/cli/prepare-solar-geometry.mts
+++ b/packages/bake/cli/prepare-solar-geometry.mts
@@ -32,6 +32,7 @@ import { resolve } from "node:path";
 import { loadAstronomyPackage } from "@cssearth/bake/astronomy";
 import { loadSceneEpochEphemeris } from "../../astronomy/cli/scene-ephemeris.mts";
 import { readPreparedObjects } from "@cssearth/objects/node";
+import { isPlacedClassification } from "@cssearth/objects";
 
 /** Write src/platform/solar-geometry.mts for the registered bodies at the pinned scene epoch and print each body's geometry. */
 export async function prepareSolarGeometry() {
@@ -60,9 +61,9 @@ export async function prepareSolarGeometry() {
   const isPlacedStar = (id: string) => isIncluded(STAR_IDS, id);
   // A planet of another star orbits a placed star on its transit-fitted orbit; its host is its light source.
   const isHostedPlanet = (id: string) => isIncluded(HOSTED_PLANET_IDS, id);
-  const PACKAGED = readPreparedObjects(resolve(import.meta.dirname, "../../..")).sceneObjects.filter(body =>
+  const PACKAGED = readPreparedObjects(resolve(import.meta.dirname, "../../..")).worldObjects.filter(body =>
     ["planet", "dwarf-planet", "satellite", "asteroid", "trans-neptunian", "comet", "interstellar", "exoplanet"].includes(body.classification) ||
-    ((body.classification === "star" || body.classification === "black-hole") && (isPlacedStar(body.id) || isHostedPlanet(body.id)))).map(body => {
+    (isPlacedClassification(body.classification) && (isPlacedStar(body.id) || isHostedPlanet(body.id)))).map(body => {
     if (!Object.hasOwn(ASTRONOMY_BODY_DATA, body.id)) throw new TypeError(`Unknown astronomy body: ${body.id}.`);
     return body.id as BodyId;
   });
@@ -122,7 +123,9 @@ export async function prepareSolarGeometry() {
   const authoredRotations = new Map(await Promise.all(BODIES.map(async (id): Promise<readonly [BodyId, RotationElements | null]> => {
     if (RECORD_ONLY_HOSTED.includes(id)) return [id, recordOnlyRotation(id)];
     const descriptor = requireRecord(await readJsonSource(resolve("src/objects", id, "object.json")));
-    const recipe = requireRecord(requireRecord(descriptor.properties).recipe);
+    // No surface (a galaxy, a nebula, a cluster, the Local Group level) means nothing rotates: the body-fixed frame is the ICRF.
+    const authored = requireRecord(descriptor.properties).recipe, recipe = authored === undefined ? null : requireRecord(authored);
+    if (!recipe || !requireArray(recipe.surfaces).length) return [id, { poleRightAscensionRad: 0, poleDeclinationRad: Math.PI / 2, primeMeridianRad: 0, spinRateRadPerDay: 0 }];
     const ref = requireArray(recipe.sources).map(source => requireRecord(source)).find(source => source.id === "rotation");
     if (!ref) return [id, null];
     const { readAuthoredRotation } = await import('@cssearth/bake/objects/scene');
@@ -226,7 +229,7 @@ export async function prepareSolarGeometry() {
     const angularMomentum = cross(orbitPositionAu, velocityAuPerDay);
     const radialOnly = star && Math.hypot(...angularMomentum) <= 1e-12 * Math.hypot(...orbitPositionAu) * Math.hypot(...velocityAuPerDay);
     const orbitNormalIcrf = normalize(radialOnly ? cross(orbitPositionAu, ECLIPTIC_NORTH_ICRF) : angularMomentum);
-    const velocityIcrf = normalize(velocityAuPerDay);
+    const velocityIcrf = normalize(Math.hypot(...velocityAuPerDay) > 0 ? velocityAuPerDay : orbitPositionAu); // A placed body held still has no velocity direction: its line of sight stands in, and nothing draws its path.
     // Columns of bodyFixedToIcrf are the body axes in ICRF, so its transpose
     // takes an ICRF direction into the body-fixed frame.
     const matrix = bodyFixedToIcrf(rotationAtEpoch(body));
diff --git a/packages/bake/src/contract/object-runtime.test.mts b/packages/bake/src/contract/object-runtime.test.mts
index 7457b87b3a9..91a856e9888 100644
--- a/packages/bake/src/contract/object-runtime.test.mts
+++ b/packages/bake/src/contract/object-runtime.test.mts
@@ -101,7 +101,7 @@ function harness(options: HarnessOptions = {}, overrides: Partial<RuntimeService
         const state = (): ReturnType<Orbit["state"]> => ({ ...publication,
           distance: 12345000, distanceKilometers: 12345, distanceRadii: 12345000, focal: 1000, projectionScale: 1, principalOffset: [0,0], visibleRect: null, offAxisDegrees: null, silhouetteRadius: null,
           levelOfDetail: { stage: 'geometry', silhouetteDiameter: 400, billboardOpacity: 0, markerOpacity: 0, proxyOpacity: 0 }, pitch: publication.controlPitch, pose: { schema: "cssearth-camera-pose@2" as const, scene: matrix } });
-        return { publicationState: () => ({ requestedRevision: 0, presentedRevision: 0, presentedWorld: null }), mobilePageFlow: () => false, initialResponsiveZoom: () => definition.camera.defaultZoom, currentResponsiveZoom: () => definition.camera.defaultZoom, setZoomOutCentering() {}, preparedFocus: () => null, setPreparedFocus() { throw new Error("Focus changes are outside this mount fixture."); }, async flyToPreparedFocus() { throw new Error("Focus flights are outside this mount fixture."); }, captureWorldCamera() { throw new Error("unused"); }, applyWorldCamera() {}, rebaseScene() {}, flyToState: async (...args: Parameters<Orbit["flyToState"]>) => { flights.push(args); return { completed: true }; }, invalidate: () => orbitConfiguration.onPublish?.(publication), refresh: () => orbitConfiguration.onPublish?.(publication), setState: (value: Parameters<Orbit["setState"]>[0]) => { events.push("camera:reset"); Object.assign(publication, value); return state(); }, state, sharedState: () => ({ distanceKilometers: 12345, pose: { schema: "cssearth-camera-pose@2", scene: matrix } }), skyState: () => ({ sunViewDirection: null, sunVisible: false, sunClassification: "absent" }), stats: (): never => { throw new Error("Orbit stats are outside this mount harness."); }, destroy() { events.push("remove:orbit"); } } satisfies Orbit;
+        return { publicationState: () => ({ requestedRevision: 0, presentedRevision: 0, presentedWorld: null }), mobilePageFlow: () => false, initialResponsiveZoom: () => definition.camera.defaultZoom, currentResponsiveZoom: () => definition.camera.defaultZoom, setZoomOutCentering() {}, captureWorldCamera() { throw new Error("unused"); }, applyWorldCamera() {}, rebaseScene() {}, flyToState: async (...args: Parameters<Orbit["flyToState"]>) => { flights.push(args); return { completed: true }; }, invalidate: () => orbitConfiguration.onPublish?.(publication), refresh: () => orbitConfiguration.onPublish?.(publication), setState: (value: Parameters<Orbit["setState"]>[0]) => { events.push("camera:reset"); Object.assign(publication, value); return state(); }, state, sharedState: () => ({ distanceKilometers: 12345, pose: { schema: "cssearth-camera-pose@2", scene: matrix } }), skyState: () => ({ sunViewDirection: null, sunVisible: false, sunClassification: "absent" }), stats: (): never => { throw new Error("Orbit stats are outside this mount harness."); }, destroy() { events.push("remove:orbit"); } } satisfies Orbit;
       },
       waitDocument: () => Promise.resolve(), waitPaint: () => Promise.resolve(), ...overrides,
     });
diff --git a/packages/bake/src/navigation/navigation-destinations.ts b/packages/bake/src/navigation/navigation-destinations.ts
index 2240d8d6178..84db0629a29 100644
--- a/packages/bake/src/navigation/navigation-destinations.ts
+++ b/packages/bake/src/navigation/navigation-destinations.ts
@@ -1,11 +1,5 @@
-import { readFile, readdir } from 'node:fs/promises';
-import { resolve } from 'node:path';
-import { catalogueClassification, parsePreparedGalaxyCatalog } from '@cssearth/catalog';
-import { parsePreparedClusterCatalog, isPreparedCluster, isNavigableCatalogObject } from '@cssearth/catalog';
-import { parsePreparedNebulaCatalog, isPreparedNebula } from '@cssearth/catalog';
-import type { PreparedCatalogObject } from '@cssearth/catalog';
-import { defineObjects, definePreparedFocus, normalizeDestinationQuery, parseNavigationDistance } from '@cssearth/objects';
-import { isRecord, hasErrorCode } from '@cssearth/core';
+import { isExtendedClassification, parseNavigationDistance } from '@cssearth/objects';
+import { isRecord } from '@cssearth/core';
 
 const AU_M = 149597870700, PC_M = 3.085677581491367e16;
 /** One tenth of a parsec, about 20,000 AU: the far edge of the Oort cloud. */
@@ -17,50 +11,15 @@ export function prepareSceneDistance(descriptor: unknown) {
     throw new TypeError('Navigation distance requires a prepared Sun-centred world frame.');
   }
   const meters = Math.hypot(...frame.originM);
+  // A galaxy, a cluster or a nebula, or a level that is a body too, sits where its catalogued distance puts it: that distance
+  // has no epoch, and may be another subject's (a reflection nebula placed at its star cluster's).
+  const catalog = isRecord(descriptor) && isRecord(descriptor.properties) ? descriptor.properties.catalog : null;
+  const extended = isRecord(catalog) && typeof catalog.classification === 'string' && isExtendedClassification(catalog.classification);
+  if (extended || (isRecord(descriptor) && isRecord(descriptor.properties) && descriptor.properties.overview !== undefined)) {
+    const subject = isRecord(catalog) ? catalog.distanceSubject : undefined;
+    return parseNavigationDistance({ ...(subject === undefined ? {} : { subject }), meters, value: meters / PC_M, unit: 'pc', quantity: 'catalogue', referencePoint: 'observer', epochJdTt: null });
+  }
   // A body beyond the Solar System is read in parsecs; astronomical units stop meaning anything past the Oort cloud.
   const parsecs = meters >= PARSEC_THRESHOLD_M;
   return parseNavigationDistance({ meters, value: meters / (parsecs ? PC_M : AU_M), unit: parsecs ? 'pc' : 'AU', quantity: 'geometric', referencePoint: 'heliocentre', epochJdTt: frame.epochJdTt });
 }
-
-export function prepareFocusObject(object: PreparedCatalogObject, sceneHostId: string) {
-  const classification = catalogueClassification(object);
-  return definePreparedFocus({ kind: 'prepared-focus', id: object.id, focusId: object.id, name: object.name,
-    searchNames: [...new Set([object.id, object.name, ...object.aliases].flatMap(name => {
-      const normalized = normalizeDestinationQuery(name);
-      return [normalized, normalized.replaceAll(' ', '')];
-    }))], classification,
-    systemName: isPreparedNebula(object) ? 'Milky Way' : isPreparedCluster(object) ? 'Galaxy clusters'
-      : object.membership.group === 'local-group' ? 'Local Group' : 'Galaxy catalogue',
-    sceneHostId, route: `/${object.id}/`,
-    distance: { ...(object.distance.subject ? { subject: object.distance.subject } : {}), meters: object.distance.valuePc * PC_M, value: object.distance.valuePc, unit: 'pc',
-      quantity: 'catalogue', referencePoint: 'observer', epochJdTt: null } });
-}
-
-/** Every row of every spatial catalogue (galaxies, clusters, nebulae), in folder order. */
-export async function readPreparedCatalogObjects(objectsDirectory: string) {
-  const read = async (path: string): Promise<unknown> => JSON.parse(await readFile(path, 'utf8'));
-  const objects: PreparedCatalogObject[] = [];
-  // Every folder's two catalogue files, read in parallel and parsed below in folder order.
-  const names = (await readdir(objectsDirectory, { withFileTypes: true })).filter(entry => entry.isDirectory()).map(entry => entry.name);
-  const files = await Promise.all(names.flatMap(name => ['prepared/catalogue.json', 'source/nebula.json'].map(async path => {
-    try { return { path, value: await read(resolve(objectsDirectory, name, path)) }; }
-    catch (error) { if (hasErrorCode(error, 'ENOENT')) return null; throw error; }
-  })));
-  for (const file of files) {
-    if (file === null) continue;
-    const { path, value } = file;
-    if (!isRecord(value)) throw new TypeError('Invalid spatial catalogue.');
-    if (value.schema === 'cssearth-galaxy-catalog@1') objects.push(...parsePreparedGalaxyCatalog(value).objects);
-    else if (value.schema === 'cssearth-cluster-catalog@1') objects.push(...parsePreparedClusterCatalog(value).objects);
-    else if (path === 'source/nebula.json') objects.push(...parsePreparedNebulaCatalog(value).objects);
-  }
-  return objects;
-}
-
-/** Source catalogues own identity. Rendering-resource descriptors do not add destinations. */
-export async function readPreparedFocusObjects(objectsDirectory: string, sceneHostId: string, objects?: readonly PreparedCatalogObject[]) {
-  objects ??= await readPreparedCatalogObjects(objectsDirectory);
-  // Only a subject the application can open has a page (isNavigableCatalogObject); the rest stay labels.
-  const destinations = objects.filter(isNavigableCatalogObject).map(object => prepareFocusObject(object, sceneHostId)).sort((a, b) => a.id.localeCompare(b.id, 'en'));
-  return destinations.length ? defineObjects(destinations) : Object.freeze(destinations);
-}
diff --git a/packages/bake/src/nebula/objects.test.ts b/packages/bake/src/nebula/objects.test.ts
index 5a8ad760f7d..793df8d64a0 100644
--- a/packages/bake/src/nebula/objects.test.ts
+++ b/packages/bake/src/nebula/objects.test.ts
@@ -16,25 +16,25 @@ import { validatePreparedVolumeDatasets } from '@cssearth/renderer/volume/prepar
 const root = projectRoot(import.meta.url);
 
 test('sanitizeVolumeProvenance replaces the process-pid staging directory with a stable placeholder', () => {
-  const volume = { provenance: { layout: 'x', sourceVolume: { path: 'src/objects/m1/.prepared-59471/compact/hubble-optical/datasets/hubble-optical/volume.json' } } };
+  const volume = { provenance: { layout: 'x', sourceVolume: { path: 'src/objects/m1-volume/.prepared-59471/compact/hubble-optical/datasets/hubble-optical/volume.json' } } };
   const sanitized = sanitizeVolumeProvenance(volume);
   assert.equal(sanitized.provenance.sourceVolume.path,
-    'src/objects/m1/.prepared-compact/compact/hubble-optical/datasets/hubble-optical/volume.json');
+    'src/objects/m1-volume/.prepared-compact/compact/hubble-optical/datasets/hubble-optical/volume.json');
   assert.doesNotMatch(sanitized.provenance.sourceVolume.path, /\.prepared-\d+/);
   // A different process's bake must record the identical, pid-independent path.
-  const otherPid = { provenance: { layout: 'x', sourceVolume: { path: 'src/objects/m1/.prepared-1/compact/hubble-optical/datasets/hubble-optical/volume.json' } } };
+  const otherPid = { provenance: { layout: 'x', sourceVolume: { path: 'src/objects/m1-volume/.prepared-1/compact/hubble-optical/datasets/hubble-optical/volume.json' } } };
   assert.deepEqual(sanitizeVolumeProvenance(otherPid), sanitized);
 });
 
 test('sanitizeVolumeProvenance leaves provenance without a staging path untouched', () => {
   const noProvenance = { provenance: null };
   assert.equal(sanitizeVolumeProvenance(noProvenance), noProvenance);
-  const stablePath = { provenance: { sourceVolume: { path: 'src/objects/m1/prepared/hubble-optical/volume.json' } } };
+  const stablePath = { provenance: { sourceVolume: { path: 'src/objects/m1-volume/prepared/hubble-optical/volume.json' } } };
   assert.equal(sanitizeVolumeProvenance(stablePath), stablePath);
   const noSourceVolume = { provenance: { layout: 'x' } };
   assert.equal(sanitizeVolumeProvenance(noSourceVolume), noSourceVolume);
   // Only a whole `.prepared-<pid>` path segment is the staging directory.
-  const lookalike = { provenance: { sourceVolume: { path: 'src/objects/m1/data.prepared-7/volume.json' } } };
+  const lookalike = { provenance: { sourceVolume: { path: 'src/objects/m1-volume/data.prepared-7/volume.json' } } };
   assert.equal(sanitizeVolumeProvenance(lookalike), lookalike);
 });
 
@@ -59,7 +59,7 @@ test('every volume the nebula delivery validates is sanitized, and an explicit b
 });
 
 test('a prepared m1 dataset bank, if baked locally, records no process-pid staging directory', async () => {
-  const path = resolve(root, 'src/objects/m1/prepared/datasets.json');
+  const path = resolve(root, 'src/objects/m1-volume/prepared/datasets.json');
   let bytes: string;
   try { bytes = await readFile(path, 'utf8'); }
   catch (error) { if (error instanceof Error && 'code' in error && error.code === 'ENOENT') return; throw error; }
diff --git a/packages/bake/src/nebula/objects.ts b/packages/bake/src/nebula/objects.ts
index 721a906405a..3e3d8517596 100644
--- a/packages/bake/src/nebula/objects.ts
+++ b/packages/bake/src/nebula/objects.ts
@@ -102,7 +102,8 @@ export async function prepareNebulaObject(root: string, directory: string, ifMis
   if (catalogueBytes === null && recipe.attachedTo === undefined) throw new TypeError('A nebula delivery without a catalogue entry names the body it attaches to.');
   if (catalogueBytes !== null) {
     const catalogue = parsePreparedNebulaCatalog(JSON.parse(catalogueBytes.toString()) as unknown);
-    if (catalogue.objects.length !== 1 || catalogue.objects[0]!.id !== recipe.id ||
+    // The catalogue row names the nebula; the package it details to is this delivery's bank.
+    if (catalogue.objects.length !== 1 || catalogue.objects[0]!.detailedObjectId !== recipe.id ||
         catalogue.objects[0]!.distance.valuePc !== recipe.sky.distancePc ||
         catalogue.objects[0]!.skyPosition.raDeg !== recipe.sky.centerIcrsDegrees[0] ||
         catalogue.objects[0]!.skyPosition.decDeg !== recipe.sky.centerIcrsDegrees[1]) throw new TypeError('Nebula catalogue and delivery identity/sky frame differ.');
diff --git a/packages/bake/src/objects/lineage/lineage-recipes.ts b/packages/bake/src/objects/lineage/lineage-recipes.ts
index 7a1c23d0dcb..5392f5a809c 100644
--- a/packages/bake/src/objects/lineage/lineage-recipes.ts
+++ b/packages/bake/src/objects/lineage/lineage-recipes.ts
@@ -177,7 +177,8 @@ export function lineageProducts({ id, recipes, inputs, paths: declared, controls
   // turns on a volume another package prepares. Its parent is that dataset; the cloud's own sources are that package's.
   for (const dataset of controls) {
     const volume = maybeRecord(dataset.volume);
-    if (volume && !products.some(product => product.id === dataset.id)) add(dataset.id, [], { parents: [text(volume.surface)], interpretation: kind('companion-volume') });
+    // On an object with no surface the dataset is the companion alone: it borrows no surface, so it has no parent.
+    if (volume && !products.some(product => product.id === dataset.id)) add(dataset.id, [], { parents: volume.surface === dataset.id ? [] : [text(volume.surface)], interpretation: kind('companion-volume') });
   }
   const content = recipes.get('content');
   if (content) add('content', [content.path.replace(/^source\//u, '')], { label: 'Object information', datasetIds: [] });
diff --git a/packages/bake/src/objects/sources/authored-sources.ts b/packages/bake/src/objects/sources/authored-sources.ts
index 6ae87c99756..ea814cca9ed 100644
--- a/packages/bake/src/objects/sources/authored-sources.ts
+++ b/packages/bake/src/objects/sources/authored-sources.ts
@@ -41,7 +41,9 @@ export async function verifiedSource(objectDirectory: string, manifest: Authored
 /** The authored descriptor, its manifest, and every recipe source verified against the manifest. */
 export async function readAuthoredSources(objectDirectory: string, descriptorValue?: unknown): Promise<AuthoredSources> {
   const descriptor = parseAuthoredObjectDescriptor(descriptorValue ?? JSON.parse(await readFile(resolve(objectDirectory, 'object.json'), 'utf8')) as unknown);
-  const manifest = await createSourceManifest({ objectId: descriptor.id, objectName: descriptor.id, sourceRoot: resolve(objectDirectory, 'source') });
+  // A surface is prepared from input files; an object with no surface may record none (its datasets' inputs are their banks').
+  const manifest = await createSourceManifest({ objectId: descriptor.id, objectName: descriptor.id, sourceRoot: resolve(objectDirectory, 'source'),
+    inputs: descriptor.recipe.surfaces.length ? 'required' : 'optional' });
   const entries = await Promise.all(descriptor.recipe.sources.map(reference => verifiedSource(objectDirectory, manifest, reference)));
   return Object.freeze({ descriptor, manifest, entries, sources: new Map(entries.map(entry => [entry.reference.id, entry])) });
 }
diff --git a/packages/bake/src/site-assets/prepare-search-thumbnails.ts b/packages/bake/src/site-assets/prepare-search-thumbnails.ts
index 3646c94ff6e..284f46748cc 100644
--- a/packages/bake/src/site-assets/prepare-search-thumbnails.ts
+++ b/packages/bake/src/site-assets/prepare-search-thumbnails.ts
@@ -82,7 +82,6 @@ async function featuredStarPreviews(projectRoot: string): Promise<ReadonlyMap<st
   const previews = new Map<string, string>();
   for (const entry of module.CATALOGUE_ENTRIES) {
     if (!isRecord(entry)) throw new TypeError('Invalid prepared catalogue entry.');
-    if (entry.kind !== 'scene') continue;
     if (!isRecord(entry.descriptor) || !isRecord(entry.descriptor.properties) || !isRecord(entry.descriptor.properties.catalog))
       throw new TypeError('Invalid scene catalogue descriptor.');
     if (entry.descriptor.properties.catalog.classification !== 'star') continue;
diff --git a/packages/bake/src/sources/context-source-records.ts b/packages/bake/src/sources/context-source-records.ts
index 7bebe4a6d71..d5ba486c92f 100644
--- a/packages/bake/src/sources/context-source-records.ts
+++ b/packages/bake/src/sources/context-source-records.ts
@@ -3,7 +3,7 @@ import { resolve } from 'node:path';
 import { hasErrorCode } from '@cssearth/core';
 import { checkLineage, lineageSource } from '@cssearth/objects/provenance';
 import type { LineageSource, ObjectLineage } from '@cssearth/objects/provenance';
-import { sourceArray, sourceObject, sourceText } from '@cssearth/objects/sources';
+import { sourceArray, sourceId, sourceObject, sourceText } from '@cssearth/objects/sources';
 
 /** Every record a context or image-layer manifest lists: its inputs, documents and generated intermediates. */
 export function manifestSources(manifest: Record<string, unknown>): LineageSource[] {
@@ -36,7 +36,10 @@ export async function contextLineages({ route, root = process.cwd(), input = (pa
         interpretation: { ...(typeof interpretation.kind === 'string' ? { kind: interpretation.kind } : {}),
           ...(typeof interpretation.sourceKind === 'string' ? { sourceKind: interpretation.sourceKind } : {}) } };
     });
-    results.push({ id, name: sourceText(presentation.name), route, base, controls: [],
+    // A bank that names its host object (`properties.host` in its descriptor) is seen on that object's page.
+    const descriptor = sourceObject(JSON.parse((await input(`${base}/object.json`)).toString()));
+    const properties = sourceObject(descriptor.properties), host = properties.host === undefined ? undefined : sourceId(properties.host);
+    results.push({ id, name: sourceText(presentation.name), route: host === undefined ? route : `/${host}/`, base, controls: [],
       lineage: checkLineage({ objectId: id, manifestPath: 'source/manifest.json', sources: manifestSources(manifest), products }) });
   }
   return results;
diff --git a/packages/bake/src/volume/node/compiler/compiler-sampling.test.ts b/packages/bake/src/volume/node/compiler/compiler-sampling.test.ts
index 4c2e67a80a0..159c76173e2 100644
--- a/packages/bake/src/volume/node/compiler/compiler-sampling.test.ts
+++ b/packages/bake/src/volume/node/compiler/compiler-sampling.test.ts
@@ -32,7 +32,7 @@ test('the actual compiler default creates a bounded plan without an opt-in sampl
 });
 
 test('actual accepted M42 sampling bypasses optimization with its historical omission unchanged', async () => {
-  const compact = readCompactCompiler(JSON.parse(gunzipSync(await readFile(fileURLToPath(new URL('../../../../../../src/objects/m42/source/bake-inputs.json.gz', import.meta.url)))).toString()));
+  const compact = readCompactCompiler(JSON.parse(gunzipSync(await readFile(fileURLToPath(new URL('../../../../../../src/objects/m42-volume/source/bake-inputs.json.gz', import.meta.url)))).toString()));
   const saved = compact.scene.sampling, before = JSON.stringify(saved);
   assert.equal(saved.layerPlan, undefined);
   const forbidden = () => { throw new Error('Historical replay must not probe or replan the source field.'); };
diff --git a/packages/bake/src/world-context/spatial-context.ts b/packages/bake/src/world-context/spatial-context.ts
index 5bda9b4245f..acd267809e7 100644
--- a/packages/bake/src/world-context/spatial-context.ts
+++ b/packages/bake/src/world-context/spatial-context.ts
@@ -519,10 +519,10 @@ function validateState(state: OrbitalState, id: string, placed: boolean): void {
   identifier(state.centerBodyId, `${id} orbit parent`);
   [state.positionM, state.centerPositionM, state.normal, state.perihelionDirection].forEach((value, index) => { if (!Array.isArray(value) || value.length !== 3 || !value.every(Number.isFinite)) throw new TypeError(`${id} vector ${index} is invalid.`); });
   const axis = finite(state.semiMajorAxisM, `${id} semi-major axis`), eccentricity = state.eccentricity;
-  // Eccentricity 1 is a placed source moving straight along its line of sight (prepare-solar-geometry.mts): placed by its
-  // position, never drawn as a path.
+  // Eccentricity 1 is a placed source moving straight along its line of sight, or held still (prepare-solar-geometry.mts):
+  // placed by its position, never drawn as a path, and bound or unbound.
   if (!(Number.isFinite(eccentricity) && eccentricity >= 0 && (eccentricity !== 1 || placed) &&
-      (eccentricity < 1 ? axis > 0 : axis < 0)) || !Number.isFinite(state.trueAnomalyRadians) ||
+      (eccentricity < 1 ? axis > 0 : eccentricity === 1 ? axis !== 0 : axis < 0)) || !Number.isFinite(state.trueAnomalyRadians) ||
       1 + eccentricity * Math.cos(state.trueAnomalyRadians) <= 0 || Math.abs(dot(state.normal, state.perihelionDirection)) > 1e-8) {
     throw new TypeError(`${id} orbit is invalid.`);
   }
diff --git a/packages/objects/AGENTS.md b/packages/objects/AGENTS.md
index 888dc9c7ca2..8a5b3ed8988 100644
--- a/packages/objects/AGENTS.md
+++ b/packages/objects/AGENTS.md
@@ -19,7 +19,7 @@ An object type describes supported behavior and data, not an individual planet.
 Do not ship per-object configuration, generated payload modules, shell content, or renderer code here.
 Keep one shared object contract; application discovery remains in the existing registry.
 `src/registry/` holds that registry's shared contracts, exported from the main entry: the entry schema and catalogue
-decoding (`defineObjects`, `catalogEntry`, `catalogueObject`), the discovery, distance, arrival, prepared-focus and overview parsers, the classification
+decoding (`defineObjects`, `catalogEntry`, `catalogueObject`), the discovery, distance, arrival, overview-level and package-fact parsers, the classification
 categories, the fact order, the destination-name normalisation preparation and search share, the context colour and
 world-rotation validation. `site/objects.mts` stays the one `OBJECTS` registry: it binds these contracts to the shell's
 scene loader. The registry here never loads a scene, reads a file or lists an object. Preparation reads that same
diff --git a/packages/objects/src/authored.ts b/packages/objects/src/authored.ts
index fa2278afafb..7316495e1ea 100644
--- a/packages/objects/src/authored.ts
+++ b/packages/objects/src/authored.ts
@@ -1,5 +1,7 @@
 import type { ObjectDescriptor } from './descriptor.js';
 import { parseObjectDescriptor } from './parse.js';
+import { isRecord } from '@cssearth/core';
+import { isExtendedClassification } from './registry/object-schema.js';
 
 export type ShapeKind = 'sphere' | 'ellipsoid' | 'radial-terrain';
 /** A recipe input by id and package path. The source manifest declares the file once, never here. */
@@ -115,7 +117,8 @@ function parseMaterials(value: unknown, sourceIds: ReadonlySet<string>, frameIds
   unique(output.map(item => item.id), 'recipe.materials'); return freeze(output);
 }
 function parseSurfaces(value: unknown, sourceIds: ReadonlySet<string>, materialIds: ReadonlySet<string>, frameIds: ReadonlySet<string>): readonly SurfaceRecipe[] {
-  if (!Array.isArray(value) || !value.length) throw new TypeError('recipe.surfaces must be a nonempty array.');
+  // An object with no surface (a galaxy, a nebula, a cluster of galaxies) declares none: its datasets show companion banks.
+  if (!Array.isArray(value)) throw new TypeError('recipe.surfaces must be an array.');
   const output = value.map((item, index) => {
     const at = `recipe.surfaces[${index}]`, input = record(item, at); keys(input, ['id', 'source', 'projection', 'datasets'], at);
     if (input.projection !== 'equirectangular' && input.projection !== 'cubemap') throw new TypeError(`${at}.projection is not supported.`);
@@ -177,5 +180,10 @@ export function parseAuthoredObjectDescriptor(value: unknown): AuthoredObjectDes
   const descriptor = parseObjectDescriptor(value);
   const raw = descriptor.properties.recipe;
   if (raw === undefined) throw new TypeError('object.properties.recipe is required for authored objects.');
-  return freeze({ ...descriptor, recipe: parseAuthoredRecipe(raw) });
+  const recipe = parseAuthoredRecipe(raw), catalog = descriptor.properties.catalog;
+  // Only an object with no solid surface (a galaxy, a nebula, a cluster) may declare none: a body without surfaces is a mistake.
+  if (!recipe.surfaces.length && !(isRecord(catalog) && typeof catalog.classification === 'string' && isExtendedClassification(catalog.classification))) {
+    throw new TypeError(`${descriptor.id}: recipe.surfaces is empty, which only a galaxy, a galaxy cluster, a nebula or a globular cluster may declare.`);
+  }
+  return freeze({ ...descriptor, recipe });
 }
diff --git a/packages/objects/src/image-layer-bank.ts b/packages/objects/src/image-layer-bank.ts
index 08ce959ab18..29ac459b5f6 100644
--- a/packages/objects/src/image-layer-bank.ts
+++ b/packages/objects/src/image-layer-bank.ts
@@ -16,7 +16,8 @@ export function parseImageLayerBankDescriptor(input: unknown): ImageLayerBankDes
   const descriptor = parseObjectDescriptor(input);
   if (descriptor.type !== 'image-layer-bank') throw new TypeError('Object is not an image-layer bank.');
   const properties = descriptor.properties;
-  if (Object.keys(properties).some(key => key !== 'frame' && key !== 'preparation' && key !== 'cataloguePoints')) throw new TypeError('Unknown image-layer property.');
+  const unknown = Object.keys(properties).filter(key => !['frame', 'preparation', 'cataloguePoints', 'host'].includes(key));
+  if (unknown.length) throw new TypeError(`Unknown image-layer property: ${unknown.join(', ')}.`);
   const cataloguePoints = properties.cataloguePoints ?? [];
   if (!Array.isArray(cataloguePoints) || !cataloguePoints.every(bank => typeof bank === 'string' && /^[a-z][a-z0-9-]*$/u.test(bank)) || new Set(cataloguePoints).size !== cataloguePoints.length) {
     throw new TypeError(`${descriptor.id}: image-layer cataloguePoints must be distinct bank ids, not ${JSON.stringify(cataloguePoints)}.`);
diff --git a/packages/objects/src/node/catalog-directory.test.ts b/packages/objects/src/node/catalog-directory.test.ts
index a67d73aa096..6f0bd2494a9 100644
--- a/packages/objects/src/node/catalog-directory.test.ts
+++ b/packages/objects/src/node/catalog-directory.test.ts
@@ -22,14 +22,14 @@ async function objects(packages: Record<string, unknown>) {
 const level = (order: number, classifications: string[], packages: string[] = []) =>
   ({ name: `Level ${order}`, description: 'A level.', order, zoom, holds: [{ classifications }], packages });
 
-test('reads the overviews the packages author, from the nearest level out, hosted by the world host', async () => {
+test('reads the overviews the packages author, from the nearest level out', async () => {
   const root = await objects({ outer: level(2, ['galaxy-cluster']), inner: level(1, ['nebula'], ['stars']), stars: null });
-  const overviews = await readOverviews(root, 'sun');
-  assert.deepEqual(overviews.map(overview => [overview.id, overview.sceneHostId]), [['inner', 'sun'], ['outer', 'sun']]);
+  const overviews = await readOverviews(root);
+  assert.deepEqual(overviews.map(overview => [overview.id, overview.level.order]), [['inner', 1], ['outer', 2]]);
 });
 
 test('refuses levels that share an order, a classification or draw a missing package, naming them', async () => {
-  await assert.rejects(readOverviews(await objects({ a: level(1, ['nebula']), b: level(1, ['galaxy']) }), 'sun'), /a and b share order 1/);
-  await assert.rejects(readOverviews(await objects({ a: level(1, ['galaxy']), b: level(2, ['galaxy']) }), 'sun'), /a and b both hold galaxy/);
-  await assert.rejects(readOverviews(await objects({ a: level(1, ['nebula'], ['stars']) }), 'sun'), /a draws package stars/);
+  await assert.rejects(readOverviews(await objects({ a: level(1, ['nebula']), b: level(1, ['galaxy']) })), /a and b share order 1/);
+  await assert.rejects(readOverviews(await objects({ a: level(1, ['galaxy']), b: level(2, ['galaxy']) })), /a and b both hold galaxy/);
+  await assert.rejects(readOverviews(await objects({ a: level(1, ['nebula'], ['stars']) })), /a draws package stars/);
 });
diff --git a/packages/objects/src/node/catalog-directory.ts b/packages/objects/src/node/catalog-directory.ts
index 769ee13d339..99b8904bb84 100644
--- a/packages/objects/src/node/catalog-directory.ts
+++ b/packages/objects/src/node/catalog-directory.ts
@@ -4,7 +4,7 @@
 import { readFile, readdir } from 'node:fs/promises';
 import { resolve } from 'node:path';
 import { hasErrorCode, isRecord } from '@cssearth/core';
-import { catalogEntry, defineObjects, overviewEntry } from '../registry/index.js';
+import { catalogEntry, defineObjects, overviewLevel } from '../registry/index.js';
 import type { CatalogEntry, NavigationDistance, OverviewObject } from '../registry/index.js';
 
 const byOrder = (a: CatalogEntry, b: CatalogEntry) => (a.order ?? Number.MAX_SAFE_INTEGER) - (b.order ?? Number.MAX_SAFE_INTEGER) || a.id.localeCompare(b.id, 'en');
@@ -36,34 +36,35 @@ export async function readCatalog(objectsDirectory: string, distance: (descripto
   return entries;
 }
 
-/** Registered descriptors without a catalog entry are application context: the world loads their prepared resources directly. */
+/** A descriptor that mounts no scene of its own is application context: the world loads its prepared resources directly. */
 export async function readContextObjects(objectsDirectory: string, descriptors?: ObjectDescriptors) {
   const contexts: { id: string; type: string }[] = [];
   for (const [name, descriptor] of descriptors ?? await readObjectDescriptors(objectsDirectory)) {
-    if (!isRecord(descriptor) || !isRecord(descriptor.properties) || descriptor.properties.catalog !== undefined) continue;
+    if (!isRecord(descriptor) || !isRecord(descriptor.properties) || descriptor.properties.catalog !== undefined && descriptor.properties.overview === undefined) continue;
     if (descriptor.id !== name || typeof descriptor.type !== 'string') throw new TypeError(`Context object identity differs: ${name}.`);
     contexts.push({ id: name, type: descriptor.type });
   }
   return contexts.sort((a, b) => a.id.localeCompare(b.id, 'en'));
 }
 
-/** The overviews the object folders author (`properties.overview`): levels above the star systems, each an entry of the one
- * registry hosted by `sceneHostId`, in their order on the zoom ladder. */
-export async function readOverviews(objectsDirectory: string, sceneHostId: string, descriptors?: ObjectDescriptors) {
-  const overviews: OverviewObject[] = [], read = descriptors ?? await readObjectDescriptors(objectsDirectory);
+/** The levels above the star systems the object folders author (`properties.overview`), in their order on the zoom ladder,
+ * each with its descriptor: an entry of the one registry like any other package's. */
+export async function readOverviews(objectsDirectory: string, descriptors?: ObjectDescriptors) {
+  const overviews: { readonly id: string; readonly descriptor: unknown; readonly level: NonNullable<ReturnType<typeof overviewLevel>> }[] = [];
+  const read = descriptors ?? await readObjectDescriptors(objectsDirectory);
   for (const [name, descriptor] of read) {
-    const overview = overviewEntry(descriptor, sceneHostId);
-    if (!overview) continue;
-    if (overview.id !== name) throw new TypeError(`Overview identity differs: ${name}.`);
-    overviews.push(overview);
+    const level = overviewLevel(descriptor);
+    if (!level) continue;
+    if (!isRecord(descriptor) || descriptor.id !== name) throw new TypeError(`Overview identity differs: ${name}.`);
+    overviews.push({ id: name, descriptor, level });
   }
-  overviews.sort((a, b) => a.order - b.order);
+  overviews.sort((a, b) => a.level.order - b.level.order);
   for (const [index, overview] of overviews.entries()) {
-    if (index > 0 && overview.order === overviews[index - 1]!.order) throw new TypeError(`Overviews ${overviews[index - 1]!.id} and ${overview.id} share order ${overview.order} on the zoom ladder.`);
-    for (const id of overview.packages) if (!read.has(id)) throw new TypeError(`Overview ${overview.id} draws package ${id}, which is not in ${objectsDirectory}.`);
+    if (index > 0 && overview.level.order === overviews[index - 1]!.level.order) throw new TypeError(`Overviews ${overviews[index - 1]!.id} and ${overview.id} share order ${overview.level.order} on the zoom ladder.`);
+    for (const id of overview.level.packages) if (!read.has(id)) throw new TypeError(`Overview ${overview.id} draws package ${id}, which is not in ${objectsDirectory}.`);
     // One level holds each classification: a subject's breadcrumbs lead to exactly one.
-    for (const other of overviews.slice(0, index)) for (const classification of overview.holds.flatMap(group => group.classifications)) {
-      if (other.holds.some(group => group.classifications.includes(classification))) throw new TypeError(`Overviews ${other.id} and ${overview.id} both hold ${classification}.`);
+    for (const other of overviews.slice(0, index)) for (const classification of overview.level.holds.flatMap(group => group.classifications)) {
+      if (other.level.holds.some(group => group.classifications.includes(classification))) throw new TypeError(`Overviews ${other.id} and ${overview.id} both hold ${classification}.`);
     }
   }
   return overviews;
diff --git a/packages/objects/src/node/prepared-registry.test.ts b/packages/objects/src/node/prepared-registry.test.ts
index 5711f2f2005..8d72248f3af 100644
--- a/packages/objects/src/node/prepared-registry.test.ts
+++ b/packages/objects/src/node/prepared-registry.test.ts
@@ -5,6 +5,7 @@ import { join } from 'node:path';
 import { after, test } from 'node:test';
 import { parseNavigationDistance } from '../registry/index.js';
 import { PREPARED_CATALOGUE, preparedCatalogueModule, readPreparedObjects } from './prepared-registry.js';
+import type { PreparedCatalogueRow } from './prepared-registry.js';
 
 // Temporary checkouts the tests make, removed once the file's tests finish.
 const temporary: string[] = [];
@@ -17,19 +18,21 @@ const descriptor = (id: string, order: number, classification: string) => ({ sch
   worldFrame: frame } });
 const au = (value: number) => ({ meters: value * 149597870700, value, unit: 'AU', quantity: 'geometric', referencePoint: 'heliocentre', epochJdTt: 2461286.5 });
 const discovery = (featured: boolean) => ({ featured, imagery: featured, illustration: false });
-const focus = { kind: 'prepared-focus', id: 'helix', focusId: 'helix', name: 'Helix Nebula', searchNames: ['helix'], classification: 'nebula',
-  systemName: 'Milky Way', route: '/helix/', sceneHostId: 'sun',
-  distance: { meters: 3.085677581491367e16, value: 1, unit: 'pc', quantity: 'catalogue', referencePoint: 'observer', epochJdTt: null } };
+const parsec = { meters: 3.085677581491367e16, value: 1, unit: 'pc', quantity: 'catalogue', referencePoint: 'observer', epochJdTt: null };
+// A nebula: an object like any body, placed by a catalogue distance.
+const hosted = (id: string) => ({ descriptor: descriptor(id, 9, 'nebula'), distance: parseNavigationDistance(parsec), discovery: discovery(false) });
+const focus = hosted('helix');
 
-const overview = { kind: 'overview', id: 'milky-way', name: 'Milky Way', description: 'Our galaxy.', order: 1,
+const level = (id: string, name: string) => ({ schema: 'cssearth-object@2', id, type: 'density-volume', properties: { overview: { name, description: 'Our galaxy.', order: 1,
   zoom: { enter: { fade: 'system', at: 'end' }, returnBelow: { fade: 'system', at: 'middle' }, frame: { distance: { distancePc: 8000 } } },
-  holds: [{ classifications: ['nebula'] }], packages: [], route: '/milky-way/', sceneHostId: 'sun' };
+  holds: [{ classifications: ['nebula'] }], packages: [] } } });
+const overview = { descriptor: level('milky-way', 'Milky Way') };
 
 const scene = (id: string, order: number, classification: string, distanceAu: number, featured: boolean) =>
   ({ descriptor: descriptor(id, order, classification), distance: parseNavigationDistance(au(distanceAu)), discovery: discovery(featured) });
 const scenes = [scene('sun', 0, 'star', 0, false), scene('mars', 4, 'planet', 1.5, true)];
 
-async function checkout(records: { scenes?: Parameters<typeof preparedCatalogueModule>[0]; focuses?: readonly unknown[]; module?: string; overviews?: unknown } = {}) {
+async function checkout(records: { scenes?: PreparedCatalogueRow[]; focuses?: unknown[]; module?: string; overviews?: unknown } = {}) {
   const root = await mkdtemp(join(tmpdir(), 'cssearth-prepared-registry-'));
   temporary.push(root);
   for (const [id, order, classification] of [['sun', 0, 'star'], ['mars', 4, 'planet']] as const) {
@@ -39,15 +42,16 @@ async function checkout(records: { scenes?: Parameters<typeof preparedCatalogueM
   await mkdir(join(root, 'site'));
   // The catalogue order is the order prepare:catalog wrote, not the alphabetical one.
   await writeFile(join(root, PREPARED_CATALOGUE.entries), records.module ??
-    preparedCatalogueModule(records.scenes ?? scenes, (records.focuses ?? [focus]) as Parameters<typeof preparedCatalogueModule>[1]));
+    preparedCatalogueModule([...records.scenes ?? scenes, ...records.focuses ?? [focus]] as PreparedCatalogueRow[]));
   await writeFile(join(root, PREPARED_CATALOGUE.overviews), JSON.stringify(records.overviews ?? [overview]));
   return root;
 }
 
-test('reads the registry in catalogue order, with distances, discoveries, prepared focuses and overviews', async () => {
+test('reads the registry in catalogue order, with distances, discoveries and overviews', async () => {
   const registry = readPreparedObjects(await checkout());
-  assert.deepEqual(registry.objects.map(object => object.id), ['sun', 'mars', 'helix', 'milky-way']);
-  assert.deepEqual(registry.sceneObjects.map(object => object.id), ['sun', 'mars']);
+  assert.deepEqual(registry.objects.map(object => object.id), ['sun', 'mars', 'helix']);
+  assert.equal(registry.sceneObjects, registry.objects);
+  assert.deepEqual(registry.levels.map(level => level.id), ['milky-way']);
   const mars = registry.requireSceneObject('mars');
   assert.equal(mars.distance.value, 1.5);
   assert.equal(mars.discovery.featured, true);
@@ -55,8 +59,20 @@ test('reads the registry in catalogue order, with distances, discoveries, prepar
   // The catalogue's order and context stay out of the registry, as the application registry leaves them out.
   assert.ok(!('order' in mars) && !('context' in mars));
   await assert.rejects(mars.loadScene(), /cannot mount a scene/);
-  assert.throws(() => registry.requireSceneObject('helix'), /prepared focus/);
-  assert.throws(() => registry.requireSceneObject('milky-way'), /is an overview, not a scene owner/);
+  // A nebula is a scene and a body of the world like any other.
+  assert.equal(registry.requireSceneObject('helix').id, 'helix');
+  assert.deepEqual(registry.worldObjects.map(object => object.id), ['sun', 'mars', 'helix']);
+  const helix = registry.objects.find(object => object.id === 'helix')!;
+  // A level with a catalogue entry is a body of the world too. It is still a level, not an object.
+  const placedLevel = { descriptor: { ...hosted('local-group').descriptor, type: 'galaxy-catalog', properties: { ...hosted('local-group').descriptor.properties,
+    overview: { order: 2, zoom: level('x', 'x').properties.overview.zoom, holds: [{ classifications: ['galaxy'] }] } } },
+    distance: parseNavigationDistance(parsec), discovery: discovery(true) };
+  const placed = readPreparedObjects(await checkout({ overviews: [overview, placedLevel] }));
+  assert.deepEqual(placed.worldObjects.map(object => object.id), ['sun', 'mars', 'helix', 'local-group']);
+  assert.deepEqual(placed.levels.map(level => level.id), ['milky-way', 'local-group']);
+  assert.deepEqual(placed.objects.map(object => object.id), ['sun', 'mars', 'helix']);
+  assert.partialDeepStrictEqual(helix, { classification: 'nebula', route: '/helix/', systemName: 'Solar System' });
+  assert.throws(() => registry.requireSceneObject('milky-way'), /no scene of its own/);
   assert.throws(() => registry.requireSceneObject('pluto'), /Unknown/);
 });
 
@@ -65,14 +81,12 @@ test('reads each checkout once per process', async () => {
   assert.equal(readPreparedObjects(root), readPreparedObjects(join(root, 'site', '..')));
 });
 
-test('refuses a catalogue it cannot decode or a focus without its host', async () => {
+test('refuses a catalogue it cannot decode or a level without its host', async () => {
   const cases: [Parameters<typeof checkout>[0], RegExp][] = [
-    [{ scenes: [...scenes, { ...scenes[1]!, descriptor: { id: 'pluto' } }] }, /Invalid catalogue descriptor/],
+    [{ scenes: [...scenes, { ...scenes[1]!, descriptor: { id: 'pluto' } }] }, /Invalid catalogue entry/],
     [{ scenes: [{ ...scenes[0]!, discovery: { featured: 'yes' } as never }] }, /Invalid prepared object discovery/],
-    [{ focuses: [{ ...focus, sceneHostId: 'mars', route: '/helix/' }, { ...focus, id: 'm1', focusId: 'm1', route: '/m1/', sceneHostId: 'jupiter' }] }, /not a registered scene: m1/],
-    [{ focuses: [{ kind: 'planet', id: 'x' }] }, /Invalid catalogue entry/],
+    [{ focuses: [{ ...focus, descriptor: null }] }, /Invalid catalogue entry/],
     [{ module: 'export const OTHER = [];\n' }, /exports no CATALOGUE_ENTRIES array/],
-    [{ overviews: [{ ...overview, sceneHostId: 'jupiter' }] }, /Overview host is not a registered scene: milky-way/],
     [{ overviews: {} }, /overviews/],
   ];
   for (const [records, error] of cases) {
diff --git a/packages/objects/src/node/prepared-registry.ts b/packages/objects/src/node/prepared-registry.ts
index ca02ff08425..32712a956ca 100644
--- a/packages/objects/src/node/prepared-registry.ts
+++ b/packages/objects/src/node/prepared-registry.ts
@@ -4,23 +4,25 @@
 import { createRequire } from 'node:module';
 import { resolve } from 'node:path';
 import { isRecord } from '@cssearth/core';
-import { catalogueObject, defineObjects, isSceneObject } from '../registry/index.js';
-import type { NavigableObject, NavigationDistance, ObjectDiscovery, ObjectEntry, PreparedFocusObject } from '../registry/index.js';
+import { catalogueLevel, catalogueObject, defineObjects } from '../registry/index.js';
+import type { NavigableObject, NavigationDistance, ObjectDiscovery, ObjectEntry, OverviewObject, WorldBody } from '../registry/index.js';
 
 /** The catalogue files, relative to the checkout. `entries` is a module: each scene object's descriptor, as its folder's
- * object.json holds it, with its distance and discovery, then each prepared focus, in registry order. The overviews are apart because every
+ * object.json holds it, with its distance and discovery, in registry order. The overviews are apart because every
  * page's object directory reads them (`site/object-directory.mts`) and a page never loads the whole registry. */
 export const PREPARED_CATALOGUE = Object.freeze({
   entries: 'site/prepared-catalogue.mjs',
   overviews: 'site/prepared-overview-objects.json',
 });
 
+/** One row of the prepared catalogue: a package's descriptor with its distance and discovery. Every object's row has this
+ * shape (`catalogueObject` reads it); a level's row has it too, without a distance unless the level has a place. */
+export interface PreparedCatalogueRow { descriptor: unknown; distance?: NavigationDistance; discovery?: ObjectDiscovery }
+
 /** The catalogue module `prepare:catalog` writes at `PREPARED_CATALOGUE.entries`. */
-export function preparedCatalogueModule(scenes: readonly { descriptor: unknown; distance: NavigationDistance; discovery: ObjectDiscovery }[],
-  focuses: readonly PreparedFocusObject[]) {
+export function preparedCatalogueModule(rows: readonly PreparedCatalogueRow[]) {
   // Each descriptor is read here and written into the module as one JSON string: a module that imported every package's
   // object.json was 3,756 module requests, past the dev server's 60 s module-fetch limit (2026-09-30).
-  const rows = [...scenes.map(({ descriptor, distance, discovery }) => ({ kind: 'scene', descriptor, distance, discovery })), ...focuses];
   return '// Generated by pnpm prepare:catalog. Edit each object.json.\n' +
     `export const CATALOGUE_ENTRIES = Object.freeze(JSON.parse(${JSON.stringify(JSON.stringify(rows))}));\n`;
 }
@@ -29,12 +31,16 @@ export function preparedCatalogueModule(scenes: readonly { descriptor: unknown;
 export type PreparedSceneObject = ObjectEntry<never, AbortSignal>;
 export type PreparedNavigableObject = NavigableObject<never, AbortSignal>;
 export interface PreparedObjectRegistry {
-  /** The catalogue entries as written, then the overviews, in registry order. */
+  /** The catalogue entries as written, in registry order. */
   readonly entries: readonly Readonly<Record<string, unknown>>[];
-  /** Every navigable object, as `OBJECTS` lists them. */
+  /** Every object, as `OBJECTS` lists them. Each has a scene of its own. */
   readonly objects: readonly PreparedNavigableObject[];
-  /** The scene objects, as `SCENE_OBJECTS` lists them. */
+  /** The same list, under the name the body lanes read. */
   readonly sceneObjects: readonly PreparedSceneObject[];
+  /** The levels of the zoom ladder, from the nearest out. They are views, not objects. */
+  readonly levels: readonly OverviewObject[];
+  /** What the world context draws and names: every object, and a level with a place of its own (the Local Group). */
+  readonly worldObjects: readonly WorldBody[];
   requireSceneObject(id: string): PreparedSceneObject;
 }
 
@@ -58,20 +64,24 @@ function decodeRegistry(checkout: string): PreparedObjectRegistry {
   if (!Array.isArray(catalogue)) throw new TypeError(`Invalid prepared catalogue: ${PREPARED_CATALOGUE.entries} exports no CATALOGUE_ENTRIES array.`);
   const overviews: unknown = load(resolve(checkout, PREPARED_CATALOGUE.overviews));
   if (!Array.isArray(overviews)) throw new TypeError(`Invalid prepared catalogue overviews: ${PREPARED_CATALOGUE.overviews}.`);
-  const entries: Readonly<Record<string, unknown>>[] = [...catalogue, ...overviews].map(entry => {
-    if (!isRecord(entry)) throw new TypeError(`Invalid prepared catalogue entry in ${PREPARED_CATALOGUE.entries}.`);
+  const rows = (list: readonly unknown[], path: string): Readonly<Record<string, unknown>>[] => list.map(entry => {
+    if (!isRecord(entry)) throw new TypeError(`Invalid prepared catalogue entry in ${path}.`);
     return entry;
   });
+  const entries = rows(catalogue, PREPARED_CATALOGUE.entries);
   const refuse = () => async (): Promise<never> => { throw new Error('Preparation cannot mount a scene.'); };
   const objects = defineObjects<PreparedNavigableObject>(entries.map(entry => catalogueObject<never, AbortSignal>(entry, refuse)));
-  const sceneObjects = Object.freeze(objects.filter(isSceneObject));
-  for (const object of objects) if (object.kind !== 'scene' && !sceneObjects.some(host => host.id === object.sceneHostId)) {
-    throw new TypeError(`${object.kind === 'overview' ? 'Overview' : 'Prepared focus'} host is not a registered scene: ${object.id}`);
-  }
-  return Object.freeze({ entries: Object.freeze(entries), objects, sceneObjects, requireSceneObject(id: string) {
+  const levels = Object.freeze(rows(overviews, PREPARED_CATALOGUE.overviews).map(catalogueLevel).sort((a, b) => a.order - b.order));
+  // An id names one page: an object's or a level's.
+  defineObjects<{ id: string; route: string }>([...objects, ...levels]);
+  const placedLevels = levels.flatMap((level): WorldBody[] => level.worldFrame && level.classification && level.systemName && level.color && level.distance && level.discovery
+    ? [{ id: level.id, name: level.name, classification: level.classification, ...(level.classificationLabel === undefined ? {} : { classificationLabel: level.classificationLabel }),
+      systemName: level.systemName, color: level.color, distance: level.distance, worldFrame: level.worldFrame, discovery: level.discovery }] : []);
+  const worldObjects = Object.freeze([...objects, ...placedLevels]);
+  return Object.freeze({ entries: Object.freeze(entries), objects, sceneObjects: objects, levels, worldObjects, requireSceneObject(id: string) {
     const object = objects.find(candidate => candidate.id === id);
-    if (!object) throw new Error(`Unknown cssEarth object: ${id}`);
-    if (!isSceneObject(object)) throw new TypeError(`Object ${id} is ${object.kind === 'overview' ? 'an overview' : 'a prepared focus'}, not a scene owner.`);
-    return object;
+    if (object) return object;
+    if (levels.some(level => level.id === id)) throw new TypeError(`${id} is a level of the zoom ladder: it has no scene of its own.`);
+    throw new Error(`Unknown cssEarth object: ${id}`);
   } });
 }
diff --git a/packages/objects/src/node/provenance/dataset-destination.test.mts b/packages/objects/src/node/provenance/dataset-destination.test.mts
index bb6fbc343b1..937510c0e41 100644
--- a/packages/objects/src/node/provenance/dataset-destination.test.mts
+++ b/packages/objects/src/node/provenance/dataset-destination.test.mts
@@ -41,7 +41,7 @@ test('observation attribution is explicit and independent of descriptive process
   assert.equal(compileContributions([excludedParent], catalog, DATASET_ROUTES).edges.length, 0, 'a derived preview cannot reintroduce excluded illustration credit');
 });
 
-test('both graph compilers give bodies and catalogue focuses the same page dataset URLs', () => {
+test('both graph compilers give every object the same page dataset URLs', () => {
   const objects = [object('mercury', '/mercury/', 'src/objects/mercury'), object('m42', '/m42/', 'src/objects/m42')];
   const usage = compileSourceUsage(objects, sources, DATASET_ROUTES), contributions = compileContributions(objects, catalog, DATASET_ROUTES);
   assert.deepEqual(usage.datasets, contributions.datasets);
diff --git a/packages/objects/src/node/source-manifest.test.ts b/packages/objects/src/node/source-manifest.test.ts
index 3ad00e79115..3f2d84d411e 100644
--- a/packages/objects/src/node/source-manifest.test.ts
+++ b/packages/objects/src/node/source-manifest.test.ts
@@ -25,6 +25,12 @@ test('document descriptions are optional without weakening generator identity',
   assert.throws(() => parse({ ...manifest, generatedIntermediates: [{ ...base.generatedIntermediates[0], generator: '' }] }), /generator/);
 });
 
+test('only a manifest whose owner prepares nothing from input files may list no inputs', () => {
+  const manifest = { ...sourceManifest({}), inputs: [] };
+  assert.throws(() => validateSourceManifest('fixture', manifest), /inputs are empty/);
+  assert.deepEqual(validateSourceManifest('fixture', manifest, { inputs: 'optional' }).inputs, []);
+});
+
 test("validates and verifies every authoritative source entry class", async () => {
   const root = await mkdtemp(join(tmpdir(), "cssearth-source-manifest-"));
   temporary.push(root);
diff --git a/packages/objects/src/node/source-manifest.ts b/packages/objects/src/node/source-manifest.ts
index 5068e156e37..33778561043 100644
--- a/packages/objects/src/node/source-manifest.ts
+++ b/packages/objects/src/node/source-manifest.ts
@@ -19,10 +19,11 @@ const COLLECTIONS = Object.freeze([
   "documents",
 ] as const);
 
-export async function createSourceManifest({ objectId, objectName, sourceRoot }: SourceManifestLocation) {
+export async function createSourceManifest({ objectId, objectName, sourceRoot, inputs = 'required' }: SourceManifestLocation & { inputs?: 'required' | 'optional' }) {
   const manifest = validateSourceManifest(
     objectId,
     JSON.parse(await readFile(resolve(sourceRoot, "manifest.json"), "utf8")),
+    { inputs },
   );
   // A dataset may read an acquired input or a file this repository generates from one, such as a spectrum sampled here from the
   // archive's coefficients. Both are declared the same way, and both must be present before they are read.
@@ -72,7 +73,9 @@ export async function createSourceManifest({ objectId, objectName, sourceRoot }:
 /** Every source manifest, of an object or of a shared kernel bank, has this one format name. */
 export const SOURCE_MANIFEST_SCHEMA = "cssearth-authoritative-sources@3";
 
-export function validateSourceManifest(objectId: string, input: unknown): Readonly<SourceManifest> {
+/** `inputs: 'optional'` is for an object whose recipe declares no surface: it prepares nothing from input files, and its
+ * datasets' inputs are their banks'. Every other manifest lists at least one input. */
+export function validateSourceManifest(objectId: string, input: unknown, { inputs = 'required' }: { inputs?: 'required' | 'optional' } = {}): Readonly<SourceManifest> {
   const value = input as SourceManifest;
   if (!value || typeof value !== "object" || isArray(value) ||
       value.schema !== SOURCE_MANIFEST_SCHEMA) {
@@ -83,7 +86,8 @@ export function validateSourceManifest(objectId: string, input: unknown): Readon
       throw new TypeError(`Object ${objectId} source manifest ${collection} is missing.`);
     }
   }
-  if (value.inputs.length === 0) {
+
+  if (inputs === 'required' && value.inputs.length === 0) {
     throw new TypeError(`Object ${objectId} source manifest inputs are empty.`);
   }
 
diff --git a/packages/objects/src/objects.test.ts b/packages/objects/src/objects.test.ts
index 6ac4416b067..05ce629af29 100644
--- a/packages/objects/src/objects.test.ts
+++ b/packages/objects/src/objects.test.ts
@@ -63,6 +63,14 @@ describe('object descriptor boundary', () => {
     }
   });
 
+  it('lets only an object with no solid surface declare no surfaces', () => {
+    const { sources, shape } = recipe(), bare = { schema: 'cssearth-authored-object@2', sources, shape, surfaces: [] };
+    const authored = (classification: string) => ({ ...descriptor(), properties: { recipe: bare, catalog: { classification } } });
+    assert.deepEqual(parseAuthoredObjectDescriptor(authored('galaxy')).recipe.surfaces, []);
+    assert.throws(() => parseAuthoredObjectDescriptor(authored('planet')), /recipe.surfaces is empty/);
+    assert.throws(() => parseAuthoredObjectDescriptor({ ...descriptor(), properties: { recipe: bare } }), /recipe.surfaces is empty/);
+  });
+
   it('requires a typed recipe at the authored object boundary', () => {
     assert.throws(() => parseAuthoredObjectDescriptor(descriptor()), /properties.recipe/);
   });
diff --git a/packages/objects/src/provenance/dataset-destination.ts b/packages/objects/src/provenance/dataset-destination.ts
index 9f184405589..59b4304f558 100644
--- a/packages/objects/src/provenance/dataset-destination.ts
+++ b/packages/objects/src/provenance/dataset-destination.ts
@@ -4,7 +4,7 @@ import type { DatasetHost, DatasetRoutes } from './dataset-routes.js';
 /** The application route that shows the context objects (the Sun's scene); preparation records it for each context package. */
 export const CONTEXT_ROUTE = '/sun/';
 
-/** An object's dataset is selected on its own page, a scene's or a catalogue focus's alike. */
+/** An object's dataset is selected on its own page. */
 export function datasetDestination(objectId: string, route: string, datasetId: string): string {
   sourceId(objectId); sourceId(datasetId);
   if (route !== `/${objectId}/`) throw new TypeError(`Invalid dataset object route ${route} for ${objectId}: an object's dataset is on its own page.`);
diff --git a/packages/objects/src/registry/index.ts b/packages/objects/src/registry/index.ts
index 41d58ae4c75..b521a4a6ce4 100644
--- a/packages/objects/src/registry/index.ts
+++ b/packages/objects/src/registry/index.ts
@@ -1,5 +1,5 @@
 // The application registry's shared contracts: the object entry schema and catalogue decoding, the discovery, distance,
-// arrival and prepared-focus parsers, the classification categories, the fact order, the destination-name normalisation
+// arrival and zoom-level parsers, the classification categories, the fact order, the destination-name normalisation
 // preparation and search share, the context colour, and world-rotation validation. The host binds the registry to its
 // scene loader (`site/objects.mts`); nothing here loads a scene or reads a file.
 export { parseArrivalView, parseArrivalBillboard } from './arrival-view.js';
@@ -10,16 +10,16 @@ export { orderFacts } from './fact-order.js';
 export { mapLabel } from './map-label.js';
 export { distanceDescription, parseNavigationDistance } from './navigation-distance.js';
 export type { NavigationDistance } from './navigation-distance.js';
-export { catalogEntry, catalogueObject } from './object-catalog.js';
+export { catalogEntry, catalogueLevel, catalogueObject } from './object-catalog.js';
 export type { CatalogContext, CatalogEntry } from './object-catalog.js';
 export { matchesObjectCategory, matchesObjectClassification } from './object-categories.js';
 export { discoveryDescription, discoveryVisibility, isDiscoveryAnchor, offTheMap, parseObjectDiscovery } from './object-discovery.js';
 export type { ObjectDiscovery } from './object-discovery.js';
-export { defineObject, defineObjects, OBJECT_CLASSIFICATIONS } from './object-schema.js';
+export { defineObject, defineObjects, EXTENDED_CLASSIFICATIONS, isExtendedClassification, isPlacedClassification, OBJECT_CLASSIFICATIONS, PLACED_CLASSIFICATIONS } from './object-schema.js';
 export type { ObjectClassification, ObjectDefinitionInput, ObjectEntry, ObjectPositionM, ObjectWorldFrame } from './object-schema.js';
-export { definePreparedFocus, isSceneObject } from './prepared-focus-object.js';
-export type { NavigableObject, PreparedFocusObject } from './prepared-focus-object.js';
-export { defineOverview, overviewEntry, overviewHolding } from './overview-object.js';
+export { destinationSearchNames } from './navigable-object.js';
+export type { NavigableObject, WorldBody } from './navigable-object.js';
+export { overviewHolding, overviewLevel } from './overview-object.js';
 export type { OverviewDistance, OverviewFrame, OverviewHolding, OverviewObject, OverviewZoom } from './overview-object.js';
 export { validateWorldReflection, validateWorldRotation } from './world-rotation.js';
 export type { WorldRotation } from './world-rotation.js';
diff --git a/packages/objects/src/registry/navigable-object.ts b/packages/objects/src/registry/navigable-object.ts
new file mode 100644
index 00000000000..485275231ff
--- /dev/null
+++ b/packages/objects/src/registry/navigable-object.ts
@@ -0,0 +1,34 @@
+import type { NavigationDistance } from './navigation-distance.js';
+import type { ObjectClassification, ObjectEntry, ObjectWorldFrame } from './object-schema.js';
+import type { ObjectDiscovery } from './object-discovery.js';
+import { normalizeDestinationQuery } from './destination-search.js';
+
+/**
+ * An object of the one registry: a package with a catalogue entry. It has an identity, a place in the world and a scene of
+ * its own. A planet, a star, a galaxy and a cluster of galaxies are all this. There is no kind and no other shape; a level
+ * of the zoom ladder is a view of a scene (overview-object.ts), not an object.
+ */
+export type NavigableObject<Scene = unknown, Signal = unknown> = ObjectEntry<Scene, Signal> & {
+  readonly aliases: readonly string[];
+  /** The names an object with alternate names is found by: its id, its name and each alias. */
+  readonly searchNames?: readonly string[];
+};
+
+/** What the world context draws, names and selects: every object, and a level that has a place of its own. */
+export interface WorldBody {
+  readonly id: string;
+  readonly name: string;
+  readonly classification: ObjectClassification;
+  readonly classificationLabel?: string;
+  readonly systemName: string;
+  readonly color: string;
+  readonly distance: NavigationDistance;
+  readonly worldFrame: ObjectWorldFrame;
+  readonly discovery: Readonly<ObjectDiscovery>;
+}
+
+/** The names an object is found by: its id, name and aliases, normalised, with and without spaces. */
+export const destinationSearchNames = (names: readonly string[]): string[] => [...new Set(names.flatMap(name => {
+  const normalized = normalizeDestinationQuery(name);
+  return [normalized, normalized.replaceAll(' ', '')];
+}))];
diff --git a/packages/objects/src/registry/object-catalog.ts b/packages/objects/src/registry/object-catalog.ts
index 6666e9f7c0b..4cdbc3a86cb 100644
--- a/packages/objects/src/registry/object-catalog.ts
+++ b/packages/objects/src/registry/object-catalog.ts
@@ -1,13 +1,15 @@
+import { parseDistanceSubject } from '@cssearth/catalog';
 import type { ObjectDiscovery } from './object-discovery.js';
 import { parseObjectDiscovery } from './object-discovery.js';
 import { isRecord } from '@cssearth/core';
-import { defineObject } from './object-schema.js';
+import { defineObject, OBJECT_CLASSIFICATIONS } from './object-schema.js';
 import type { ObjectClassification, ObjectDefinitionInput, ObjectEntry } from './object-schema.js';
 import type { NavigationDistance } from './navigation-distance.js';
 import { parseNavigationDistance } from './navigation-distance.js';
-import { definePreparedFocus } from './prepared-focus-object.js';
-import type { NavigableObject } from './prepared-focus-object.js';
-import { defineOverview } from './overview-object.js';
+import { destinationSearchNames } from './navigable-object.js';
+import type { NavigableObject } from './navigable-object.js';
+import { overviewLevel } from './overview-object.js';
+import type { OverviewObject } from './overview-object.js';
 
 /** `orbitsWithinAu`: a host's authored presentation range, the camera distance up to which its system draws every orbit. */
 /** `labelPlacement: 'centre'` captions the body over its middle instead of below it (Sgr A*'s black shadow). */
@@ -16,11 +18,8 @@ export interface CatalogContext { name?: string; color?: string; order?: number;
 export type CatalogEntry<Scene = unknown, Signal = unknown> = ObjectEntry<Scene, Signal> & { readonly aliases: readonly string[]; order?: number; context?: CatalogContext };
 
 function classification(value: unknown): ObjectClassification {
-  switch (value) {
-    case 'star': case 'planet': case 'satellite': case 'dwarf-planet':
-    case 'asteroid': case 'comet': case 'trans-neptunian': case 'interstellar': case 'exoplanet': case 'black-hole': return value;
-    default: throw new TypeError('Invalid catalogue classification.');
-  }
+  if (!(OBJECT_CLASSIFICATIONS as readonly unknown[]).includes(value)) throw new TypeError(`Invalid catalogue classification: ${String(value)}.`);
+  return value as ObjectClassification;
 }
 
 function order(value: unknown): number | undefined {
@@ -45,9 +44,11 @@ export function catalogEntry<Scene, Signal>(input: unknown, loadScene: ObjectDef
   const catalog = input.properties.catalog;
   if (!isRecord(catalog)) throw new TypeError(`Missing catalogue entry: ${input.id}.`);
   const { name, systemName, color, distanceAu, description } = catalog;
-  const keys = ['name', 'systemName', 'classification', 'classificationLabel', 'color', 'distanceAu', 'description', 'aliases', 'order', 'context', 'featured', 'illustrationDatasets', 'orientationReference'];
+  const keys = ['name', 'systemName', 'classification', 'classificationLabel', 'color', 'distanceAu', 'description', 'aliases', 'order', 'context', 'featured', 'illustrationDatasets', 'orientationReference', 'distanceSubject'];
   if (Object.keys(catalog).some(key => !keys.includes(key)) || typeof name !== 'string' || typeof systemName !== 'string' ||
       typeof color !== 'string' || typeof distanceAu !== 'number' || typeof description !== 'string') throw new TypeError(`Invalid catalogue metadata: ${input.id}.`);
+  // Another subject's distance the package adopts (a nebula placed at its star cluster's): navigation states it.
+  if (catalog.distanceSubject !== undefined) parseDistanceSubject(catalog.distanceSubject);
   if (catalog.orientationReference !== undefined && (!Number.isInteger(catalog.orientationReference) || Number(catalog.orientationReference) < 1)) throw new TypeError(`Invalid orientation reference: ${input.id}.`);
   if (catalog.featured !== undefined && typeof catalog.featured !== 'boolean' || catalog.illustrationDatasets !== undefined &&
       (!Array.isArray(catalog.illustrationDatasets) || !catalog.illustrationDatasets.every(id => typeof id === 'string' && /^[a-z][a-z0-9-]*$/u.test(id)))) throw new TypeError(`Invalid discovery metadata: ${input.id}.`);
@@ -75,16 +76,32 @@ export function catalogEntry<Scene, Signal>(input: unknown, loadScene: ObjectDef
     order: order(catalog.order), ...(context ? { context } : {}) };
 }
 
-/** One entry of the prepared catalogue, as `prepare:catalog` writes it and `/objects/<id>/entry.json` serves it: a scene
- * object's descriptor with its navigation distance and discovery, a prepared focus or an overview. `loadScene` binds a
- * scene object's descriptor to the host's scene loader. The catalogue's order and context stay out of the object. */
+/** One entry of the prepared catalogue, as `prepare:catalog` writes it and `/objects/<id>/entry.json` serves it: a package's
+ * descriptor with its navigation distance and discovery. What the object is comes from the descriptor alone; `loadScene`
+ * binds its scene to the host's loader. The catalogue's order and context stay out of the object. */
 export function catalogueObject<Scene, Signal>(value: unknown,
   loadScene: (descriptor: Record<string, unknown>) => ObjectDefinitionInput<Scene, Signal>['loadScene']): NavigableObject<Scene, Signal> {
-  if (!isRecord(value)) throw new TypeError('Invalid catalogue entry.');
-  if (value.kind === 'prepared-focus') return definePreparedFocus(value);
-  if (value.kind === 'overview') return defineOverview(value);
-  if (value.kind !== 'scene' || !isRecord(value.descriptor)) throw new TypeError('Invalid catalogue entry.');
-  const { order: _order, context: _context, ...object } = catalogEntry(value.descriptor, loadScene(value.descriptor),
-    parseNavigationDistance(value.distance), parseObjectDiscovery(value.discovery));
-  return object;
+  if (!isRecord(value) || !isRecord(value.descriptor) || !isRecord(value.descriptor.properties) || typeof value.descriptor.id !== 'string') throw new TypeError('Invalid catalogue entry.');
+  const descriptor = value.descriptor, id = value.descriptor.id;
+  if (value.descriptor.properties.catalog === undefined) throw new TypeError(`Invalid catalogue entry: ${id} has no catalogue entry.`);
+  if (overviewLevel(descriptor) !== null) throw new TypeError(`Invalid catalogue entry: ${id} is a level of the zoom ladder, not an object.`);
+  const { order: _order, context: _context, ...object } = catalogEntry(descriptor, loadScene(descriptor), parseNavigationDistance(value.distance), parseObjectDiscovery(value.discovery));
+  // An object with alternate names is found by them: search matches its id, its name and each alias.
+  return object.aliases.length ? { ...object, searchNames: Object.freeze(destinationSearchNames([id, object.name, ...object.aliases])) } : object;
+}
+
+/** One level of the zoom ladder, from its prepared row: its package's `properties.overview`, named by that block or, for a
+ * level with a place of its own (the Local Group), by its catalogue block, which also makes it a body of the world. */
+export function catalogueLevel(value: unknown): OverviewObject {
+  if (!isRecord(value) || !isRecord(value.descriptor) || !isRecord(value.descriptor.properties) || typeof value.descriptor.id !== 'string') throw new TypeError('Invalid level entry.');
+  const descriptor = value.descriptor, id = value.descriptor.id, level = overviewLevel(descriptor);
+  if (level === null) throw new TypeError(`Invalid level entry: ${id} authors no overview.`);
+  const placed = value.descriptor.properties.catalog === undefined ? null
+    : catalogEntry(descriptor, async () => { throw new Error(`${id} is a level: it has no scene of its own.`); }, parseNavigationDistance(value.distance), parseObjectDiscovery(value.discovery));
+  const { name: levelName, description: levelDescription, ...ladder } = level;
+  const name = placed?.name ?? levelName, description = placed?.description ?? levelDescription;
+  if (name === undefined || description === undefined) throw new TypeError(`Invalid level entry: ${id} has no name or description.`);
+  return Object.freeze({ id, name, description, route: `/${id}/`, ...ladder,
+    ...(placed ? { classification: placed.classification, ...(placed.classificationLabel === undefined ? {} : { classificationLabel: placed.classificationLabel }),
+      systemName: placed.systemName, color: placed.color, distance: placed.distance, worldFrame: placed.worldFrame, discovery: placed.discovery } : {}) });
 }
diff --git a/packages/objects/src/registry/object-discovery.ts b/packages/objects/src/registry/object-discovery.ts
index a0e50f3334f..7000fdd7b17 100644
--- a/packages/objects/src/registry/object-discovery.ts
+++ b/packages/objects/src/registry/object-discovery.ts
@@ -1,3 +1,4 @@
+import { isPlacedClassification } from './object-schema.js';
 import { isRecord } from '@cssearth/core';
 import { matchesObjectClassification } from './object-categories.js';
 import { parseArrivalView, type PreparedArrivalView } from './arrival-view.js';
@@ -37,7 +38,8 @@ export function offTheMap(object: { classification: string; discovery: ObjectDis
 }
 
 export function isDiscoveryAnchor(object: { classification: string }): boolean {
-  return object.classification === 'star' || object.classification === 'black-hole' || object.classification === 'planet';
+  // A placed body (a star, a black hole, a galaxy, a cluster, a nebula) is a place of its own scale; a planet is one of its system.
+  return isPlacedClassification(object.classification) || object.classification === 'planet';
 }
 
 type DiscoveryObjects = readonly { id: string; classification: string; discovery: ObjectDiscovery }[];
diff --git a/packages/objects/src/registry/object-schema.ts b/packages/objects/src/registry/object-schema.ts
index 06c097f41cf..7f038383c31 100644
--- a/packages/objects/src/registry/object-schema.ts
+++ b/packages/objects/src/registry/object-schema.ts
@@ -17,7 +17,15 @@ export interface ObjectWorldFrame {
   readonly orbitUpReference?: ObjectPositionM;
 }
 
-export type ObjectClassification = 'star' | 'planet' | 'satellite' | 'dwarf-planet' | 'asteroid' | 'comet' | 'trans-neptunian' | 'interstellar' | 'exoplanet' | 'black-hole';
+export type ObjectClassification = 'star' | 'planet' | 'satellite' | 'dwarf-planet' | 'asteroid' | 'comet' | 'trans-neptunian' | 'interstellar' | 'exoplanet' | 'black-hole'
+  | 'galaxy' | 'galaxy-cluster' | 'nebula' | 'globular-cluster';
+/** A body placed by its astrometry (a position and a distance) rather than an orbit: stars, black holes and the galaxies,
+ * clusters and nebulae beyond them. Each is a parentless world-context body; none draws a trajectory. */
+/** The placed bodies with no solid surface: their radius frames them, it occludes nothing. */
+export const EXTENDED_CLASSIFICATIONS: readonly ObjectClassification[] = Object.freeze(['galaxy', 'galaxy-cluster', 'nebula', 'globular-cluster']);
+export const isExtendedClassification = (classification: string | undefined): boolean => (EXTENDED_CLASSIFICATIONS as readonly (string | undefined)[]).includes(classification);
+export const PLACED_CLASSIFICATIONS: readonly ObjectClassification[] = Object.freeze(['star', 'black-hole', ...EXTENDED_CLASSIFICATIONS]);
+export const isPlacedClassification = (classification: string | undefined): boolean => (PLACED_CLASSIFICATIONS as readonly (string | undefined)[]).includes(classification);
 /** `Scene` is what the host's loader resolves to and `Signal` how the host cancels it (an `AbortSignal`); the registry only
  * checks that a loader is bound. */
 export interface ObjectDefinitionInput<Scene = unknown, Signal = unknown> {
@@ -27,7 +35,7 @@ export interface ObjectDefinitionInput<Scene = unknown, Signal = unknown> {
   color: string; distance: NavigationDistance; route: string; description: string;
   loadScene(signal?: Signal): Promise<Scene>; worldFrame: unknown; discovery?: ObjectDiscovery;
 }
-export type ObjectEntry<Scene = unknown, Signal = unknown> = Readonly<Omit<ObjectDefinitionInput<Scene, Signal>, 'worldFrame' | 'discovery'> & { discovery: Readonly<ObjectDiscovery>; kind: 'scene'; worldFrame: ObjectWorldFrame }>;
+export type ObjectEntry<Scene = unknown, Signal = unknown> = Readonly<Omit<ObjectDefinitionInput<Scene, Signal>, 'worldFrame' | 'discovery'> & { discovery: Readonly<ObjectDiscovery>; worldFrame: ObjectWorldFrame }>;
 
 const OBJECT_INPUT_KEYS = new Set([
   "id",
@@ -48,6 +56,7 @@ const OBJECT_INPUT_KEYS = new Set([
 // list deliberately when a package introduces a new kind of body.
 export const OBJECT_CLASSIFICATIONS = Object.freeze([
   "star", "planet", "satellite", "dwarf-planet", "asteroid", "trans-neptunian", "comet", "interstellar", "exoplanet", "black-hole",
+  "galaxy", "galaxy-cluster", "nebula", "globular-cluster",
 ]);
 
 export function defineObject<Scene, Signal>(input: ObjectDefinitionInput<Scene, Signal>): ObjectEntry<Scene, Signal> {
@@ -70,7 +79,6 @@ export function defineObject<Scene, Signal>(input: ObjectDefinitionInput<Scene,
   }
 
   return Object.freeze({
-    kind: 'scene',
     id,
     name,
     systemName,
@@ -112,7 +120,7 @@ function nonEmpty(value: unknown): value is string {
 }
 // Registry capability data is numeric; importing a renderer entry here would
 // pull its native camera factory into every otherwise unrelated object route.
-function parseWorldFrame(value: unknown): ObjectWorldFrame {
+export function parseWorldFrame(value: unknown): ObjectWorldFrame {
   const fields = ['referenceFrame', 'epochJdTt', 'originM', 'presentationToReference', 'metersPerUnit', 'bodyRadiusM', 'orbitUpReference'];
   const vector = (input: unknown, length: number): input is number[] => isArray(input) && input.length === length && Array.from(input).every(Number.isFinite);
   if (!isRecord(value) || Object.getPrototypeOf(value) !== Object.prototype || Object.keys(value).some(key => !fields.includes(key)) ||
diff --git a/packages/objects/src/registry/overview-object.test.ts b/packages/objects/src/registry/overview-object.test.ts
index d4075808f4f..c85a744c3f3 100644
--- a/packages/objects/src/registry/overview-object.test.ts
+++ b/packages/objects/src/registry/overview-object.test.ts
@@ -1,54 +1,54 @@
 import { describe, it } from 'node:test';
 import assert from 'node:assert/strict';
 import { isDeepStrictEqual } from 'node:util';
-import { defineOverview, overviewEntry, overviewHolding } from './overview-object.js';
+import { overviewHolding, overviewLevel } from './overview-object.js';
 
 const zoom = { enter: { distancePc: 5e6 }, returnBelow: { distancePc: 4e6 }, frame: { distance: { distancePc: 1e8 } } };
 const authored = { name: 'Local Group', description: 'Our galaxy group.', order: 2, zoom, holds: [{ classifications: ['galaxy'], list: 'Galaxies' }] };
 const descriptor = (overview: unknown, properties: Record<string, unknown> = {}) =>
   ({ schema: 'cssearth-object@2', id: 'local-group', type: 'galaxy-catalog', properties: { overview, ...properties } });
-const entry = (changes: Record<string, unknown> = {}) => ({ kind: 'overview', id: 'local-group', name: 'Local Group', description: 'x', order: 2, zoom,
-  holds: [], packages: [], route: '/local-group/', sceneHostId: 'sun', ...changes });
+const level = (changes: Record<string, unknown> = {}) => overviewLevel(descriptor({ ...authored, ...changes }))!;
 
 describe('overview entries', () => {
-  it('reads the overview a package authors, hosted by the scene preparation names', () => {
-    assert.deepEqual(overviewEntry(descriptor(authored), 'sun'), { kind: 'overview', id: 'local-group', name: 'Local Group', description: 'Our galaxy group.',
-      order: 2, zoom, holds: [{ classifications: ['galaxy'], list: 'Galaxies' }], packages: [], route: '/local-group/', sceneHostId: 'sun' });
+  it('reads the level a package authors', () => {
+    assert.deepEqual(overviewLevel(descriptor(authored)), { name: 'Local Group', description: 'Our galaxy group.',
+      order: 2, zoom, holds: [{ classifications: ['galaxy'], list: 'Galaxies' }], packages: [] });
   });
 
   it('places a package with a volume at its origin', () => {
-    assert.deepEqual(overviewEntry(descriptor(authored, { volume: { originM: [1, 2, 3] } }), 'sun')?.originM, [1, 2, 3]);
+    assert.deepEqual(overviewLevel(descriptor(authored, { volume: { originM: [1, 2, 3] } }))?.originM, [1, 2, 3]);
   });
 
   it('leaves a package without one out', () => {
-    assert.equal(overviewEntry({ schema: 'cssearth-object@2', id: 'm31', type: 'x', properties: {} }, 'sun'), null);
+    assert.equal(overviewLevel({ schema: 'cssearth-object@2', id: 'm31', type: 'x', properties: {} }), null);
   });
 
   it('refuses an incomplete overview, naming the package', () => {
-    assert.throws(() => overviewEntry(descriptor({ ...authored, description: undefined }), 'sun'), /local-group/);
-    assert.throws(() => overviewEntry(descriptor({ ...authored, order: 0 }), 'sun'), /order from 1/);
-    assert.throws(() => overviewEntry(descriptor({ ...authored, colour: 'red' }), 'sun'), /names only its name/);
+    assert.throws(() => overviewLevel(descriptor({ ...authored, description: undefined })), /local-group/);
+    assert.throws(() => overviewLevel(descriptor({ ...authored, order: 0 })), /order from 1/);
+    assert.throws(() => overviewLevel(descriptor({ ...authored, colour: 'red' })), /names only its name/);
   });
 
-  it('refuses a zoom ladder distance or frame outside its vocabulary, naming the field', () => {
-    assert.throws(() => defineOverview(entry({ zoom: { ...zoom, enter: { distancePc: -1 } } })), /local-group zoom\.enter/);
-    assert.throws(() => defineOverview(entry({ zoom: { ...zoom, returnBelow: { fade: 'galaxy', at: 'edge' } } })), /zoom\.returnBelow/);
-    assert.throws(() => defineOverview(entry({ zoom: { ...zoom, frame: { fit: 'everything' } } })), /zoom\.frame/);
-    assert.deepEqual(defineOverview(entry({ zoom: { ...zoom, frame: { between: [{ labels: 'galaxy-handoff-end' }, { fade: 'galaxy', at: 'middle' }] } } })).zoom.frame, { between: [{ labels: 'galaxy-handoff-end' }, { fade: 'galaxy', at: 'middle' }] });
+  it('leaves a placed level\'s name and description to its catalogue entry', () => {
+    const { name: _name, description: _description, ...ladder } = authored;
+    assert.equal(overviewLevel(descriptor(ladder, { catalog: {} }))?.name, undefined);
+    assert.throws(() => overviewLevel(descriptor(authored, { catalog: {} })), /leaves those to it/);
   });
 
-  it('refuses a holding that repeats a classification or has no classifications', () => {
-    assert.throws(() => defineOverview(entry({ holds: [{ classifications: ['nebula'] }, { classifications: ['nebula'] }] })), /repeats the classification nebula/);
-    assert.throws(() => defineOverview(entry({ holds: [{ classifications: [], list: 'Nothing' }] })), /holds\[0\]/);
+  it('refuses a zoom ladder distance or frame outside its vocabulary, naming the field', () => {
+    assert.throws(() => level({ zoom: { ...zoom, enter: { distancePc: -1 } } }), /local-group zoom\.enter/);
+    assert.throws(() => level({ zoom: { ...zoom, returnBelow: { fade: 'galaxy', at: 'edge' } } }), /zoom\.returnBelow/);
+    assert.throws(() => level({ zoom: { ...zoom, frame: { fit: 'everything' } } }), /zoom\.frame/);
+    assert.deepEqual(level({ zoom: { ...zoom, frame: { between: [{ labels: 'galaxy-handoff-end' }, { fade: 'galaxy', at: 'middle' }] } } }).zoom.frame, { between: [{ labels: 'galaxy-handoff-end' }, { fade: 'galaxy', at: 'middle' }] });
   });
 
-  it('refuses a prepared entry whose route is not its page', () => {
-    assert.throws(() => defineOverview(entry({ route: '/lg/' })), /route/);
+  it('refuses a holding that repeats a classification or has no classifications', () => {
+    assert.throws(() => level({ holds: [{ classifications: ['nebula'] }, { classifications: ['nebula'] }] }), /repeats the classification nebula/);
+    assert.throws(() => level({ holds: [{ classifications: [], list: 'Nothing' }] }), /holds\[0\]/);
   });
 
   it('finds the level that holds a classification', () => {
-    const levels = [defineOverview(entry({ id: 'milky-way', route: '/milky-way/', order: 1, holds: [{ classifications: ['nebula', 'star'] }] })),
-      defineOverview(entry({ holds: [{ classifications: ['galaxy'] }] }))];
+    const levels = [{ id: 'milky-way', ...level({ order: 1, holds: [{ classifications: ['nebula', 'star'] }] }) }, { id: 'local-group', ...level({ holds: [{ classifications: ['galaxy'] }] }) }];
     assert.equal(overviewHolding(levels, 'nebula')?.id, 'milky-way');
     assert.equal(overviewHolding(levels, 'galaxy')?.id, 'local-group');
     assert.equal(overviewHolding(levels, 'galaxy-cluster'), undefined);
diff --git a/packages/objects/src/registry/overview-object.ts b/packages/objects/src/registry/overview-object.ts
index 549b3eac956..659da4a5a5e 100644
--- a/packages/objects/src/registry/overview-object.ts
+++ b/packages/objects/src/registry/overview-object.ts
@@ -1,4 +1,7 @@
 import { isRecord } from '@cssearth/core';
+import type { ObjectClassification, ObjectWorldFrame } from './object-schema.js';
+import type { NavigationDistance } from './navigation-distance.js';
+import type { ObjectDiscovery } from './object-discovery.js';
 
 /**
  * A distance on the zoom ladder, measured from the star the zoom is centred on: a fixed distance, a point of the world
@@ -31,13 +34,11 @@ export interface OverviewZoom {
 export interface OverviewHolding { readonly classifications: readonly string[]; readonly list?: string }
 
 /**
- * A level above the star systems (the Milky Way, the Local Group, the nearby and the observable universe): an object of
- * the one registry whose page, `/<id>/`, is its host scene's with that overview selected. Like a catalogue focus it has
- * no scene of its own. Its package authors it under `properties.overview`; preparation adds the host and, for a package
- * with a volume, its origin.
+ * A level above the star systems (the Milky Way, the Local Group, the nearby and the observable universe). It is a view of
+ * a scene, not an object: the camera, far enough out from the star it is centred on, shows the level, and its page
+ * `/<id>/` is the world host's scene at that zoom. Its package authors it under `properties.overview`.
  */
 export interface OverviewObject {
-  readonly kind: 'overview';
   readonly id: string;
   readonly name: string;
   /** The card's introduction and the page's description. */
@@ -49,11 +50,17 @@ export interface OverviewObject {
   /** The context packages it draws besides its own (the stars of the Milky Way, the catalogue of galaxy clusters). */
   readonly packages: readonly string[];
   /** What it is as a member of a larger level (the Milky Way is a galaxy of the Local Group). */
-  readonly classification?: string;
+  readonly classification?: ObjectClassification;
+  readonly classificationLabel?: string;
   /** Where it is, for a level that is a member of another: its package's volume origin, Sun-centred ICRF metres. */
   readonly originM?: readonly [number, number, number];
+  /** A level with a catalogue entry (the Local Group) has a place of its own: the world context draws and names it. */
+  readonly worldFrame?: ObjectWorldFrame;
+  readonly systemName?: string;
+  readonly color?: string;
+  readonly distance?: NavigationDistance;
+  readonly discovery?: Readonly<ObjectDiscovery>;
   readonly route: string;
-  readonly sceneHostId: string;
 }
 
 const text = (value: unknown) => typeof value === 'string' && value.trim().length > 0;
@@ -100,42 +107,34 @@ function holds(value: unknown, at: string): readonly OverviewHolding[] {
   }));
 }
 
-const KEYS = ['kind', 'id', 'name', 'description', 'order', 'zoom', 'holds', 'packages', 'classification', 'originM', 'route', 'sceneHostId'];
-
-/** Decode a prepared overview entry, as `prepare:catalog` writes it. */
-export function defineOverview(input: unknown): OverviewObject {
-  const id = isRecord(input) ? String(input.id) : typeof input;
-  if (!isRecord(input) || !only(input, KEYS) || input.kind !== 'overview' || !identifier(input.id) || input.route !== `/${input.id}/`
-      || !text(input.name) || !text(input.description) || !Number.isSafeInteger(input.order) || Number(input.order) < 1
-      || !identifier(input.sceneHostId) || !Array.isArray(input.packages) || !input.packages.every(identifier)
-      || (input.classification !== undefined && !identifier(input.classification))
-      || (input.originM !== undefined && !(Array.isArray(input.originM) && input.originM.length === 3 && input.originM.every(Number.isFinite)))) {
-    throw new TypeError(`Invalid overview entry: ${id}; it needs a name, description, order from 1, zoom, holds, packages, its host and the route /<id>/, with an optional classification and originM of three numbers.`);
-  }
-  return Object.freeze({ kind: 'overview', id: input.id, name: input.name as string, description: input.description as string,
-    order: input.order as number, zoom: zoom(input.zoom, `${id} zoom`), holds: holds(input.holds, `${id} holds`),
-    packages: Object.freeze([...input.packages as string[]]),
-    ...(input.classification === undefined ? {} : { classification: input.classification as string }),
-    ...(input.originM === undefined ? {} : { originM: Object.freeze([...input.originM as number[]]) as unknown as readonly [number, number, number] }),
-    route: input.route, sceneHostId: input.sceneHostId as string });
-}
-
-/** The overview a package's descriptor authors (`properties.overview`), hosted by `sceneHostId`; null when it authors none.
- * A package with a volume is placed at its origin. */
-export function overviewEntry(descriptor: unknown, sceneHostId: string): OverviewObject | null {
+/** The level a package's descriptor authors under `properties.overview`: its zoom, what it holds and the packages it draws.
+ * Null when it authors none. A level that is not placed names itself and describes itself there; a placed one is named by
+ * its catalogue block. A package with a volume is at its origin. */
+export function overviewLevel(descriptor: unknown): { readonly name?: string; readonly description?: string; readonly order: number; readonly zoom: OverviewZoom;
+  readonly holds: readonly OverviewHolding[]; readonly packages: readonly string[]; readonly classification?: ObjectClassification;
+  readonly originM?: readonly [number, number, number] } | null {
   if (!isRecord(descriptor) || !isRecord(descriptor.properties) || descriptor.properties.overview === undefined) return null;
-  const overview = descriptor.properties.overview, volume = descriptor.properties.volume;
+  const overview = descriptor.properties.overview, volume = descriptor.properties.volume, id = String(descriptor.id);
   if (!isRecord(overview) || !only(overview, ['name', 'description', 'order', 'zoom', 'holds', 'packages', 'classification'])) {
-    throw new TypeError(`Invalid overview metadata: ${String(descriptor.id)}; it names only its name, description, order, zoom, holds, packages and classification.`);
+    throw new TypeError(`Invalid overview metadata: ${id}; it names only its name, description, order, zoom, holds, packages and classification.`);
+  }
+  const placed = descriptor.properties.catalog !== undefined;
+  const originM = isRecord(volume) ? volume.originM : undefined;
+  if ((placed ? overview.name !== undefined || overview.description !== undefined : !text(overview.name) || !text(overview.description))
+      || !Number.isSafeInteger(overview.order) || Number(overview.order) < 1
+      || (overview.packages !== undefined && !(Array.isArray(overview.packages) && overview.packages.every(identifier)))
+      || (overview.classification !== undefined && (placed || !identifier(overview.classification)))
+      || (originM !== undefined && !(Array.isArray(originM) && originM.length === 3 && originM.every(Number.isFinite)))) {
+    throw new TypeError(`Invalid overview metadata: ${id}; it needs an order from 1, zoom and holds, with optional packages; a level without a catalogue entry also names and describes itself and may state its classification, and one with a catalogue entry leaves those to it.`);
   }
-  return defineOverview({ kind: 'overview', id: descriptor.id, name: overview.name, description: overview.description, order: overview.order,
-    zoom: overview.zoom, holds: overview.holds, packages: overview.packages ?? [],
-    ...(overview.classification === undefined ? {} : { classification: overview.classification }),
-    ...(isRecord(volume) && volume.originM !== undefined ? { originM: volume.originM } : {}),
-    route: `/${String(descriptor.id)}/`, sceneHostId });
+  return Object.freeze({ ...(placed ? {} : { name: overview.name as string, description: overview.description as string }),
+    order: overview.order as number, zoom: zoom(overview.zoom, `${id} zoom`), holds: holds(overview.holds, `${id} holds`),
+    packages: Object.freeze([...(overview.packages ?? []) as string[]]),
+    ...(overview.classification === undefined ? {} : { classification: overview.classification as ObjectClassification }),
+    ...(originM === undefined ? {} : { originM: Object.freeze([...originM as number[]]) as unknown as readonly [number, number, number] }) });
 }
 
 /** The level that holds registry subjects of `classification`, among `overviews`; undefined when none does. */
-export function overviewHolding(overviews: readonly OverviewObject[], classification: string): OverviewObject | undefined {
+export function overviewHolding<Level extends Pick<OverviewObject, 'holds'>>(overviews: readonly Level[], classification: string): Level | undefined {
   return overviews.find(overview => overview.holds.some(group => group.classifications.includes(classification)));
 }
diff --git a/packages/objects/src/registry/prepared-focus-object.ts b/packages/objects/src/registry/prepared-focus-object.ts
deleted file mode 100644
index 2100b1566f0..00000000000
--- a/packages/objects/src/registry/prepared-focus-object.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-import { isRecord } from '@cssearth/core';
-import { parseNavigationDistance } from './navigation-distance.js';
-import type { NavigationDistance } from './navigation-distance.js';
-import type { ObjectEntry } from './object-schema.js';
-import type { OverviewObject } from './overview-object.js';
-
-export interface PreparedFocusObject {
-  readonly kind: 'prepared-focus';
-  readonly id: string;
-  readonly focusId: string;
-  readonly name: string;
-  readonly searchNames: readonly string[];
-  readonly classification: 'galaxy' | 'galaxy-cluster' | 'nebula' | 'globular-cluster';
-  readonly systemName: string;
-  readonly route: string;
-  readonly sceneHostId: string;
-  readonly distance: NavigationDistance;
-}
-/** Every entry of the one registry: a scene, or what a host scene draws without one (a catalogue focus, an overview). */
-export type NavigableObject<Scene = unknown, Signal = unknown> = ObjectEntry<Scene, Signal> | PreparedFocusObject | OverviewObject;
-export const isSceneObject = <Scene, Signal>(object: NavigableObject<Scene, Signal>): object is ObjectEntry<Scene, Signal> => object.kind === 'scene';
-
-/** A focus reuses its host scene and camera; it has no scene loader. */
-export function definePreparedFocus(input: unknown): PreparedFocusObject {
-  if (!isRecord(input) || Object.keys(input).some(key => !['kind', 'id', 'focusId', 'name', 'searchNames', 'classification', 'systemName', 'route', 'sceneHostId', 'distance'].includes(key)) ||
-      input.kind !== 'prepared-focus' || typeof input.id !== 'string' || !/^[A-Za-z0-9][A-Za-z0-9_.+-]*$/u.test(input.id) || input.focusId !== input.id ||
-      typeof input.sceneHostId !== 'string' || !/^[a-z][a-z0-9-]*$/u.test(input.sceneHostId) ||
-      input.route !== `/${input.id}/` ||
-      typeof input.name !== 'string' || !input.name || typeof input.systemName !== 'string' || !input.systemName ||
-      (input.classification !== 'galaxy' && input.classification !== 'galaxy-cluster' && input.classification !== 'nebula' && input.classification !== 'globular-cluster') ||
-      !Array.isArray(input.searchNames) || !input.searchNames.length || !input.searchNames.every(name => typeof name === 'string' && name)) {
-    throw new TypeError(`Invalid prepared focus destination: ${isRecord(input) ? String(input.id) : typeof input}; its route must be /<id>/ and its fields complete.`);
-  }
-  return Object.freeze({ kind: input.kind, id: input.id, focusId: input.id, name: input.name,
-    searchNames: Object.freeze([...input.searchNames]), classification: input.classification, systemName: input.systemName,
-    route: input.route, sceneHostId: input.sceneHostId, distance: parseNavigationDistance(input.distance) });
-}
diff --git a/packages/renderer/src/labels/universe-label-policy.ts b/packages/renderer/src/labels/universe-label-policy.ts
index e134d7c95d1..1ce32078792 100644
--- a/packages/renderer/src/labels/universe-label-policy.ts
+++ b/packages/renderer/src/labels/universe-label-policy.ts
@@ -52,7 +52,8 @@ export function labelImportance(kind: string, major = false, orientationReferenc
   if (featured && (kind === 'star' || kind === 'black-hole')) return FEATURED_STAR_TIER;
   // A planet of another star is a planet of its system: the tier is the body's role in the system it belongs to, not whether
   // that system is the Sun's. Without this an imaged exoplanet loses its caption at the scale that frames its own orbit.
-  if (['star', 'black-hole', 'planet', 'exoplanet', 'environment', 'galaxy-cluster'].includes(kind)) return 3;
+  // A galaxy, a nebula or a cluster is a named place of its scale, as a star is of the galaxy's.
+  if (['star', 'black-hole', 'planet', 'exoplanet', 'environment', 'galaxy', 'galaxy-cluster', 'nebula', 'globular-cluster'].includes(kind)) return 3;
   if (major || kind === 'dwarf-planet') return 2;
   if (kind === 'asteroid') return 0;
   return 1;
diff --git a/packages/renderer/src/navigation/index.ts b/packages/renderer/src/navigation/index.ts
index cf72b4da561..c92cc4e35c7 100644
--- a/packages/renderer/src/navigation/index.ts
+++ b/packages/renderer/src/navigation/index.ts
@@ -5,7 +5,6 @@ export { parsePreparedWorldCameraFrame } from '../validation/world-frame.js';
 export { worldCameraFromCenteredPresentation, worldCameraFromPresentation, presentWorldCamera, worldCameraViewport } from './world-camera.js';
 export { cssCameraAxesFromOrientation, cssViewFromOrientation, validateWorldReflection, worldQuaternionFromRotation, worldRotationFromQuaternion, rotateWorldPosition } from './world-camera-math.js';
 export type { PreparedWorldCameraFrame, WorldCameraPose, WorldCameraViewport } from './world-camera.js';
-export type { PreparedNavigationFocus, PreparedFocusFlightOptions } from './prepared-focus.js';
 export { createWorldSelectionTarget } from './selection-target.js';
 export { preparedDefaultViewRotation } from './prepared-arrival-view.js';
 export { savedWorldCamera } from './saved-world-camera.js';
diff --git a/packages/renderer/src/navigation/object-orbit.test.ts b/packages/renderer/src/navigation/object-orbit.test.ts
new file mode 100644
index 00000000000..78a4e897377
--- /dev/null
+++ b/packages/renderer/src/navigation/object-orbit.test.ts
@@ -0,0 +1,114 @@
+import { createCameraMotion } from './camera-motion.js';
+import { it } from 'node:test';
+import assert from 'node:assert/strict';
+import { isDeepStrictEqual } from 'node:util';
+import { getEventListeners } from 'node:events';
+import scene from '../../../../src/objects/mercury/prepared/scene.json' with { type: 'json' };
+import { createRetainedCubicSkyOrbit } from './object-orbit.js';
+import { createPerspectiveDolly } from './perspective-dolly.js';
+import { presentWorldCamera } from './world-camera.js';
+import { worldRotationCss, worldRotationFromQuaternion } from './world-camera-math.js';
+
+const frame = Object.freeze({ referenceFrame: 'sun-icrf', epochJdTt: 1, originM: [3e7, 4e7, 5e7] as const,
+  presentationToReference: [0,1,0,1,0,0,0,0,1], metersPerUnit: 2, bodyRadiusM: 200 });
+const optics = { focalPixels: 1000, principalOffsetPixels: [-170, 0] as const, framingRadiusPixels: 200 };
+
+function fixture(preparedSurfaceHitTest?: (clientX: number, clientY: number) => boolean, cameraPlan: any = scene.camera) {
+  class Surface extends EventTarget {
+    style: Record<string, any> = { setProperty() {}, removeProperty() {} };
+    dataset: Record<string, string> = {};
+    isConnected = true;
+    ownerDocument: any;
+    readonly x: number;
+    constructor(x = 0) { super(); this.x = x; }
+    getBoundingClientRect() { return { x: this.x, y: 0, left: this.x, top: 0, width: 1600, height: 900 }; }
+    system: { style: { transform: string } } | null = null;
+    querySelector() { return this.system; }
+  }
+  const frames = new Map<number, FrameRequestCallback>();
+  let nextFrame = 0, time = 0;
+  const view = Object.assign(new EventTarget(), { getComputedStyle: () => ({ perspective: '1000px', perspectiveOrigin: '800px 450px' }),
+    matchMedia: () => ({ matches: false }), performance: { now: () => time },
+    requestAnimationFrame(callback: FrameRequestCallback) { frames.set(++nextFrame, callback); return nextFrame; },
+    cancelAnimationFrame(id: number) { frames.delete(id); } });
+  const roots = [new Surface(), new Surface(170), new Surface(), new Surface()];
+  roots.forEach(root => { root.ownerDocument = { defaultView: view }; });
+  const [stage, cameraElement, sceneElement, skyElement] = roots;
+  let rotation = [1,0,0,0,1,0,0,0,1];
+  let physicalOwners = 0, publications = 0;
+  const callbacks: any = {};
+  const control = { stop() {}, destroy() {}, update() {}, stats: () => ({}), invalidateTrackball() {} };
+  const cameraMotion = createCameraMotion();
+  const orbit = createRetainedCubicSkyOrbit({ cameraMotion, stage, inputSurface: stage, cameraElement, sceneElement,
+    viewport: { read: () => ({ bounds: stage.getBoundingClientRect(), focalPixels: 1000, previewTop: null, openArea: null }), subscribe: () => () => {}, destroy() {} },
+    framePresenter: { present(request: any) { request.commit(); } },
+    worldContext: { frame, bodyRadiusUnits: 100, kilometersPerUnit: .002, maximumExtentUnits: 1e8 },
+    cameraPlan, objectId: 'unit', runtimePolicy: { MOBILE_VIEWPORT_QUERY: '(max-width: 500px)' },
+    preparedSurfaceHitTest,
+    onPublish() { publications++; }, onError(error: unknown) { throw error; },
+  } as any, { HTMLElement: Surface,
+    createPerspectiveDolly(options: any, orientation: any) { physicalOwners++; return createPerspectiveDolly(options, orientation); },
+    createCameraOrientation() {
+      return { scene: () => worldRotationCss(rotation), sceneMatrix: () => ({
+        m11: rotation[0], m21: rotation[1], m31: rotation[2], m12: rotation[3], m22: rotation[4], m32: rotation[5],
+        m13: rotation[6], m23: rotation[7], m33: rotation[8] }),
+      setSceneRotation(value: number[]) { rotation = [...value]; },
+      sunViewDirection: () => null,
+      snapshot: () => ({ schema: 'cssearth-camera-pose@2', scene: worldRotationCss(rotation) }),
+      captureCounterRotation: () => () => worldRotationCss(rotation),
+      restore(pose: any) { const m = pose.scene.slice(9,-1).split(',').map(Number); rotation = [m[0],m[4],m[8],m[1],m[5],m[9],m[2],m[6],m[10]]; },
+      rotate(delta: any) { if (!delta.rotation) return;
+        const next = worldRotationFromQuaternion(delta.rotation);
+        rotation = [0,1,2].flatMap(row => [0,1,2].map(column => [0,1,2].reduce((sum,k) => sum + next[row*3+k] * rotation[k*3+column], 0)));
+      } };
+    },
+    createUnboundedMatrixDragControls(options: any) { callbacks.drag = options; return control; },
+    createPreparedWheelZoomControls(options: any) { callbacks.wheel = options; return { ...control, stop() {}, destroy() {} }; },
+    bindResponsiveOrbitPolicy: () => ({ mobile: false, destroy() {} }),
+    selectPreparedResponsiveZoom: () => ({ zoom: 1, model: 'unit', widthShare: .5 }),
+  } as any);
+  const world = () => orbit.captureWorldCamera(frame);
+  let ticking: AbortSignal | undefined, started = 0;
+  const paint = () => { const pending = [...frames.values()]; frames.clear(); pending.forEach(callback => callback(time)); };
+  return { orbit, callbacks, roots, world, view,
+    get physicalOwners() { return physicalOwners; }, get publications() { return publications; },
+    tick(progress: number) {
+      if (ticking !== cameraMotion.signal) { ticking = cameraMotion.signal; started = time; paint(); }
+      time = started + progress * 1000; paint();
+    },
+  };
+}
+
+function close(actual: readonly number[], expected: readonly number[], tolerance = 1e-10) {
+  actual.forEach((value, axis) => assert.ok((Math.abs(value - expected[axis]) / Math.max(1, Math.abs(expected[axis]))) < tolerance));
+}
+
+it('uses prepared surface picking for detail flights', () => {
+  // The published level of detail gates picking; no lane needs to write `data-lod` on the stage.
+  const f = fixture((x, y) => x === 23 && y === 45);
+  const hit = f.callbacks.drag.surfaceFlyToHitTest;
+  assert.equal(hit(23, 45), true);
+  assert.equal(hit(24, 45), false);
+  f.orbit.destroy();
+});
+
+it('holds a pole-held drag to the body pole without a stage level-of-detail attribute', () => {
+  // Earth's paged globe writes no `data-lod`; its drags still turn about the system node's +Z pole.
+  const f = fixture(undefined, { ...scene.camera, drag: { model: 'pole-held-tumble' } });
+  f.roots[2]!.system = { style: { transform: 'rotateX(90deg)' } };
+  assert.equal(f.roots[0]!.dataset.lod, undefined);
+  const pole = f.callbacks.drag.trackballMetrics().pole;
+  assert.ok(Array.isArray(pole), 'pole-held drag lost its pole');
+  assert.ok(Math.abs(Math.hypot(...pole) - 1) < 1e-9);
+  f.orbit.destroy();
+});
+
+it('holds its last frame while a flight passes through the body, and still refuses a camera placed inside it', async () => {
+  const f = fixture();
+  const before = f.orbit.captureWorldCamera(frame);
+  const inside = { ...before, pose: { ...before.pose, positionM: [frame.originM[0] + 50, frame.originM[1], frame.originM[2]] as const } };
+  await f.orbit.applyWorldCamera(inside, frame, new AbortController().signal);
+  assert.deepEqual(f.orbit.captureWorldCamera(frame).pose.positionM, before.pose.positionM, 'the flight step inside the body is not adopted');
+  assert.throws(() => f.orbit.applyWorldCamera(inside, frame), /inside the focused body/u);
+  f.orbit.destroy();
+});
diff --git a/packages/renderer/src/navigation/object-orbit.ts b/packages/renderer/src/navigation/object-orbit.ts
index 9e0f3860b47..811b315d670 100644
--- a/packages/renderer/src/navigation/object-orbit.ts
+++ b/packages/renderer/src/navigation/object-orbit.ts
@@ -16,8 +16,6 @@ import { bindWorldCameraPicking } from './world-camera-picking.js';
 import { hitsProjectedBody } from './world-camera-hit.js';
 import { prepareSurfaceTargetRotation } from './surface-target.js';
 import type { PhysicalProjection } from '../prepared-data/physical-projection.js';
-import { prepareFocusFlight } from './prepared-focus.js';
-import type { PreparedNavigationFocus, PreparedFocusFlightOptions } from './prepared-focus.js';
 export interface OrbitStateUpdate { pitch?: number; controlPitch?: number; controlYaw?: number; zoom?: number; distance?: number; distanceKilometers?: number; bodyCenterKilometers?: PositionM; pose?: CameraPose; projectionScale?: number; }
 export type OrbitState = { pitch: number; controlPitch: number; controlYaw: number; zoom: number; pose: CameraPose } & ReturnType<PerspectiveDolly['state']>;
 export interface OrbitPublication extends CameraAngles { worldCamera: WorldCameraPose; sceneMatrix: string; sunViewDirection: Vector3 | null; skySunViewDirection: Vector3 | null; counterRotation: string; counterRotationFor(localMatrix: string | DOMMatrix | null): string; zoom: number; projection: PhysicalProjection; distance: number; focal: number; viewportWidth: number; viewportHeight: number; stageViewport: WorldCameraViewport; principalOffset: readonly number[]; body: PerspectivePublication['body']; levelOfDetail: ReturnType<PerspectiveDolly['levelOfDetail']>; }
@@ -216,10 +214,10 @@ export function createRetainedCubicSkyOrbit({
     (x, y) => lodStage() === 'geometry' && surfaceHitTest(x, y)));
   // Every prepared body draws its system node first under the scene, with the body's north pole on its +Z axis. Drags
   // turn about that pole when the plan's drag model is "pole-held-tumble" (Earth's recipe) and the mesh is drawn; other
-  // bodies, the same body as a billboard or dot, and a focused neighbour keep the screen axes.
+  // bodies and the same body as a billboard or dot keep the screen axes.
   const poleHeld = cameraPlan.drag?.model === 'pole-held-tumble';
   const bodyPole = (): { pole?: Vector3 } => {
-    if (!poleHeld || lodStage() !== 'geometry' || camera.focus()) return {};
+    if (!poleHeld || lodStage() !== 'geometry') return {};
     const system = sceneElement.querySelector<HTMLElement>(':scope > .polycss-mesh');
     if (!system) return {};
     const m = multiplyPreparedMatrix4(readPreparedMatrix4(camera.scene()), readPreparedTransform(system.style.transform || 'none'));
@@ -237,11 +235,11 @@ export function createRetainedCubicSkyOrbit({
     rotate: publishCameraDelta,
     minimumZoom: minimumZoom(),
     maximumZoom: maximumZoom(),
-    surfaceFlyToHitTest: (clientX, clientY) => !camera.focus() && surfaceHitTest(clientX, clientY),
+    surfaceFlyToHitTest: surfaceHitTest,
     // The prepared wheel dolly: the eye moves along its axis, with no
     // surface anchor to hold.
     dolly: Object.freeze({ stepPerDelta: cameraPlan.dolly.wheelStepPerDelta,
-      minimumDistance: () => camera.inputMinimumDistance() }),
+      minimumDistance: () => camera.minimumDistance() }),
     onStart() {
       interactionStarts += 1;
       onInteractionStart();
@@ -300,27 +298,6 @@ export function createRetainedCubicSkyOrbit({
     initialResponsiveZoom: () => initialResponsiveZoom,
     currentResponsiveZoom: () => responsiveFit.zoom,
     setZoomOutCentering(enabled: boolean) { camera.setZoomOutCentering(enabled); },
-    preparedFocus: () => camera.focus() ?? null,
-    setPreparedFocus(focus: PreparedNavigationFocus | null, frame: PreparedWorldCameraFrame) {
-      if (lifetime.disposed) return;
-      validateWorldFrame(frame);
-      cameraMotion.cancel();
-      controls.stop();
-      camera.setFocus(focus, frame);
-      publish();
-    },
-    async flyToPreparedFocus(focus: PreparedNavigationFocus, frame: PreparedWorldCameraFrame,
-      viewport: WorldCameraViewport & { framingRadiusPixels: number }, options: PreparedFocusFlightOptions = {}) {
-      if (lifetime.disposed) return Promise.resolve({ completed: false });
-      validateWorldFrame(frame);
-      if (options.signal?.aborted) return Promise.resolve({ completed: false });
-      const plan = prepareFocusFlight(camera, focus, frame, viewport, options.durationMilliseconds);
-      cameraMotion.cancel(); controls.stop();
-      camera.setFocus(plan.focus, frame);
-      publish();
-      const reduced = options.reducedMotion ?? windowTarget.matchMedia('(prefers-reduced-motion: reduce)').matches;
-      return flyCamera(plan.sample, reduced ? 0 : plan.durationMilliseconds, options.signal);
-    },
     captureWorldCamera(frame: PreparedWorldCameraFrame): WorldCameraPose {
       validateWorldFrame(frame);
       return camera.capture(frame);
@@ -342,7 +319,6 @@ export function createRetainedCubicSkyOrbit({
       if (![controlPitch, controlYaw, controlRoll, zoom].every(Number.isFinite)) throw new TypeError("Invalid prepared camera destination.");
       cameraMotion.cancel();
       controls.stop();
-      camera.clearFocus();
       const start = { ...camera.state };
       const targetZoom = transition?.preserveZoom ? start.zoom : clamp(zoom, minimumZoom(), maximumZoom());
       const viewport = perspective.viewport();
@@ -443,7 +419,6 @@ export function createRetainedCubicSkyOrbit({
         responsiveWidthShare: responsiveFit.widthShare,
         responsiveBaseZoom: responsiveFit.zoom,
         publications,
-        preparedFocusId: camera.focus()?.id ?? null,
         flightActive: cameraMotion.signal !== undefined,
         framePublication: publicationState(),
         interactionStarts,
diff --git a/packages/renderer/src/navigation/perspective-dolly.ts b/packages/renderer/src/navigation/perspective-dolly.ts
index c585e216c07..be2250b0c82 100644
--- a/packages/renderer/src/navigation/perspective-dolly.ts
+++ b/packages/renderer/src/navigation/perspective-dolly.ts
@@ -365,7 +365,7 @@ export function createPerspectiveDolly({
       );
       const opticalCenterX = bounds.x + bounds.width / 2 + principalOffset[0]!;
       const opticalCenterY = bounds.y + bounds.height / 2 + principalOffset[1]!;
-      return camera.trackball(Object.freeze({
+      return Object.freeze({
         centerX,
         centerY,
         opticalCenterX,
@@ -380,7 +380,7 @@ export function createPerspectiveDolly({
         viewportCenterY: (stageBounds.top ?? 0) + stageBounds.height / 2,
         // Pointer samples are re-based to the centre: tumble everywhere.
         tumbleOnly: TUMBLE_DRAG_MODELS.includes(cameraPlan.drag?.model ?? ""),
-      }));
+      });
     },
     state() {
       const { distance, bodyCenterKilometers } = camera.detailState();
diff --git a/packages/renderer/src/navigation/prepared-camera.ts b/packages/renderer/src/navigation/prepared-camera.ts
index 9ddfc19b199..971094bba28 100644
--- a/packages/renderer/src/navigation/prepared-camera.ts
+++ b/packages/renderer/src/navigation/prepared-camera.ts
@@ -6,8 +6,6 @@ import { distanceForSilhouetteRadius, rotationFromMatrix3d, silhouetteRadiusAtDi
 import { cameraProjectionScale, worldCameraViewport, presentWorldCamera, worldCameraFromCenteredPresentation, worldCameraFromPresentation } from './world-camera.js';
 import type { PreparedWorldCameraFrame, WorldCameraPose, WorldCameraViewport } from './world-camera.js';
 import { rotateWorldPosition, scaleWorldPosition, transposeWorldRotation, validateWorldPosition } from './world-camera-math.js';
-import { validatePreparedNavigationFocus } from './prepared-focus.js';
-import type { PreparedNavigationFocus } from './prepared-focus.js';
 import type { PerspectiveWorldContext } from './perspective-dolly.js';
 import type { Vector3 } from './types.js';
 import { clamp } from '@cssearth/core';
@@ -127,8 +125,6 @@ export function createPreparedCamera(cameraPlan: PerspectiveCameraPlan, worldCon
     cameraState.distance = distance;
     aliasZoom = null;
   }
-  let active: { focus: PreparedNavigationFocus; frame: PreparedWorldCameraFrame;
-    offsetUnits: PositionM; rotatedOffset: PositionM; centerUnits: PositionM } | null = null;
   function capture(frame: PreparedWorldCameraFrame): WorldCameraPose {
     const rotation = readRotation(), bodyCenterUnits = bodyCenter;
     return bodyCenterUnits === null
@@ -144,63 +140,8 @@ export function createPreparedCamera(cameraPlan: PerspectiveCameraPlan, worldCon
     const presentation = presentWorldCamera(world, frame, optics());
     setBodyCenter(presentation.bodyCenterUnits);
     orientation.setSceneRotation(presentation.rotation);
-    if (active) {
-      active.rotatedOffset = rotateWorldPosition(presentation.rotation, active.offsetUnits);
-      active.centerUnits = add(presentation.bodyCenterUnits, active.rotatedOffset);
-    }
-  }
-  function preservePivot() {
-    if (!active) return;
-    const nextOffset = rotateWorldPosition(readRotation(), active.offsetUnits);
-    // Apply only the changed pivot offset. Subtracting two galaxy-scale positions
-    // when the rotation is unchanged would erase a nearby detail's metre-scale eye.
-    if (nextOffset.some((value, axis) => value !== active!.rotatedOffset[axis])) {
-      setBodyCenter(add(bodyCenter!, subtract(active.rotatedOffset, nextOffset)));
-      active.rotatedOffset = nextOffset;
-    }
-  }
-  function set(focus: PreparedNavigationFocus | null, frame: PreparedWorldCameraFrame) {
-    if (focus === null) { active = null; return; }
-    const validated = validatePreparedNavigationFocus(focus);
-    const presentation = presentWorldCamera(capture(frame), frame, optics());
-    const offsetUnits = scaleWorldPosition(rotateWorldPosition(transposeWorldRotation(frame.presentationToReference),
-      subtract(validated.positionM, frame.originM)), 1 / frame.metersPerUnit);
-    const rotatedOffset = rotateWorldPosition(presentation.rotation, offsetUnits);
-    const centerUnits = add(presentation.bodyCenterUnits, rotatedOffset);
-    if (!(Math.hypot(...centerUnits) > 0)) throw new RangeError('The observer cannot orbit from the prepared focus centre.');
-    // Materialise a centred detail dolly before changing its input pivot.
-    setBodyCenter(presentation.bodyCenterUnits);
-    active = { focus: validated, frame, offsetUnits, rotatedOffset, centerUnits };
-    preservePivot();
-  }
-  const focusZoom = () => {
-    if (!active) return detailState().zoom;
-    const distanceM = Math.hypot(...active.centerUnits) * active.frame.metersPerUnit;
-    // A framing bound is not a solid body: this alias remains defined inside it.
-    return Math.min(cameraPlan.maximumZoom, optics().focalPixels * active.focus.framingRadiusM /
-      distanceM * 2 / cameraPlan.logicalBodyDiameter * framingReferenceZoom);
-  };
-  function inputState() {
-    return active ? { ...detailState(), distance: Math.hypot(...active.centerUnits), zoom: focusZoom() } : detailState();
-  }
-  function updateInput(partial: CameraUpdate) {
-    if (!active) { updateDetail(partial); return; }
-    const oldDistance = Math.hypot(...active.centerUnits);
-    const requested = partial.distanceKilometers !== undefined ? partial.distanceKilometers * 1000 / active.frame.metersPerUnit
-      : partial.distance ?? (partial.zoom === undefined ? oldDistance : oldDistance * focusZoom() / partial.zoom);
-    if (!Number.isFinite(requested) || requested <= 0) throw new TypeError('Prepared focus distance must be positive and finite.');
-    const { minimumDistanceM, maximumDistanceM } = active.focus.limits;
-    // Restored observers outside the authored interval remain stationary until dolly input.
-    if (requested !== oldDistance) {
-      const next = Math.max(Math.min(minimumDistanceM / active.frame.metersPerUnit, oldDistance),
-        Math.min(Math.max(maximumDistanceM / active.frame.metersPerUnit, oldDistance), requested));
-      const nextCenter = scaleWorldPosition(active.centerUnits, next / oldDistance);
-      setBodyCenter(add(bodyCenter!, subtract(nextCenter, active.centerUnits)));
-      active.centerUnits = nextCenter;
-    }
-    updateDetail({ ...(partial.rotX === undefined ? {} : { rotX: partial.rotX }),
-      ...(partial.rotY === undefined ? {} : { rotY: partial.rotY }) });
   }
+  const inputState = detailState, updateInput = updateDetail;
   return Object.freeze({
     get projectionScale() { return projectionScale; },
     setProjectionScale(value: number) { projectionScale = cameraProjectionScale(value); aliasZoom = null; },
@@ -212,16 +153,14 @@ export function createPreparedCamera(cameraPlan: PerspectiveCameraPlan, worldCon
         rotY: inputState().rotY + delta.controlYawDelta, zoom: delta.zoom, distance: delta.distance });
       orientation.rotate({ renderedPitchDelta: preparedScenePitch(inputState().rotX, cameraPlan) - preparedScenePitch(previousPitch, cameraPlan),
         yawDelta: delta.controlYawDelta, rotation: delta.rotation });
-      preservePivot();
     },
-    rebaseScene(change: DOMMatrix) { orientation.rebaseScene(change); preservePivot(); },
+    rebaseScene(change: DOMMatrix) { orientation.rebaseScene(change); },
     prepareFlight(target: CameraAngles, correction?: DOMMatrix) {
       const flight = orientation.prepareFlight(target, correction);
       return { angularDistance: flight.angularDistance,
-        sample(progress: number, update: CameraUpdate) { updateInput(update); flight.sample(progress); preservePivot(); } };
+        sample(progress: number, update: CameraUpdate) { updateInput(update); flight.sample(progress); } };
     },
     restore(update: CameraUpdate, pose?: CameraPose, bodyCenterKilometers?: PositionM) {
-      active = null;
       const resetsOrientation = update.rotX !== undefined || update.rotY !== undefined;
       if (resetsOrientation || pose !== undefined) bodyCenter = null;
       updateDetail(update);
@@ -234,8 +173,6 @@ export function createPreparedCamera(cameraPlan: PerspectiveCameraPlan, worldCon
     bodyCenter: () => bodyCenter,
     setZoomOutCentering(enabled: boolean) { zoomOutCentering = enabled; },
     minimumZoom, maximumZoom, minimumDistance, maximumDistance,
-    /** The closest view input may dolly to, in the units of `state.distance`: a focus's own limit, else the body's. */
-    inputMinimumDistance: () => active ? active.focus.limits.minimumDistanceM / active.frame.metersPerUnit : minimumDistance(),
     /** Only the original centred framing follows a resize; a restored observer stays put. */
     reframe(zoom: number) { if (bodyCenter === null) updateDetail({ zoom }); },
     detailState() {
@@ -250,19 +187,6 @@ export function createPreparedCamera(cameraPlan: PerspectiveCameraPlan, worldCon
         sunDirection: orientation.sunViewDirection(), counterRotationFor: orientation.captureCounterRotation() };
     },
     adopt, contains,
-    setFocus: set,
-    focus: () => active?.focus ?? null,
-    clearFocus() { active = null; },
-    trackball(base: TrackballMetrics): TrackballMetrics {
-      if (!active) return base;
-      const [x, y, z] = active.centerUnits, depth = -z;
-      const visible = depth > 0;
-      const radius = Math.max(base.viewportWidth / 5, Math.min(base.viewportWidth,
-        visible ? base.focalLength * active.focus.framingRadiusM / active.frame.metersPerUnit / depth : 0));
-      return { ...base, centerX: visible ? (base.opticalCenterX ?? base.centerX) + base.focalLength * x / depth : base.viewportCenterX ?? base.centerX,
-        centerY: visible ? (base.opticalCenterY ?? base.centerY) + base.focalLength * y / depth : base.viewportCenterY ?? base.centerY,
-        radius, surfaceRadius: radius };
-    },
   });
 }
 function add(a: PositionM, b: PositionM): PositionM { return [a[0] + b[0], a[1] + b[1], a[2] + b[2]]; }
diff --git a/packages/renderer/src/navigation/prepared-focus.test.ts b/packages/renderer/src/navigation/prepared-focus.test.ts
deleted file mode 100644
index fabf1f6ed99..00000000000
--- a/packages/renderer/src/navigation/prepared-focus.test.ts
+++ /dev/null
@@ -1,234 +0,0 @@
-import { createCameraMotion } from './camera-motion.js';
-import { it } from 'node:test';
-import assert from 'node:assert/strict';
-import { isDeepStrictEqual } from 'node:util';
-import { getEventListeners } from 'node:events';
-import scene from '../../../../src/objects/mercury/prepared/scene.json' with { type: 'json' };
-import { createRetainedCubicSkyOrbit } from './object-orbit.js';
-import { createPerspectiveDolly } from './perspective-dolly.js';
-import { presentWorldCamera } from './world-camera.js';
-import { worldRotationCss, worldRotationFromQuaternion } from './world-camera-math.js';
-import type { PreparedNavigationFocus } from './prepared-focus.js';
-
-const frame = Object.freeze({ referenceFrame: 'sun-icrf', epochJdTt: 1, originM: [3e7, 4e7, 5e7] as const,
-  presentationToReference: [0,1,0,1,0,0,0,0,1], metersPerUnit: 2, bodyRadiusM: 200 });
-const focus: PreparedNavigationFocus = { id: 'catalogue:7', positionM: [1e20, 2e20, -3e20], framingRadiusM: 1e18,
-  limits: { minimumDistanceM: 1e13, maximumDistanceM: 1e22 }, upReference: [0, 0, 1], arrivalDistanceM: 4e18 };
-const optics = { focalPixels: 1000, principalOffsetPixels: [-170, 0] as const, framingRadiusPixels: 200 };
-
-function fixture(preparedSurfaceHitTest?: (clientX: number, clientY: number) => boolean, cameraPlan: any = scene.camera) {
-  class Surface extends EventTarget {
-    style: Record<string, any> = { setProperty() {}, removeProperty() {} };
-    dataset: Record<string, string> = {};
-    isConnected = true;
-    ownerDocument: any;
-    readonly x: number;
-    constructor(x = 0) { super(); this.x = x; }
-    getBoundingClientRect() { return { x: this.x, y: 0, left: this.x, top: 0, width: 1600, height: 900 }; }
-    system: { style: { transform: string } } | null = null;
-    querySelector() { return this.system; }
-  }
-  const frames = new Map<number, FrameRequestCallback>();
-  let nextFrame = 0, time = 0;
-  const view = Object.assign(new EventTarget(), { getComputedStyle: () => ({ perspective: '1000px', perspectiveOrigin: '800px 450px' }),
-    matchMedia: () => ({ matches: false }), performance: { now: () => time },
-    requestAnimationFrame(callback: FrameRequestCallback) { frames.set(++nextFrame, callback); return nextFrame; },
-    cancelAnimationFrame(id: number) { frames.delete(id); } });
-  const roots = [new Surface(), new Surface(170), new Surface(), new Surface()];
-  roots.forEach(root => { root.ownerDocument = { defaultView: view }; });
-  const [stage, cameraElement, sceneElement, skyElement] = roots;
-  let rotation = [1,0,0,0,1,0,0,0,1];
-  let physicalOwners = 0, publications = 0;
-  const callbacks: any = {};
-  const control = { stop() {}, destroy() {}, update() {}, stats: () => ({}), invalidateTrackball() {} };
-  const cameraMotion = createCameraMotion();
-  const orbit = createRetainedCubicSkyOrbit({ cameraMotion, stage, inputSurface: stage, cameraElement, sceneElement,
-    viewport: { read: () => ({ bounds: stage.getBoundingClientRect(), focalPixels: 1000, previewTop: null, openArea: null }), subscribe: () => () => {}, destroy() {} },
-    framePresenter: { present(request: any) { request.commit(); } },
-    worldContext: { frame, bodyRadiusUnits: 100, kilometersPerUnit: .002, maximumExtentUnits: 1e8 },
-    cameraPlan, objectId: 'unit', runtimePolicy: { MOBILE_VIEWPORT_QUERY: '(max-width: 500px)' },
-    preparedSurfaceHitTest,
-    onPublish() { publications++; }, onError(error: unknown) { throw error; },
-  } as any, { HTMLElement: Surface,
-    createPerspectiveDolly(options: any, orientation: any) { physicalOwners++; return createPerspectiveDolly(options, orientation); },
-    createCameraOrientation() {
-      return { scene: () => worldRotationCss(rotation), sceneMatrix: () => ({
-        m11: rotation[0], m21: rotation[1], m31: rotation[2], m12: rotation[3], m22: rotation[4], m32: rotation[5],
-        m13: rotation[6], m23: rotation[7], m33: rotation[8] }),
-      setSceneRotation(value: number[]) { rotation = [...value]; },
-      sunViewDirection: () => null,
-      snapshot: () => ({ schema: 'cssearth-camera-pose@2', scene: worldRotationCss(rotation) }),
-      captureCounterRotation: () => () => worldRotationCss(rotation),
-      restore(pose: any) { const m = pose.scene.slice(9,-1).split(',').map(Number); rotation = [m[0],m[4],m[8],m[1],m[5],m[9],m[2],m[6],m[10]]; },
-      rotate(delta: any) { if (!delta.rotation) return;
-        const next = worldRotationFromQuaternion(delta.rotation);
-        rotation = [0,1,2].flatMap(row => [0,1,2].map(column => [0,1,2].reduce((sum,k) => sum + next[row*3+k] * rotation[k*3+column], 0)));
-      } };
-    },
-    createUnboundedMatrixDragControls(options: any) { callbacks.drag = options; return control; },
-    createPreparedWheelZoomControls(options: any) { callbacks.wheel = options; return { ...control, stop() {}, destroy() {} }; },
-    bindResponsiveOrbitPolicy: () => ({ mobile: false, destroy() {} }),
-    selectPreparedResponsiveZoom: () => ({ zoom: 1, model: 'unit', widthShare: .5 }),
-  } as any);
-  const world = () => orbit.captureWorldCamera(frame);
-  const range = (point = focus.positionM) => Math.hypot(...world().pose.positionM.map((v, axis) => v - point[axis]));
-  const focusView = () => presentWorldCamera(world(), { ...frame, originM: focus.positionM, bodyRadiusM: focus.framingRadiusM }, optics);
-  let ticking: AbortSignal | undefined, started = 0;
-  const paint = () => { const pending = [...frames.values()]; frames.clear(); pending.forEach(callback => callback(time)); };
-  return { orbit, callbacks, roots, world, range, focusView, view,
-    get physicalOwners() { return physicalOwners; }, get publications() { return publications; },
-    tick(progress: number) {
-      if (ticking !== cameraMotion.signal) { ticking = cameraMotion.signal; started = time; paint(); }
-      time = started + progress * 1000; paint();
-    },
-  };
-}
-
-function close(actual: readonly number[], expected: readonly number[], tolerance = 1e-10) {
-  actual.forEach((value, axis) => assert.ok((Math.abs(value - expected[axis]) / Math.max(1, Math.abs(expected[axis]))) < tolerance));
-}
-
-it('uses prepared surface picking for detail flights and suppresses them while a catalogue focus owns input', () => {
-  // The published level of detail gates picking; no lane needs to write `data-lod` on the stage.
-  const f = fixture((x, y) => x === 23 && y === 45);
-  const hit = f.callbacks.drag.surfaceFlyToHitTest;
-  assert.equal(hit(23, 45), true);
-  assert.equal(hit(24, 45), false);
-  f.orbit.setPreparedFocus(focus, frame);
-  assert.equal(hit(23, 45), false);
-  f.orbit.setPreparedFocus(null, frame);
-  assert.equal(hit(23, 45), true);
-  f.orbit.destroy();
-});
-
-it('holds a pole-held drag to the body pole without a stage level-of-detail attribute', () => {
-  // Earth's paged globe writes no `data-lod`; its drags still turn about the system node's +Z pole.
-  const f = fixture(undefined, { ...scene.camera, drag: { model: 'pole-held-tumble' } });
-  f.roots[2]!.system = { style: { transform: 'rotateX(90deg)' } };
-  assert.equal(f.roots[0]!.dataset.lod, undefined);
-  const pole = f.callbacks.drag.trackballMetrics().pole;
-  assert.ok(Array.isArray(pole), 'pole-held drag lost its pole');
-  assert.ok(Math.abs(Math.hypot(...pole) - 1) < 1e-9);
-  f.orbit.destroy();
-});
-
-it('flies, drags and dollies around a prepared focus while retaining the original detail frame and camera', async () => {
-  const f = fixture(), roots = [...f.roots], initial = f.world();
-  const flight = f.orbit.flyToPreparedFocus(focus, frame, optics, { durationMilliseconds: 1000 });
-  assert.equal(f.orbit.preparedFocus()?.id, focus.id);
-  close(f.world().pose.positionM, initial.pose.positionM);
-  f.tick(.35);
-  assert.notDeepEqual(f.world().pose.positionM, initial.pose.positionM);
-  assert.ok(f.range() > focus.arrivalDistanceM!);
-  f.tick(1);
-  assert.deepEqual((await flight), { completed: true });
-  assert.ok(Math.abs((f.range() / focus.arrivalDistanceM!) - (1)) < 10 ** -12 / 2, `${(f.range() / focus.arrivalDistanceM!)} is not close to ${1}`);
-  const arrived = f.focusView().centerPixels!;
-  close(arrived, [0,0], 1e-9);
-  const oldDetailRange = f.range(frame.originM);
-  f.callbacks.drag.rotate({ controlPitchDelta: 0, controlYawDelta: 45, rotation: [0, Math.sin(Math.PI/8), 0, Math.cos(Math.PI/8)] });
-  assert.ok(Math.abs((f.range() / focus.arrivalDistanceM!) - (1)) < 10 ** -12 / 2, `${(f.range() / focus.arrivalDistanceM!)} is not close to ${1}`);
-  close(f.focusView().centerPixels!, arrived, 1e-9);
-  assert.notEqual(f.range(frame.originM), oldDetailRange);
-  const metrics = f.callbacks.drag.trackballMetrics();
-  assert.ok(Math.abs(metrics.centerX - (970)) < 10 ** -8 / 2, `${metrics.centerX} is not close to ${970}`);
-  assert.ok(Math.abs(metrics.centerY - (450)) < 10 ** -8 / 2, `${metrics.centerY} is not close to ${450}`);
-  const distance = f.callbacks.wheel.camera.state.distance;
-  f.callbacks.wheel.rotate({ controlPitchDelta: 0, controlYawDelta: 0, distance: distance * 2 });
-  assert.ok(Math.abs((f.range() / (focus.arrivalDistanceM! * 2)) - (1)) < 10 ** -12 / 2, `${(f.range() / (focus.arrivalDistanceM! * 2))} is not close to ${1}`);
-  close(f.focusView().centerPixels!, arrived, 1e-9);
-  f.callbacks.wheel.rotate({ controlPitchDelta: 0, controlYawDelta: 0, distance: 1e30 });
-  assert.ok(Math.abs((f.range() / focus.limits.maximumDistanceM) - (1)) < 10 ** -12 / 2, `${(f.range() / focus.limits.maximumDistanceM)} is not close to ${1}`);
-  assert.ok(Math.abs((f.orbit.sharedState().distanceKilometers! * 1000 / f.range(frame.originM)) - (1)) < 10 ** -12 / 2, `${(f.orbit.sharedState().distanceKilometers! * 1000 / f.range(frame.originM))} is not close to ${1}`);
-  assert.equal(f.physicalOwners, 1);
-  assert.deepEqual(f.roots, roots);
-  assert.deepEqual(frame.originM, [3e7,4e7,5e7]);
-  assert.ok(f.publications > 5);
-  f.orbit.destroy();
-});
-
-it('restores a focus without moving the saved world pose, then clears it without a jump on return', async () => {
-  const f = fixture();
-  await f.orbit.flyToPreparedFocus(focus, frame, optics, { reducedMotion: true });
-  const saved = f.orbit.sharedState(), before = f.world();
-  f.orbit.setState(saved);
-  assert.equal(f.orbit.preparedFocus(), null);
-  f.orbit.setPreparedFocus(focus, frame);
-  close(f.world().pose.positionM, before.pose.positionM);
-  close(f.world().pose.orientationXyzw, before.pose.orientationXyzw);
-  const translated = { ...before, pose: { ...before.pose, positionM: before.pose.positionM.map((v, i) => v + (i === 0 ? 1e18 : 0)) as any } };
-  f.orbit.applyWorldCamera(translated, frame);
-  close(f.world().pose.positionM, translated.pose.positionM);
-  const currentRange = f.range();
-  f.callbacks.wheel.rotate({ controlPitchDelta: 0, controlYawDelta: 0, distance: f.callbacks.wheel.camera.state.distance * .9 });
-  assert.ok(Math.abs((f.range() / currentRange) - (.9)) < 10 ** -12 / 2, `${(f.range() / currentRange)} is not close to ${.9}`);
-  const returnStart = f.world();
-  f.orbit.setPreparedFocus(null, frame);
-  close(f.world().pose.positionM, returnStart.pose.positionM);
-  const detailRange = f.range(frame.originM);
-  f.callbacks.drag.rotate({ controlPitchDelta: 0, controlYawDelta: 30, rotation: [0, Math.sin(Math.PI/12), 0, Math.cos(Math.PI/12)] });
-  assert.ok(Math.abs((f.range(frame.originM) / detailRange) - (1)) < 10 ** -12 / 2, `${(f.range(frame.originM) / detailRange)} is not close to ${1}`);
-  assert.ok(!(Math.abs((f.range() / currentRange) - (.9)) < 10 ** -3 / 2));
-  f.orbit.destroy();
-});
-
-it('uses the retained motion owner for interruption, replacement and teardown, rejecting invalid focus before moving', async () => {
-  const f = fixture(), controller = new AbortController();
-  const pending = f.orbit.flyToPreparedFocus(focus, frame, optics, { signal: controller.signal, durationMilliseconds: 1000 });
-  f.tick(.2);
-  const interrupted = f.world();
-  controller.abort();
-  assert.deepEqual((await pending), { completed: false });
-  assert.equal(getEventListeners(controller.signal, 'abort').length, 0);
-  close(f.world().pose.positionM, interrupted.pose.positionM);
-  assert.equal(f.orbit.preparedFocus()?.id, focus.id);
-  await assert.rejects(f.orbit.flyToPreparedFocus({ ...focus, limits: { minimumDistanceM: 1, maximumDistanceM: 0 } }, frame, optics), /metadata/);
-  close(f.world().pose.positionM, interrupted.pose.positionM);
-  const replacement = f.orbit.flyToPreparedFocus(focus, frame, optics, { durationMilliseconds: 1000 });
-  // Catalogue ids such as the dwarf galaxy dw1343+58 carry a plus sign.
-  const final = f.orbit.flyToPreparedFocus({ ...focus, id: 'dw1343+58', positionM: [2e20, -1e20, 3e20] }, frame, optics);
-  assert.deepEqual((await replacement), { completed: false });
-  f.orbit.destroy();
-  assert.deepEqual((await final), { completed: false });
-  for (const name of ['pointerdown','pointermove','pointerup','wheel','resize']) assert.equal(getEventListeners(f.view, name).length, 0);
-});
-
-it('arrives on the line of sight from the Sun, celestial north up, whatever the previous view faced', async () => {
-  const poses = [];
-  for (const turned of [false, true]) {
-    const f = fixture();
-    // Face the opposite way first: the Crab bug arrived behind its nebula, looking back at the Sun.
-    if (turned) f.callbacks.drag.rotate({ controlPitchDelta: 0, controlYawDelta: 180, rotation: [0, 1, 0, 0] });
-    const flight = f.orbit.flyToPreparedFocus(focus, frame, optics, { durationMilliseconds: 1000 });
-    f.tick(1);
-    assert.deepEqual((await flight), { completed: true });
-    poses.push(f.world().pose);
-    f.orbit.destroy();
-  }
-  close(poses[1]!.positionM, poses[0]!.positionM, 1e-9);
-  close(poses[1]!.orientationXyzw, poses[0]!.orientationXyzw, 1e-9);
-  const { positionM, orientationXyzw } = poses[0]!;
-  const length = (v: readonly number[]) => Math.hypot(...v);
-  // Between the Sun and the focus, at the arrival distance.
-  assert.ok(length(positionM) < length(focus.positionM));
-  const sight = focus.positionM.map(v => v / length(focus.positionM));
-  const offset = focus.positionM.map((v, axis) => v - positionM[axis]!);
-  // The ray through the principal point, offset beside the panel, is the sightline; the view axis leaves it by that angle.
-  const principal = Math.cos(Math.atan2(Math.hypot(...optics.principalOffsetPixels), optics.focalPixels));
-  assert.ok(Math.abs((offset.reduce((sum, v, axis) => sum + v * sight[axis]!, 0) / length(offset)) - (1)) < 10 ** -9 / 2, `${(offset.reduce((sum, v, axis) => sum + v * sight[axis]!, 0) / length(offset))} is not close to ${1}`);
-  const forward = [-worldRotationFromQuaternion(orientationXyzw)[2]!, -worldRotationFromQuaternion(orientationXyzw)[5]!, -worldRotationFromQuaternion(orientationXyzw)[8]!];
-  assert.ok(Math.abs(forward.reduce((sum, v, axis) => sum + v * sight[axis]!, 0) - (principal)) < 10 ** -9 / 2, `${forward.reduce((sum, v, axis) => sum + v * sight[axis]!, 0)} is not close to ${principal}`);
-  // Camera +y (up) leans toward celestial north.
-  const axes = worldRotationFromQuaternion(orientationXyzw);
-  assert.ok(axes[7] > 0);
-});
-
-it('holds its last frame while a flight passes through the body, and still refuses a camera placed inside it', async () => {
-  const f = fixture();
-  const before = f.orbit.captureWorldCamera(frame);
-  const inside = { ...before, pose: { ...before.pose, positionM: [frame.originM[0] + 50, frame.originM[1], frame.originM[2]] as const } };
-  await f.orbit.applyWorldCamera(inside, frame, new AbortController().signal);
-  assert.deepEqual(f.orbit.captureWorldCamera(frame).pose.positionM, before.pose.positionM, 'the flight step inside the body is not adopted');
-  assert.throws(() => f.orbit.applyWorldCamera(inside, frame), /inside the focused body/u);
-  f.orbit.destroy();
-});
diff --git a/packages/renderer/src/navigation/prepared-focus.ts b/packages/renderer/src/navigation/prepared-focus.ts
deleted file mode 100644
index b6c6869c7ff..00000000000
--- a/packages/renderer/src/navigation/prepared-focus.ts
+++ /dev/null
@@ -1,94 +0,0 @@
-import { cross3 as cross } from '@cssearth/core';
-import { createSelectionFlight, createSelectionFlightSample, sampleSelectionFlightInto } from '@cssearth/engine';
-import type { OrientationXyzw, PositionM } from '@cssearth/engine';
-import type { PreparedCamera } from './prepared-camera.js';
-import type { PreparedWorldCameraFrame, WorldCameraViewport } from './world-camera.js';
-import { scaleWorldPosition, validateWorldPosition, worldQuaternionFromRotation } from './world-camera-math.js';
-import { createWorldSelectionTarget } from './selection-target.js';
-
-/** A prepared navigation bound, independent of the mounted detail's physical radius. */
-export interface PreparedNavigationFocus {
-  readonly id: string;
-  readonly positionM: PositionM;
-  readonly framingRadiusM: number;
-  readonly limits: { readonly minimumDistanceM: number; readonly maximumDistanceM: number };
-  readonly upReference?: PositionM;
-  readonly arrivalDistanceM?: number;
-}
-export interface PreparedFocusFlightOptions {
-  readonly signal?: AbortSignal;
-  readonly reducedMotion?: boolean;
-  readonly durationMilliseconds?: number;
-}
-
-export function prepareFocusFlight(camera: PreparedCamera, focus: PreparedNavigationFocus, frame: PreparedWorldCameraFrame,
-  viewport: WorldCameraViewport & { framingRadiusPixels: number }, milliseconds?: number) {
-  const checked = validatePreparedNavigationFocus(focus);
-  if (milliseconds !== undefined && (!Number.isFinite(milliseconds) || milliseconds <= 0)) throw new TypeError('Focus flight duration must be positive.');
-  const from = camera.capture(frame);
-  // A prepared focus is a catalogue object every dataset shows as seen from here, so the flight arrives on that line of
-  // sight whatever the previous view faced. Keeping the previous direction could land behind it, looking back at the Sun.
-  if (frame.referenceFrame !== 'sun-icrf') throw new TypeError(`Prepared focus ${checked.id} needs a Sun-centred frame for its line of sight, not ${frame.referenceFrame}.`);
-  const sightline = { ...from, pose: { ...from.pose, orientationXyzw: sightlineOrientation(checked.positionM, checked.upReference, viewport) } };
-  // This temporary framing input describes only the destination; the detail always uses frame.
-  const target = createWorldSelectionTarget(sightline, { ...frame, originM: checked.positionM,
-    bodyRadiusM: checked.framingRadiusM, orbitUpReference: checked.upReference }, viewport);
-  const offset = subtract(target.pose.positionM, checked.positionM);
-  const distance = Math.hypot(...offset);
-  const arrival = Math.max(checked.limits.minimumDistanceM,
-    Math.min(checked.limits.maximumDistanceM, checked.arrivalDistanceM ?? distance));
-  const to = { ...target.pose, positionM: add(checked.positionM, scaleWorldPosition(offset, arrival / distance)) };
-  const flight = createSelectionFlight({ from: from.pose, to, focusPositionM: checked.positionM,
-    ...(milliseconds === undefined ? {} : { durationS: milliseconds / 1000 }) });
-  const value = createSelectionFlightSample();
-  const sample = (progress: number) => {
-    sampleSelectionFlightInto(flight, progress * flight.durationS, value);
-    camera.adopt({ ...from, pose: { positionM: value.positionM, orientationXyzw: value.orientationXyzw } }, frame);
-  };
-  return { focus: checked, sample, durationMilliseconds: flight.durationS * 1000 };
-}
-
-export function validatePreparedNavigationFocus(focus: PreparedNavigationFocus): PreparedNavigationFocus {
-  if (!focus || typeof focus.id !== 'string' || !/^[a-z0-9][a-z0-9:._+-]{0,127}$/iu.test(focus.id) ||
-    !Number.isFinite(focus.framingRadiusM) || focus.framingRadiusM <= 0 ||
-    !Number.isFinite(focus.limits?.minimumDistanceM) || focus.limits.minimumDistanceM <= 0 ||
-    !Number.isFinite(focus.limits?.maximumDistanceM) || focus.limits.maximumDistanceM <= focus.limits.minimumDistanceM ||
-    (focus.arrivalDistanceM !== undefined && (!Number.isFinite(focus.arrivalDistanceM) || focus.arrivalDistanceM <= 0))) {
-    throw new TypeError('Prepared navigation focus metadata is invalid.');
-  }
-  validateWorldPosition(focus.positionM);
-  if (focus.upReference !== undefined) {
-    validateWorldPosition(focus.upReference);
-    if (Math.abs(Math.hypot(...focus.upReference) - 1) > 1e-9) throw new TypeError('Prepared focus up must be a unit reference direction.');
-  }
-  return Object.freeze({ ...focus, positionM: Object.freeze([...focus.positionM]) as PositionM,
-    limits: Object.freeze({ ...focus.limits }),
-    ...(focus.upReference === undefined ? {} : { upReference: Object.freeze([...focus.upReference]) as PositionM }) });
-}
-/** A camera at the Sun's side looking at `positionM` (Sun-centred ICRF), with `up` (celestial north unless the focus states one)
- * up on screen: north up and east left, as a sky image shows it. Axes are +x right, +y up, +z toward the eye. */
-export function sightlineOrientation(positionM: PositionM, up: PositionM = [0, 0, 1],
-  viewport: Pick<WorldCameraViewport, 'principalOffsetPixels' | 'focalPixels'> = { principalOffsetPixels: [0, 0], focalPixels: 1 }): OrientationXyzw {
-  const length = Math.hypot(...positionM);
-  if (!(length > 0)) throw new RangeError('A focus at the Sun has no line of sight.');
-  const eye = scaleWorldPosition(positionM, -1 / length);
-  // A sightline along the pole has no north on screen; any perpendicular up keeps the pose defined.
-  const upward = Math.hypot(...cross(up, eye)) > 1e-9 ? up : [1, 0, 0] as PositionM;
-  const right = normalize(cross(upward, eye)), top = cross(eye, right);
-  const axes = [right[0], top[0], eye[0], right[1], top[1], eye[1], right[2], top[2], eye[2]];
-  // The focus is drawn at the principal point, beside the panel, not on the view axis. Turn the camera so the ray through
-  // that point, not the axis, lies on the sightline: the object is then seen exactly as from here.
-  const [x, y] = viewport.principalOffsetPixels;
-  const ray = normalize([x, -y, viewport.focalPixels]);
-  const axis = cross(ray, [0, 0, 1]), sine = Math.hypot(...axis), cosine = ray[2];
-  if (!(sine > 1e-12)) return worldQuaternionFromRotation(axes);
-  const [kx, ky, kz] = scaleWorldPosition(axis, 1 / sine), c = 1 - cosine;
-  const turn = [cosine + kx * kx * c, kx * ky * c - kz * sine, kx * kz * c + ky * sine,
-    ky * kx * c + kz * sine, cosine + ky * ky * c, ky * kz * c - kx * sine,
-    kz * kx * c - ky * sine, kz * ky * c + kx * sine, cosine + kz * kz * c];
-  return worldQuaternionFromRotation([0, 1, 2].flatMap(row => [0, 1, 2].map(column =>
-    axes[row * 3]! * turn[column]! + axes[row * 3 + 1]! * turn[3 + column]! + axes[row * 3 + 2]! * turn[6 + column]!)));
-}
-function normalize(a: PositionM): PositionM { return scaleWorldPosition(a, 1 / Math.hypot(...a)); }
-function add(a: PositionM, b: PositionM): PositionM { return [a[0] + b[0], a[1] + b[1], a[2] + b[2]]; }
-function subtract(a: PositionM, b: PositionM): PositionM { return [a[0] - b[0], a[1] - b[1], a[2] - b[2]]; }
diff --git a/packages/renderer/src/rendering/object-control-binding.ts b/packages/renderer/src/rendering/object-control-binding.ts
index b137e2b2185..f5743473ebc 100644
--- a/packages/renderer/src/rendering/object-control-binding.ts
+++ b/packages/renderer/src/rendering/object-control-binding.ts
@@ -104,7 +104,7 @@ export function createObjectControlBinding({ stage, controls, initialSelection,
   }
   const settingsInputs = [...(settingsRoot?.querySelectorAll<SettingInput>("input[name], button[name]") ?? [])]
     .filter(input => !SHELL_SETTING_NAMES.has(input.name));
-  const panels = new Map(sectionElements(document, '[data-dataset-details], [data-focus-dataset-details]').map(panel => [panel.id, panel]));
+  const panels = new Map(sectionElements(document, '[data-dataset-details], [data-page-dataset-details]').map(panel => [panel.id, panel]));
   const details = datasetInputs.map(input => {
     const id = input.getAttribute('aria-controls');
     const panel = id ? panels.get(id) ?? document.getElementById(id) : null;
diff --git a/packages/renderer/src/runtime/object-runtime.ts b/packages/renderer/src/runtime/object-runtime.ts
index ddc42e03c1f..16f922c7b61 100644
--- a/packages/renderer/src/runtime/object-runtime.ts
+++ b/packages/renderer/src/runtime/object-runtime.ts
@@ -179,18 +179,9 @@ export function createObjectRuntime(definition: ObjectRuntimeDefinition, service
         setAllowed(false);
         return getOrbit().applyWorldCamera(pose, worldFrame, options?.signal, options?.departing);
       },
-      preparedFocus() { return getOrbit().preparedFocus(); },
       // Every prepared group is connected and painted once: an arriving flight
       // may resume before the remaining readiness bookkeeping settles.
       detailActivated() { return phase !== 'mounting' && !lifetime.disposed; },
-      setPreparedFocus(focus: Parameters<ObjectWorldNavigation['setPreparedFocus']>[0]) {
-        if (!lifetime.disposed) getOrbit().setPreparedFocus(focus, worldFrame);
-      },
-      flyToPreparedFocus(focus: Parameters<ObjectWorldNavigation['flyToPreparedFocus']>[0], options?: Parameters<ObjectWorldNavigation['flyToPreparedFocus']>[1]) {
-        if (lifetime.disposed) return Promise.resolve({ completed: false });
-        setAllowed(false);
-        return getOrbit().flyToPreparedFocus(focus, worldFrame, this.optics(), options);
-      },
       optics() {
         const state = getOrbit().state();
         return { focalPixels: state.focal, projectionScale: state.projectionScale, principalOffsetPixels: [state.principalOffset[0], state.principalOffset[1]] as const,
diff --git a/packages/renderer/src/runtime/world-navigation-types.ts b/packages/renderer/src/runtime/world-navigation-types.ts
index 64376cd2ac2..55a0a801c48 100644
--- a/packages/renderer/src/runtime/world-navigation-types.ts
+++ b/packages/renderer/src/runtime/world-navigation-types.ts
@@ -1,5 +1,4 @@
 import type { PreparedWorldCameraFrame, WorldCameraPose, WorldCameraViewport } from '../navigation/world-camera.js';
-import type { PreparedNavigationFocus, PreparedFocusFlightOptions } from '../navigation/prepared-focus.js';
 
 export type ObjectWorldNavigationListener = (world: WorldCameraPose, viewport: WorldCameraViewport) => void;
 
@@ -15,9 +14,6 @@ export interface ObjectWorldNavigation {
   holdPresentation?(): () => void;
   capture(): WorldCameraPose;
   apply(pose: WorldCameraPose, options?: { signal: AbortSignal; departing?: boolean }): void | Promise<boolean>;
-  preparedFocus(): PreparedNavigationFocus | null;
-  setPreparedFocus(focus: PreparedNavigationFocus | null): void;
-  flyToPreparedFocus(focus: PreparedNavigationFocus, options?: PreparedFocusFlightOptions): Promise<{ completed: boolean }>;
   setZoomOutCentering?(enabled: boolean): void;
   /** True once every prepared detail group is connected and painted. */
   detailActivated?(): boolean;
diff --git a/packages/renderer/src/sky/prepared-sky-runtime.test.ts b/packages/renderer/src/sky/prepared-sky-runtime.test.ts
index 3419c06ca3c..bf58b57b27d 100644
--- a/packages/renderer/src/sky/prepared-sky-runtime.test.ts
+++ b/packages/renderer/src/sky/prepared-sky-runtime.test.ts
@@ -6,7 +6,6 @@ import type { PreparedCssSky } from './types.js';
 import type { PreparedCssVolume } from '../volume/types.js';
 import type { PreparedCssImageLayers } from '../image-layers/loader.js';
 import type { PreparedVolumeDatasets } from '../volume/prepared-volume-datasets.js';
-import type { PreparedNavigationFocus } from '../navigation/prepared-focus.js';
 import type { WorldCameraPose } from '../navigation/world-camera.js';
 import type { DensityVolumeFrame } from '@cssearth/objects';
 import { stubGlobal, unstubAllGlobals, waitFor } from '@cssearth/objects/node/contract';
@@ -135,7 +134,6 @@ test('the galaxy is its bulge slices at every overview scope, with no disc plane
       pose: { positionM: [volume.frame.originM[0], volume.frame.originM[1], volume.frame.originM[2] + 2.5 * radiusM], orientationXyzw: [0, 0, 0, 1] } };
     for (const scope of ['local-group', 'milky-way', 'system', 'milky-way', undefined]) {
       mounted.setOverview(scope !== undefined, scope);
-      mounted.selectGalaxy(null);
       mounted.publish(camera, viewport, spatialFrame);
       const nodes = descendants(image);
       assert.equal(nodes.filter(node => node.dataset.volumeImpostor !== undefined).length, 0);
@@ -611,6 +609,8 @@ test('authoritative detailed close-up gates background fetch, painting and publi
   const base = new URL('../../../../src/', import.meta.url), parsecM = 3.085677581491367e16;
   const context = JSON.parse(readFileSync(new URL('objects/sun/prepared/world-context.json', base), 'utf8'));
   context.volume.opacityProfile = { model: 'logarithmic-distance', fadeStartDistanceM: 1e19, fullDistanceM: 1e21, nearOpacity: 0, fullOpacity: 1 };
+  // The galaxy's volume is gated by the distance to the selected body, as for every body: the close-up is mid-fade.
+  context.volume.discHalfHeightM = .5 * parsecM;
   const volume = JSON.parse(readFileSync(new URL('objects/milky-way/prepared/volume.json', base), 'utf8')).data as PreparedCssVolume;
   const frame: PreparedCssVolume['frame'] = { referenceFrame: volume.frame.referenceFrame, epochJdTt: volume.frame.epochJdTt,
     originM: [context.focus.positionM[0], context.focus.positionM[1], context.focus.positionM[2] + 450 * parsecM],
@@ -626,30 +626,44 @@ test('authoritative detailed close-up gates background fetch, painting and publi
       description: 'Prepared fixture', sourceUrl: 'https://example.org/nebula', volume: { ...small, id },
       brightness: { overall: 1, x: 1, y: 1, z: 1 }, stars: { frame, points: [] } }] });
   const banks = ['focus-bank', 'warm-bank', 'cold-bank'].map(bank);
-  const image: PreparedCssImageLayers = { ...small, id: 'image-bank', bankViews: small.stacks.map(stack => ({ axis: stack.axis,
+  // Each package the host draws is a body of the world context; one of them has no bank of its own.
+  const nebula = context.bodies.find((body: { id: string }) => body.id === 'm1');
+  // The galaxy stands apart from the nebulae: a body inside a galaxy's framing sphere draws that galaxy's dots.
+  const imageFrame = { ...frame, originM: [frame.originM[0] + 100 * frame.metersPerUnit, frame.originM[1], frame.originM[2]] as [number, number, number] };
+  for (const id of ['focus-bank', 'image-bank', 'no-bank']) context.bodies.push({ ...nebula, id, name: id,
+    positionM: id === 'image-bank' ? imageFrame.originM : frame.originM, radiusM: frame.metersPerUnit });
+  const image: PreparedCssImageLayers = { ...small, frame: imageFrame, id: 'image-bank', bankViews: small.stacks.map(stack => ({ axis: stack.axis,
     normalUnits: stack.axis === 'x' ? [1, 0, 0] : stack.axis === 'y' ? [0, 1, 0] : [0, 0, 1], samplingStepUnits: 1 })) };
   const loadVolumeDataset = mock.fn(async (id: string) => ({ payload: banks.find(bank => bank.id === id)!, resolveResource: (path: string) => `/bank/${id}/${path}` }));
   const loadImageLayer = mock.fn(async () => ({ payload: image, resolveResource: (path: string) => `/image/${path}` }));
-  catalogMount.mock.mockImplementation(() => ({ destroy() {}, select() {}, highlight() {}, resolve: (id: string) => ({ id, detailedObjectId: id === 'catalogue-only' ? undefined : id.replace('catalogue:', '') }), publish() {}, inspect() {} }));
+  catalogMount.mock.mockImplementation(() => ({ destroy() {}, select() {}, highlight() {}, resolve: (id: string) => ({ id, detailedObjectId: id === 'no-bank' ? undefined : id.replace('catalogue:', '') }), publish() {}, inspect() {} }));
   const document = new FakeDocument(), stage = document.createElement();
   const fetchResource = mock.fn<typeof fetch>(async () => new Response(new Uint8Array([1])));
   Object.assign(document.defaultView, { fetch: fetchResource });
   const mounted = createPreparedUniverse({ context, volume, pointAppearance: readCanonicalPointField(), sprites: {},
     resolveResource: path => `/volume/${path}`, resolvePointResource: path => `/stars/${path}`,
     ...datasetBanks(banks.map(bank => ({ id: bank.id, frame, contextVisibility: bank.contextVisibility, attachedTo: bank.attachedTo }))), loadVolumeDataset,
-    imageLayerBanks: [{ id: image.id, frame }], loadImageLayer, catalog: { payload: {}, fadeStartDistanceM: 10, fullDistanceM: 20 },
+    imageLayerBanks: [{ id: image.id, frame: imageFrame }], loadImageLayer, catalog: { payload: {}, fadeStartDistanceM: 10, fullDistanceM: 20 },
   }).mount(stage as unknown as HTMLElement);
   const root = mounted.root as unknown as FakeElement;
   const findBank = (id: string) => root.children.find(node => node.dataset.volumeDatasetObject === id)!;
   const mw = root.children.find(node => node.className === 'prepared-volume-context')!;
   const sky = root.children.find(node => node.className === 'prepared-celestial-sky')!;
-  const focus = (id = 'catalogue:focus-bank'): PreparedNavigationFocus => ({ id, positionM: frame.originM, framingRadiusM: frame.metersPerUnit,
-    limits: { minimumDistanceM: .01 * frame.metersPerUnit, maximumDistanceM: 1e25 } });
+  // A bank package is a body of the world; its scene's dataset shows the bank as its companion.
+  let shown: string | null = null;
+  const select = (id: string) => {
+    if (shown) mounted.setVolumeDatasetEnabled(shown, false);
+    shown = mounted.focusBank(id) ? id : null;
+    const body = [context.focus, ...context.bodies].find((candidate: { id: string }) => candidate.id === id) as { positionM: [number, number, number]; radiusM: number };
+    mounted.selectObject(id, { referenceFrame: frame.referenceFrame, epochJdTt: frame.epochJdTt, originM: body.positionM,
+      presentationToReference: [0, 1, 0, 1, 0, 0, 0, 0, 1], metersPerUnit: body.radiusM, bodyRadiusM: body.radiusM });
+    if (shown) mounted.setVolumeDatasetEnabled(shown, true);
+  };
   const camera = (radii: number): WorldCameraPose => ({ referenceFrame: frame.referenceFrame, epochJdTt: frame.epochJdTt,
     pose: { positionM: [frame.originM[0], frame.originM[1], frame.originM[2] + radii * frame.metersPerUnit], orientationXyzw: [0, 0, 0, 1] } });
   try {
     await mounted.focusBank('focus-bank')!.load(); await mounted.focusBank('warm-bank')!.load();
-    mounted.selectGalaxy('catalogue:focus-bank', focus());
+    select('focus-bank');
     const near = camera(6.1), savedPose = structuredClone(near);
     mounted.publish(near, viewport, spatialFrame);
     assert.deepEqual(loadVolumeDataset.mock.calls.map(({ arguments: [id] }) => id), ['focus-bank', 'warm-bank']);
@@ -667,7 +681,7 @@ test('authoritative detailed close-up gates background fetch, painting and publi
       mounted.publish(camera(radii), viewport, spatialFrame);
       if (radii > 8) { await mounted.focusBank('cold-bank')!.load(); await mounted.focusBank(image.id)!.load(); mounted.publish(camera(radii), viewport, spatialFrame); }
       const originalOpacity = Number(mw.dataset.volumeOpacity), alpha = Number(mw.style.opacity);
-      assert.ok(originalOpacity > 0); assert.ok(originalOpacity < 1);
+      assert.ok(originalOpacity > 0); assert.ok(radii > 8 ? originalOpacity === 1 : originalOpacity < 1);
       const completedContribution = originalOpacity;
       assert.ok(Math.abs(alpha - (completedContribution * multiplier)) < 10 ** -12 / 2, `${alpha} is not close to ${completedContribution * multiplier}`);
       assert.ok(Math.abs(((1 - alpha) * Number(sky.style.opacity)) - (1 - completedContribution)) < 10 ** -12 / 2, `${((1 - alpha) * Number(sky.style.opacity))} is not close to ${1 - completedContribution}`);
@@ -686,16 +700,16 @@ test('authoritative detailed close-up gates background fetch, painting and publi
     const before = all(findBank('warm-bank')).map(node => ({ ...node.style }));
     mounted.publish({ ...near, pose: { ...near.pose, orientationXyzw: [0, Math.SQRT1_2, 0, Math.SQRT1_2] } }, viewport, spatialFrame);
     assert.deepEqual(all(findBank('warm-bank')).map(node => ({ ...node.style })), before);
-    mounted.selectGalaxy('catalogue:image-bank', focus('catalogue:image-bank')); mounted.publish(near, viewport, spatialFrame);
+    select('image-bank');
+    mounted.publish({ ...near, pose: { ...near.pose, positionM: [imageFrame.originM[0], near.pose.positionM[1], near.pose.positionM[2]] } }, viewport, spatialFrame);
     assert.equal(imageRoot.style.display, ''); assert.equal(findBank('focus-bank').style.display, 'none');
-    mounted.selectGalaxy(null); mounted.publish(near, viewport, spatialFrame);
+    select(context.focus.id); mounted.publish(near, viewport, spatialFrame);
     assert.equal(mw.style.display, '');
     await waitFor(() => {
       mounted.publish(near, viewport, spatialFrame);
       assert.equal(findBank('focus-bank').style.display, 'block');
     });
-    mounted.selectGalaxy('catalogue-only', focus('catalogue-only')); mounted.publish(near, viewport, spatialFrame);
+    select('no-bank'); mounted.publish(near, viewport, spatialFrame);
     assert.equal(mw.style.display, '');
-    assert.throws(() => mounted.selectGalaxy('catalogue:focus-bank', focus('mismatch')), /focus/);
   } finally { mounted.destroy(); }
 });
diff --git a/packages/renderer/src/styles/world-context.css b/packages/renderer/src/styles/world-context.css
index 12ac09f61e6..b2a189bb681 100644
--- a/packages/renderer/src/styles/world-context.css
+++ b/packages/renderer/src/styles/world-context.css
@@ -185,9 +185,8 @@
 .prepared-world-context [data-context-indicator-hovered="true"][data-context-label-visible="true"] > .context-caption::after {
   opacity: 1;
 }
-/* The galaxy catalogue (prepared-galaxy-catalog.ts): a zero-size root at the stage centre whose dots, R500 apertures,
-   kind markers and labels are placed from it. Their fades own opacity and visibility, the camera their transforms, an
-   aperture's ellipse its size, and a label's pick state its pointer events; the rest is fixed here. */
+/* The galaxy catalogue (prepared-galaxy-catalog.ts): a zero-size root at the stage centre whose dots are placed from it.
+   Their fade owns opacity and visibility and the camera their transforms; the rest is fixed here. */
 .prepared-galaxy-catalog {
   position: absolute;
   left: 50%;
@@ -196,25 +195,16 @@
   height: 0;
   pointer-events: none;
 }
-.prepared-galaxy-catalog [data-galaxy-dot],
-.prepared-galaxy-catalog [data-galaxy-label] {
+.prepared-galaxy-catalog [data-galaxy-dot] {
   position: absolute;
   left: 0;
   top: 0;
   pointer-events: none;
-}
-.prepared-galaxy-catalog [data-galaxy-dot] {
   width: 2px;
   height: 2px;
   border-radius: 50%;
   background: #c2ccd8;
 }
-.prepared-galaxy-catalog [data-galaxy-label] {
-  cursor: default;
-}
-.prepared-galaxy-catalog [data-galaxy-label][data-object-navigate] {
-  cursor: pointer;
-}
 /* Environment captions (environment-labels.ts): a zero-size root at the stage centre whose captions are placed from it.
    A caption's fade owns its visibility and opacity, and a link's fade its pointer events. */
 .prepared-environment-labels {
diff --git a/packages/renderer/src/universe/catalog-marker.test.ts b/packages/renderer/src/universe/catalog-marker.test.ts
deleted file mode 100644
index 6b5216f6318..00000000000
--- a/packages/renderer/src/universe/catalog-marker.test.ts
+++ /dev/null
@@ -1,40 +0,0 @@
-import { readFileSync } from 'node:fs';
-import { test } from 'node:test';
-import assert from 'node:assert/strict';
-import { isDeepStrictEqual } from 'node:util';
-import { parsePreparedNebulaCatalog, parsePreparedGalaxyCatalog, parsePreparedClusterCatalog } from '@cssearth/catalog';
-import { catalogMarkerKind, catalogMarkerSvg, mountCatalogMarkerKind } from './catalog-marker.js';
-
-test('shipped classifications select the correct marker without object ID exceptions', () => {
-  for (const [id, expected] of [['m45', 'open-cluster'], ['helix', 'planetary-nebula'],
-    ['m42', 'nebula'], ['m8', 'nebula'], ['m1', 'nebula'], ['m2-9', 'nebula']]) {
-    const catalog = parsePreparedNebulaCatalog(JSON.parse(readFileSync(
-      new URL('../../../../src/objects/' + id + '/source/nebula.json', import.meta.url), 'utf8')));
-    assert.equal(catalogMarkerKind(catalog.objects[0]!), expected);
-  }
-  const galaxies = parsePreparedGalaxyCatalog(JSON.parse(readFileSync(
-    new URL('../../../../src/objects/local-group/prepared/catalogue.json', import.meta.url), 'utf8')));
-  assert.equal(catalogMarkerKind(galaxies.objects[0]!), 'galaxy');
-});
-
-test('outer scene markers share the ordinary circle while retaining classification metadata', () => {
-  const clusters = parsePreparedClusterCatalog(JSON.parse(readFileSync(
-    new URL('../../../../src/objects/galaxy-clusters/prepared/catalogue.json', import.meta.url), 'utf8')));
-  assert.equal(clusters.objects.every(object => catalogMarkerKind(object) === 'galaxy-cluster'), true);
-  for (const kind of ['galaxy', 'nebula', 'planetary-nebula', 'open-cluster', 'globular-cluster', 'galaxy-group', 'galaxy-cluster'] as const) {
-    const marker = { className: '', dataset: { catalogMarkerKind: '' }, style: {}, innerHTML: '<svg></svg>', setAttribute() {} };
-    mountCatalogMarkerKind(marker as unknown as HTMLElement, kind);
-    assert.equal(marker.dataset.catalogMarkerKind, kind);
-    assert.equal(marker.className, 'prepared-context-marker');
-    assert.equal(marker.innerHTML, '');
-  }
-});
-
-test('globular-cluster kind selects a stellar-cluster marker independently of its display name', () => {
-  const catalog = parsePreparedNebulaCatalog(JSON.parse(readFileSync(
-    new URL('../../../../src/objects/m45/source/nebula.json', import.meta.url), 'utf8')));
-  const cluster = { ...catalog.objects[0]!, kind: 'globular-cluster' as const };
-  assert.equal(catalogMarkerKind(cluster), 'globular-cluster');
-  assert.ok(catalogMarkerSvg('globular-cluster').includes('<circle'));
-  assert.notEqual(catalogMarkerSvg('globular-cluster'), catalogMarkerSvg('nebula'));
-});
diff --git a/packages/renderer/src/universe/catalog-marker.ts b/packages/renderer/src/universe/catalog-marker.ts
deleted file mode 100644
index 16f43c25f04..00000000000
--- a/packages/renderer/src/universe/catalog-marker.ts
+++ /dev/null
@@ -1,44 +0,0 @@
-import { isPreparedCluster, isPreparedNebula } from '@cssearth/catalog';
-import type { PreparedCatalogObject } from '@cssearth/catalog';
-
-export type CatalogMarkerKind = 'galaxy' | 'nebula' | 'planetary-nebula' | 'open-cluster' | 'globular-cluster' | 'galaxy-group' | 'galaxy-cluster';
-
-/** Presentation follows the catalogue classification, never a list of object IDs. */
-export function catalogMarkerKind(object: PreparedCatalogObject): CatalogMarkerKind {
-  if (isPreparedCluster(object)) return 'galaxy-cluster';
-  if (!isPreparedNebula(object)) return 'galaxy';
-  if (object.kind === 'globular-cluster') return 'globular-cluster';
-  if (/open cluster/iu.test(object.classification.name)) return 'open-cluster';
-  if (/planetary nebula/iu.test(object.classification.name)) return 'planetary-nebula';
-  return 'nebula';
-}
-
-const cloud = '<path d="M5 17a4 4 0 0 1-1-7.87A5.5 5.5 0 0 1 14.5 7a4 4 0 0 1 4.9 4.1A3 3 0 0 1 19 17Z"/>';
-const shapes: Record<CatalogMarkerKind, string> = {
-  galaxy: '<ellipse cx="12" cy="12" rx="9" ry="4.5"/>',
-  nebula: cloud,
-  'planetary-nebula': cloud + '<circle cx="11" cy="12" r="1.3" fill="currentColor" stroke="none"/>',
-  'open-cluster': '<circle cx="12" cy="12" r="8" stroke-dasharray="0.1 4.09" stroke-linecap="round"/>',
-  'globular-cluster': '<circle cx="12" cy="12" r="8"/><path d="M4 12h16M12 4v16"/>',
-  'galaxy-group': '<path d="M12 3 20 7.5v9L12 21l-8-4.5v-9Z"/>',
-  'galaxy-cluster': '<path d="M12 3 20 7.5v9L12 21l-8-4.5v-9Z" fill="currentColor"/>',
-};
-
-/** Fixed decorative vector icons, not generated scene imagery. */
-export function mountCatalogMarker(marker: HTMLElement, object: PreparedCatalogObject): void {
-  const kind = catalogMarkerKind(object);
-  mountCatalogMarkerKind(marker, kind);
-}
-
-export function mountCatalogMarkerKind(marker: HTMLElement, kind: CatalogMarkerKind): void {
-  marker.dataset.catalogMarkerKind = kind;
-  marker.className = 'prepared-context-marker';
-  // Its box is a world-context.css rule; the fade owns opacity and visibility.
-  marker.style.cssText = 'opacity:0;visibility:hidden';
-  marker.setAttribute('aria-hidden', 'true');
-  marker.innerHTML = '';
-}
-
-export function catalogMarkerSvg(kind: CatalogMarkerKind): string {
-  return '<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" aria-hidden="true">' + shapes[kind] + '</svg>';
-}
diff --git a/packages/renderer/src/universe/catalogue-points.test.ts b/packages/renderer/src/universe/catalogue-points.test.ts
index 3cca6afa758..49cf8b29e70 100644
--- a/packages/renderer/src/universe/catalogue-points.test.ts
+++ b/packages/renderer/src/universe/catalogue-points.test.ts
@@ -22,7 +22,7 @@ test('the prepared catalogues the app draws are valid banks of every selected ro
   // The published banks: what each recipe marks `published: true` and the app fetches. Their inputs (a survey's stars,
   // one catalogue's masers) are bake inputs in output/catalogue-points/, so they are not read here.
   for (const [object, id] of [['milky-way', 'globular-clusters'], ['milky-way', 'dots'], ['milky-way', 'old-star-dots'], ['nearby-universe', 'dots'], ['nearby-universe', 'bright-galaxy-dots'],
-    ['nearby-universe', 'quasar-dots'], ['m31', 'stars'], ['m31', 'dots'], ['m33', 'stars'], ['m33', 'dots'], ['m81', 'dots'], ['ngc-253', 'dots']]) {
+    ['nearby-universe', 'quasar-dots'], ['m31-layers', 'stars'], ['m31-layers', 'dots'], ['m33-layers', 'stars'], ['m33-layers', 'dots'], ['m81-layers', 'dots'], ['ngc-253-layers', 'dots']]) {
     const path = new URL(`../../../../src/objects/${object}/prepared/${id}.bin`, import.meta.url);
     const prepared = decodeCatalogueBankBinary(unpackPreparedBinary(readFileSync(path), path.pathname), path.pathname) as {
       points: number[][]; counts: { points: number; missingDistance?: number; selected?: number }; source?: string; appearance: { levels?: { points: number }[] } };
diff --git a/packages/renderer/src/universe/detailed-focus-context.ts b/packages/renderer/src/universe/detailed-focus-context.ts
index b0b57bf0df1..9558e135116 100644
--- a/packages/renderer/src/universe/detailed-focus-context.ts
+++ b/packages/renderer/src/universe/detailed-focus-context.ts
@@ -1,14 +1,15 @@
-import type { PreparedNavigationFocus } from '../navigation/prepared-focus.js';
 import { worldCameraViewport, type WorldCameraViewport } from '../navigation/world-camera.js';
 import type { WorldCameraPose } from '../navigation/world-camera.js';
 
+/** The selected bank package: where it is and the radius its page frames. */
+export interface SelectedBank { readonly positionM: readonly [number, number, number]; readonly framingRadiusM: number; }
 /** Presentation only: normal focus arrival is about 6.1 authored radii. */
 const HIDDEN_WITHIN_RADII = 8;
 const RESTORED_BY_RADII = 32;
 
 /** Fade surrounding detailed banks, without changing the observer or the Sun-distance sky policy. */
 export function detailedFocusContextOpacity(world: WorldCameraPose,
-  focus: Pick<PreparedNavigationFocus, 'positionM' | 'framingRadiusM'> | null): number {
+  focus: SelectedBank | null): number {
   if (!focus) return 1;
   const radii = Math.hypot(...world.pose.positionM.map((value, axis) => value - focus.positionM[axis])) / focus.framingRadiusM;
   const progress = Math.max(0, Math.min(1, (radii - HIDDEN_WITHIN_RADII) / (RESTORED_BY_RADII - HIDDEN_WITHIN_RADII)));
diff --git a/packages/renderer/src/universe/galaxy-catalog-layout.test.ts b/packages/renderer/src/universe/galaxy-catalog-layout.test.ts
index 0be62b7977a..932c7db2057 100644
--- a/packages/renderer/src/universe/galaxy-catalog-layout.test.ts
+++ b/packages/renderer/src/universe/galaxy-catalog-layout.test.ts
@@ -1,17 +1,10 @@
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
-import { isDeepStrictEqual } from 'node:util';
-import type { PreparedGalaxyRecord } from '@cssearth/catalog';
-import { admitGalaxyLabels, catalogVolumeCorners, projectCatalogBounds, projectCatalogPosition } from './galaxy-catalog-layout.js';
+import { projectCatalogPosition } from './galaxy-catalog-layout.js';
 
 const world = { referenceFrame: 'test', epochJdTt: 1,
   pose: { positionM: [0, 0, 0] as const, orientationXyzw: [0, 0, 0, 1] as const } };
 const viewport = { focalPixels: 100, principalOffsetPixels: [2, -3] as const };
-const rect = { left: 0, right: 30, top: 0, bottom: 12 };
-function candidate(id: string, distanceM: number, detailed = false) {
-  return { object: { id, ...(detailed ? { detailedObjectId: id } : {}) } as PreparedGalaxyRecord,
-    x: 0, y: 0, distanceM, labelRect: rect };
-}
 test('projects prepared metre coordinates in the shared observer including translation and the principal point', () => {
   // The identity pose looks down -z with +y up; a point above the axis lands above the principal point on a y-down screen.
   assert.partialDeepStrictEqual(projectCatalogPosition([10, 20, -100], world, viewport), { x: 12, y: -23 });
@@ -19,43 +12,3 @@ test('projects prepared metre coordinates in the shared observer including trans
   assert.partialDeepStrictEqual(projectCatalogPosition([10, 20, -100], moved, viewport), { x: 2, y: -23 });
   assert.equal(projectCatalogPosition([0, 0, 100], world, viewport), null);
 });
-test('foreground exclusions beat all catalogue labels; major objects beat minor neighbours and selection wins', () => {
-  const near = candidate('near', 100), far = candidate('far', 200, true);
-  assert.deepEqual(admitGalaxyLabels([far, near], [], null), [{ ...far, placement: 0 }]);
-  assert.deepEqual(admitGalaxyLabels([far, near], [rect], null), []);
-  assert.deepEqual(admitGalaxyLabels([far, near], [], 'near'), [{ ...near, placement: 0 }]);
-  assert.deepEqual(admitGalaxyLabels([candidate('far', 200), near], [], null), [{ ...near, placement: 0 }]);
-});
-
-test('a clickable target beats a nearer disabled label even when its prepared class has lower priority', () => {
-  const disabled = { ...candidate('disabled', 1, true), navigable: false };
-  const clickable = { ...candidate('clickable', 100), navigable: true };
-  assert.deepEqual(admitGalaxyLabels([disabled, clickable], [], null), [{ ...clickable, placement: 0 }]);
-});
-
-test('a clickable label tries another side before yielding its space to disabled names', () => {
-  const alternate = { left: -50, right: -20, top: 0, bottom: 12 };
-  const target = { ...candidate('target', 100), navigable: true, alternateLabelRects: [alternate] };
-  const disabled = { ...candidate('disabled', 1), navigable: false, labelRect: alternate };
-  assert.deepEqual(admitGalaxyLabels([disabled, target], [rect], null), [{ ...target, labelRect: alternate, placement: 1 }]);
-});
-test('catalogues use the shared desktop budget, including a distant selected label, with stable ties', () => {
-  const rows = Array.from({ length: 40 }, (_, i) => ({ ...candidate(String(i).padStart(2, '0'), 100 + i),
-    labelRect: { left: i * 40, right: i * 40 + 30, top: 0, bottom: 12 } }));
-  const accepted = admitGalaxyLabels(rows, [], '39');
-  assert.equal(accepted.length, 24); assert.equal(accepted[0]!.object.id, '39');
-  assert.deepEqual(admitGalaxyLabels([...rows].reverse(), [], '39'), accepted);
-});
-test('cloud bounds follow physical scale and orientation instead of its central catalogue marker', () => {
-  const corners = catalogVolumeCorners({ referenceFrame: 'test', epochJdTt: 1,
-    originM: [0, 0, -100], metersPerUnit: 2, localToReferenceXyzw: [0, 0, Math.SQRT1_2, Math.SQRT1_2],
-    boundsUnits: { min: [-10, -2, -3], max: [10, 2, 3] } });
-  const bounds = projectCatalogBounds(corners, world, viewport)!;
-  assert.ok(Math.abs(bounds.top - (-3 - 2000 / 94)) < 10 ** -2 / 2, `${bounds.top} is not close to ${-3 - 2000 / 94}`);
-  assert.ok(Math.abs(bounds.right - (2 + 400 / 94)) < 10 ** -2 / 2, `${bounds.right} is not close to ${2 + 400 / 94}`);
-  const rolled = { ...world, pose: { ...world.pose, orientationXyzw: [0, 0, Math.SQRT1_2, Math.SQRT1_2] as const } };
-  const orbitBounds = projectCatalogBounds(corners, rolled, viewport)!;
-  assert.ok(Math.abs(orbitBounds.top - (-3 - 400 / 94)) < 10 ** -2 / 2, `${orbitBounds.top} is not close to ${-3 - 400 / 94}`);
-  assert.ok(Math.abs(orbitBounds.right - (2 + 2000 / 94)) < 10 ** -2 / 2, `${orbitBounds.right} is not close to ${2 + 2000 / 94}`);
-  assert.equal(projectCatalogBounds(corners, { ...world, pose: { ...world.pose, positionM: [0, 0, -100] } }, viewport), null);
-});
diff --git a/packages/renderer/src/universe/galaxy-catalog-layout.ts b/packages/renderer/src/universe/galaxy-catalog-layout.ts
index e34b1b066ad..1a4198d7339 100644
--- a/packages/renderer/src/universe/galaxy-catalog-layout.ts
+++ b/packages/renderer/src/universe/galaxy-catalog-layout.ts
@@ -1,24 +1,5 @@
-import { isNavigableCatalogObject, isPreparedCluster, isPreparedNebula } from '@cssearth/catalog';
-import type { PreparedCatalogObject } from '@cssearth/catalog';
-import type { DensityVolumeFrame } from '@cssearth/objects';
 import type { WorldCameraPose, WorldCameraViewport } from '../navigation/world-camera.js';
-import { cssCameraAxesFromOrientation, worldRotationFromQuaternion } from '../navigation/world-camera-math.js';
-import { labelRectsOverlap } from '../labels/screen-label-layout.js';
-import type { LabelScreenRect } from '../labels/screen-label-layout.js';
-import { admitStableLabels } from '../labels/stable-label-layout.js';
-import { createLabelBudget, labelImportance, type LabelBudget } from '../labels/universe-label-policy.js';
-
-export interface ProjectedGalaxy {
-  readonly navigable?: boolean;
-  readonly shown?: boolean;
-  readonly placement?: number;
-  readonly object: PreparedCatalogObject;
-  readonly x: number;
-  readonly y: number;
-  readonly distanceM: number;
-  readonly labelRect: LabelScreenRect;
-  readonly alternateLabelRects?: readonly LabelScreenRect[];
-}
+import { cssCameraAxesFromOrientation } from '../navigation/world-camera-math.js';
 
 /** Only the observer projection is runtime work; every astronomical position is prepared. */
 export function projectCatalogPosition(positionM: readonly number[], world: WorldCameraPose, viewport: WorldCameraViewport) {
@@ -34,57 +15,3 @@ export function projectCatalogPosition(positionM: readonly number[], world: Worl
     y: viewport.principalOffsetPixels[1] + viewport.focalPixels * y / depth,
     distanceM: Math.hypot(dx, dy, dz), depthM: depth };
 }
-
-/** Resolve the prepared cloud bounds once; catalogue stars do not enlarge this box. */
-export function catalogVolumeCorners(frame: DensityVolumeFrame): readonly (readonly number[])[] {
-  const r = worldRotationFromQuaternion(frame.localToReferenceXyzw);
-  return [0, 1, 2, 3, 4, 5, 6, 7].map(index => {
-    const [x, y, z] = [0, 1, 2].map(axis =>
-      (index & (1 << axis) ? frame.boundsUnits.max[axis]! : frame.boundsUnits.min[axis]!) * frame.metersPerUnit);
-    return [frame.originM[0] + r[0] * x! + r[1] * y! + r[2] * z!,
-      frame.originM[1] + r[3] * x! + r[4] * y! + r[5] * z!,
-      frame.originM[2] + r[6] * x! + r[7] * y! + r[8] * z!];
-  });
-}
-
-/** Keep the label above the whole projected cloud, including during an orbit. */
-export function projectCatalogBounds(cornersM: readonly (readonly number[])[], world: WorldCameraPose, viewport: WorldCameraViewport) {
-  const points = cornersM.map(corner => projectCatalogPosition(corner, world, viewport));
-  // A cloud crossing the observer plane has no finite screen bounds.
-  if (!points.length || points.some(point => point === null)) return null;
-  return { left: Math.min(...points.map(point => point!.x)), right: Math.max(...points.map(point => point!.x)),
-    top: Math.min(...points.map(point => point!.y)), bottom: Math.max(...points.map(point => point!.y)) };
-}
-
-/** A prepared object's label priority is fixed by its record: each one is computed once and kept with it, never
- * inside the per-frame sort. */
-const priorities = new WeakMap<PreparedCatalogObject, number>();
-/** Above every catalogue tier (labelImportance tops out at the orientation references, single digits). */
-const HIGHLIGHT_PRIORITY = 1000;
-function priority(object: PreparedCatalogObject): number {
-  let value = priorities.get(object);
-  if (value === undefined) {
-    value = object.status === 'candidate' ? 0
-      : labelImportance(isPreparedCluster(object) ? 'galaxy-cluster' : isPreparedNebula(object) ? 'nebula' : 'galaxy', !isPreparedCluster(object) && Boolean(object.detailedObjectId));
-    priorities.set(object, value);
-  }
-  return value;
-}
-
-/** Foreground exclusions win; selection, major objects, then stable distance/id ties. */
-export function admitGalaxyLabels(candidates: readonly ProjectedGalaxy[], blockers: readonly LabelScreenRect[], selectedId: string | null,
-  budget: LabelBudget = createLabelBudget(Infinity, Infinity, [], blockers), highlighted: ReadonlySet<string> = new Set()) {
-  // One priority read per candidate; the comparator reads numbers. The id comparison runs only on an exact distance tie.
-  // A highlighted category (its header pill) ranks ahead of every other label.
-  const ranked = candidates.map(candidate => ({ candidate, priority: priority(candidate.object) + (highlighted.has(candidate.object.id) ? HIGHLIGHT_PRIORITY : 0) }))
-    .sort((a, b) => b.priority - a.priority || a.candidate.distanceM - b.candidate.distanceM || a.candidate.object.id.localeCompare(b.candidate.object.id))
-    .map(({ candidate }) => candidate);
-  const stable = ranked.map((candidate, index) => ({
-    id: candidate.object.id, candidate, navigable: candidate.navigable ?? isNavigableCatalogObject(candidate.object),
-    pinned: Number(candidate.object.id === selectedId), priority: ranked.length - index,
-    shown: candidate.shown ?? false, previousPlacement: candidate.placement ?? 0,
-    placements: [candidate.labelRect, ...candidate.alternateLabelRects ?? []].map((rect, slot) => ({ slot, rect })),
-  }));
-  return admitStableLabels(stable, budget, (_, rect) => !blockers.some(blocker => labelRectsOverlap(blocker, rect)))
-    .map(({ candidate: { candidate }, placement, rect }) => ({ ...candidate, placement, labelRect: rect }));
-}
diff --git a/packages/renderer/src/universe/image-mesh.ts b/packages/renderer/src/universe/image-mesh.ts
index 50c7f39fbc3..4ceda8feaaf 100644
--- a/packages/renderer/src/universe/image-mesh.ts
+++ b/packages/renderer/src/universe/image-mesh.ts
@@ -144,7 +144,7 @@ export function mountImageMesh({ host, before, interiorBefore = before, labelHos
       if (next !== limbTransform) { limbTransform = next; if (next) limb.style.transform = next; limb.style.display = next ? '' : 'none'; }
     }
     const placement = captioned && shape && labelSize && placeSelectedBodyLabel(publication.world, publication.viewport, { positionM: centreM, radiusM },
-      { overview: false, focused: false, preview: undefined, edge: () => silhouetteBottom(shape) }, labelSize[0], labelSize[1]);
+      { overview: false, preview: undefined, edge: () => silhouetteBottom(shape) }, labelSize[0], labelSize[1]);
     const nextLabel = placement ? `translate(${format(placement.left)}px,${format(placement.top)}px) translate(-50%,0)` : labelTransform;
     if (nextLabel !== labelTransform) label.style.transform = labelTransform = nextLabel;
     const nextOpacity = String(placement ? Number((alpha * DEFAULT_CONTEXT_LABEL_OPACITY).toFixed(3)) : 0);
@@ -153,7 +153,7 @@ export function mountImageMesh({ host, before, interiorBefore = before, labelHos
   return Object.freeze({ root,
     /** Publishes the camera and returns how much the mesh covers what lies inside it, so that can give way as it closes over:
      * its opacity, or nothing while it is cut open. `captioned` is false while another subject owns the view's caption (a
-     * catalogue focus): the mesh then names nothing. */
+     * selection preview, a galaxy shown as its scene's subject): the mesh then names nothing. */
     publish(publication: VolumeCameraPublication, shown = 1, captioned = true): number {
       if (destroyed) return 0;
       lastShown = shown; lastCaptioned = captioned; latest = publication;
diff --git a/packages/renderer/src/universe/prepared-focus-bank.ts b/packages/renderer/src/universe/prepared-focus-bank.ts
index 301005bec99..102bb79b65c 100644
--- a/packages/renderer/src/universe/prepared-focus-bank.ts
+++ b/packages/renderer/src/universe/prepared-focus-bank.ts
@@ -29,3 +29,14 @@ export function createImageFocusBank(objectId: string, frame: DensityVolumeFrame
     subscribe: () => () => {},
   };
 }
+
+/** A bank of catalogue dots: one dataset, its members, with nothing to decode before it shows. */
+export function createPointFocusBank(objectId: string): PreparedFocusBank {
+  const state: PreparedFocusDatasets = { objectId, id: 'members', defaultDataset: 'members', selectedDataset: 'members', starsVisible: false,
+    datasets: [{ id: 'members', label: 'Members', title: 'Catalogue members', description: 'Prepared catalogue dots', sourceUrl: '' }] };
+  return {
+    objectId, framingRadiusM: () => { throw new TypeError('A bank of dots is framed by its scene.'); }, state: () => state, load: () => Promise.resolve(),
+    selectDataset(id) { if (id !== 'members') throw new TypeError('Unknown catalogue-point dataset.'); },
+    subscribe: () => () => {},
+  };
+}
diff --git a/packages/renderer/src/universe/prepared-galaxy-catalog.test.ts b/packages/renderer/src/universe/prepared-galaxy-catalog.test.ts
index 54e0af739df..7689aa2c7c1 100644
--- a/packages/renderer/src/universe/prepared-galaxy-catalog.test.ts
+++ b/packages/renderer/src/universe/prepared-galaxy-catalog.test.ts
@@ -1,9 +1,7 @@
 import { readFileSync } from 'node:fs';
-import { test, mock } from 'node:test';
+import { test } from 'node:test';
 import assert from 'node:assert/strict';
-import { isDeepStrictEqual } from 'node:util';
 import { mountPreparedGalaxyCatalog } from './prepared-galaxy-catalog.js';
-import { screenPicking } from '../navigation/screen-picking.js';
 
 class Window {
   time = 0; next = 0; frames = new Map<number, (time: number) => void>();
@@ -26,293 +24,47 @@ class Element extends EventTarget {
 class Document { count = 0; defaultView = new Window(); createElement() { this.count++; return new Element(this); } }
 const read = (path: string) => JSON.parse(readFileSync(new URL(`../../../../src/objects/${path}`, import.meta.url), 'utf8'));
 
-test('alternate catalogue labels keep their side when space opens and throughout rejection fade', () => {
-  const payload = { ...read('local-group/prepared/catalogue.json'), objects: [] };
-  const nebulae = read('m42/source/nebula.json'), object = nebulae.objects[0];
+type Row = { id: string; name?: string; membership: { group: string }; detailedObjectId?: string };
+const mount = (extra: { galaxySample?: unknown } = {}) => {
+  const payload = read('local-group/prepared/catalogue.json');
   const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement,
-    before: before as unknown as HTMLElement, payload, nebulae, onSelect() {} });
+  const runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement, before: before as unknown as HTMLElement, payload, ...extra });
+  const world = { ...payload.frame, pose: { positionM: [0, 0, 1e24] as const, orientationXyzw: [0, 0, 0, 1] as const } };
   const viewport = { focalPixels: 600, principalOffsetPixels: [0, 0] as const, widthPixels: 800, heightPixels: 600 };
-  const world = { ...nebulae.frame, pose: { positionM: [object.positionM[0], object.positionM[1], object.positionM[2] + 1e17] as const,
-    orientationXyzw: [0, 0, 0, 1] as const } };
-  const label = runtime.inspect().labels[object.id]!;
-  runtime.publish(world, viewport, 0, [{ left: -150, right: 150, top: 5, bottom: 50 }], 0, 0, undefined, 1);
-  document.defaultView.advance(250);
-  const alternate = label.style.transform;
-  assert.ok(Number(label.style.opacity) > 0);
-  runtime.publish(world, viewport, 0, [], 0, 0, undefined, 1);
-  assert.equal(label.style.transform, alternate);
-  runtime.publish(world, viewport, 0, [{ left: -400, right: 400, top: -300, bottom: 300 }], 0, 0, undefined, 1);
-  document.defaultView.advance(300);
-  assert.ok(Number(label.style.opacity) > 0);
-  assert.equal(label.style.transform, alternate);
-  document.defaultView.advance(500);
-  assert.equal(Number(label.style.opacity), 0);
-  runtime.destroy();
-});
-
-test('nearby nebula labels wake and follow the camera while both extragalactic fades are zero', () => {
-  const payload = { ...read('local-group/prepared/catalogue.json'), objects: [] };
-  const nebulae = read('m42/source/nebula.json'), object = nebulae.objects[0];
-  const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const onSelect = mock.fn(() => {}), runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement,
-    before: before as unknown as HTMLElement, payload, nebulae, onSelect });
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0,0] as const, widthPixels: 800, heightPixels: 600 };
-  const camera = (z: number, x = 0) => ({ ...nebulae.frame, pose: {
-    positionM: [object.positionM[0] + x, object.positionM[1], object.positionM[2] + z] as const,
-    orientationXyzw: [0,0,0,1] as const } });
-  const label = runtime.inspect().labels[object.id]!, nodes = document.count;
-  runtime.publish(camera(-1e17), viewport, 0, [], 0);
-  assert.equal(label.style.pointerEvents, 'none');
-  runtime.publish(camera(1e17), viewport, 0, [], 0); document.defaultView.advance(250);
-  assert.equal(label.style.pointerEvents, 'none');
-  // Stellar context admits nebulae; planetary context does not.
-  runtime.publish(camera(1e17), viewport, 0, [], 0, 0, undefined, 1); document.defaultView.advance(500);
-  assert.equal(label.style.pointerEvents, 'auto'); assert.equal(Number(label.style.opacity), .65);
-  const transform = label.style.transform;
-  runtime.publish(camera(1e17, 1e16), viewport, 0, [], 0, 0, undefined, 1);
-  assert.notEqual(label.style.transform, transform);
-  label.dispatchEvent(new Event('click')); assert.ok(onSelect.mock.calls.some(call => isDeepStrictEqual(call.arguments, [object])));
-  assert.equal(document.count, nodes); runtime.destroy();
-});
-
-test('nebula label and its single-click target sit below the prepared cloud', () => {
-  const payload = { ...read('local-group/prepared/catalogue.json'), objects: [] };
-  const nebulae = read('m42/source/nebula.json'), object = nebulae.objects[0];
-  const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const onSelect = mock.fn(() => {}), runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement,
-    before: before as unknown as HTMLElement, payload, nebulae, onSelect,
-    nebulaFrames: new Map([[object.detailedObjectId, { ...nebulae.frame, originM: object.positionM,
-      localToReferenceXyzw: [0, 0, 0, 1], metersPerUnit: 1e15,
-      boundsUnits: { min: [-5, -10, -2], max: [5, 10, 2] } }]]) });
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0,0] as const, widthPixels: 800, heightPixels: 600 };
-  const pose = { ...nebulae.frame, pose: { positionM: [object.positionM[0], object.positionM[1], object.positionM[2] + 1e17] as const,
-    orientationXyzw: [0, 0, 0, 1] as const } };
-  runtime.select(object.id);
-  const rectangles = runtime.publish(pose, viewport, 0, [], 0, 0, undefined, 1), bottom = 600 * 1e16 / 9.8e16;
-  assert.equal(rectangles.length, 1);
-  assert.ok(Math.abs(rectangles[0]!.top - (bottom + 8)) < 10 ** -2 / 2, `${rectangles[0]!.top} is not close to ${bottom + 8}`);
-  const picking = screenPicking(host as unknown as HTMLElement), label = runtime.inspect().labels[object.id]!;
-  assert.equal(picking.pick(0, bottom + 12), label);
-  assert.equal(picking.pick(0, -12), null);
-  label.dispatchEvent(new Event('click')); assert.ok(onSelect.mock.calls.some(call => isDeepStrictEqual(call.arguments, [object])));
-  runtime.destroy();
-});
-
-test('one retained catalogue combines both classes; cluster fades and source-aware focus follow the same observer, and a cluster is named without a marker or outline', () => {
-  const payload = read('local-group/prepared/catalogue.json'), clusters = read('galaxy-clusters/prepared/catalogue.json');
-  // Local Group members and every galaxy with an object of its own (M81, NGC 253, M87 are not members).
-  const galaxyCount = payload.objects.filter((row: { membership: { group: string }; detailedObjectId?: string }) => row.membership.group === 'local-group' || row.detailedObjectId).length;
-  const document = new Document(), host = document.createElement(), before = document.createElement(), pickingHost = document.createElement(); host.append(before);
-  const picking = screenPicking(pickingHost as unknown as HTMLElement);
-  const onSelect = mock.fn(() => {});
-  const runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement, before: before as unknown as HTMLElement, payload, clusters, onSelect,
-    pickingHost: pickingHost as unknown as HTMLElement });
-  assert.equal(runtime.inspect().count, galaxyCount + clusters.objects.length);
-  assert.equal(runtime.inspect().clusterCount, clusters.objects.length);
-  const object = clusters.objects[0], nodes = document.count;
-  const pose = { referenceFrame: clusters.frame.referenceFrame, epochJdTt: clusters.frame.epochJdTt,
-    pose: { positionM: [object.positionM[0], object.positionM[1], object.positionM[2] + object.aperture.comovingRadiusM * 4] as const,
-      orientationXyzw: [0,0,0,1] as const } };
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0,0] as const, widthPixels: 800, heightPixels: 600 };
-  const label = runtime.inspect().labels[object.id]!, root = runtime.root as unknown as Element;
-  assert.equal(root.children.some(node => node.dataset.clusterAperture !== undefined || node.dataset.galaxyMarker === object.id), false, 'no outline or marker');
-  runtime.select(object.id);
-  runtime.publish(pose, viewport, 1, [], 0); document.defaultView.advance(250);
-  assert.equal(Number(label.style.opacity), 0); assert.equal(label.style.pointerEvents, 'none');
-  assert.notEqual(picking.pick(0, 15), label);
-  runtime.publish(pose, viewport, 1, [], 1); document.defaultView.advance(350);
-  assert.equal(picking.pick(0, 15), label);
-  assert.equal(screenPicking(host as unknown as HTMLElement).pick(0, 15), null);
-  assert.ok(Math.abs(Number(label.style.opacity) - (.325)) < 10 ** -2 / 2, `${Number(label.style.opacity)} is not close to ${.325}`);
-  const firstTransform = label.style.transform;
-  const shifted = { ...pose, pose: { ...pose.pose, positionM: [pose.pose.positionM[0] + object.aperture.comovingRadiusM, ...pose.pose.positionM.slice(1)] as [number,number,number] } };
-  const blockers = runtime.publish(shifted, viewport, 1, [], 1);
-  assert.notEqual(label.style.transform, firstTransform); assert.ok(blockers.length > 0);
-  runtime.publish(shifted, viewport, 1, [{ left: -400, right: 400, top: -300, bottom: 300 }], 1);
-  assert.equal(label.style.pointerEvents, 'none');
-  assert.notEqual(picking.pick(-150, 15), label);
-  label.dispatchEvent(new Event('click')); assert.equal(onSelect.mock.callCount(), 0);
-  document.defaultView.advance(400); assert.ok(Number(label.style.opacity) > 0); assert.ok(Number(label.style.opacity) < .325);
-  runtime.publish(shifted, viewport, 1, [], 1); document.defaultView.advance(600);
-  assert.equal(Number(label.style.opacity), .65); label.dispatchEvent(new Event('click'));
-  assert.ok(onSelect.mock.calls.some(call => isDeepStrictEqual(call.arguments, [object]))); assert.partialDeepStrictEqual(runtime.resolve(object.id), {kind: 'galaxy-cluster'});
-  assert.equal(document.count, nodes);
-  runtime.publish({ ...pose, pose: { ...pose.pose, positionM: [object.positionM[0], object.positionM[1], object.positionM[2] - object.aperture.comovingRadiusM * 4] } }, viewport, 1, [], 1);
-  document.defaultView.advance(800); assert.equal(Number(label.style.opacity), 0);
-  assert.notEqual(picking.pick(0, 15), label);
-  runtime.publish(pose, viewport, 1, [], 1);
-  assert.equal(picking.pick(0, 15), label);
-  runtime.destroy(); assert.equal(document.defaultView.frames.size, 0); assert.deepEqual(host.children, [before]);
-  assert.equal(picking.pick(0, 15), null);
-});
-
-test('only labels that show or are still fading out follow the camera', () => {
-  const payload = read('local-group/prepared/catalogue.json'), clusters = read('galaxy-clusters/prepared/catalogue.json');
-  const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement, before: before as unknown as HTMLElement, payload, clusters });
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0,0] as const, widthPixels: 800, heightPixels: 600 };
-  const observer = (x: number) => ({ referenceFrame: payload.frame.referenceFrame, epochJdTt: payload.frame.epochJdTt,
-    pose: { positionM: [x, 0, 1e23] as const, orientationXyzw: [0,0,0,1] as const } });
-  const root = runtime.root as unknown as Element, labels = Object.values(runtime.inspect().labels) as unknown as Element[];
-  const ids = (list: Element[]) => list.map(label => label.dataset.galaxyLabel);
-  const transforms = () => labels.map(label => label.style.transform);
-  runtime.publish(observer(0), viewport, 1); document.defaultView.advance(300);
-  const shown = labels.filter(label => Number(label.style.opacity) > 0);
-  assert.equal(shown.length, Number(root.dataset.visibleLabels));
-  // A cluster is named without a marker; every other shown label has one.
-  const clusterIds = new Set(clusters.objects.map((object: { id: string }) => object.id));
-  assert.ok(root.children.filter(node => node.dataset.galaxyMarker && node.style.transform).length >= shown.filter(label => !clusterIds.has(label.dataset.galaxyLabel)).length);
-  assert.deepEqual(ids(labels.filter(label => label.style.transform)), ids(shown));
-  // Covering the screen hides every label. Labels still fading out keep following their galaxies.
-  const cover = [{ left: -400, right: 400, top: -300, bottom: 300 }], previous = transforms();
-  runtime.publish(observer(1e21), viewport, 1, cover);
-  const fading = transforms();
-  assert.deepEqual(ids(labels.filter((_, index) => fading[index] !== previous[index])), ids(shown));
-  document.defaultView.advance(900);
-  runtime.publish(observer(2e21), viewport, 1, cover);
-  assert.deepEqual(transforms(), fading);
-  runtime.destroy();
-});
+  return { payload, document, runtime, world, viewport, root: runtime.root as unknown as Element };
+};
 
-test('catalogue-only rows remain dots without marker captions while saved catalogue links still resolve', () => {
-  const payload = read('local-group/prepared/catalogue.json');
-  const unsupported = payload.objects.find((row: {membership:{group:string};detailedObjectId?:string}) => row.membership.group === 'local-group' && !row.detailedObjectId);
-  const supported = payload.objects.find((row: {detailedObjectId?:string}) => row.detailedObjectId);
-  assert.ok(unsupported); assert.ok(supported);
-  const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const runtime = mountPreparedGalaxyCatalog({host:host as unknown as HTMLElement, before:before as unknown as HTMLElement,
-    payload, renderedObjectIds:new Set([supported.detailedObjectId])});
-  assert.deepEqual(runtime.resolve(unsupported.id), unsupported);
-  assert.notEqual(runtime.inspect().labels[unsupported.id], undefined);
-  assert.deepEqual(runtime.resolve(supported.id), supported);
-  assert.deepEqual(runtime.resolve(supported.detailedObjectId), supported);
-  assert.equal(runtime.inspect().count, payload.objects.filter((row: {membership:{group:string};detailedObjectId?:string}) => row.membership.group === 'local-group' || row.detailedObjectId).length);
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0,0] as const, widthPixels: 800, heightPixels: 600 };
-  const world = { ...payload.frame, pose: { positionM: [0,0,1e24] as const, orientationXyzw: [0,0,0,1] as const } };
+test('the catalogue draws one dot for each Local Group row without a package, and nothing else', () => {
+  const { payload, document, runtime, world, viewport, root } = mount();
+  const rows: Row[] = payload.objects, packaged = rows.filter(row => row.detailedObjectId);
+  assert.ok(packaged.length > 0);
+  assert.equal(runtime.inspect().count, rows.filter(row => row.name && !row.detailedObjectId && row.membership.group === 'local-group').length);
+  // A row with a package is a body of the world context: the catalogue draws no dot, marker or caption for it.
+  for (const row of packaged) assert.equal(root.children.some(node => node.dataset.galaxyDot === row.id), false);
+  assert.equal(root.children.every(node => node.dataset.galaxyDot !== undefined), true);
+  for (const id of ['hydra_1', 'leo_a', 'sagittarius_1']) assert.equal(root.children.some(node => node.dataset.galaxyDot === id), true);
   runtime.publish(world, viewport, 1); document.defaultView.advance(300);
-  const root = runtime.root as unknown as Element;
-  const dots = root.children.filter(node => node.dataset.galaxyDot && Number(node.style.opacity) > 0);
+  const dots = root.children.filter(node => Number(node.style.opacity) > 0);
   assert.ok(dots.length > 10);
-  assert.ok(Number(root.dataset.visibleLabels) <= 12);
-  const unsupportedLabel = runtime.inspect().labels[unsupported.id]!;
-  const unsupportedMarker = root.children.find(node => node.dataset.galaxyMarker === unsupported.id);
-  assert.equal(unsupportedLabel.style.pointerEvents, 'none');
-  assert.equal(Number(unsupportedLabel.style.opacity), 0);
-  assert.equal(root.children.some(node => node.dataset.galaxyLabel === unsupported.id), false);
-  assert.equal(unsupportedMarker, undefined);
-  for (const id of ['hydra_1', 'leo_a', 'sagittarius_1']) {
-    const row = payload.objects.find((object: {id: string}) => object.id === id);
-    assert.equal(row?.detailedObjectId, undefined);
-    assert.equal(root.children.some(node => node.dataset.galaxyDot === id), true);
-    assert.equal(root.children.some(node => node.dataset.galaxyLabel === id || node.dataset.galaxyMarker === id), false);
-  }
-  assert.equal(root.children.some(node => node.dataset.galaxyLabel === supported.id), true);
+  assert.equal(dots.every(dot => Number(dot.style.opacity) <= .4), true);
   runtime.publish(world, viewport, 0); document.defaultView.advance(600);
   assert.equal(dots.every(dot => Number(dot.style.opacity) === 0), true);
   runtime.destroy();
+  assert.equal(root.parent, null);
 });
 
-test('baked sparse sample shows dots before names without enabling unsupported navigation', () => {
-  const payload = read('local-group/prepared/catalogue.json');
+test('the baked display sample limits the dots to its rows', () => {
   const galaxySample = read('local-group/prepared/display-sample.json');
-  const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const onSelect = mock.fn(() => {});
-  const runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement, before: before as unknown as HTMLElement,
-    payload, galaxySample, onSelect });
+  const { payload, runtime } = mount({ galaxySample });
+  const rows: Row[] = payload.objects;
   assert.equal(galaxySample.ids.length, 48);
-  // The sample, and every galaxy with an object of its own.
-  assert.equal(runtime.inspect().count, 48 + payload.objects.filter((row: { detailedObjectId?: string }) => row.detailedObjectId).length);
-  const world = { ...payload.frame, pose: { positionM: [0,0,1e24] as const, orientationXyzw: [0,0,0,1] as const } };
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0,0] as const, widthPixels: 800, heightPixels: 600 };
-  runtime.publish(world, viewport, 0, [], 0, 1); document.defaultView.advance(300);
-  const root = runtime.root as unknown as Element;
-  assert.ok(root.children.filter(node => node.dataset.galaxyDot && Number(node.style.opacity) > 0).length > 20);
-  assert.equal(Number(root.dataset.visibleLabels), 0);
-  runtime.publish(world, viewport, 1, [], 0, 1); document.defaultView.advance(600);
-  assert.ok(Number(root.dataset.visibleLabels) > 0);
-  assert.ok(Number(root.dataset.visibleLabels) <= 12);
-  for (const id of galaxySample.ids) {
-    assert.equal(runtime.resolve(id)?.id, id);
-    assert.equal(runtime.inspect().labels[id]!.dataset.objectNavigate, undefined);
-    // Without data-object-navigate the label keeps the stylesheet's default cursor (world-context.css), never an inline one.
-    assert.equal(runtime.inspect().labels[id]!.style.cursor, undefined);
-    runtime.inspect().labels[id]!.dispatchEvent(new Event('click'));
-  }
-  assert.equal(onSelect.mock.callCount(), 0); runtime.destroy();
-  const css = readFileSync(new URL('../styles/world-context.css', import.meta.url), 'utf8');
-  assert.match(css, /\.prepared-galaxy-catalog \[data-galaxy-label\] \{\s*cursor: default;\s*\}/u);
-  assert.match(css, /\.prepared-galaxy-catalog \[data-galaxy-label\]\[data-object-navigate\] \{\s*cursor: pointer;\s*\}/u);
-});
-
-test('a focused catalogue-only row outside the display sample does not fabricate a marker and caption', () => {
-  const payload = read('local-group/prepared/catalogue.json');
-  const galaxySample = read('local-group/prepared/display-sample.json');
-  const object = payload.objects.find((row: { id: string }) => row.id === 'draco_2');
-  assert.ok(object); assert.ok(!galaxySample.ids.includes('draco_2'));
-  const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement, before: before as unknown as HTMLElement, payload, galaxySample, onSelect() {} });
-  const captions = () => { const found: Element[] = []; const walk = (node: Element) => { if (node.textContent === 'Draco II') found.push(node); node.children.forEach(walk); }; walk(host); return found; };
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0, 0] as const, widthPixels: 800, heightPixels: 600 };
-  const world = { ...payload.frame, pose: { positionM: [object.positionM[0], object.positionM[1], object.positionM[2] + 3.5e19] as const, orientationXyzw: [0, 0, 0, 1] as const } };
-  const shown = () => captions().some(label => Number(label.style.opacity) > 0);
-  runtime.publish(world, viewport, 1); document.defaultView.advance(400);
-  assert.equal(shown(), false);
-  runtime.select('draco_2');
-  runtime.publish(world, viewport, 1); document.defaultView.advance(800);
-  assert.equal(shown(), false);
-  runtime.select(null);
-  runtime.publish(world, viewport, 1); document.defaultView.advance(900); document.defaultView.advance(1400);
-  assert.equal(shown(), false);
+  assert.equal(runtime.inspect().count, galaxySample.ids.filter((id: string) => !rows.find(row => row.id === id)!.detailedObjectId).length);
   runtime.destroy();
+  assert.throws(() => mount({ galaxySample: { schema: 'cssearth-galaxy-display-sample@1', ids: ['not-a-row'] } }), /Invalid baked galaxy sample/u);
 });
 
-test('a galaxy with a published stellar extent hangs its caption under its drawn sphere and hides it inside the extent', () => {
-  const payload = read('local-group/prepared/catalogue.json'), lmc = payload.objects.find((row: { id: string }) => row.id === 'lmc');
-  const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const kpc = 3.0856775814913673e19;
-  const frame = { referenceFrame: payload.frame.referenceFrame, epochJdTt: payload.frame.epochJdTt, originM: lmc.positionM,
-    localToReferenceXyzw: [0, 0, 0, 1] as const, metersPerUnit: kpc, boundsUnits: { min: [-8, -8, -8] as const, max: [8, 8, 8] as const } };
-  const runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement, before: before as unknown as HTMLElement, payload,
-    renderedObjectIds: new Set(['lmc']), billboardedObjectIds: new Set(['lmc']),
-    galaxyCaptions: new Map([['lmc', { frame, drawnRadiusUnits: 5, extentRadiusUnits: 18.5 }]]) });
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0, 0] as const, widthPixels: 1600, heightPixels: 1200 };
-  const camera = (kpcAway: number) => ({ ...payload.frame, pose: { positionM: [lmc.positionM[0], lmc.positionM[1], lmc.positionM[2] + kpcAway * kpc] as const, orientationXyzw: [0, 0, 0, 1] as const } });
-  const label = runtime.inspect().labels.lmc!;
-  // 5 kpc seen from 200 kpc at a 600 px focal length drops 15 px; the caption's bottom is 8 px gap and 14 px of text below.
-  runtime.publish(camera(200), viewport, 1);
-  document.defaultView.advance(250);
-  assert.equal(label.style.transform, 'translate(0px,37px) translate(-50%,-100%)');
-  assert.ok(Number(label.style.opacity) > 0);
-  // Inside the 18.5 kpc extent the caption hides.
-  runtime.publish(camera(10), viewport, 1);
-  document.defaultView.advance(500);
-  assert.equal(Number(label.style.opacity), 0);
-  runtime.destroy();
-});
-test('a header pill category shows its labels at full strength and fades the other classes to a third', () => {
-  const payload = { ...read('local-group/prepared/catalogue.json'), objects: [] }, clusters = read('galaxy-clusters/prepared/catalogue.json');
-  const nebulae = read('m42/source/nebula.json');
-  const document = new Document(), host = document.createElement(), before = document.createElement(); host.append(before);
-  const runtime = mountPreparedGalaxyCatalog({ host: host as unknown as HTMLElement, before: before as unknown as HTMLElement, payload, clusters, nebulae });
-  const object = clusters.objects[0], label = runtime.inspect().labels[object.id]!, root = runtime.root as unknown as Element;
-  const pose = { referenceFrame: clusters.frame.referenceFrame, epochJdTt: clusters.frame.epochJdTt,
-    pose: { positionM: [object.positionM[0], object.positionM[1], object.positionM[2] + object.aperture.comovingRadiusM * 4] as const,
-      orientationXyzw: [0, 0, 0, 1] as const } };
-  const viewport = { focalPixels: 600, principalOffsetPixels: [0, 0] as const, widthPixels: 800, heightPixels: 600 };
-  const settle = (time: number) => { runtime.publish(pose, viewport, 1, [], 1); document.defaultView.advance(time); return Number(label.style.opacity); };
-  assert.equal(settle(400), .65);
-  runtime.highlight('galaxy-cluster');
-  assert.equal(root.dataset.highlighted, String(clusters.objects.length));
-  assert.equal(settle(800), 1);
-  // A category this layer does not draw leaves it as it was; the body markers carry that highlight.
-  runtime.highlight('galaxy');
-  assert.equal(root.dataset.highlighted, '0');
-  assert.equal(settle(1200), .65);
-  runtime.highlight('nebula');
-  assert.equal(root.dataset.highlighted, String(nebulae.objects.length));
-  assert.ok(Math.abs(settle(1600) - (.65 * .3)) < 10 ** -2 / 2, `${settle(1600)} is not close to ${.65 * .3}`);
-  runtime.highlight(null);
-  assert.equal(settle(2000), .65);
+test('a camera in another frame is refused', () => {
+  const { runtime, world, viewport } = mount();
+  assert.throws(() => runtime.publish({ ...world, epochJdTt: world.epochJdTt + 1 }, viewport, 1), /share a reference frame and epoch/u);
   runtime.destroy();
 });
diff --git a/packages/renderer/src/universe/prepared-galaxy-catalog.ts b/packages/renderer/src/universe/prepared-galaxy-catalog.ts
index 2e89d838f2a..2af3c276c4c 100644
--- a/packages/renderer/src/universe/prepared-galaxy-catalog.ts
+++ b/packages/renderer/src/universe/prepared-galaxy-catalog.ts
@@ -1,60 +1,21 @@
-import { mountCatalogMarker } from './catalog-marker.js';
-import { catalogueClassification, isPreparedCluster, isPreparedNebula, parsePreparedGalaxyCatalog, parsePreparedClusterCatalog, parsePreparedNebulaCatalog } from '@cssearth/catalog';
-import { matchesObjectClassification } from '@cssearth/objects';
+import { parsePreparedGalaxyCatalog, parsePreparedClusterCatalog, parsePreparedNebulaCatalog } from '@cssearth/catalog';
 import type { PreparedCatalogObject } from '@cssearth/catalog';
-import type { DensityVolumeFrame } from '@cssearth/objects';
 import type { WorldCameraPose, WorldCameraViewport } from '../navigation/world-camera.js';
-import type { LabelScreenRect } from '../labels/screen-label-layout.js';
 import { createOpacityFader } from '../stars/opacity-fader.js';
-import { admitGalaxyLabels, catalogVolumeCorners, projectCatalogBounds, projectCatalogPosition } from './galaxy-catalog-layout.js';
-import type { ProjectedGalaxy } from './galaxy-catalog-layout.js';
-import { screenPicking } from '../navigation/screen-picking.js';
-import { DEFAULT_CONTEXT_LABEL_OPACITY } from '../labels/label-presentation.js';
-import type { ScreenPickTarget } from '../navigation/screen-picking.js';
-import { createLabelBudget, labelEligible, type LabelBudget } from '../labels/universe-label-policy.js';
+import { projectCatalogPosition } from './galaxy-catalog-layout.js';
 
-import { projectGalaxyCaptionAnchor } from './galaxy-caption-anchor.js';
-interface Entry {
-  object: PreparedCatalogObject;
-  readonly marker: HTMLElement;
-  readonly dot: HTMLElement | null;
-  readonly navigable: boolean;
-  readonly label: HTMLElement;
-  readonly activate: (event: Event) => void;
-  readonly cornersM: readonly (readonly number[])[] | null;
-  /** The object's drawn sphere and published stellar extent: its caption hangs under the one, hides inside the other. */
-  readonly caption: GalaxyCaptionSource | null;
-  placement: number; shown: boolean;
-  width: number;
-  height: number;
-  /** This frame's projected label anchor; written to the label only while it shows or fades. */
-  labelX: number;
-  labelY: number;
-  /** Last published label interactivity; null until the first publication. */
-  interactive: boolean | null;
-  /** The marker's and dot's last written transform, so an unmoved marker writes nothing. */
-  transform: string;
-}
-
-export interface GalaxyCaptionSource { readonly frame: DensityVolumeFrame; readonly drawnRadiusUnits: number; readonly extentRadiusUnits: number }
+interface Dot { readonly object: PreparedCatalogObject; readonly element: HTMLElement; transform: string }
 
-/** One fixed catalogue bank, shared by every detailed scene and every camera focus. */
-export function mountPreparedGalaxyCatalog({ host, before, payload, clusters, galaxySample, nebulae, nebulaFrames, renderedObjectIds, billboardedObjectIds, galaxyCaptions, onSelect = () => {}, pickingHost = host }: {
-  host: HTMLElement; before: Element; payload: unknown; clusters?: unknown; nebulae?: unknown; onSelect?: (object: PreparedCatalogObject) => void; pickingHost?: HTMLElement;
-  nebulaFrames?: ReadonlyMap<string, DensityVolumeFrame>;
-  renderedObjectIds?: ReadonlySet<string>;
-  /** Objects whose own image marks them from afar: their caption stands without a ring over that image. */
-  billboardedObjectIds?: ReadonlySet<string>;
-  /** Objects with a published stellar extent, by detailed object id: their caption hangs under their drawn sphere and
-   * hides while the camera is inside the extent. */
-  galaxyCaptions?: ReadonlyMap<string, GalaxyCaptionSource>;
-  galaxySample?: unknown;
+/** The spatial catalogues as the universe draws them: one unobtrusive dot for each sampled Local Group galaxy that has no
+ * package of its own. A catalogue is data: its rows are never named, marked, picked or selected here. A galaxy, cluster or
+ * nebula with a package is a body of the world context (prepared-world-context.ts), drawn and named like any other. */
+export function mountPreparedGalaxyCatalog({ host, before, payload, clusters, galaxySample, nebulae }: {
+  host: HTMLElement; before: Element; payload: unknown; clusters?: unknown; nebulae?: unknown; galaxySample?: unknown;
 }) {
   const catalog = parsePreparedGalaxyCatalog(payload), document = host.ownerDocument;
   const clusterCatalog = clusters === undefined ? null : parsePreparedClusterCatalog(clusters);
-  if (clusterCatalog && (clusterCatalog.frame.referenceFrame !== catalog.frame.referenceFrame || clusterCatalog.frame.epochJdTt !== catalog.frame.epochJdTt)) throw new TypeError('Prepared catalogues must share one frame and epoch.');
   const nebulaCatalog = nebulae === undefined ? null : parsePreparedNebulaCatalog(nebulae);
-  if (nebulaCatalog && (nebulaCatalog.frame.referenceFrame !== catalog.frame.referenceFrame || nebulaCatalog.frame.epochJdTt !== catalog.frame.epochJdTt)) throw new TypeError('Prepared catalogues must share one frame and epoch.');
+  for (const other of [clusterCatalog, nebulaCatalog]) if (other && (other.frame.referenceFrame !== catalog.frame.referenceFrame || other.frame.epochJdTt !== catalog.frame.epochJdTt)) throw new TypeError('Prepared catalogues must share one frame and epoch.');
   let sampleIds: Set<string> | undefined;
   if (galaxySample !== undefined) {
     if (!galaxySample || typeof galaxySample !== 'object' || !('schema' in galaxySample) || galaxySample.schema !== 'cssearth-galaxy-display-sample@1' ||
@@ -62,207 +23,45 @@ export function mountPreparedGalaxyCatalog({ host, before, payload, clusters, ga
         !galaxySample.ids.every(id => typeof id === 'string' && catalog.objects.some(row => row.id === id && row.membership.group === 'local-group'))) throw new TypeError('Invalid baked galaxy sample.');
     sampleIds = new Set(galaxySample.ids);
   }
-  // Every galaxy with an object of its own is named (M81, NGC 253, M87 are not Local Group members); of the rest, the Local
-  // Group's sampled members.
-  const objects: readonly PreparedCatalogObject[] = [...catalog.objects.filter(object => object.detailedObjectId || object.membership.group === 'local-group' && (!sampleIds || sampleIds.has(object.id))), ...clusterCatalog?.objects ?? [], ...nebulaCatalog?.objects ?? []].filter(object => !isPreparedNebula(object) ||
-    Boolean(object.detailedObjectId && (!renderedObjectIds || renderedObjectIds.has(object.detailedObjectId))));
-  if (new Set(objects.map(object => object.id)).size !== objects.length) throw new TypeError('Prepared catalogue focus identifiers must be unique.');
   const root = document.createElement('div');
   root.className = 'prepared-galaxy-catalog';
-  // Zero-size root at the stage centre, children placed from it (world-context.css): a full-screen box above the globe
-  // became a full-screen layer. Dots and labels keep their fixed look there too; only their place, size, fade
-  // and pointer state are inline.
+  // Zero-size root at the stage centre, children placed from it (world-context.css).
   host.insertBefore(root, before);
-  const picking = screenPicking(pickingHost);
   const fader = createOpacityFader(document.defaultView!, undefined, { hideAtZero: true });
-  // The source bank also preserves Local Volume nonmembers for future scopes.
-  // Membership is a prepared scientific fact, never a runtime distance cut.
-  const createEntry = (object: PreparedCatalogObject): Entry => {
-    const marker = document.createElement('span'), label = document.createElement('span');
-    const navigable = isPreparedCluster(object) || Boolean(object.detailedObjectId && (!renderedObjectIds || renderedObjectIds.has(object.detailedObjectId)));
-    const dot = !isPreparedCluster(object) && !isPreparedNebula(object) ? document.createElement('span') : null;
-    if (dot) {
-      dot.dataset.galaxyDot = object.id;
-      dot.style.cssText = 'opacity:0;visibility:hidden';
-      root.append(dot);
-    }
-    marker.dataset.galaxyMarker = object.id;
-    mountCatalogMarker(marker, object);
-    label.dataset.galaxyLabel = object.id;
-    label.className = 'prepared-context-label';
-    if (navigable) label.dataset.objectNavigate = object.id;
-    label.dataset.objectNavigateActivation = 'click';
-    label.textContent = object.name;
-    label.title = isPreparedCluster(object) ? `${object.name} — MCXC-II centre` : object.status === 'candidate' ? `${object.name} — candidate galaxy` : object.name;
-    label.style.cssText = 'opacity:0;visibility:hidden';
-    const activate = (event: Event) => {
-      if (label.style.pointerEvents !== 'auto') return;
-      event.preventDefault(); event.stopPropagation(); onSelect(entry.object);
-    };
-    label.addEventListener(label.dataset.objectNavigateActivation, activate);
-    label.addEventListener('keydown', event => { if (event.key === 'Enter') activate(event); });
-    // A navigable label's pointer cursor follows its data-object-navigate attribute (world-context.css).
-    if (navigable) label.setAttribute('role', 'button');
-    label.tabIndex = -1;
-    // Catalogue-only rows have no prepared scene. Keep their dots, but do not
-    // mount inert marker/caption nodes that can resemble a destination. A cluster is its member galaxies' dots: its name
-    // alone marks it.
-    if (navigable) root.append(...isPreparedCluster(object) ? [label] : [marker, label]);
-    const frame = isPreparedNebula(object) ? nebulaFrames?.get(object.detailedObjectId ?? object.id) : undefined;
-    const caption = !isPreparedCluster(object) && object.detailedObjectId !== undefined ? galaxyCaptions?.get(object.detailedObjectId) ?? null : null;
-    const entry: Entry = { object, marker, dot, navigable, label, activate, cornersM: frame && !caption ? catalogVolumeCorners(frame) : null, caption,
-      placement: 0, shown: false, width: 0, height: 0, labelX: 0, labelY: 0, interactive: null, transform: '' };
-    return entry;
-  };
-  const entries: Entry[] = objects.filter(object => labelEligible({ named: Boolean(object.name), notable: isPreparedCluster(object) || Boolean(object.detailedObjectId) })).map(createEntry);
-  // Every catalogue row is a focus destination, but only the display sample is
-  // drawn as context. One retained entry carries the focused row that has no
-  // entry of its own, so the destination always shows its marker and caption.
-  const unsampled = catalog.objects.filter(object => object.name && !object.detailedObjectId && !entries.some(entry => entry.object.id === object.id));
-  const focusEntry = unsampled[0] ? createEntry(unsampled[0]) : null;
-  let focusBound = false;
-  let destroyed = false, selectedId: string | null = null;
-  // A header pill's category: its entries rank first in label admission.
-  let highlighted: ReadonlySet<string> = new Set();
-  let exclusions: readonly LabelScreenRect[] = [];
-  let dormant = false;
-  // Labels are measured when the catalogue first wakes, not at mount: reading
-  // their sizes then forced a layout of the whole starting page for labels that
-  // only appear at intergalactic range. Font changes mark the sizes stale.
-  let measured = false;
-  const measure = () => { measured = false; };
-  document.fonts?.addEventListener('loadingdone', measure);
+  // Membership is a prepared scientific fact, never a runtime distance cut. A row with a package is drawn by the world context.
+  const dots: Dot[] = catalog.objects.filter(object => object.name && !object.detailedObjectId && object.membership.group === 'local-group' && (!sampleIds || sampleIds.has(object.id))).map(object => {
+    const element = document.createElement('span');
+    element.dataset.galaxyDot = object.id;
+    element.style.cssText = 'opacity:0;visibility:hidden';
+    root.append(element);
+    return { object, element, transform: '' };
+  });
+  let destroyed = false, dormant = false;
   return Object.freeze({ root, catalog,
-    select(id: string | null) {
-      selectedId = entries.find(entry => entry.object.id === id || (!isPreparedCluster(entry.object) && entry.object.detailedObjectId === id))?.object.id ?? id;
-      if (!focusEntry) return;
-      const row = unsampled.find(object => object.id === selectedId);
-      if (row && row !== focusEntry.object) {
-        focusEntry.object = row; focusEntry.label.textContent = row.name;
-        focusEntry.label.title = row.status === 'candidate' ? `${row.name} — candidate galaxy` : row.name;
-        focusEntry.shown = false; focusEntry.placement = 0; focusEntry.width = 0;
-      }
-      if (!row && focusBound) for (const element of [focusEntry.label, focusEntry.marker, focusEntry.dot!]) fader.set(element, 0, 200);
-      focusBound = Boolean(row);
-    },
-    highlight(classification: string | null) {
-      highlighted = new Set(classification === null ? [] : entries.filter(entry =>
-        matchesObjectClassification(catalogueClassification(entry.object), classification)).map(entry => entry.object.id));
-      root.dataset.highlighted = String(highlighted.size);
-    },
-    resolve(id: string) { return [...catalog.objects, ...clusterCatalog?.objects ?? [], ...nebulaCatalog?.objects ?? []].find(object => object.id === id || (!isPreparedCluster(object) && object.detailedObjectId === id)) ?? null; },
-    publish(world: WorldCameraPose, viewport: WorldCameraViewport, opacity: number, blockerRects: readonly LabelScreenRect[] = [], clusterOpacity = opacity, dotOpacity = opacity,
-      budget?: LabelBudget, nebulaOpacity = opacity) {
-      if (destroyed) return exclusions;
+    publish(world: WorldCameraPose, viewport: WorldCameraViewport, opacity: number) {
+      if (destroyed) return;
       if (world.referenceFrame !== catalog.frame.referenceFrame || world.epochJdTt !== catalog.frame.epochJdTt) {
         throw new TypeError('Galaxy catalogue and observer must share a reference frame and epoch.');
       }
+      const alpha = Math.max(0, Math.min(1, opacity)) * .4;
+      // The dots sleep with their fade.
+      if (alpha === 0) { if (dormant) return; dormant = true; } else dormant = false;
       const width = viewport.widthPixels ?? host.clientWidth, height = viewport.heightPixels ?? host.clientHeight;
-      const candidates: ProjectedGalaxy[] = [];
-      const visible = new Set<string>();
-      const alpha = Math.max(0, Math.min(1, opacity));
-      const clusterAlpha = Math.max(0, Math.min(1, clusterOpacity));
-      const objectOpacity = (object: PreparedCatalogObject) =>
-        isPreparedCluster(object) ? clusterAlpha : isPreparedNebula(object) ? nebulaOpacity : alpha;
-      // Only the extragalactic populations sleep with their fades. Nearby
-      // nebulae keep following the camera and remain available as fly-to targets.
-      if (alpha === 0 && dotOpacity === 0 && clusterAlpha === 0 && !nebulaCatalog?.objects.length) {
-        if (dormant) return exclusions;
-        dormant = true;
-      } else dormant = false;
-      if (!measured && !dormant) {
-        for (const entry of entries) { entry.width = entry.label.offsetWidth; entry.height = entry.label.offsetHeight; }
-        measured = true;
-      }
-      const drawn = focusBound && focusEntry ? [...entries, focusEntry] : entries;
-      if (focusBound && focusEntry && !focusEntry.width) { focusEntry.width = focusEntry.label.offsetWidth; focusEntry.height = focusEntry.label.offsetHeight; }
-      for (const entry of drawn) {
-        const point = projectCatalogPosition(entry.object.positionM, world, viewport);
-        if (!point || !(width > 0 && height > 0)) continue;
-        const anchor = entry.caption ? projectGalaxyCaptionAnchor(world, viewport, entry.caption.frame, entry.caption.drawnRadiusUnits, entry.caption.extentRadiusUnits) : null;
-        // Inside its published extent the camera is within the galaxy: no caption names it from outside.
-        if (entry.caption && !anchor) continue;
-        const reach = anchor ? anchor.y - anchor.centreY : 4, centre = anchor ? { x: anchor.x, y: anchor.centreY } : point;
-        if (Math.abs(centre.x) > width / 2 + reach || Math.abs(centre.y) > height / 2 + reach) continue;
-        visible.add(entry.object.id);
-        // Written to both from one string, never read back from the style (a read serialises it).
-        const transform = `translate(${point.x}px,${point.y}px) translate(-50%,-50%)`;
-        if (transform !== entry.transform) {
-          entry.marker.style.transform = transform;
-          if (entry.dot) entry.dot.style.transform = transform;
-          entry.transform = transform;
-        }
-        const bounds = anchor ? { left: anchor.x - reach, right: anchor.x + reach, top: anchor.centreY - reach, bottom: anchor.y }
-          : entry.cornersM ? projectCatalogBounds(entry.cornersM, world, viewport) : null;
-        if (entry.cornersM && !bounds) continue;
-        const x = bounds ? (bounds.left + bounds.right) / 2 : point.x;
-        const y = (bounds?.bottom ?? point.y) + 8 + entry.height;
-        const labelRect = { left: x - entry.width / 2, right: x + entry.width / 2,
-          top: y - entry.height, bottom: y };
-        const objectAlpha = objectOpacity(entry.object);
-        {
-          const above = (bounds?.top ?? point.y) - 8;
-          const alternateLabelRects = entry.navigable ? [
-            { left: labelRect.left, right: labelRect.right, top: above - entry.height, bottom: above },
-            { left: (bounds?.right ?? point.x) + 12, right: (bounds?.right ?? point.x) + 12 + entry.width,
-              top: point.y - entry.height / 2, bottom: point.y + entry.height / 2 },
-            { left: (bounds?.left ?? point.x) - 12 - entry.width, right: (bounds?.left ?? point.x) - 12,
-              top: point.y - entry.height / 2, bottom: point.y + entry.height / 2 },
-          ] : [];
-          const previousRect = [labelRect, ...alternateLabelRects][entry.placement] ?? labelRect;
-          // A rejected label keeps following the same side throughout its fade.
-          entry.labelX = (previousRect.left + previousRect.right) / 2; entry.labelY = previousRect.bottom;
-          // A marker and caption promise an available destination. Catalogue-only
-          // rows remain as unobtrusive dots, but never enter the annotation layout.
-          if (objectAlpha > 0 && entry.navigable) candidates.push({ object: entry.object, navigable: true, shown: entry.shown, placement: entry.placement,
-            ...point, labelRect, alternateLabelRects });
-        }
-      }
-      const admitted = admitGalaxyLabels(candidates, blockerRects, selectedId, budget ?? createLabelBudget(width, height), highlighted);
-      // With a category highlighted its labels and markers show at full strength and the rest at a third, as the body markers do.
-      const emphasised = (entry: Entry, base: number) => highlighted.size === 0 ? base : highlighted.has(entry.object.id) ? 1 : base * .3;
-      const admittedById = new Map(admitted.map(entry => [entry.object.id, entry]));
-      const pickTargets: ScreenPickTarget[] = [];
-      for (const entry of drawn) {
-        const objectAlpha = objectOpacity(entry.object);
-        const projected = admittedById.get(entry.object.id);
-        entry.shown = Boolean(projected);
-        if (projected) { entry.placement = projected.placement ?? 0; entry.labelX = (projected.labelRect.left + projected.labelRect.right) / 2; entry.labelY = projected.labelRect.bottom; }
-        const labelOpacity = projected ? objectAlpha * emphasised(entry, DEFAULT_CONTEXT_LABEL_OPACITY) : 0;
-        fader.set(entry.label, labelOpacity, 200);
-        // Only a shown or still-fading label follows its galaxy. Moving every on-screen
-        // candidate restyled each hidden label on every camera frame.
-        if (visible.has(entry.object.id) && (projected || fader.current(entry.label) > 0)) {
-          entry.label.style.transform = `translate(${entry.labelX}px,${entry.labelY}px) translate(-50%,-100%)`;
-        }
-        const billboarded = !isPreparedCluster(entry.object) && entry.object.detailedObjectId !== undefined && billboardedObjectIds?.has(entry.object.detailedObjectId) === true;
-        fader.set(entry.marker, projected && !billboarded ? objectAlpha * emphasised(entry, .45) : 0, 200);
-        // Interactivity flips rarely; rewriting it for every galaxy each frame reflected three attributes.
-        if (entry.dot) fader.set(entry.dot, visible.has(entry.object.id) ? Math.max(0, Math.min(1, dotOpacity)) * (1 - (projected ? objectAlpha : 0)) * .4 : 0, 200);
-        const interactive = entry.navigable && labelOpacity > .1;
-        if (entry.interactive !== interactive) {
-          entry.label.style.pointerEvents = interactive ? 'auto' : 'none';
-          entry.label.tabIndex = interactive ? 0 : -1;
-          entry.label.ariaHidden = interactive ? 'false' : 'true';
-          entry.interactive = interactive;
+      for (const dot of dots) {
+        const point = width > 0 && height > 0 ? projectCatalogPosition(dot.object.positionM, world, viewport) : null;
+        const visible = point !== null && Math.abs(point.x) <= width / 2 + 4 && Math.abs(point.y) <= height / 2 + 4;
+        if (visible) {
+          // Never read back from the style (a read serialises it).
+          const transform = `translate(${point.x}px,${point.y}px) translate(-50%,-50%)`;
+          if (transform !== dot.transform) { dot.element.style.transform = transform; dot.transform = transform; }
         }
-        // Catalogue labels remain behind the focus point and detailed bodies.
-        if (projected && interactive) pickTargets.push({ element: entry.label, rank: -2,
-          shape: { kind: 'rect', ...projected.labelRect } });
+        fader.set(dot.element, visible ? alpha : 0, 200);
       }
-      picking.publish(root, pickTargets);
-      exclusions = admitted.map(entry => entry.labelRect);
-      root.dataset.visibleLabels = String(admitted.length);
-      root.dataset.catalogueCount = String(entries.length);
-      return exclusions;
+      root.dataset.catalogueCount = String(dots.length);
     },
-    inspect() { return { count: entries.length, clusterCount: clusterCatalog?.objects.length ?? 0, selectedId,
-      labels: Object.fromEntries(entries.map(entry => [entry.object.id, entry.label])) }; },
+    inspect() { return { count: dots.length, clusterCount: clusterCatalog?.objects.length ?? 0 }; },
     destroy() {
       if (destroyed) return; destroyed = true; fader.destroy();
-      picking.remove(root);
-      document.fonts?.removeEventListener('loadingdone', measure);
-      for (const entry of entries) entry.label.removeEventListener(entry.label.dataset.objectNavigateActivation!, entry.activate);
       root.remove();
     },
   });
diff --git a/packages/renderer/src/universe/prepared-universe-runtime.ts b/packages/renderer/src/universe/prepared-universe-runtime.ts
index 6bdb8e40bc4..7701ae9957e 100644
--- a/packages/renderer/src/universe/prepared-universe-runtime.ts
+++ b/packages/renderer/src/universe/prepared-universe-runtime.ts
@@ -16,9 +16,9 @@ import type { PreparedCssSurfaceShell } from '../shell/types.js';
 import { mountPreparedCssSurfaceShell } from '../shell/prepared-shell-runtime.js';
 import { mountEnvironmentLabels } from './environment-labels.js';
 import { isPreparedCluster, type PreparedCatalogObject } from '@cssearth/catalog';
-import type { PreparedNavigationFocus } from '../navigation/prepared-focus.js';
 import type { PreparedLabelEdge } from '../navigation/prepared-label-edge.js';
 import { detailedFocusContextOpacity, selectedBodyContextOpacity } from './detailed-focus-context.js';
+import type { SelectedBank } from './detailed-focus-context.js';
 import { DEFAULT_POINT_VISIBILITY } from '../volume/projected-volume-visibility.js';
 import type { WorldContextFrame } from './world-context/world-context-frame.js';
 import { createWorldContextPlannerClient } from './world-context/world-context-planner-client.js';
@@ -126,8 +126,8 @@ export function createPreparedUniverse({ context, volume, pointAppearance, resol
       for (const layer of layers) layer.addBodies(plan, nextSprites);
       for (const planner of planners) planner.extend(plan);
     },
-    mount(stage: HTMLElement, { onSelectGalaxy, requestPublication, presentationHost = stage }: {
-      onSelectGalaxy?: (object: PreparedCatalogObject) => void; requestPublication?: () => boolean;
+    mount(stage: HTMLElement, { requestPublication, presentationHost = stage }: {
+      requestPublication?: () => boolean;
       /** Stationary world presentation, outside the selected detail's CSS scope. */
       presentationHost?: HTMLElement;
     } = {}) {
@@ -191,7 +191,7 @@ export function createPreparedUniverse({ context, volume, pointAppearance, resol
         const catalogBanks = createUniverseCatalogBanks({ root, end, stage, lifetime,
           declarations: declaredImageLayers, initialImages: initialImageLayers, volumeDeclarations: volumeDatasetBanks,
           pointBanks,
-          initialCatalog: catalog, catalogBank, loadCatalog, loadImageLayer, onSelect: onSelectGalaxy, requestPublication, billboards: datasetBillboards, stellarExtents, prepareBillboardAtlas });
+          initialCatalog: catalog, catalogBank, loadCatalog, loadImageLayer, requestPublication, billboards: datasetBillboards, stellarExtents, prepareBillboardAtlas });
         let labelBudget = createLabelBudget(0, 0);
         let labelBlockers: readonly LabelScreenRect[] = [];
         let overview = false;
@@ -206,10 +206,12 @@ export function createPreparedUniverse({ context, volume, pointAppearance, resol
         let previewCaption: typeof selected | null = null;
         let selectedEdge: PreparedLabelEdge | undefined, previewEdge: PreparedLabelEdge | undefined;
         const caption = () => previewCaption ?? captionBody;
-        const captionFlags = () => ({ overview: selectionPreview ? false : overview, focused: detailedFocus !== null, preview: selectionPreview, edge: previewCaption ? previewEdge : selectedEdge });
-        let detailedFocus: { objectId: string; focus: PreparedNavigationFocus } | null = null;
-        const pointBankIds = new Set(pointBanks.map(bank => bank.id));
-        let selectedPoints: string | undefined;
+        const captionFlags = () => ({ overview: selectionPreview ? false : overview, preview: selectionPreview, edge: previewCaption ? previewEdge : selectedEdge });
+        // The bank the mounted scene's dataset shows as its companion: its subject, drawn whole while it is shown.
+        let companion: string | null = null;
+        // The banks that are a scene's whole subject: a galaxy's image layers, and a volume that is not attached to a body.
+        const subjectBanks = new Set([...declaredImageLayers.map(bank => bank.id), ...volumeDatasetBanks.filter((_, index) => !datasetFacts[index]!.attached).map(bank => bank.id)]);
+        const bankOf = (id: string) => datasets.focusBank(id) ?? catalogBanks.focusBank(id);
         background.mount();
         catalogBanks.loadInitialImages();
         for (const shell of shells) shellLayers.push(own(mountPreparedCssSurfaceShell({ host: root, before: end, ...shell })));
@@ -241,31 +243,20 @@ export function createPreparedUniverse({ context, volume, pointAppearance, resol
             environmentLabels.addShell(shell.payload);
             requestPublication?.();
           },
-          selectGalaxy(id: string | null, focus: PreparedNavigationFocus | null = null) {
-            if (focus && (focus.id !== id || !Number.isFinite(focus.framingRadiusM) || focus.framingRadiusM <= 0 ||
-                focus.positionM.length !== 3 || !focus.positionM.every(Number.isFinite))) {
-              throw new TypeError('Prepared context focus must match its selection and have finite authored framing.');
-            }
-            const record = id ? catalogBanks.catalog?.resolve(id) : null;
-            const objectId = record && !isPreparedCluster(record) ? record.detailedObjectId : undefined;
-            const next = focus && objectId && [...declaredImageLayers, ...volumeDatasetBanks].some(bank => bank.id === objectId)
-              ? { objectId, focus } : null;
-            const changed = next?.objectId !== detailedFocus?.objectId || next?.focus.framingRadiusM !== detailedFocus?.focus.framingRadiusM ||
-              next?.focus.positionM.some((value, axis) => value !== detailedFocus?.focus.positionM[axis]);
-            detailedFocus = next;
-            // A package of catalogue dots draws them for its selected row, without the detailed focus's context fade.
-            const points = record?.detailedObjectId !== undefined && pointBankIds.has(record.detailedObjectId) ? record.detailedObjectId : undefined;
-            const pointsChanged = points !== selectedPoints;
-            selectedPoints = points;
-            catalogBanks.catalog?.select(id);
-            if (pointsChanged) requestPublication?.();
-            if (changed) requestPublication?.();
-          },
-          resolveGalaxy(id: string) { return catalogBanks.catalog?.resolve(id) ?? null; },
           ensureGalaxyCatalog: catalogBanks.ensureCatalog,
-          focusBank(id: string) { return datasets.focusBank(id) ?? catalogBanks.focusBank(id); },
-          setVolumeDatasetEnabled: datasets.setEnabled,
-          selectVolumeDataset: datasets.select,
+          focusBank: bankOf,
+          setVolumeDatasetEnabled(id: string, enabled: boolean) {
+            if (lifetime.disposed) return;
+            if (!bankOf(id)) throw new TypeError(`Unknown prepared bank: ${id}.`);
+            datasets.setEnabled(id, enabled);
+            if (enabled) companion = id; else if (companion === id) companion = null;
+            requestPublication?.();
+          },
+          selectVolumeDataset(id: string, dataset: string) {
+            const bank = bankOf(id);
+            if (!bank) throw new TypeError(`Unknown prepared bank: ${id}.`);
+            bank.selectDataset(dataset);
+          },
           captureFrame(world: WorldCameraPose, viewport: WorldCameraViewport) {
             // The context's labels keep clear of the selected body's caption, placed for the same camera.
             const rect = selectedLabel.rect(world, viewport, caption(), captionFlags());
@@ -293,7 +284,6 @@ export function createPreparedUniverse({ context, volume, pointAppearance, resol
           setNavigationInFlight(active: boolean) { spatial.setNavigationInFlight(active); focusPoint?.setNavigationEnabled(!active); },
           /** A header pill's category: the galaxy, cluster and nebula catalogue emphasises its members; the body markers take
            * theirs through `setBodyVisibility`. */
-          setHighlightedClassification: catalogBanks.setHighlightedClassification,
           /** Label suppression follows the selection here; callers set the other flags. */
           setBodyVisibility(next: Omit<BodyVisibility, 'labelSuppressed'>) { spatial.setBodyVisibility(next); },
           setRotationActive(active: boolean) { spatial.setRotationActive(active); },
@@ -325,6 +315,12 @@ export function createPreparedUniverse({ context, volume, pointAppearance, resol
             if (lifetime.disposed) return;
             opacityClock.batch(() => {
               const distanceM = Math.hypot(...world.pose.positionM.map((value, axis) => value - plan.focus.positionM[axis]));
+              // A companion that is its scene's whole subject (a galaxy's layers, a nebula's volume) is framed as a body is, by
+              // the selected body's place and radius, and the context gives way to it. A volume attached to a body (a star's
+              // disc) and a bank of dots (a cluster's members) show beside what is there and dim nothing. Until the scene's
+              // own body is selected the companion has nothing to be framed by.
+              const detailedFocus: { objectId: string; focus: SelectedBank } | null = companion === null || !subjectBanks.has(companion) || selected === plan.focus ? null
+                : { objectId: companion, focus: { positionM: selected.positionM as SelectedBank['positionM'], framingRadiusM: selected.radiusM } };
               const detailContextOpacity = detailedFocusContextOpacity(world, detailedFocus?.focus ?? null);
               if (detailContextOpacity > 0) background.prefetch(distanceM);
               const outsideGalaxy = galaxyOutsideFade(
@@ -346,7 +342,7 @@ export function createPreparedUniverse({ context, volume, pointAppearance, resol
               const insideGalaxy = catalogBanks.imageBankContaining(selected.positionM);
               catalogBanks.publishImages(world, viewport, volumeOpacity, detailedFocus?.objectId, insideGalaxy === undefined || insideGalaxy === detailedFocus?.objectId ? undefined
                 : { objectId: insideGalaxy, opacity: logarithmicFade(Math.hypot(...world.pose.positionM.map((value, axis) => value - selected.positionM[axis]!)), plan.stars.fadeStartDistanceM, plan.stars.fullDistanceM) });
-              catalogBanks.publishPoints(world, viewport, selectedPoints, selectedSystem);
+              catalogBanks.publishPoints(world, viewport, companion ?? undefined, selectedSystem);
               datasets.publish(world, viewport, volumeOpacity, detailContextOpacity, detailedFocus?.objectId,
                 selectedBodyContextOpacity(world, viewport, captionBody));
               for (const [index, shell] of shellLayers.entries()) {
@@ -363,13 +359,9 @@ export function createPreparedUniverse({ context, volume, pointAppearance, resol
                 shellStats: shellLayers.map(shell => shell.stats()), blockerRects: foregroundRects, labelBudget });
               const catalogPresentation = catalogBanks.presentation;
               if (catalogPresentation) {
-                const galaxyOpacity = localAnnotations * logarithmicFade(distanceM, catalogPresentation.fadeStartDistanceM, catalogPresentation.fullDistanceM);
-                // The clusters lie inside the cosmic microwave background: their names give way as it closes over them.
-                const clusterOpacity = (catalogPresentation.clusters ? logarithmicFade(distanceM, catalogPresentation.clusters.fadeStartDistanceM, catalogPresentation.clusters.fullDistanceM) : 0) * (1 - meshCover);
                 const dotOpacity = (1 - logarithmicFade(distanceM, 30e6 * 3.085677581491367e16, 120e6 * 3.085677581491367e16)) * logarithmicFade(distanceM, catalogPresentation.fadeStartDistanceM, catalogPresentation.fullDistanceM);
-                const nebulaOpacity = (1 - fade) * logarithmicFade(distanceM, plan.stars.fadeStartDistanceM, plan.stars.fullDistanceM);
-                if (!catalogBanks.catalog && Math.max(galaxyOpacity, clusterOpacity, dotOpacity, nebulaOpacity) > 0) void catalogBanks.ensureCatalog().catch(() => {});
-                catalogBanks.catalog?.publish(world, viewport, galaxyOpacity, [...foregroundRects, ...environmentRects], clusterOpacity, dotOpacity, labelBudget, nebulaOpacity);
+                if (!catalogBanks.catalog && dotOpacity > 0) void catalogBanks.ensureCatalog().catch(() => {});
+                catalogBanks.catalog?.publish(world, viewport, dotOpacity);
               }
               const emphasizedId = selectionPreview === undefined ? (overview ? null : selected.id) : selectionPreview;
               focusPoint?.publish(world, viewport, { opacity: (1 - fade) * (emphasizedId !== null && emphasizedId !== plan.focus.id ? .75 : 1), selectedDetail: selected.id === plan.focus.id,
diff --git a/packages/renderer/src/universe/selected-body-label.ts b/packages/renderer/src/universe/selected-body-label.ts
index 7e695a2d791..d922a26a843 100644
--- a/packages/renderer/src/universe/selected-body-label.ts
+++ b/packages/renderer/src/universe/selected-body-label.ts
@@ -14,7 +14,7 @@ const VIEWPORT_EDGE_PX = 4;
 const HEADER_CLEARANCE_PX = 64;
 const FOOTER_CLEARANCE_PX = 30;
 
-export interface SelectedLabelFlags { overview: boolean; focused: boolean; preview: string | null | undefined; edge?: PreparedLabelEdge }
+export interface SelectedLabelFlags { overview: boolean; preview: string | null | undefined; edge?: PreparedLabelEdge }
 interface SelectedLabelPlacement { left: number; top: number; rect: LabelScreenRect }
 
 /** What a caption is placed from: a body's centre and radius, and where its package asks for the caption. */
@@ -23,8 +23,8 @@ export type CaptionedBody = Pick<PreparedContextPoint, 'positionM' | 'radiusM'>
 /** Where the caption of `body` sits for this camera, or null when it is hidden: below the body's disc or point, clear of the
  * header and footer, or over the body's middle when its package asks. */
 export function placeSelectedBodyLabel(world: WorldCameraPose, viewport: WorldCameraViewport, body: CaptionedBody,
-  { overview, focused, preview, edge }: SelectedLabelFlags, width: number, height: number): SelectedLabelPlacement | null {
-  if (overview || focused || preview !== undefined && preview !== body.id) return null;
+  { overview, preview, edge }: SelectedLabelFlags, width: number, height: number): SelectedLabelPlacement | null {
+  if (overview || preview !== undefined && preview !== body.id) return null;
   const widthPixels = viewport.widthPixels, heightPixels = viewport.heightPixels;
   // The caption stays below the shell header where the viewport measures one, else below a fixed clearance.
   const headerClearance = viewport.coveredTopPixels ?? HEADER_CLEARANCE_PX;
@@ -101,7 +101,7 @@ export function mountSelectedBodyLabel(host: HTMLElement, opacityClock: OpacityC
     },
     publish(world: WorldCameraPose, viewport: WorldCameraViewport, body: PreparedContextPoint, flags: SelectedLabelFlags): LabelScreenRect | null {
       const hide = () => { fader.set(label, 0); return null; };
-      if (flags.overview || flags.focused || flags.preview !== undefined && flags.preview !== body.id) return hide();
+      if (flags.overview || flags.preview !== undefined && flags.preview !== body.id) return hide();
       measure(body);
       if (measuredId !== body.id) return hide();
       const placement = placeSelectedBodyLabel(world, viewport, body, flags, width, height);
diff --git a/packages/renderer/src/universe/universe-catalog-banks.ts b/packages/renderer/src/universe/universe-catalog-banks.ts
index 9bfc30b3ffb..83e9757c6a3 100644
--- a/packages/renderer/src/universe/universe-catalog-banks.ts
+++ b/packages/renderer/src/universe/universe-catalog-banks.ts
@@ -1,4 +1,4 @@
-import { createImageFocusBank } from './prepared-focus-bank.js';
+import { createImageFocusBank, createPointFocusBank } from './prepared-focus-bank.js';
 import type { SceneLifetime } from '@cssearth/engine';
 import type { PreparedCatalogObject } from '@cssearth/catalog';
 import type { DensityVolumeFrame } from '@cssearth/objects';
@@ -29,7 +29,7 @@ interface ImageBank {
 
 /** Catalogue and image layers remain descriptor-only until visibility or navigation admits them. */
 export function createUniverseCatalogBanks({ root, end, stage, lifetime, declarations, initialImages, volumeDeclarations,
-  initialCatalog, catalogBank, loadCatalog, loadImageLayer, onSelect, requestPublication, billboards: prepared, stellarExtents = {}, prepareBillboardAtlas,
+  initialCatalog, catalogBank, loadCatalog, loadImageLayer, requestPublication, billboards: prepared, stellarExtents = {}, prepareBillboardAtlas,
   pointBanks = [] }: {
   root: HTMLElement; end: Element; stage: HTMLElement; lifetime: SceneLifetime;
   declarations: readonly { id: string; frame: DensityVolumeFrame }[];
@@ -39,7 +39,6 @@ export function createUniverseCatalogBanks({ root, end, stage, lifetime, declara
   catalogBank: PreparedUniverseOptions['catalogBank'];
   loadCatalog: PreparedUniverseOptions['loadCatalog'];
   loadImageLayer: PreparedUniverseOptions['loadImageLayer'];
-  onSelect?: (object: PreparedCatalogObject) => void;
   requestPublication?: () => boolean;
   prepareBillboardAtlas: () => boolean;
   /** Published stellar extents in metres by object id (PreparedUniverseOptions.stellarExtents). */
@@ -50,8 +49,6 @@ export function createUniverseCatalogBanks({ root, end, stage, lifetime, declara
   pointBanks?: PreparedUniverseOptions['pointBanks'];
 }) {
   let catalog: ReturnType<typeof mountPreparedGalaxyCatalog> | null = null;
-  // The header pill's category, applied again when the catalogue mounts after it was pressed.
-  let highlightedClassification: string | null = null;
   let catalogPayload = initialCatalog, catalogLoading: Promise<void> | null = null;
   let billboardCount = 0;
   const images: ImageBank[] = declarations.map(bank => {
@@ -100,24 +97,9 @@ export function createUniverseCatalogBanks({ root, end, stage, lifetime, declara
     if (catalog || lifetime.disposed) return;
     globalThis.performance?.mark?.('cssEarth:catalog:mount');
     catalog = mountPreparedGalaxyCatalog({ host: root, before: end, payload: bank.payload, galaxySample: bank.galaxySample,
-      clusters: bank.clusters?.payload, nebulae: bank.nebulae,
-      renderedObjectIds: new Set([...declarations.map(image => image.id), ...volumeDeclarations.map(dataset => dataset.id)]),
-      billboardedObjectIds: new Set([...prepared?.plan.banks.values() ?? []].filter(bank => bank.billboard).map(bank => bank.id)),
-      galaxyCaptions: galaxyCaptions(),
-      nebulaFrames: new Map(volumeDeclarations.map(dataset => [dataset.id, dataset.frame])), onSelect, pickingHost: stage });
-    catalog.highlight(highlightedClassification);
+      clusters: bank.clusters?.payload, nebulae: bank.nebulae });
     publishResidency();
   }
-  /** Every bank with a published stellar extent: its caption hangs under its authored framing sphere (else its
-   * billboard's), and hides inside the extent. */
-  function galaxyCaptions() {
-    return new Map([...declarations, ...volumeDeclarations].flatMap(bank => {
-      const radiusM = stellarExtents[bank.id], facts = prepared?.plan.banks.get(bank.id);
-      const extentRadiusUnits = radiusM === undefined ? 0 : radiusM / bank.frame.metersPerUnit;
-      const drawnRadiusUnits = facts?.framingRadiusUnits ?? facts?.billboard?.radiusUnits ?? extentRadiusUnits;
-      return radiusM === undefined ? [] : [[bank.id, { frame: bank.frame, drawnRadiusUnits, extentRadiusUnits }] as const];
-    }));
-  }
   function ensureCatalog(): Promise<void> {
     if (lifetime.disposed || catalog) return Promise.resolve();
     if (catalogPayload) { mountCatalog(catalogPayload); return Promise.resolve(); }
@@ -156,11 +138,6 @@ export function createUniverseCatalogBanks({ root, end, stage, lifetime, declara
 
   return {
     get catalog() { return catalog; },
-    setHighlightedClassification(classification: string | null) {
-      highlightedClassification = classification;
-      catalog?.highlight(classification);
-      requestPublication?.();
-    },
     get presentation() { return catalogPayload ?? catalogBank; },
     ensureCatalog,
     publishResidency,
@@ -170,7 +147,9 @@ export function createUniverseCatalogBanks({ root, end, stage, lifetime, declara
     mountInitialCatalog() { if (catalogPayload) mountCatalog(catalogPayload); },
     focusBank(id: string) {
       const bank = byId.get(id);
-      return bank ? createImageFocusBank(bank.id, bank.frame, () => ensureImage(bank)) : null;
+      if (bank) return createImageFocusBank(bank.id, bank.frame, () => ensureImage(bank));
+      // A bank of dots has one dataset, its members; the dots mount when they are first shown.
+      return points.some(point => point.id === id) ? createPointFocusBank(id) : null;
     },
     /** Draw the selected package's catalogue dots, and those of the selected body's system (`systemIds`: the body and the
      * centre it orbits), and hide every other's. */
@@ -196,9 +175,9 @@ export function createUniverseCatalogBanks({ root, end, stage, lifetime, declara
       inside?: { readonly objectId: string; readonly opacity: number }) {
       if (lifetime.disposed) return;
       for (const bank of images) {
-        // A galaxy's slices paint only for the observer who selected it.
-        const presentationOpacity = bank.id === detailedObjectId ? 1 : 0;
-        const opacity = presentationOpacity * volumeOpacity * projectedVolumeOpacity(world, viewport, bank.frame, bank.radiusUnits);
+        // A galaxy's slices paint only for the observer who selected it, at any distance from it: the context's distance
+        // fade is measured from the selected body, which is the galaxy itself.
+        const opacity = bank.id === detailedObjectId ? projectedVolumeOpacity(world, viewport, bank.frame, bank.radiusUnits) : 0;
         // Its billboard shows it from everywhere else, and gives way as the loaded slices fade in.
         if (billboards && bank.billboardIndex >= 0) {
           const context = bank.independent ? 1 : volumeOpacity;
diff --git a/packages/renderer/src/universe/world-context/context-scale.ts b/packages/renderer/src/universe/world-context/context-scale.ts
index a7c9c9d154d..d6092b9687a 100644
--- a/packages/renderer/src/universe/world-context/context-scale.ts
+++ b/packages/renderer/src/universe/world-context/context-scale.ts
@@ -33,6 +33,17 @@ export function logarithmicFade(distanceM: number, startM: number, endM: number)
   return t * t * (3 - 2 * t);
 }
 
+const PARSEC_M = 3.085677581491367e16;
+/** How far gone a galaxy or a cluster of galaxies is, 0 to 1, by the camera's distance from the focus; null for any other
+ * body. Each is named at its own scale (UI thresholds, the ones the catalogue drew them by): a galaxy from 1 to 10 kpc out,
+ * giving way over 12 to 40 Mpc; a cluster from 3 to 10 Mpc out. A nebula or a globular cluster is a body of the Milky Way
+ * and fades as its stars do. */
+export function extendedRetirement(classification: string | undefined, cameraFromFocusM: number): number | null {
+  if (classification === 'galaxy') return 1 - logarithmicFade(cameraFromFocusM, 1e3 * PARSEC_M, 10e3 * PARSEC_M) * (1 - logarithmicFade(cameraFromFocusM, 12e6 * PARSEC_M, 40e6 * PARSEC_M));
+  if (classification === 'galaxy-cluster') return 1 - logarithmicFade(cameraFromFocusM, 3e6 * PARSEC_M, 10e6 * PARSEC_M);
+  return null;
+}
+
 /** Each planetary system fades with the camera's distance from its own star: the Sun's
  * and every placed star with orbiting bodies. The context retires once all of them have. */
 export function createSystemFade(plan: Pick<PreparedWorldContext, 'focus' | 'bodies' | 'orbitCenters' | 'system'>) {
diff --git a/packages/renderer/src/universe/world-context/world-context-planner.test.ts b/packages/renderer/src/universe/world-context/world-context-planner.test.ts
index 6c77207115b..ea3875f09e8 100644
--- a/packages/renderer/src/universe/world-context/world-context-planner.test.ts
+++ b/packages/renderer/src/universe/world-context/world-context-planner.test.ts
@@ -1,3 +1,4 @@
+import { isExtendedClassification } from '@cssearth/objects';
 import { readFile } from 'node:fs/promises';
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
@@ -736,12 +737,14 @@ test('a notable star beyond the Solar System is named before the Solar System co
 
 test('past the Local Group scale the stars give their names to the galaxies', async () => {
   const { calculate, input } = await namedAlphaCentauri();
-  const named = (parsecs: number) => {
+  const labelled = (parsecs: number) => {
     input.world.pose.positionM = [0, 0, parsecs * 3.085677581491367e16];
-    return calculate(input).projectedBodies.filter(body => body.labelShown).map(body => [plan.focus, ...plan.bodies][body.index]!.id);
+    return calculate(input).projectedBodies.filter(body => body.labelShown).map(body => [plan.focus, ...plan.bodies][body.index]!);
   };
+  const named = (parsecs: number) => labelled(parsecs).filter(body => !('classification' in body && isExtendedClassification(body.classification))).map(body => body.id);
   { const values = named(200e3); assert.ok(['sun', 'sgr-a-star'].every(item => values.includes(item)), 'from 200 kpc, short of the Local Group scale, the Sun and Sgr A* keep their names'); }
   assert.deepEqual(named(1e6), [], 'from 1 Mpc no star or planet is named');
+  { const values = labelled(1e6).map(body => body.id); assert.ok(['lmc', 'smc'].every(item => values.includes(item)), 'from 1 Mpc the galaxies are'); }
 });
 
 test('past the Solar System only the featured stars and the references keep a dot; past the Local Group no body does', () => {
@@ -750,13 +753,15 @@ test('past the Solar System only the featured stars and the references keep a do
   const calculate = createWorldContextPlanner(plan, { [featured]: FEATURED_STAR_TIER }), input = view();
   const dotted = (parsecs: number) => {
     input.world.pose.positionM = [0, 0, parsecs * 3.085677581491367e16];
-    return calculate(input).projectedBodies.filter(body => body.markerOpacity > 0).map(body => [plan.focus, ...plan.bodies][body.index]!.id);
+    // The galaxies, clusters and nebulae are bodies too, and keep their own dots: this is about the stars and their planets.
+    return calculate(input).projectedBodies.filter(body => body.markerOpacity > 0).map(body => [plan.focus, ...plan.bodies][body.index]!)
+      .filter(body => !('classification' in body && isExtendedClassification(body.classification))).map(body => body.id);
   };
   const nearby = dotted(3e3);
   { const values = nearby; assert.ok(['sun', featured].every(item => values.includes(item)), 'from 3 kpc above the Sun the Sun and the featured star stay (Sgr A* is out of frame)'); }
-  assert.ok(nearby.length < 10, 'from 3 kpc the other stars have given way to the catalogue dots');
+  assert.ok(nearby.length < 10, 'from 3 kpc the other stars have given way');
   { const values = dotted(200e3); assert.ok(['sgr-a-star', 'sun'].every(item => values.includes(item)), 'from 200 kpc the references keep a dot'); }
-  assert.deepEqual(dotted(1e6), [], 'from 1 Mpc, in the overview, no body keeps a dot');
+  assert.deepEqual(dotted(1e6), [], 'from 1 Mpc, in the overview, no star or planet keeps a dot');
 });
 
 test('a body beyond the Local Group keeps its dot at the scale of its cluster, and loses it from the Milky Way', () => {
diff --git a/packages/renderer/src/universe/world-context/world-context-planner.ts b/packages/renderer/src/universe/world-context/world-context-planner.ts
index e61681d294c..655cdc102ec 100644
--- a/packages/renderer/src/universe/world-context/world-context-planner.ts
+++ b/packages/renderer/src/universe/world-context/world-context-planner.ts
@@ -1,5 +1,6 @@
-import { createSystemFade, logarithmicFade, BODY_INDICATOR_DIAMETER, CONTEXT_LINE_WIDTH } from './context-scale.js';
+import { createSystemFade, extendedRetirement, logarithmicFade, BODY_INDICATOR_DIAMETER, CONTEXT_LINE_WIDTH } from './context-scale.js';
 import type { PositionM } from '@cssearth/engine';
+import { isExtendedClassification } from '@cssearth/objects';
 import type { PreparedContextOrbit, PreparedContextOrbitGeometry, PreparedWorldContext, PreparedWorldContextGeometry } from '../../prepared-data/world-context.js';
 import type { WorldCameraPose, WorldCameraViewport } from '../../navigation/world-camera.js';
 import { cssViewFromOrientation } from '../../navigation/world-camera-math.js';
@@ -98,17 +99,16 @@ const pathLevels = (orbit: PreparedContextOrbitGeometry) => [{ vertices: orbit.v
 export function createWorldContextPlanner(plan: PreparedWorldContext | PreparedWorldContextGeometry, annotationPriorities: Readonly<Record<string, number>> = {},
   annotationLandmarks: readonly string[] = []) {
   const wantedOrbits = new Set<string>(), landmarkMoonIds = new Set(annotationLandmarks), declutterMarkers = createMarkerDeclutter(annotationPriorities);
-  const points = [plan.focus, ...plan.bodies], byId = new Map(points.map(point => [point.id, point]));
+  const points = [plan.focus, ...plan.bodies].map(body => 'classification' in body && isExtendedClassification(body.classification) ? { ...body, radiusM: 0 } : body), byId = new Map(points.map(point => [point.id, point]));
   const indexById = new Map(points.map((point, index) => [point.id, index] as const).reverse()); // Each id's first slot, looked up per frame.
   let systemFade = createSystemFade(plan);
   const entryOf = (body: (typeof points)[number]) => {
     const orbit: PlannerOrbit | null = 'orbit' in body ? body.orbit ?? null : null;
     const levels = orbit && hasPath(orbit) ? pathLevels(orbit) : [];
-    // A star placed by its own record, not one on an orbit: only such a star can belong to another galaxy's field.
-    const placedStar = orbit === null && 'classification' in body && body.classification === 'star';
+    const placedStar = orbit === null && 'classification' in body && body.classification === 'star'; // Placed by its own record: only such a star can be of another galaxy's field.
     const distanceFromSunM = Math.hypot(...body.positionM.map((value, axis) => value - plan.focus.positionM[axis]!));
     return { body, orbit, levels, parent: orbit ? byId.get(orbit.centerBodyId) ?? null : null, scale: markerScale(distanceFromSunM, placedStar ? plan.volume : undefined),
-      galaxyField: !placedStar || inGalaxyField(distanceFromSunM, plan.volume),
+      galaxyField: !placedStar || inGalaxyField(distanceFromSunM, plan.volume), kind: 'classification' in body ? body.classification : undefined, extended: 'classification' in body && isExtendedClassification(body.classification),
       closedOrbit: orbit?.fullTrail === true, drawnRadiusM: body.radiusM * ('billboard' in body && body.billboard ? Math.max(1, billboardImageScale(body.billboard, body.radiusM)) : 1),
       orbitProjection: createRetainedRingProjection(orbit ? orbit.vertexCount * 2 : 0),
       // A hidden body is the same retired stub every frame: no projection, no allocation, no packet.
@@ -165,7 +165,7 @@ export function createWorldContextPlanner(plan: PreparedWorldContext | PreparedW
       const orbitFocus = (selectionPreview ? bodies[indexById.get(selectionPreview) ?? -1] : undefined) ?? selectedEntry;
       const orbitOverview = selectionPreview ? false : overview;
       const frame = createWorldFrameProjection(plan.focus, orbitFocus.body, toEye, project);
-      const selectedEye = frame.eye(selected);
+      const selectedEye = frame.eye(selected), fromFocus = Math.hypot(...frame.eye(plan.focus));
       // Past a system (bodies hidden, then ten times that), a star that is not featured gives way to the catalogue dots.
       const galaxyHandoff = logarithmicFade(Math.hypot(...selectedEye), plan.system.hiddenDistanceM, plan.system.hiddenDistanceM * 10);
       const selectedDiameter = selectedEye[2] < -selected.radiusM
@@ -264,7 +264,7 @@ export function createWorldContextPlanner(plan: PreparedWorldContext | PreparedW
         const prominentOrbiter = entry.orbit !== null && systemFade.isSystemStar(entry.orbit.centerBodyId) &&
           (annotationPriorities[body.id] ?? 0) >= 3;
         const inFrame = depth > body.radiusM && Math.abs(bodyX) < width / 2 && Math.abs(bodyY) < height / 2;
-        const cover = inFrame ? occlusion.cover(eye, prepared[entry.index]!.drawnRadiusM, body.id) : null, visible = inFrame && cover !== true;
+        const cover = inFrame ? occlusion.cover(eye, prepared[entry.index]!.drawnRadiusM, body.id) : null, visible = inFrame && cover !== true && !(isSelected && entry.extended && !overview); // Up close a selected galaxy's image is its marker: a ring would cover what sits at its centre.
         // Planet circles and captions are orientation landmarks, not physical
         // sprites. Keep them through occultation and pin an off-screen planet to
         // the nearest stage edge; the body sprite itself remains truthful below.
@@ -343,16 +343,13 @@ export function createWorldContextPlanner(plan: PreparedWorldContext | PreparedW
           (annotationPriorities[body.id] ?? 0) >= 3;
         const proxyOpacity = highlighted || hostedPlanet ? 1 : 1 - bodyLod.markerOpacity * (1 - appearance.opacity);
         const flightDestination = navigationInFlight && body.id === emphasizedId;
-        // Past the Local Group scale the galaxies are the objects: a body's dot fades with its distance from the camera over
-        // the band where the overview becomes the Local Group, as its name does below. A star in no system has no other fade,
-        // so without this every star of the Milky Way stayed a dot from intergalactic distances. A body beyond it uses the cluster scale.
-        const beyondLocalGroup = logarithmicFade(Math.hypot(...eye), entry.scale.returnDistanceM, entry.scale.enterDistanceM);
-        // The focus, a featured star, a star outside the Milky Way and a black hole keep their dots; planets fade with their system.
+        // Past the Local Group scale the galaxies are the objects: a body's dot fades with its distance from the camera, as its name
+        // does below (a star in no system has no other fade); a galaxy or a cluster fades at its own scale (extendedRetirement).
+        const beyondLocalGroup = extendedRetirement(entry.kind, fromFocus) ?? logarithmicFade(Math.hypot(...eye), entry.scale.returnDistanceM, entry.scale.enterDistanceM);
         const galaxyHost = body.id !== plan.focus.id && entry.orbit === null && body.classification === 'star' &&
           entry.galaxyField && (annotationPriorities[body.id] ?? 0) < FEATURED_STAR_TIER;
-        // A retired galaxy level takes its own stars with it; a star of another galaxy (a Magellanic Cloud's, or one beyond the
-        // Local Group at the cluster scale) stays for that galaxy's view.
-        const atGalaxyScale = view.galaxyRetired === true && body.id !== plan.focus.id && entry.orbit === null && entry.galaxyField ? 1 : galaxyHost ? galaxyHandoff : 0;
+        // A retired galaxy level takes its own stars and nebulae with it; another galaxy's star, a galaxy and a cluster keep their dots.
+        const atGalaxyScale = view.galaxyRetired === true && body.id !== plan.focus.id && entry.orbit === null && entry.galaxyField && entry.kind !== 'galaxy' && entry.kind !== 'galaxy-cluster' ? 1 : galaxyHost ? galaxyHandoff : 0;
         const markerOpacity = (flightDestination ? bodyLod.proxyOpacity : ownsDetail ? lod.proxyOpacity : 1) *
           (isLocator ? 1 : systemOpacity * (ownsDetail || flightDestination ? 1 : proxyOpacity)) *
           (isSelected || flightDestination ? 1 : (1 - beyondLocalGroup) * (1 - atGalaxyScale));
@@ -361,7 +358,7 @@ export function createWorldContextPlanner(plan: PreparedWorldContext | PreparedW
         // A flight destination keeps its circle until the preview hands off to detail.
         const circle = (flightDestination ? systemOpacity * bodyLod.proxyOpacity > (entry.indicatorShown ? 0 : ANNOTATION_ENTRY_MARGIN) :
           (isLocator || hostedPlanet) && overview || bodyLod.markerOpacity > (entry.indicatorShown ? 0 : ANNOTATION_ENTRY_MARGIN)) &&
-          (!entry.indicatorHidden || hovered || isSelected);
+          (!entry.indicatorHidden || hovered || isSelected) && !(isSelected && entry.extended && !overview);
         const primary = !entry.orbit || systemFade.isSystemStar(entry.orbit.centerBodyId);
         const priority = (isAnchor ? 1000 : isLocator ? 500 : 0) + (primary ? 100 : 0) + body.radiusM / plan.focus.radiusM;
         const projected = (prepared[entry.index]!.projected ??= { entry, x: 0, y: 0, depth: 0, diameter: 0, markerOpacity: 0, circle: false, visible: false,
@@ -437,7 +434,7 @@ export function createWorldContextPlanner(plan: PreparedWorldContext | PreparedW
         // read as neighbourhood: an inner planet is not less part of its system because the camera frames the outer one.
         // Past the Local Group scale the galaxies are named, not the stars inside them: a name fades with the body's distance
         // from the camera over the band where the overview becomes the Local Group (the cluster scale beyond it).
-        const galactic = 1 - logarithmicFade(Math.hypot(...frame.eye(body)), entry.scale.returnDistanceM, entry.scale.enterDistanceM);
+        const galactic = 1 - (extendedRetirement(entry.kind, fromFocus) ?? logarithmicFade(Math.hypot(...frame.eye(body)), entry.scale.returnDistanceM, entry.scale.enterDistanceM));
         const alpha = flightDestination ? 1 : referenceAnnotationOnly ? galactic : targeted ? markerOpacity : Math.min(markerOpacity, galactic, resolvedDisc || hostedPlanet ? 1 : labelExtentOpacity(localExtent));
         // Naming policy, decided before any slot is contested: suppressed, unresolved, too faint
         // or out of context here, and the body is not one this camera names at all.
diff --git a/packages/telescope-cli/README.md b/packages/telescope-cli/README.md
index 44ad7fe1815..57165626626 100644
--- a/packages/telescope-cli/README.md
+++ b/packages/telescope-cli/README.md
@@ -93,7 +93,7 @@ telescope export MEASUREMENT/output.product.json --output body-map --geometry na
 telescope export MAP/map.fits.product.json --output sphere --out SPHERE
 telescope export src/objects/stellar-neighbourhood/object.json --output points --out stars
 telescope export src/objects/milky-way/object.json --output volume --out galaxy
-telescope export src/objects/lmc/object.json --output volume-dataset-bank --out lmc-datasets
+telescope export src/objects/lmc-volume/object.json --output volume-dataset-bank --out lmc-datasets
 ```
 
 The navigation file pins SPICE kernels. The sphere is a standalone HTML file with no JavaScript. See the [navigation contract](../../docs/virtual-telescopes.md#projection-and-sphere). Physical handoffs copy prepared renderer files and credits; restore missing inputs with `setup:prepared --object=ID`.
diff --git a/packages/telescope-cli/src/families/f09-astrometry.mts b/packages/telescope-cli/src/families/f09-astrometry.mts
index 288ba263093..c0d5a52ba29 100644
--- a/packages/telescope-cli/src/families/f09-astrometry.mts
+++ b/packages/telescope-cli/src/families/f09-astrometry.mts
@@ -28,4 +28,4 @@ export function readAstrometryCsv(text:string):AstrometryRow[]{
 }
 export function describeAstrometry(input:AstrometryDescription):ProductDescriptor{const facts=inspectAstrometry(input.rows),epoch=input.epochJulianYear??(input.rows.every(row=>row.epochJulianYear===input.rows[0]!.epochJulianYear)?input.rows[0]!.epochJulianYear:undefined),columns=[{id:'id',name:'id',role:'row-identity',datatype:'string',nullable:false,variableLength:false},{id:'ra',name:'ra_deg',role:'right-ascension',datatype:'float64',unit:'deg',nullable:false,variableLength:false},{id:'dec',name:'dec_deg',role:'declination',datatype:'float64',unit:'deg',nullable:false,variableLength:false},...(facts.hasProperMotion?[{id:'pmra',name:'pm_ra_cosdec_mas_yr',role:'proper-motion-ra-cos-dec',datatype:'float64',unit:'mas/yr',nullable:false,variableLength:false},{id:'pmdec',name:'pm_dec_mas_yr',role:'proper-motion-dec',datatype:'float64',unit:'mas/yr',nullable:false,variableLength:false}] as const:[]),...(facts.hasParallax?[{id:'parallax',name:'parallax_mas',role:'parallax',datatype:'float64',unit:'mas',nullable:true,variableLength:false},{id:'parallax-error',name:'parallax_error_mas',role:'parallax-standard-deviation',datatype:'float64',unit:'mas',nullable:true,variableLength:false}] as const:[]),...(facts.hasPositionErrors?[{id:'ra-error',name:'ra_error_mas',role:'right-ascension-cos-dec-standard-deviation',datatype:'float64',unit:'mas',nullable:true,variableLength:false},{id:'dec-error',name:'dec_error_mas',role:'declination-standard-deviation',datatype:'float64',unit:'mas',nullable:true,variableLength:false}] as const:[]),...(facts.hasRaDecCorrelation?[{id:'ra-dec-correlation',name:'ra_dec_corr',role:'right-ascension-declination-correlation',datatype:'float64',nullable:true,variableLength:false}] as const:[]),...(facts.hasRadialVelocity?[{id:'radial-velocity',name:'radial_velocity_km_s',role:'radial-velocity',datatype:'float64',unit:'km/s',nullable:false,variableLength:false}] as const:[]),...(facts.hasCovariance?[{id:'covariance',name:'covariance',role:'astrometric-covariance',datatype:'float64',nullable:false,variableLength:false,shape:[facts.covarianceLength!]}] as const:[])];return descriptor({schema:'cssearth-telescope-product-descriptor@1',dataset:{id:stable(input.id,'astrometry id'),...(input.target?{target:input.target}:{}),acquisition:{kind:'repository',identity:input.member.path},producingRecord:input.producingRecord,sourceClassifications:[{term:'astrometry',vocabulary:'cssEarth observational families',version:'1',status:'mapped'}],families:['F09'],profiles:[{handlerId:'f09-astrometry',profileId:'icrs-astrometry-table@1'}]},members:[input.member],components:[{id:'astrometry',name:'astrometric positions',families:['F09'],locations:[{memberId:input.member.id}],representation:{kind:'table',rows:input.rows.length},axes:[],columns,quantity:{name:'celestial position',semantics:'Source identities and astrometric quantities in their stated reference frame and epoch.'},calibration:{state:'archive-calibrated',basis:input.calibrationBasis},uncertainty:facts.hasCovariance?{form:'covariance',columnId:'covariance',basis:'Supplied per-row astrometric covariance.'}:{form:'unknown',basis:'Available scalar errors are retained; no complete covariance is supplied.'},flags:[],frame:{kind:'celestial',name:input.frame,referencePosition:'barycentric',...(epoch!==undefined?{epoch:`J${epoch}`}:{})},dependencyIds:[]}],dependencies:[],issues:[...(!facts.hasCovariance?[{scope:'component' as const,identity:'astrometry',state:'missing' as const,reason:'No complete covariance is supplied.'}]:[]),...(epoch===undefined?[{scope:'component' as const,identity:'astrometry',state:'missing' as const,reason:'No common coordinate epoch is supplied; propagation is unavailable.'}]:[]),...(!facts.hasProperMotion?[{scope:'component' as const,identity:'astrometry',state:'missing' as const,reason:'Both proper-motion components are required for propagation.'}]:[])]});}
 const ops=(component:any):FamilyOperation[]=>{const cols=new Set(component.columns.map((c:any)=>c.id)),canPropagate=component.frame?.name?.toUpperCase()==='ICRS'&&component.frame.epoch!==undefined&&cols.has('pmra')&&cols.has('pmdec');return[{id:'astrometry-inspect',label:'Inspect astrometry',owner:'inspectAstrometry',available:true,reason:'Positions, identities, frame and epoch are exposed.'},{id:'astrometry-export',label:'Export astrometry',owner:'exportAstrometryCsv',available:true,reason:'Exports retained astrometric columns.'},{id:'astrometry-select-rows',label:'Select astrometric rows',owner:'selectAstrometryRows',available:true,reason:'Explicit source IDs select retained rows.'},{id:'astrometry-track-data',label:'Prepare sky/track view',owner:'astrometryTrackData',available:true,reason:'ICRS positions and declared uncertainties are available; row order is not promoted to a trajectory.'},{id:'astrometry-track-preview',label:'Render sky-position preview',owner:'previewAstrometryTrack',available:true,reason:'ICRS positions retain row identity in a static scatter preview.'},{id:'astrometry-propagate',label:'Propagate astrometry',owner:'propagateAstrometry',available:canPropagate,reason:canPropagate?'ICRS epoch and both proper-motion components are present.':'Propagation requires ICRS, a source epoch and both proper-motion components.'}].map(op=>({id:op.id,label:op.label,handlerId:'f09-astrometry',componentId:component.id,owner:{module:'packages/telescope-cli/src/families/f09-astrometry.mts',export:op.owner},available:op.available,reason:op.reason,fixedArguments:{},parameters:[...(op.id==='astrometry-propagate'?[{id:'epoch',option:'--epoch',kind:'number-list' as const,required:true,count:2,description:'Explicit source and destination Julian years.'}]:op.id==='astrometry-select-rows'?[{id:'rows',option:'--rows',kind:'input-path' as const,required:true,description:'Exact astrometric source IDs.'}]:[]),{id:'out',option:'--out',kind:'output-directory' as const,required:true,description:'New output directory.'}],limitations:['Propagation is linear tangent-plane proper motion; it does not claim full 6D perspective propagation.','Propagation carries each row\'s covariance unchanged; it does not grow position uncertainty with proper-motion error.'] }));};
-export const F09_ASTROMETRY_HANDLER:FamilyHandler={id:'f09-astrometry',families:['F09'],profiles:[{id:'icrs-astrometry-table@1',format:'ICRS astrometry table',version:'1',families:['F09'],publicBaseline:true,evidence:[{path:'src/objects/m1/source/stellar-field.json',establishes:'Pinned real Gaia DR3 positions, proper motions, parallax/errors, identities, query and epoch.',status:'complete'}]}],recognizes:members=>members.some(m=>/astrometr|stellar-field/iu.test(m.path))?['icrs-astrometry-table@1']:[],operations:d=>d.components.filter(c=>c.families.includes('F09')).flatMap(ops)};
+export const F09_ASTROMETRY_HANDLER:FamilyHandler={id:'f09-astrometry',families:['F09'],profiles:[{id:'icrs-astrometry-table@1',format:'ICRS astrometry table',version:'1',families:['F09'],publicBaseline:true,evidence:[{path:'src/objects/m1-volume/source/stellar-field.json',establishes:'Pinned real Gaia DR3 positions, proper motions, parallax/errors, identities, query and epoch.',status:'complete'}]}],recognizes:members=>members.some(m=>/astrometr|stellar-field/iu.test(m.path))?['icrs-astrometry-table@1']:[],operations:d=>d.components.filter(c=>c.families.includes('F09')).flatMap(ops)};
diff --git a/packages/telescope-cli/src/families/f09-astrometry.test.mts b/packages/telescope-cli/src/families/f09-astrometry.test.mts
index 107a9136842..5ba0fb0bad9 100644
--- a/packages/telescope-cli/src/families/f09-astrometry.test.mts
+++ b/packages/telescope-cli/src/families/f09-astrometry.test.mts
@@ -1,6 +1,6 @@
 import assert from'node:assert/strict';import{test}from'node:test';import{readFile}from'node:fs/promises';import{resolve}from'node:path';import{member}from'./common.mts';import{astrometryTrackData,describeAstrometry,readAstrometryCsv,exportAstrometryCsv,F09_ASTROMETRY_HANDLER,propagateAstrometry,selectAstrometryRows}from'./f09-astrometry.mts';
 import { WORKSPACE } from '@cssearth/telescope/node';
-const root=WORKSPACE,path='src/objects/m1/source/stellar-field.json',bytes=await readFile(resolve(root,path)),source=JSON.parse(bytes.toString()) as any,rows=source.stars.map((star:any)=>({id:star.sourceId,raDeg:star.raDeg,decDeg:star.decDeg,epochJulianYear:source.coordinateEpochJulianYear,pmRaCosDecMasYr:star.pmRaMasYr,pmDecMasYr:star.pmDecMasYr,parallaxMas:star.parallaxMas,parallaxErrorMas:star.parallaxErrorMas}));
+const root=WORKSPACE,path='src/objects/m1-volume/source/stellar-field.json',bytes=await readFile(resolve(root,path)),source=JSON.parse(bytes.toString()) as any,rows=source.stars.map((star:any)=>({id:star.sourceId,raDeg:star.raDeg,decDeg:star.decDeg,epochJulianYear:source.coordinateEpochJulianYear,pmRaCosDecMasYr:star.pmRaMasYr,pmDecMasYr:star.pmDecMasYr,parallaxMas:star.parallaxMas,parallaxErrorMas:star.parallaxErrorMas}));
 test('F09 describes and exports the pinned Gaia field with IDs, frame, epoch and uncertainties',()=>{const product=describeAstrometry({id:'m1-gaia-field',target:'m1',member:member('gaia-field',path,'science',bytes,'application/json'),rows,frame:'ICRS',epochJulianYear:source.coordinateEpochJulianYear,producingRecord:path,calibrationBasis:[source.provenance.catalogue,source.provenance.query]});assert.equal(product.components[0]!.representation.kind,'table');assert.equal(product.components[0]!.frame?.epoch,'J2016');assert.equal(product.issues.some(issue=>/covariance/u.test(issue.reason)),true);assert.match(exportAstrometryCsv(rows.slice(0,1)),new RegExp(rows[0]!.id,'u'));assert.equal(F09_ASTROMETRY_HANDLER.operations(product).find(op=>op.id==='astrometry-propagate')?.available,true);});
 test('F09 propagation is explicit and refuses missing prerequisites',()=>{const one=rows[0]!,moved=propagateAstrometry([one],{fromJulianYear:2016,toJulianYear:2026,frame:'ICRS'})[0]!;assert.notEqual(moved.raDeg,one.raDeg);assert.equal(moved.epochJulianYear,2026);assert.throws(()=>propagateAstrometry([{id:'x',raDeg:1,decDeg:2}],{fromJulianYear:2016,toJulianYear:2026,frame:'ICRS'}),/proper-motion/u);assert.throws(()=>propagateAstrometry([one],{fromJulianYear:2016,toJulianYear:2026,frame:'GALACTIC'}),/ICRS/u);});
 test('F09 row selection and sky view retain identifiers and stated coordinates',()=>{const selected=selectAstrometryRows(rows,[rows[0]!.id]);assert.equal(selected.length,1);assert.equal(astrometryTrackData(selected)[0]!.id,rows[0]!.id);assert.throws(()=>selectAstrometryRows(rows,['missing']),/absent/u);});
diff --git a/packages/telescope-cli/src/families/fixtures/telescope-family-examples/descriptors/F09.json b/packages/telescope-cli/src/families/fixtures/telescope-family-examples/descriptors/F09.json
index 5cb80d227f5..428e18def52 100644
--- a/packages/telescope-cli/src/families/fixtures/telescope-family-examples/descriptors/F09.json
+++ b/packages/telescope-cli/src/families/fixtures/telescope-family-examples/descriptors/F09.json
@@ -5,9 +5,9 @@
     "target": "m1",
     "acquisition": {
       "kind": "repository",
-      "identity": "../../../../../../../src/objects/m1/source/stellar-field.json"
+      "identity": "../../../../../../../src/objects/m1-volume/source/stellar-field.json"
     },
-    "producingRecord": "src/objects/m1/source/stellar-field.json",
+    "producingRecord": "src/objects/m1-volume/source/stellar-field.json",
     "sourceClassifications": [
       {
         "term": "astrometry",
@@ -29,7 +29,7 @@
   "members": [
     {
       "id": "gaia-field",
-      "path": "../../../../../../../src/objects/m1/source/stellar-field.json",
+      "path": "../../../../../../../src/objects/m1-volume/source/stellar-field.json",
       "role": "science",
       "mediaType": "application/json"
     }
diff --git a/packages/telescope-cli/src/families/fixtures/telescope-family-examples/manifest.json b/packages/telescope-cli/src/families/fixtures/telescope-family-examples/manifest.json
index 61e77a48d52..df77e4979f5 100644
--- a/packages/telescope-cli/src/families/fixtures/telescope-family-examples/manifest.json
+++ b/packages/telescope-cli/src/families/fixtures/telescope-family-examples/manifest.json
@@ -195,7 +195,7 @@
         "requiredCases": []
       },
       "source": {
-        "path": "src/objects/m1/source/stellar-field.json",
+        "path": "src/objects/m1-volume/source/stellar-field.json",
         "url": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist"
       },
       "command": "telescope family-run packages/telescope-cli/src/families/fixtures/telescope-family-examples/descriptors/F09.json astrometry-export --out example-output/F09",
diff --git a/packages/telescope-cli/src/family-operation.test.mts b/packages/telescope-cli/src/family-operation.test.mts
index 2b9a4abf1c1..9520d980e67 100644
--- a/packages/telescope-cli/src/family-operation.test.mts
+++ b/packages/telescope-cli/src/family-operation.test.mts
@@ -52,7 +52,7 @@ test('public execution view exposes only allowlisted ids and refuses mismatched
 test('F03, F05 and F09 public writers reopen real pinned JSON members',async()=>{const work=await temporary();try{
   const spectrumSource=resolve(root,'src/objects/mercury/source/spectrum/mascs-global-area-weighted-mean.json'),spectrumBytes=await readFile(spectrumSource),spectrumRaw=JSON.parse(spectrumBytes.toString()),spectrumFile=resolve(work,'spectrum.json');await writeFile(spectrumFile,spectrumBytes);const spectrumSamples=spectrumRaw.wavelengthNanometers.map((wavelength:number,index:number)=>({id:String(index),segment:'visible',wavelength,value:spectrumRaw.reflectanceIOverF[index]})),spectrum=describeStandaloneSpectrum({id:'mercury-mascs',member:member('spectrum','spectrum.json','science',spectrumBytes),samples:spectrumSamples,wavelengthUnit:'nm',valueName:'reflectance',producingRecord:'pinned MASCS',calibrationBasis:[]}),spectrumPath=await save(work,spectrum),spectrumResult=await executeFamilyOperation(spectrumPath,{operationId:'spectrum-export'},resolve(work,'spectrum-out'));assert.match(await readFile(spectrumResult.product,'utf8'),/0,visible,350/u);
   const photoSource=resolve(root,'src/objects/haumea/source/photometry/disc-color.json'),photoBytes=await readFile(photoSource),photoRaw=JSON.parse(photoBytes.toString()),photoFile=resolve(work,'photometry.json');await writeFile(photoFile,photoBytes);const point={id:'geometric-albedo-v',band:photoRaw.geometricAlbedo.band,system:photoRaw.object.system,effectiveWavelength:photoRaw.effectiveWavelengths.nanometres.V,value:photoRaw.geometricAlbedo.value,uncertainty:photoRaw.geometricAlbedo.uncertainty},photo=describePhotometry({id:'haumea',member:member('photo','photometry.json','science',photoBytes),points:[point],wavelengthUnit:'nm',quantity:'geometric albedo',unit:'1',producingRecord:'pinned photometry',calibrationBasis:[]}),photoPath=resolve(work,'photo-descriptor.json');await writeFile(photoPath,JSON.stringify(photo));const photoResult=await executeFamilyOperation(photoPath,{operationId:'photometry-export'},resolve(work,'photo-out'));assert.match(await readFile(photoResult.product,'utf8'),/0\.51,0\.02/u);
-  const starsSource=resolve(root,'src/objects/m1/source/stellar-field.json'),starsBytes=await readFile(starsSource),starsRaw=JSON.parse(starsBytes.toString()),starsFile=resolve(work,'stars.json');await writeFile(starsFile,starsBytes);const rows=starsRaw.stars.map((star:any)=>({id:star.sourceId,raDeg:star.raDeg,decDeg:star.decDeg,epochJulianYear:starsRaw.coordinateEpochJulianYear,pmRaCosDecMasYr:star.pmRaMasYr,pmDecMasYr:star.pmDecMasYr,parallaxMas:star.parallaxMas,parallaxErrorMas:star.parallaxErrorMas})),stars=describeAstrometry({id:'m1',member:member('stars','stars.json','science',starsBytes),rows,frame:'ICRS',epochJulianYear:2016,producingRecord:'pinned Gaia',calibrationBasis:[]}),starsPath=resolve(work,'stars-descriptor.json');await writeFile(starsPath,JSON.stringify(stars));const moved=await executeFamilyOperation(starsPath,{operationId:'astrometry-propagate',epoch:[2016,2026]},resolve(work,'stars-out'));assert.match(await readFile(moved.product,'utf8'),/2026/u);
+  const starsSource=resolve(root,'src/objects/m1-volume/source/stellar-field.json'),starsBytes=await readFile(starsSource),starsRaw=JSON.parse(starsBytes.toString()),starsFile=resolve(work,'stars.json');await writeFile(starsFile,starsBytes);const rows=starsRaw.stars.map((star:any)=>({id:star.sourceId,raDeg:star.raDeg,decDeg:star.decDeg,epochJulianYear:starsRaw.coordinateEpochJulianYear,pmRaCosDecMasYr:star.pmRaMasYr,pmDecMasYr:star.pmDecMasYr,parallaxMas:star.parallaxMas,parallaxErrorMas:star.parallaxErrorMas})),stars=describeAstrometry({id:'m1',member:member('stars','stars.json','science',starsBytes),rows,frame:'ICRS',epochJulianYear:2016,producingRecord:'pinned Gaia',calibrationBasis:[]}),starsPath=resolve(work,'stars-descriptor.json');await writeFile(starsPath,JSON.stringify(stars));const moved=await executeFamilyOperation(starsPath,{operationId:'astrometry-propagate',epoch:[2016,2026]},resolve(work,'stars-out'));assert.match(await readFile(moved.product,'utf8'),/2026/u);
 }finally{await rm(work,{recursive:true,force:true});}});
 
 test('F06 explicit selection and F18 whole closure write reusable pinned products',async()=>{const work=await temporary();try{
@@ -72,7 +72,7 @@ test('remaining family baseline operations execute through the public dispatcher
   const series=JSON.parse(await readFile((await run('F06',{operationId:'time-series-plot-data'},'series')).product,'utf8'));assert.ok(series.length>1000);
   const spectrum=JSON.parse(await readFile((await run('F07',{operationId:'dynamic-spectrum-spectrum',timeIndex:0},'dynamic-spectrum')).product,'utf8'));assert.equal(spectrum.frequencyHz.length,256);const time=JSON.parse(await readFile((await run('F07',{operationId:'dynamic-spectrum-time-series',frequencyIndex:0},'dynamic-time')).product,'utf8'));assert.equal(time.epochsTt2000.length,1856);
   const scatter=JSON.parse(await readFile((await run('F08',{operationId:'table-scatter-data',columns:['TIME','PDCSAP_FLUX']},'scatter')).product,'utf8'));assert.ok(scatter.length>1000);const histogram=JSON.parse(await readFile((await run('F08',{operationId:'table-histogram',histogram:{column:'PDCSAP_FLUX',edges:[0,10000,20000,30000]}},'histogram')).product,'utf8'));assert.equal(histogram.counts.length,3);
-  const stars=JSON.parse(await readFile(resolve(root,'src/objects/m1/source/stellar-field.json'),'utf8')),id=String(stars.stars[0].sourceId),selected=await readFile((await run('F09',{operationId:'astrometry-select-rows',rows:[id]},'selected-star')).product,'utf8');assert.match(selected,new RegExp(id,'u'));const track=JSON.parse(await readFile((await run('F09',{operationId:'astrometry-track-data'},'track')).product,'utf8'));assert.ok(track.length>100);
+  const stars=JSON.parse(await readFile(resolve(root,'src/objects/m1-volume/source/stellar-field.json'),'utf8')),id=String(stars.stars[0].sourceId),selected=await readFile((await run('F09',{operationId:'astrometry-select-rows',rows:[id]},'selected-star')).product,'utf8');assert.match(selected,new RegExp(id,'u'));const track=JSON.parse(await readFile((await run('F09',{operationId:'astrometry-track-data'},'track')).product,'utf8'));assert.ok(track.length>100);
   const subset=await readFile((await run('F12',{operationId:'oifits-subset',subset:{OI_VIS2:[0],OI_T3:[0]}},'oifits-subset')).product);assert.equal(subset.subarray(0,6).toString(),'SIMPLE');
   const radar=JSON.parse(await readFile((await run('F15',{operationId:'radar-coordinate-view'},'radar-coordinates')).product,'utf8'));assert.deepEqual(radar.shape,[127,64]);const spatial=JSON.parse(await readFile((await run('F16',{operationId:'spatial-select-components',components:['points']},'spatial-components')).product,'utf8'));assert.equal(spatial[0].id,'points');
   const calibration=JSON.parse(await readFile((await run('F17',{operationId:'near-msi-inspect'},'near-msi')).product,'utf8'));assert.equal(calibration.unit,'I/F');assert.ok(calibration.acceptedPixels>100000);const bundle=await run('F17',{operationId:'export-bundle'},'near-msi-bundle'),bundleRecord=await readProductRecord(bundle.record);assert.equal(bundleRecord?.outputs.length,4);
diff --git a/packages/telescope-cli/src/new-object/m31-cepheids.mts b/packages/telescope-cli/src/new-object/m31-cepheids.mts
index 8c84a6a46db..fccea39a9b8 100644
--- a/packages/telescope-cli/src/new-object/m31-cepheids.mts
+++ b/packages/telescope-cli/src/new-object/m31-cepheids.mts
@@ -42,7 +42,7 @@ export interface GalaxyCepheid { readonly name: string; readonly target: string;
 const LVDB = { credit: 'the Local Volume Database v1.1.1 (Pace 2025)', url: 'https://doi.org/10.33232/001c.144859' };
 /** The disc the app draws `galaxy` on, from its package's recipe: the same construction its layers and catalogue dots use. */
 export async function galaxyDisc(root: string, galaxy: CepheidGalaxy) {
-  const recipe = JSON.parse(await readFile(resolve(root, 'src/objects', galaxy.objectId, 'source/recipe.json'), 'utf8')) as Parameters<typeof imageLayerDisc>[0];
+  const recipe = JSON.parse(await readFile(resolve(root, 'src/objects', `${galaxy.objectId}-layers`, 'source/recipe.json'), 'utf8')) as Parameters<typeof imageLayerDisc>[0];
   return { disc: imageLayerDisc(recipe), recipe };
 }
 /** A star of a galaxy is placed in the galaxy as it is drawn: where its sight line crosses the disc's midplane, as the galaxy's
@@ -52,7 +52,7 @@ export async function galaxyDisc(root: string, galaxy: CepheidGalaxy) {
 export function discPlacement(galaxy: CepheidGalaxy, placed: Awaited<ReturnType<typeof galaxyDisc>>, raDeg: number, decDeg: number, measured: string) {
   const parsecs = Math.round(imageLayerDiscDistanceKpc(placed.disc, raDeg, decDeg) * 1000), { target, geometry } = placed.recipe;
   return { value: parsecs, url: LVDB.url,
-    source: `Placed in ${galaxy.name} as the app draws it, where the star's sight line crosses the disc's midplane: ${parsecs.toLocaleString('en-US')} pc (src/objects/${galaxy.objectId}/source/recipe.json: centre ${Math.round(target.distancePc).toLocaleString('en-US')} pc from ${LVDB.credit}, inclination ${geometry.inclinationDeg} deg, line of nodes ${geometry.lineOfNodesPaDeg} deg). ${measured}` };
+    source: `Placed in ${galaxy.name} as the app draws it, where the star's sight line crosses the disc's midplane: ${parsecs.toLocaleString('en-US')} pc (src/objects/${galaxy.objectId}-layers/source/recipe.json: centre ${Math.round(target.distancePc).toLocaleString('en-US')} pc from ${LVDB.credit}, inclination ${geometry.inclinationDeg} deg, line of nodes ${geometry.lineOfNodesPaDeg} deg). ${measured}` };
 }
 
 /** One Cepheid's draft in `galaxy`: `name` as a reader meets it, `found` the sentence of who measured it. */
diff --git a/packages/telescope-cli/src/sky/sky-band-composite.test.mts b/packages/telescope-cli/src/sky/sky-band-composite.test.mts
index 2a5d80a78eb..56506f712ad 100644
--- a/packages/telescope-cli/src/sky/sky-band-composite.test.mts
+++ b/packages/telescope-cli/src/sky/sky-band-composite.test.mts
@@ -96,8 +96,8 @@ test('WISE bands mosaic pinned atlas tiles through a pinned tile list', async ()
       tiles: tiles.map((bytes, i) => ({ coaddId: `056${4 + i}p242_ac51`, bytes: bytes.length })) }));
     for (const [i, bytes] of tiles.entries()) await writeFile(join(cache, 'wise-atlas', `056${4 + i}p242_ac51-w4-int-3.fits.gz`), bytes);
     const composite = parseSkyBandComposite({ schema: 'cssearth-sky-band-composite@1', grid, backgroundPercentile: 5, peakPercentile: 100,
-      bands: [{ band: 'W4', tiles: { path: 'src/objects/m45/source/wise-atlas/w4.json' } }], display: { minimum: 0, stretch: 1, softening: 8 } });
-    const listPath = 'src/objects/m45/source/wise-atlas/w4.json';
+      bands: [{ band: 'W4', tiles: { path: 'src/objects/m45-volume/source/wise-atlas/w4.json' } }], display: { minimum: 0, stretch: 1, softening: 8 } });
+    const listPath = 'src/objects/m45-volume/source/wise-atlas/w4.json';
     const result = await composeSkyBands(composite, { input: async path => { assert.equal(path, listPath); return pinsList; }, cache });
     const acquisition = result.evidence.bands[0]!.acquisition as { kind: string; backgroundMatching: { medianOverlapStepDnBefore: number; medianOverlapStepDnAfter: number } };
     assert.equal(acquisition.kind, 'wise-atlas');
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rename to public/navigation/focus-helix-volume-eso-vista@2x.webp
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diff --git a/public/navigation/focus-m45-noirlab-optical@2x.webp b/public/navigation/focus-m45-volume-noirlab-optical@2x.webp
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diff --git a/public/navigation/search/omega-centauri@2x.webp b/public/navigation/search/omega-centauri@2x.webp
new file mode 100644
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diff --git a/public/navigation/search/smc@2x.webp b/public/navigation/search/smc@2x.webp
new file mode 100644
index 00000000000..e044376e17a
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diff --git a/public/navigation/search/virgo-cluster@2x.webp b/public/navigation/search/virgo-cluster@2x.webp
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diff --git a/public/navigation/sidebar-thumbnails.json b/public/navigation/sidebar-thumbnails.json
index 23cfcb0603d..3c07d3aa979 100644
--- a/public/navigation/sidebar-thumbnails.json
+++ b/public/navigation/sidebar-thumbnails.json
@@ -55,183 +55,191 @@
       "bytes": 4052
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-      "path": "src/objects/helix/prepared/presentation.json",
-      "bytes": 4697
+      "path": "src/objects/helix-volume/prepared/presentation.json",
+      "bytes": 3733
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-      "path": "public/scenes/helix/datasets/eso-vista.webp",
+      "path": "public/scenes/helix-volume/datasets/eso-vista.webp",
       "bytes": 39332
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     {
-      "path": "public/scenes/helix/datasets/eso-wfi.webp",
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       "bytes": 9410
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-      "path": "public/scenes/helix/datasets/eso-wide.webp",
+      "path": "public/scenes/helix-volume/datasets/eso-wide.webp",
       "bytes": 8158
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     {
-      "path": "src/objects/lmc/prepared/presentation.json",
-      "bytes": 4804
+      "path": "src/objects/lmc-volume/prepared/presentation.json",
+      "bytes": 3840
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-      "path": "public/scenes/lmc/datasets/horalek-widefield.webp",
+      "path": "public/scenes/lmc-volume/datasets/horalek-widefield.webp",
       "bytes": 17694
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     {
-      "path": "public/scenes/lmc/datasets/vista-infrared.webp",
+      "path": "public/scenes/lmc-volume/datasets/vista-infrared.webp",
       "bytes": 26292
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     {
-      "path": "public/scenes/lmc/datasets/wise-wide-infrared.webp",
+      "path": "public/scenes/lmc-volume/datasets/wise-wide-infrared.webp",
       "bytes": 2868
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-      "path": "src/objects/m1/prepared/presentation.json",
-      "bytes": 10248
+      "path": "src/objects/m1-volume/prepared/presentation.json",
+      "bytes": 8333
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-      "path": "public/scenes/m1/datasets/hubble-optical.webp",
+      "path": "public/scenes/m1-volume/datasets/hubble-optical.webp",
       "bytes": 33070
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-      "path": "public/scenes/m1/datasets/webb-infrared.webp",
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       "bytes": 24098
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-      "path": "public/scenes/m1/datasets/webb-components.webp",
+      "path": "public/scenes/m1-volume/datasets/webb-components.webp",
       "bytes": 23986
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-      "path": "public/scenes/m1/datasets/spitzer-infrared.webp",
+      "path": "public/scenes/m1-volume/datasets/spitzer-infrared.webp",
       "bytes": 3424
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-      "path": "public/scenes/m1/datasets/vla-radio.webp",
+      "path": "public/scenes/m1-volume/datasets/vla-radio.webp",
       "bytes": 5446
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     {
-      "path": "public/scenes/m1/datasets/chandra-xray.webp",
+      "path": "public/scenes/m1-volume/datasets/chandra-xray.webp",
       "bytes": 4464
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     {
-      "path": "src/objects/m2-9/prepared/presentation.json",
-      "bytes": 1842
+      "path": "src/objects/m2-9-volume/prepared/presentation.json",
+      "bytes": 1512
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+      "path": "public/scenes/m2-9-volume/datasets/hst-optical.webp",
       "bytes": 14756
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-      "path": "src/objects/m31/prepared/presentation.json",
-      "bytes": 1760
+      "path": "src/objects/m31-layers/prepared/presentation.json",
+      "bytes": 1376
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-      "path": "public/scenes/m31/datasets/optical.webp",
+      "path": "public/scenes/m31-layers/datasets/optical.webp",
       "bytes": 3062
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-      "path": "src/objects/m33/prepared/presentation.json",
-      "bytes": 1688
+      "path": "src/objects/m33-layers/prepared/presentation.json",
+      "bytes": 1709
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+      "path": "public/scenes/m33-layers/datasets/optical.webp",
       "bytes": 15530
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-      "path": "src/objects/m42/prepared/presentation.json",
-      "bytes": 3234
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-      "path": "public/scenes/m42/datasets/eso-optical.webp",
+      "path": "public/scenes/m42-volume/datasets/eso-optical.webp",
       "bytes": 10124
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-      "path": "public/scenes/m42/datasets/eso-vista.webp",
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+      "path": "public/scenes/m45-volume/datasets/optical-composite.webp",
       "bytes": 14636
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       "bytes": 11712
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       "bytes": 14772
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       "bytes": 13854
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       "bytes": 51638
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-      "path": "public/scenes/m8/datasets/spitzer-mid-infrared.webp",
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       "bytes": 36602
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-      "path": "src/objects/m81/prepared/presentation.json",
-      "bytes": 1549
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+      "bytes": 1165
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+      "path": "public/scenes/m81-layers/datasets/optical.webp",
       "bytes": 5842
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-      "path": "src/objects/m83/prepared/presentation.json",
-      "bytes": 1426
+      "path": "src/objects/m83-layers/prepared/presentation.json",
+      "bytes": 1042
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-      "path": "public/scenes/m83/datasets/optical.webp",
+      "path": "public/scenes/m83-layers/datasets/optical.webp",
       "bytes": 14088
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     {
-      "path": "src/objects/ngc-253/prepared/presentation.json",
-      "bytes": 1528
+      "path": "src/objects/m87-volume/prepared/presentation.json",
+      "bytes": 1013
+    },
+    {
+      "path": "public/scenes/m87-volume/datasets/eso-optical.webp",
+      "bytes": 33532
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     {
-      "path": "public/scenes/ngc-253/datasets/optical.webp",
+      "path": "src/objects/ngc-253-layers/prepared/presentation.json",
+      "bytes": 1549
+    },
+    {
+      "path": "public/scenes/ngc-253-layers/datasets/optical.webp",
       "bytes": 5324
     },
     {
-      "path": "src/objects/ngc-300/prepared/presentation.json",
-      "bytes": 1403
+      "path": "src/objects/ngc-300-layers/prepared/presentation.json",
+      "bytes": 1424
     },
     {
-      "path": "public/scenes/ngc-300/datasets/optical.webp",
+      "path": "public/scenes/ngc-300-layers/datasets/optical.webp",
       "bytes": 15188
     },
     {
-      "path": "src/objects/omega-centauri/prepared/presentation.json",
-      "bytes": 3983
+      "path": "src/objects/omega-centauri-volume/prepared/presentation.json",
+      "bytes": 3228
     },
     {
-      "path": "public/scenes/omega-centauri/datasets/eso1119b.webp",
+      "path": "public/scenes/omega-centauri-volume/datasets/eso1119b.webp",
       "bytes": 54638
     },
     {
-      "path": "public/scenes/omega-centauri/datasets/eso0844a.webp",
+      "path": "public/scenes/omega-centauri-volume/datasets/eso0844a.webp",
       "bytes": 74642
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     {
@@ -243,27 +251,27 @@
       "bytes": 5604
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-      "path": "src/objects/smc/prepared/presentation.json",
-      "bytes": 7624
+      "path": "src/objects/smc-volume/prepared/presentation.json",
+      "bytes": 6026
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     {
-      "path": "public/scenes/smc/datasets/smc-horalek-wide.webp",
+      "path": "public/scenes/smc-volume/datasets/smc-horalek-wide.webp",
       "bytes": 19112
     },
     {
-      "path": "public/scenes/smc/datasets/smc-vista.webp",
+      "path": "public/scenes/smc-volume/datasets/smc-vista.webp",
       "bytes": 23910
     },
     {
-      "path": "public/scenes/smc/datasets/smc-smash.webp",
+      "path": "public/scenes/smc-volume/datasets/smc-smash.webp",
       "bytes": 31424
     },
     {
-      "path": "public/scenes/smc/datasets/smc-dss2.webp",
+      "path": "public/scenes/smc-volume/datasets/smc-dss2.webp",
       "bytes": 27364
     },
     {
-      "path": "public/scenes/smc/datasets/smc-allwise-wide.webp",
+      "path": "public/scenes/smc-volume/datasets/smc-allwise-wide.webp",
       "bytes": 3552
     },
     {
@@ -292,7 +300,7 @@
     },
     {
       "path": "src/objects/local-group/prepared/catalogue.json",
-      "bytes": 702193
+      "bytes": 703991
     }
   ],
   "images": {
@@ -377,281 +385,290 @@
       "credit": "NASA/ESA/CSA JWST, MAST",
       "sourceUrl": "https://www.stsci.edu/jwst/phase2-public/2780.pdf"
     },
-    "helix/eso-vista": {
-      "url2x": "/navigation/focus-helix-eso-vista@2x.webp",
+    "helix-volume/eso-vista": {
+      "url2x": "/navigation/focus-helix-volume-eso-vista@2x.webp",
       "inputs": [
-        "src/objects/helix/prepared/presentation.json",
-        "public/scenes/helix/datasets/eso-vista.webp"
+        "src/objects/helix-volume/prepared/presentation.json",
+        "public/scenes/helix-volume/datasets/eso-vista.webp"
       ],
       "credit": "ESO/VISTA/J. Emerson. Acknowledgment: Cambridge Astronomical Survey Unit",
       "sourceUrl": "https://www.eso.org/public/images/eso1205a/"
     },
-    "helix/eso-wfi": {
-      "url2x": "/navigation/focus-helix-eso-wfi@2x.webp",
+    "helix-volume/eso-wfi": {
+      "url2x": "/navigation/focus-helix-volume-eso-wfi@2x.webp",
       "inputs": [
-        "src/objects/helix/prepared/presentation.json",
-        "public/scenes/helix/datasets/eso-wfi.webp"
+        "src/objects/helix-volume/prepared/presentation.json",
+        "public/scenes/helix-volume/datasets/eso-wfi.webp"
       ],
       "credit": "ESO",
       "sourceUrl": "https://www.eso.org/public/images/eso0907a/"
     },
-    "helix/eso-wide": {
-      "url2x": "/navigation/focus-helix-eso-wide@2x.webp",
+    "helix-volume/eso-wide": {
+      "url2x": "/navigation/focus-helix-volume-eso-wide@2x.webp",
       "inputs": [
-        "src/objects/helix/prepared/presentation.json",
-        "public/scenes/helix/datasets/eso-wide.webp"
+        "src/objects/helix-volume/prepared/presentation.json",
+        "public/scenes/helix-volume/datasets/eso-wide.webp"
       ],
       "credit": "ESO",
       "sourceUrl": "https://www.eso.org/public/images/helix/"
     },
-    "lmc/horalek-widefield": {
-      "url2x": "/navigation/focus-lmc-horalek-widefield@2x.webp",
+    "lmc-volume/horalek-widefield": {
+      "url2x": "/navigation/focus-lmc-volume-horalek-widefield@2x.webp",
       "inputs": [
-        "src/objects/lmc/prepared/presentation.json",
-        "public/scenes/lmc/datasets/horalek-widefield.webp"
+        "src/objects/lmc-volume/prepared/presentation.json",
+        "public/scenes/lmc-volume/datasets/horalek-widefield.webp"
       ],
       "credit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
       "sourceUrl": "https://noirlab.edu/public/images/iotw2547a/"
     },
-    "lmc/vista-infrared": {
-      "url2x": "/navigation/focus-lmc-vista-infrared@2x.webp",
+    "lmc-volume/vista-infrared": {
+      "url2x": "/navigation/focus-lmc-volume-vista-infrared@2x.webp",
       "inputs": [
-        "src/objects/lmc/prepared/presentation.json",
-        "public/scenes/lmc/datasets/vista-infrared.webp"
+        "src/objects/lmc-volume/prepared/presentation.json",
+        "public/scenes/lmc-volume/datasets/vista-infrared.webp"
       ],
       "credit": "ESO/VMC Survey",
       "sourceUrl": "https://www.eso.org/public/images/eso1914a/"
     },
-    "lmc/wise-wide-infrared": {
-      "url2x": "/navigation/focus-lmc-wise-wide-infrared@2x.webp",
+    "lmc-volume/wise-wide-infrared": {
+      "url2x": "/navigation/focus-lmc-volume-wise-wide-infrared@2x.webp",
       "inputs": [
-        "src/objects/lmc/prepared/presentation.json",
-        "public/scenes/lmc/datasets/wise-wide-infrared.webp"
+        "src/objects/lmc-volume/prepared/presentation.json",
+        "public/scenes/lmc-volume/datasets/wise-wide-infrared.webp"
       ],
       "credit": "IPAC/NASA; color HiPS by CDS (CNRS/Unistra)",
       "sourceUrl": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html"
     },
-    "m1/hubble-optical": {
-      "url2x": "/navigation/focus-m1-hubble-optical@2x.webp",
+    "m1-volume/hubble-optical": {
+      "url2x": "/navigation/focus-m1-volume-hubble-optical@2x.webp",
       "inputs": [
-        "src/objects/m1/prepared/presentation.json",
-        "public/scenes/m1/datasets/hubble-optical.webp"
+        "src/objects/m1-volume/prepared/presentation.json",
+        "public/scenes/m1-volume/datasets/hubble-optical.webp"
       ],
       "credit": "NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble)",
       "sourceUrl": "https://esahubble.org/images/heic0515a/"
     },
-    "m1/webb-infrared": {
-      "url2x": "/navigation/focus-m1-webb-infrared@2x.webp",
+    "m1-volume/webb-infrared": {
+      "url2x": "/navigation/focus-m1-volume-webb-infrared@2x.webp",
       "inputs": [
-        "src/objects/m1/prepared/presentation.json",
-        "public/scenes/m1/datasets/webb-infrared.webp"
+        "src/objects/m1-volume/prepared/presentation.json",
+        "public/scenes/m1-volume/datasets/webb-infrared.webp"
       ],
       "credit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
       "sourceUrl": "https://esawebb.org/images/weic2326a/"
     },
-    "m1/webb-components": {
-      "url2x": "/navigation/focus-m1-webb-components@2x.webp",
+    "m1-volume/webb-components": {
+      "url2x": "/navigation/focus-m1-volume-webb-components@2x.webp",
       "inputs": [
-        "src/objects/m1/prepared/presentation.json",
-        "public/scenes/m1/datasets/webb-components.webp"
+        "src/objects/m1-volume/prepared/presentation.json",
+        "public/scenes/m1-volume/datasets/webb-components.webp"
       ],
       "credit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
       "sourceUrl": "https://esawebb.org/images/weic2417a/"
     },
-    "m1/spitzer-infrared": {
-      "url2x": "/navigation/focus-m1-spitzer-infrared@2x.webp",
+    "m1-volume/spitzer-infrared": {
+      "url2x": "/navigation/focus-m1-volume-spitzer-infrared@2x.webp",
       "inputs": [
-        "src/objects/m1/prepared/presentation.json",
-        "public/scenes/m1/datasets/spitzer-infrared.webp"
+        "src/objects/m1-volume/prepared/presentation.json",
+        "public/scenes/m1-volume/datasets/spitzer-infrared.webp"
       ],
       "credit": "JPL/Caltech",
       "sourceUrl": "https://esahubble.org/images/potw1720c/"
     },
-    "m1/vla-radio": {
-      "url2x": "/navigation/focus-m1-vla-radio@2x.webp",
+    "m1-volume/vla-radio": {
+      "url2x": "/navigation/focus-m1-volume-vla-radio@2x.webp",
       "inputs": [
-        "src/objects/m1/prepared/presentation.json",
-        "public/scenes/m1/datasets/vla-radio.webp"
+        "src/objects/m1-volume/prepared/presentation.json",
+        "public/scenes/m1-volume/datasets/vla-radio.webp"
       ],
       "credit": "NRAO/AUI/NSF",
       "sourceUrl": "https://esahubble.org/images/potw1720b/"
     },
-    "m1/chandra-xray": {
-      "url2x": "/navigation/focus-m1-chandra-xray@2x.webp",
+    "m1-volume/chandra-xray": {
+      "url2x": "/navigation/focus-m1-volume-chandra-xray@2x.webp",
       "inputs": [
-        "src/objects/m1/prepared/presentation.json",
-        "public/scenes/m1/datasets/chandra-xray.webp"
+        "src/objects/m1-volume/prepared/presentation.json",
+        "public/scenes/m1-volume/datasets/chandra-xray.webp"
       ],
       "credit": "CXC",
       "sourceUrl": "https://esahubble.org/images/potw1720f/"
     },
-    "m2-9/hst-optical": {
-      "url2x": "/navigation/focus-m2-9-hst-optical@2x.webp",
+    "m2-9-volume/hst-optical": {
+      "url2x": "/navigation/focus-m2-9-volume-hst-optical@2x.webp",
       "inputs": [
-        "src/objects/m2-9/prepared/presentation.json",
-        "public/scenes/m2-9/datasets/hst-optical.webp"
+        "src/objects/m2-9-volume/prepared/presentation.json",
+        "public/scenes/m2-9-volume/datasets/hst-optical.webp"
       ],
       "credit": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
       "sourceUrl": "https://apod.nasa.gov/apod/ap040201.html"
     },
-    "m31/optical": {
-      "url2x": "/navigation/focus-m31-optical@2x.webp",
+    "m31-layers/optical": {
+      "url2x": "/navigation/focus-m31-layers-optical@2x.webp",
       "inputs": [
-        "src/objects/m31/prepared/presentation.json",
-        "public/scenes/m31/datasets/optical.webp"
+        "src/objects/m31-layers/prepared/presentation.json",
+        "public/scenes/m31-layers/datasets/optical.webp"
       ],
       "credit": "NOIRLab · ESA/Hubble",
       "sourceUrl": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/"
     },
-    "m33/optical": {
-      "url2x": "/navigation/focus-m33-optical@2x.webp",
+    "m33-layers/optical": {
+      "url2x": "/navigation/focus-m33-layers-optical@2x.webp",
       "inputs": [
-        "src/objects/m33/prepared/presentation.json",
-        "public/scenes/m33/datasets/optical.webp"
+        "src/objects/m33-layers/prepared/presentation.json",
+        "public/scenes/m33-layers/datasets/optical.webp"
       ],
       "credit": "ESO",
       "sourceUrl": "https://www.eso.org/public/images/eso1424a/"
     },
-    "m42/eso-optical": {
-      "url2x": "/navigation/focus-m42-eso-optical@2x.webp",
+    "m42-volume/eso-optical": {
+      "url2x": "/navigation/focus-m42-volume-eso-optical@2x.webp",
       "inputs": [
-        "src/objects/m42/prepared/presentation.json",
-        "public/scenes/m42/datasets/eso-optical.webp"
+        "src/objects/m42-volume/prepared/presentation.json",
+        "public/scenes/m42-volume/datasets/eso-optical.webp"
       ],
       "credit": "ESO/G. Beccari",
       "sourceUrl": "https://www.eso.org/public/images/eso1723a/"
     },
-    "m42/eso-vista": {
-      "url2x": "/navigation/focus-m42-eso-vista@2x.webp",
+    "m42-volume/eso-vista": {
+      "url2x": "/navigation/focus-m42-volume-eso-vista@2x.webp",
       "inputs": [
-        "src/objects/m42/prepared/presentation.json",
-        "public/scenes/m42/datasets/eso-vista.webp"
+        "src/objects/m42-volume/prepared/presentation.json",
+        "public/scenes/m42-volume/datasets/eso-vista.webp"
       ],
       "credit": "ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit",
       "sourceUrl": "https://www.eso.org/public/images/eso1006a/"
     },
-    "m45/optical-composite": {
-      "url2x": "/navigation/focus-m45-optical-composite@2x.webp",
+    "m45-volume/optical-composite": {
+      "url2x": "/navigation/focus-m45-volume-optical-composite@2x.webp",
       "inputs": [
-        "src/objects/m45/prepared/presentation.json",
-        "public/scenes/m45/datasets/optical-composite.webp"
+        "src/objects/m45-volume/prepared/presentation.json",
+        "public/scenes/m45-volume/datasets/optical-composite.webp"
       ],
       "credit": "Taavi Niittee / Tõrva Astronomy Club",
       "sourceUrl": "https://commons.wikimedia.org/wiki/File:Plejades.jpg"
     },
-    "m45/noirlab-optical": {
-      "url2x": "/navigation/focus-m45-noirlab-optical@2x.webp",
+    "m45-volume/noirlab-optical": {
+      "url2x": "/navigation/focus-m45-volume-noirlab-optical@2x.webp",
       "inputs": [
-        "src/objects/m45/prepared/presentation.json",
-        "public/scenes/m45/datasets/noirlab-optical.webp"
+        "src/objects/m45-volume/prepared/presentation.json",
+        "public/scenes/m45-volume/datasets/noirlab-optical.webp"
       ],
       "credit": "NOIRLab/NSF/AURA/T.A. Rector (University of Alaska Anchorage), R. Cool (University of Arizona) and WIYN",
       "sourceUrl": "https://noirlab.edu/public/images/noao-m45/"
     },
-    "m45/spitzer-irac": {
-      "url2x": "/navigation/focus-m45-spitzer-irac@2x.webp",
+    "m45-volume/spitzer-irac": {
+      "url2x": "/navigation/focus-m45-volume-spitzer-irac@2x.webp",
       "inputs": [
-        "src/objects/m45/prepared/presentation.json",
-        "public/scenes/m45/datasets/spitzer-irac.webp"
+        "src/objects/m45-volume/prepared/presentation.json",
+        "public/scenes/m45-volume/datasets/spitzer-irac.webp"
       ],
       "credit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
       "sourceUrl": "https://science.nasa.gov/photojournal/pink-pleiades/"
     },
-    "m45/spitzer-irac-mips": {
-      "url2x": "/navigation/focus-m45-spitzer-irac-mips@2x.webp",
+    "m45-volume/spitzer-irac-mips": {
+      "url2x": "/navigation/focus-m45-volume-spitzer-irac-mips@2x.webp",
       "inputs": [
-        "src/objects/m45/prepared/presentation.json",
-        "public/scenes/m45/datasets/spitzer-irac-mips.webp"
+        "src/objects/m45-volume/prepared/presentation.json",
+        "public/scenes/m45-volume/datasets/spitzer-irac-mips.webp"
       ],
       "credit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
       "sourceUrl": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/"
     },
-    "m45/wise-four-band": {
-      "url2x": "/navigation/focus-m45-wise-four-band@2x.webp",
+    "m45-volume/wise-four-band": {
+      "url2x": "/navigation/focus-m45-volume-wise-four-band@2x.webp",
       "inputs": [
-        "src/objects/m45/prepared/presentation.json",
-        "public/scenes/m45/datasets/wise-four-band.webp"
+        "src/objects/m45-volume/prepared/presentation.json",
+        "public/scenes/m45-volume/datasets/wise-four-band.webp"
       ],
       "credit": "NASA/JPL-Caltech/UCLA",
       "sourceUrl": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/"
     },
-    "m8/eso-optical": {
-      "url2x": "/navigation/focus-m8-eso-optical@2x.webp",
+    "m8-volume/eso-optical": {
+      "url2x": "/navigation/focus-m8-volume-eso-optical@2x.webp",
       "inputs": [
-        "src/objects/m8/prepared/presentation.json",
-        "public/scenes/m8/datasets/eso-optical.webp"
+        "src/objects/m8-volume/prepared/presentation.json",
+        "public/scenes/m8-volume/datasets/eso-optical.webp"
       ],
       "credit": "ESO",
       "sourceUrl": "https://www.eso.org/public/images/eso0936a/"
     },
-    "m8/eso-vista": {
-      "url2x": "/navigation/focus-m8-eso-vista@2x.webp",
+    "m8-volume/eso-vista": {
+      "url2x": "/navigation/focus-m8-volume-eso-vista@2x.webp",
       "inputs": [
-        "src/objects/m8/prepared/presentation.json",
-        "public/scenes/m8/datasets/eso-vista.webp"
+        "src/objects/m8-volume/prepared/presentation.json",
+        "public/scenes/m8-volume/datasets/eso-vista.webp"
       ],
       "credit": "ESO/VVV. Acknowledgment: Cambridge Astronomical Survey Unit",
       "sourceUrl": "https://www.eso.org/public/images/eso1101d/"
     },
-    "m8/spitzer-mid-infrared": {
-      "url2x": "/navigation/focus-m8-spitzer-mid-infrared@2x.webp",
+    "m8-volume/spitzer-mid-infrared": {
+      "url2x": "/navigation/focus-m8-volume-spitzer-mid-infrared@2x.webp",
       "inputs": [
-        "src/objects/m8/prepared/presentation.json",
-        "public/scenes/m8/datasets/spitzer-mid-infrared.webp"
+        "src/objects/m8-volume/prepared/presentation.json",
+        "public/scenes/m8-volume/datasets/spitzer-mid-infrared.webp"
       ],
       "credit": "NASA/JPL-Caltech; CDS",
       "sourceUrl": "https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/"
     },
-    "m81/optical": {
-      "url2x": "/navigation/focus-m81-optical@2x.webp",
+    "m81-layers/optical": {
+      "url2x": "/navigation/focus-m81-layers-optical@2x.webp",
       "inputs": [
-        "src/objects/m81/prepared/presentation.json",
-        "public/scenes/m81/datasets/optical.webp"
+        "src/objects/m81-layers/prepared/presentation.json",
+        "public/scenes/m81-layers/datasets/optical.webp"
       ],
       "credit": "NOIRLab",
       "sourceUrl": "https://noirlab.edu/public/images/noao-m81m82/"
     },
-    "m83/optical": {
-      "url2x": "/navigation/focus-m83-optical@2x.webp",
+    "m83-layers/optical": {
+      "url2x": "/navigation/focus-m83-layers-optical@2x.webp",
       "inputs": [
-        "src/objects/m83/prepared/presentation.json",
-        "public/scenes/m83/datasets/optical.webp"
+        "src/objects/m83-layers/prepared/presentation.json",
+        "public/scenes/m83-layers/datasets/optical.webp"
       ],
       "credit": "ESO/IDA/Danish 1.5 m/R. Gendler, S. Guisard and C. Thöne",
       "sourceUrl": "https://www.eso.org/public/images/m83/"
     },
-    "ngc-253/optical": {
-      "url2x": "/navigation/focus-ngc-253-optical@2x.webp",
+    "m87-volume/eso-optical": {
+      "url2x": "/navigation/focus-m87-volume-eso-optical@2x.webp",
+      "inputs": [
+        "src/objects/m87-volume/prepared/presentation.json",
+        "public/scenes/m87-volume/datasets/eso-optical.webp"
+      ],
+      "credit": "Chris Mihos/ESO",
+      "sourceUrl": "https://www.eso.org/public/images/eso1525a/"
+    },
+    "ngc-253-layers/optical": {
+      "url2x": "/navigation/focus-ngc-253-layers-optical@2x.webp",
       "inputs": [
-        "src/objects/ngc-253/prepared/presentation.json",
-        "public/scenes/ngc-253/datasets/optical.webp"
+        "src/objects/ngc-253-layers/prepared/presentation.json",
+        "public/scenes/ngc-253-layers/datasets/optical.webp"
       ],
       "credit": "ESO",
       "sourceUrl": "https://www.eso.org/public/images/eso0902c/"
     },
-    "ngc-300/optical": {
-      "url2x": "/navigation/focus-ngc-300-optical@2x.webp",
+    "ngc-300-layers/optical": {
+      "url2x": "/navigation/focus-ngc-300-layers-optical@2x.webp",
       "inputs": [
-        "src/objects/ngc-300/prepared/presentation.json",
-        "public/scenes/ngc-300/datasets/optical.webp"
+        "src/objects/ngc-300-layers/prepared/presentation.json",
+        "public/scenes/ngc-300-layers/datasets/optical.webp"
       ],
       "credit": "ESO",
       "sourceUrl": "https://www.eso.org/public/images/eso1037a/"
     },
-    "omega-centauri/eso1119b": {
-      "url2x": "/navigation/focus-omega-centauri-eso1119b@2x.webp",
+    "omega-centauri-volume/eso1119b": {
+      "url2x": "/navigation/focus-omega-centauri-volume-eso1119b@2x.webp",
       "inputs": [
-        "src/objects/omega-centauri/prepared/presentation.json",
-        "public/scenes/omega-centauri/datasets/eso1119b.webp"
+        "src/objects/omega-centauri-volume/prepared/presentation.json",
+        "public/scenes/omega-centauri-volume/datasets/eso1119b.webp"
       ],
       "credit": "ESO/INAF-VST/OmegaCAM. Acknowledgement: A. Grado, L. Limatola/INAF-Capodimonte Observatory",
       "sourceUrl": "https://www.eso.org/public/images/eso1119b/"
     },
-    "omega-centauri/eso0844a": {
-      "url2x": "/navigation/focus-omega-centauri-eso0844a@2x.webp",
+    "omega-centauri-volume/eso0844a": {
+      "url2x": "/navigation/focus-omega-centauri-volume-eso0844a@2x.webp",
       "inputs": [
-        "src/objects/omega-centauri/prepared/presentation.json",
-        "public/scenes/omega-centauri/datasets/eso0844a.webp"
+        "src/objects/omega-centauri-volume/prepared/presentation.json",
+        "public/scenes/omega-centauri-volume/datasets/eso0844a.webp"
       ],
       "credit": "ESO",
       "sourceUrl": "https://www.eso.org/public/images/eso0844a/"
@@ -665,47 +682,47 @@
       "credit": "ALMA (ESO/NAOJ/NRAO)",
       "sourceUrl": "https://almascience.eso.org/aq/?projectCode=2018.A.00030.S"
     },
-    "smc/smc-horalek-wide": {
-      "url2x": "/navigation/focus-smc-smc-horalek-wide@2x.webp",
+    "smc-volume/smc-horalek-wide": {
+      "url2x": "/navigation/focus-smc-volume-smc-horalek-wide@2x.webp",
       "inputs": [
-        "src/objects/smc/prepared/presentation.json",
-        "public/scenes/smc/datasets/smc-horalek-wide.webp"
+        "src/objects/smc-volume/prepared/presentation.json",
+        "public/scenes/smc-volume/datasets/smc-horalek-wide.webp"
       ],
       "credit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
       "sourceUrl": "https://noirlab.edu/public/images/iotw2615a/"
     },
-    "smc/smc-vista": {
-      "url2x": "/navigation/focus-smc-smc-vista@2x.webp",
+    "smc-volume/smc-vista": {
+      "url2x": "/navigation/focus-smc-volume-smc-vista@2x.webp",
       "inputs": [
-        "src/objects/smc/prepared/presentation.json",
-        "public/scenes/smc/datasets/smc-vista.webp"
+        "src/objects/smc-volume/prepared/presentation.json",
+        "public/scenes/smc-volume/datasets/smc-vista.webp"
       ],
       "credit": "ESO/VISTA VMC",
       "sourceUrl": "https://www.eso.org/public/images/eso1714a/"
     },
-    "smc/smc-smash": {
-      "url2x": "/navigation/focus-smc-smc-smash@2x.webp",
+    "smc-volume/smc-smash": {
+      "url2x": "/navigation/focus-smc-volume-smc-smash@2x.webp",
       "inputs": [
-        "src/objects/smc/prepared/presentation.json",
-        "public/scenes/smc/datasets/smc-smash.webp"
+        "src/objects/smc-volume/prepared/presentation.json",
+        "public/scenes/smc-volume/datasets/smc-smash.webp"
       ],
       "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University); image processing Travis Rector (University of Alaska Anchorage), Mahdi Zamani and Davide de Martin",
       "sourceUrl": "https://noirlab.edu/public/images/noirlab2030b/"
     },
-    "smc/smc-dss2": {
-      "url2x": "/navigation/focus-smc-smc-dss2@2x.webp",
+    "smc-volume/smc-dss2": {
+      "url2x": "/navigation/focus-smc-volume-smc-dss2@2x.webp",
       "inputs": [
-        "src/objects/smc/prepared/presentation.json",
-        "public/scenes/smc/datasets/smc-dss2.webp"
+        "src/objects/smc-volume/prepared/presentation.json",
+        "public/scenes/smc-volume/datasets/smc-dss2.webp"
       ],
       "credit": "ESA/Hubble and Digitized Sky Survey 2; acknowledgement Davide De Martin (ESA/Hubble)",
       "sourceUrl": "https://esahubble.org/images/heic0514c/"
     },
-    "smc/smc-allwise-wide": {
-      "url2x": "/navigation/focus-smc-smc-allwise-wide@2x.webp",
+    "smc-volume/smc-allwise-wide": {
+      "url2x": "/navigation/focus-smc-volume-smc-allwise-wide@2x.webp",
       "inputs": [
-        "src/objects/smc/prepared/presentation.json",
-        "public/scenes/smc/datasets/smc-allwise-wide.webp"
+        "src/objects/smc-volume/prepared/presentation.json",
+        "public/scenes/smc-volume/datasets/smc-allwise-wide.webp"
       ],
       "credit": "IPAC/NASA; colour HiPS CDS (CNRS/Unistra)",
       "sourceUrl": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json"
@@ -736,22 +753,23 @@
     "betelgeuse-shell": "betelgeuse-shell/zimpol-v",
     "eps-eridani-disc": "eps-eridani-disc/dust",
     "hd-181327-disc": "hd-181327-disc/reflectance",
-    "helix": "helix/eso-wfi",
-    "lmc": "lmc/horalek-widefield",
-    "m1": "m1/hubble-optical",
-    "m2-9": "m2-9/hst-optical",
-    "m31": "m31/optical",
-    "m33": "m33/optical",
-    "m42": "m42/eso-optical",
-    "m45": "m45/optical-composite",
-    "m8": "m8/eso-optical",
-    "m81": "m81/optical",
-    "m83": "m83/optical",
-    "ngc-253": "ngc-253/optical",
-    "ngc-300": "ngc-300/optical",
-    "omega-centauri": "omega-centauri/eso1119b",
+    "helix-volume": "helix-volume/eso-wfi",
+    "lmc-volume": "lmc-volume/horalek-widefield",
+    "m1-volume": "m1-volume/hubble-optical",
+    "m2-9-volume": "m2-9-volume/hst-optical",
+    "m31-layers": "m31-layers/optical",
+    "m33-layers": "m33-layers/optical",
+    "m42-volume": "m42-volume/eso-optical",
+    "m45-volume": "m45-volume/optical-composite",
+    "m8-volume": "m8-volume/eso-optical",
+    "m81-layers": "m81-layers/optical",
+    "m83-layers": "m83-layers/optical",
+    "m87-volume": "m87-volume/eso-optical",
+    "ngc-253-layers": "ngc-253-layers/optical",
+    "ngc-300-layers": "ngc-300-layers/optical",
+    "omega-centauri-volume": "omega-centauri-volume/eso1119b",
     "pds-70-disc": "pds-70-disc/dust",
-    "smc": "smc/smc-horalek-wide",
+    "smc-volume": "smc-volume/smc-horalek-wide",
     "sun-cor1-density": "sun-cor1-density/electron-density",
     "milky-way": "milky-way/volume"
   }
diff --git a/public/navigation/smc-context.webp b/public/navigation/smc-context.webp
new file mode 100644
index 00000000000..7cadaf96ec5
Binary files /dev/null and b/public/navigation/smc-context.webp differ
diff --git a/public/navigation/virgo-cluster-context.webp b/public/navigation/virgo-cluster-context.webp
new file mode 100644
index 00000000000..fb6dfb21d40
Binary files /dev/null and b/public/navigation/virgo-cluster-context.webp differ
diff --git a/site/application-world-context.mts b/site/application-world-context.mts
index a0996f0dc84..78f468e55c1 100644
--- a/site/application-world-context.mts
+++ b/site/application-world-context.mts
@@ -8,7 +8,6 @@ import type { PreparedWorldCameraFrame } from '@cssearth/renderer/navigation/wor
 import { PREPARED_WORLD_PRESENTATION } from './prepared-world-presentation.mts';
 import { APPLICATION_WORLD_CONTEXT as applicationContext, streamWorldSystems } from './world-context-plan.mts';
 import { DIAGNOSTICS_ENABLED } from './diagnostics-policy.mts';
-import { createPreparedContextNavigation } from './prepared-context-navigation.mts';
 import { CONTEXT_AVAILABILITY } from './context-availability.mts';
 import { suppressMinorMoonOrbitPaint } from './moon-orbit-policy.mts';
 import { mountCatalogueMoonLabels } from './catalogue-moon-labels.mts';
@@ -23,7 +22,7 @@ import type { ApplicationWorldLayer } from './application-world-types.mts';
 
 export function createApplicationWorldContext() {
   return {
-    async mount({ stage, viewport, signal, onSelectFocus, windowTarget = stage.ownerDocument.defaultView }: { stage: HTMLElement; viewport: ReturnType<typeof createCameraViewport>; signal?: AbortSignal; onSelectFocus(id: string): void; windowTarget?: Window | null }) {
+    async mount({ stage, viewport, signal, windowTarget = stage.ownerDocument.defaultView }: { stage: HTMLElement; viewport: ReturnType<typeof createCameraViewport>; signal?: AbortSignal; windowTarget?: Window | null }) {
       const target = stage.ownerDocument.defaultView;
       if (!target || !windowTarget) throw new Error('World context requires a window.');
       const lifetime = createSceneLifetime();
@@ -49,15 +48,11 @@ export function createApplicationWorldContext() {
         const presentationHost = stage.closest<HTMLElement>('.object-world-stage') ?? stage;
         const layer = own(prepared.mount(stage, { presentationHost,
           requestPublication: () => refreshWorld(),
-          onSelectGalaxy: object => { if (!lifetime.disposed) onSelectFocus(object.id); },
         }));
         const occlusion = labelOcclusionFor(stage.ownerDocument);
         const updateOcclusion = () => { if (!lifetime.disposed) layer.setLabelBlockers(occlusion.read()); };
         updateOcclusion();
         lifetime.onDispose(occlusion.subscribe(updateOcclusion));
-        const contextNavigation = own(createPreparedContextNavigation({ layer, presentation: PREPARED_WORLD_PRESENTATION.galaxies,
-          unavailableObjectIds: Object.entries(CONTEXT_AVAILABILITY).filter(([, state]) => !state.available).map(([id]) => id),
-          sources: prepared.catalogSources, windowTarget }));
         lifetime.onDispose(suppressMinorMoonOrbitPaint(presentationHost, worldVisibilityPolicy.minorMoonIds));
         const planner = own(prepared.createFramePlanner());
         // The systems this page does not show arrive after its first view (startup-gate.ts), in a few batches; each joins
@@ -95,8 +90,6 @@ export function createApplicationWorldContext() {
           present: frames.present,
           createFramePresenter: frames.createFramePresenter,
           setNavigationInFlight: frames.setNavigationInFlight,
-          connectNavigation: contextNavigation.connect,
-          applyFocus: contextNavigation.apply,
           previewSelection(id?: string | null, framingScale?: number, edge?: PreparedLabelEdge) {
             if (!lifetime.disposed) layer.previewSelection(id, framingScale, edge);
           },
diff --git a/site/application-world-resources.mts b/site/application-world-resources.mts
index 9d6a350ce09..e31779a3717 100644
--- a/site/application-world-resources.mts
+++ b/site/application-world-resources.mts
@@ -12,7 +12,7 @@ import { CONTEXT_OBJECT_ASSET_URLS, CONTEXT_OBJECT_DESCRIPTORS } from './prepare
 import { CONTEXT_AVAILABILITY } from './context-availability.mts';
 import { PREPARED_WORLD_PRESENTATION } from './prepared-world-presentation.mts';
 import { createInFlightLoader } from './in-flight-loader.mts';
-import { loadFocusCatalogs } from './focus-catalog.mts';
+import { loadDotCatalogues } from './dot-catalogues.mts';
 import { worldVisibilityPolicy } from './application-world-visibility.mts';
 import { STELLAR_EXTENTS } from './stellar-extents.mts';
 import { readPageDatasets, selectedPageDataset } from './page-datasets.mts';
@@ -35,22 +35,21 @@ const ASTEROID_MINIMUM_PIXELS = 2, PLAIN_DOT_MINIMUM_PIXELS = 1.5;
 const { annotationOpacities, annotationPriorities, asteroidIds, ordinaryAsteroidIds, plainDotIds, compact: phone } = worldVisibilityPolicy;
 const ASTRONOMICAL_UNIT_M = 149_597_870_700, PARSEC_M = 3.085677581491367e16;
 
-// Published catalogues drawn through a volume bank, with its opacity (src/objects/m87/README.md).
+// Published catalogues drawn through a volume bank, with its opacity (src/objects/m87-volume/README.md).
 const VOLUME_CATALOGUE_POINTS: Readonly<Record<string, readonly string[]>> = {
-  m87: ['dots'],
+  'm87-volume': ['dots'],
 };
 
 // Inventory of prepared resources, not navigation entries or runtime generators.
 type ApplicationUniverse = ReturnType<typeof createPreparedUniverse> & {
   loadShells(): Promise<{ payload: Awaited<ReturnType<typeof loadPreparedCssSurfaceShell>>; resolveResource(path: string): string }[]>;
-  catalogSources(): Awaited<ReturnType<typeof loadFocusCatalogs>>['galaxies']['sources'];
 };
 let universePromise: Promise<ApplicationUniverse> | null = null;
 export function loadApplicationUniverse(): Promise<ApplicationUniverse> {
   universePromise ??= (async () => {
-    let catalogs: Awaited<ReturnType<typeof loadFocusCatalogs>> | null = null;
-    let catalogsLoading: Promise<Awaited<ReturnType<typeof loadFocusCatalogs>>> | null = null;
-    const loadCatalogs = () => catalogs ? Promise.resolve(catalogs) : catalogsLoading ??= loadFocusCatalogs(location.origin)
+    let catalogs: Awaited<ReturnType<typeof loadDotCatalogues>> | null = null;
+    let catalogsLoading: Promise<Awaited<ReturnType<typeof loadDotCatalogues>>> | null = null;
+    const loadCatalogs = () => catalogs ? Promise.resolve(catalogs) : catalogsLoading ??= loadDotCatalogues(location.origin)
       .then(value => catalogs = value).finally(() => { catalogsLoading = null; });
     // Only the context objects' folders are globbed; bodies share src/objects but are not world resources.
     const descriptors = CONTEXT_OBJECT_DESCRIPTORS, assets = CONTEXT_OBJECT_ASSET_URLS;
@@ -187,7 +186,6 @@ export function loadApplicationUniverse(): Promise<ApplicationUniverse> {
         firstPlanner = null;
         return planner;
       },
-      catalogSources: () => catalogs ? [...catalogs.galaxies.sources, ...catalogs.clusters.sources, ...catalogs.nebulae.sources] : [],
     };
   })().catch(error => { universePromise = null; throw error; });
   return universePromise;
diff --git a/site/application-world-visibility.mts b/site/application-world-visibility.mts
index 9da1399b98f..a146156148d 100644
--- a/site/application-world-visibility.mts
+++ b/site/application-world-visibility.mts
@@ -76,7 +76,7 @@ export const worldVisibilityPolicy = {
 };
 
 /** Visibility of retained world bodies, labels and highlights. */
-export function createApplicationWorldVisibility(layer: Pick<ApplicationWorldLayer, 'setBodyVisibility' | 'setHighlightedClassification'>, lifetime: SceneLifetime) {
+export function createApplicationWorldVisibility(layer: Pick<ApplicationWorldLayer, 'setBodyVisibility'>, lifetime: SceneLifetime) {
   let illustrations = false;
   let highlighted: string | null = null;
   let selectedCometId: string | null = null;
@@ -122,7 +122,6 @@ export function createApplicationWorldVisibility(layer: Pick<ApplicationWorldLay
     setHighlightedClassification(classification: string | null) {
       if (lifetime.disposed || highlighted === classification) return;
       highlighted = classification;
-      layer.setHighlightedClassification(classification);
       update();
     },
   };
diff --git a/site/build/object-package-contract.mts b/site/build/object-package-contract.mts
index a7cd3ca7b87..4721c973e1c 100644
--- a/site/build/object-package-contract.mts
+++ b/site/build/object-package-contract.mts
@@ -65,7 +65,9 @@ export async function validateObjectData(
     readJson(paths.sourceManifest),
   ]);
   const inventory = requireInventory(planet.id, runtimeInput);
-  const sourceManifest = validateSourceManifest(planet.id, sourceInput);
+  // An object whose recipe declares no surface prepares nothing from input files: its manifest may list none.
+  const authored = await authoredObject(planet.id, projectRoot);
+  const sourceManifest = validateSourceManifest(planet.id, sourceInput, { inputs: authored && !authored.recipe.surfaces.length ? 'optional' : 'required' });
   await verifyInventory({ objectId: planet.id, inventory, publicRoot: paths.publicAssets, locations: ['public'] });
   await verifySourceManifest({
     manifest: sourceManifest,
diff --git a/site/build/prepare/companion-context.mts b/site/build/prepare/companion-context.mts
new file mode 100644
index 00000000000..6388207a19c
--- /dev/null
+++ b/site/build/prepare/companion-context.mts
@@ -0,0 +1,19 @@
+// Entry: node site/build/prepare/companion-context.mts <object id>. An object with no surface has no picture of its own: its
+// list marker is drawn from the bank its default dataset shows. This writes that picture as the object's marker source,
+// `source/presentation/context.png`, which its source manifest records with this generator.
+import { readFile } from 'node:fs/promises';
+import { resolve } from 'node:path';
+import sharp from 'sharp';
+import { companionThumbnails } from './surfaceless-scene.ts';
+
+const root = resolve(import.meta.dirname, '../../..'), [id] = process.argv.slice(2);
+if (!id || !/^[a-z][a-z0-9-]*$/u.test(id)) throw new TypeError('Usage: companion-context.mts <object id>');
+const objectDirectory = resolve(root, 'src/objects', id), presentation = resolve(objectDirectory, 'source/presentation');
+const content = JSON.parse(await readFile(resolve(objectDirectory, 'source/content/object.json'), 'utf8')) as { datasets: { defaultDataset: string; controls: { id: string; thumbnail?: string; volume?: unknown }[] } };
+const shown = content.datasets.controls.find(control => control.id === content.datasets.defaultDataset);
+if (!shown?.volume) throw new TypeError(`src/objects/${id}/source/content/object.json: the default dataset shows no companion bank to picture.`);
+// The companion's picture, as the dataset thumbnail draws it, saved as PNG beside the other presentation sources.
+await companionThumbnails({ objectDirectory, publicDirectory: presentation, content: { datasets: { controls: [{ ...shown, thumbnail: 'context.webp' }] } } });
+await sharp(resolve(presentation, 'context.webp')).png().toFile(resolve(presentation, 'context.png'));
+await (await import('node:fs/promises')).rm(resolve(presentation, 'context.webp'));
+console.log(`src/objects/${id}/source/presentation/context.png`);
diff --git a/site/build/prepare/prepare-authored.ts b/site/build/prepare/prepare-authored.ts
index edcadb5cf07..71a43a3c515 100644
--- a/site/build/prepare/prepare-authored.ts
+++ b/site/build/prepare/prepare-authored.ts
@@ -79,9 +79,11 @@ export async function prepareAuthoredObject({ objectDirectory, publicDirectory,
   const result = await prepareAuthoredStages({ objectDirectory, publicDirectory, outputDirectory, write, replaceReviewedImages, reuseImages, acceptChanged });
   if (write || !result.definition) return result;
   const { prepareSurfaceMinimaps } = await import('@cssearth/bake/surface-previews');
-  // Minimaps render from the raw imagery; a reuse-images stage already carries the published ones.
-  if (!reuseImages) await prepareSurfaceMinimaps({ objectDirectory, publicDirectory, outputDirectory, solarGeometry: await solarGeometry() });
-  if (!reuseImages) await assertMapsStartAtSurfaceMapEdge(objectDirectory, outputDirectory);
+  // Minimaps render from the raw imagery; a reuse-images stage already carries the published ones. An object with no
+  // surface has no map to draw.
+  const surfaced = result.descriptor.recipe.surfaces.length > 0;
+  if (!reuseImages && surfaced) await prepareSurfaceMinimaps({ objectDirectory, publicDirectory, outputDirectory, solarGeometry: await solarGeometry() });
+  if (!reuseImages && surfaced) await assertMapsStartAtSurfaceMapEdge(objectDirectory, outputDirectory);
   const prepared = await prepareWorldNavigationDefinition({ objectDirectory, definition: result.definition as Record<string, unknown> });
   await assertDefaultViewsFaceDatasets(objectDirectory, prepared.definition as Record<string, unknown>, prepared.frame);
   const scene = await writeWorldNavigationArtifacts(outputDirectory, prepared, result.scene as Record<string, unknown> | undefined);
@@ -278,6 +280,19 @@ async function prepareAuthoredStages({ objectDirectory, publicDirectory, outputD
   const genericLaneOnly = () => { if (descriptor.recipe.features) throw new TypeError('Surface features are prepared by the generic authored lane only.'); };
   await mkdir(outputDirectory, { recursive: true });
   const sourceDirectory = resolve(objectDirectory, 'source');
+  if (!descriptor.recipe.surfaces.length) {
+    // No surface to bake: the scene is the camera, sky and world frame, and its datasets show companion banks.
+    const { prepareSurfacelessScene, companionThumbnails } = await import('./surfaceless-scene.ts');
+    // Each dataset's thumbnail is a picture of the bank it shows, published as the object's own file.
+    await companionThumbnails({ objectDirectory, publicDirectory, content: required(sources, 'content').value });
+    const content = await prepareObjectContentAssets({ sourceDirectory, publicDirectory, outputDirectory, config: { contentPath: relative(sourceDirectory, required(sources, 'content').path) } });
+    const prepared = await prepareSurfacelessScene({ source: physicalSolarSource(required(sources, 'solar-system').value), controls: content.controls as never, solarGeometry: await solarGeometry() as never });
+    await writeFile(resolve(outputDirectory, 'runtime.json'), `${JSON.stringify(prepared.definition)}\n`);
+    await prepareRuntimeManifest({ id: descriptor.id, publicRoot: publicDirectory, objectDirectory: write ? objectDirectory : outputDirectory,
+      preparedDirectory: outputDirectory, values: [prepared.definition, content] });
+    if (write) await writePreparedObject(descriptor.id, prepared.definition as unknown as Record<string, unknown>);
+    return Object.freeze({ descriptor, sources, definition: prepared.definition, scene: prepared.scene }) as never;
+  }
   if ((source(sources, 'geometry')?.value as Record<string, unknown> | undefined)?.schema === 'cssearth-layered-oblate-preparation@2') {
     genericLaneOnly();
     const { prepareLayeredOblateObject } = await import('@cssearth/bake/objects/layers/material-composition');
diff --git a/site/build/prepare/prepare-catalog.mts b/site/build/prepare/prepare-catalog.mts
index e90543272ab..e2fdba3104c 100644
--- a/site/build/prepare/prepare-catalog.mts
+++ b/site/build/prepare/prepare-catalog.mts
@@ -4,7 +4,7 @@ import { pathToFileURL } from 'node:url';
 import { defineObjects, type CatalogEntry } from '@cssearth/objects';
 import { PREPARED_CATALOGUE, preparedCatalogueModule, readCatalog, readContextObjects, readObjectDescriptors, readOverviews } from '@cssearth/objects/node';
 import { hasErrorCode, isRecord } from '@cssearth/core';
-import { prepareSceneDistance, readPreparedFocusObjects } from '@cssearth/bake/navigation';
+import { prepareSceneDistance } from '@cssearth/bake/navigation';
 
 import { prepareObjectDiscovery } from './prepare-object-discovery.mts';
 import { BODIES, M_PER_PC } from '@cssearth/astronomy';
@@ -53,7 +53,7 @@ export async function contextObjectAssetUrls(contexts: readonly { id: string }[]
   return Object.fromEntries(entries.sort(([left], [right]) => left.localeCompare(right, 'en')));
 }
 
-/** The frame of every volume a body shows through one of its datasets, so an opening camera can fit it. */
+/** The frame of every bank a body shows through one of its datasets, when the bank declares one, so an opening camera can fit it. */
 async function readDatasetVolumes(entries: readonly CatalogEntry[], projectRoot: string) {
   const volumes: Record<string, unknown> = {};
   for (const { id } of entries) {
@@ -65,10 +65,9 @@ async function readDatasetVolumes(entries: readonly CatalogEntry[], projectRoot:
       const volumeId = isRecord(control) && isRecord(control.volume) ? control.volume.objectId : undefined;
       if (typeof volumeId !== 'string' || volumes[volumeId]) continue;
       const descriptor: unknown = JSON.parse(await readFile(resolve(projectRoot, 'src/objects', volumeId, 'object.json'), 'utf8'));
-      if (!isRecord(descriptor) || !isRecord(descriptor.properties) || !isRecord(descriptor.properties.frame)) {
-        throw new TypeError(`src/objects/${volumeId}/object.json: the volume ${id} shows has no properties.frame.`);
-      }
-      volumes[volumeId] = descriptor.properties.frame;
+      if (!isRecord(descriptor) || !isRecord(descriptor.properties)) throw new TypeError(`src/objects/${volumeId}/object.json: the bank ${id} shows has no properties.`);
+      // A bank of catalogue dots declares no frame: its object's own radius frames it.
+      if (isRecord(descriptor.properties.frame)) volumes[volumeId] = descriptor.properties.frame;
     }
   }
   return volumes;
@@ -107,10 +106,11 @@ async function readLocalGroupGalaxies(projectRoot: string) {
     if (detail.focusRadiusM === undefined || members && !members.has(detail.id)) continue;
     if (typeof detail.focusRadiusM !== 'number' || !(detail.focusRadiusM > 0)) throw new TypeError(`${recipePath}: detailObjects.${row}.focusRadiusM is ${String(detail.focusRadiusM)}, not a positive number.`);
     const descriptor: unknown = JSON.parse(await readFile(resolve(projectRoot, 'src/objects', detail.id, 'object.json'), 'utf8'));
-    if (!isRecord(descriptor) || !isRecord(descriptor.properties) || !isRecord(descriptor.properties.frame)) {
-      throw new TypeError(`src/objects/${detail.id}/object.json: the Local Group galaxy ${row} has no properties.frame.`);
+    // A galaxy is an object of the world: its world frame places it.
+    if (!isRecord(descriptor) || !isRecord(descriptor.properties) || !isRecord(descriptor.properties.worldFrame)) {
+      throw new TypeError(`src/objects/${detail.id}/object.json: the Local Group galaxy ${row} has no properties.worldFrame.`);
     }
-    const originM = descriptor.properties.frame.originM;
+    const originM = descriptor.properties.worldFrame.originM;
     if (within !== undefined && Array.isArray(originM) && Math.hypot(...originM.map(Number)) > within * M_PER_PC) continue;
     galaxies[detail.id] = { originM, radiusM: detail.focusRadiusM };
   }
@@ -150,13 +150,13 @@ async function readStellarExtents(entries: readonly { id: string }[], projectRoo
 export async function prepareCatalog({ projectRoot = root } = {}) {
   // Every descriptor once, shared by each read below.
   const descriptors = await readObjectDescriptors(resolve(projectRoot, 'src/objects'));
-  const entries = await readCatalog(resolve(projectRoot, 'src/objects'), prepareSceneDistance, descriptors);
-  const host = entries.find(entry => entry.classification === 'star' && entry.distance.meters === 0);
-  if (!host) throw new TypeError('Prepared focus destinations need a shared world host.');
-  const focuses = await readPreparedFocusObjects(resolve(projectRoot, 'src/objects'), host.id);
-  // The levels above the star systems are drawn by the same shared world host as every catalogue focus.
-  const overviews = await readOverviews(resolve(projectRoot, 'src/objects'), host.id, descriptors);
-  defineObjects<{ id: string; route: string }>([...entries, ...focuses, ...overviews]);
+  const catalogued = await readCatalog(resolve(projectRoot, 'src/objects'), prepareSceneDistance, descriptors);
+  // A level of the zoom ladder is a package's entry like any other; one that is placed too (the Local Group) is in both reads.
+  const overviews = await readOverviews(resolve(projectRoot, 'src/objects'), descriptors);
+  const levelIds = new Set(overviews.map(overview => overview.id));
+  const entries = catalogued.filter(entry => !levelIds.has(entry.id));
+  // The spatial catalogues are data: they name no destination. Every page is a package's own entry.
+  defineObjects<{ id: string; route: string }>([...entries, ...overviews.map(({ id }) => ({ id, route: `/${id}/` }))]);
   const discoveries = await Promise.all(entries.map(async ({ id }) => {
     return prepareObjectDiscovery(descriptors.get(id), resolve(projectRoot, 'src/objects', id));
   }));
@@ -168,9 +168,21 @@ export async function prepareCatalog({ projectRoot = root } = {}) {
     if (entry.classification !== 'star' || discovery.imagery) continue;
     if ([...withImagery].some(child => parents[child]?.parent === entry.id)) discovery.hostsImagery = true;
   }
-  await writeGenerated(resolve(projectRoot, PREPARED_CATALOGUE.entries),
-    preparedCatalogueModule(entries.map(({ id, distance }, index) => ({ descriptor: descriptors.get(id), distance, discovery: discoveries[index]! })), focuses));
-  await writeGenerated(resolve(projectRoot, PREPARED_CATALOGUE.overviews), JSON.stringify(overviews) + '\n');
+  // One row shape for every object: its descriptor, its distance and its discovery.
+  await writeGenerated(resolve(projectRoot, PREPARED_CATALOGUE.entries), preparedCatalogueModule(entries.map(({ id, distance }, index) => {
+    const descriptor = descriptors.get(id);
+    return { descriptor, distance, discovery: discoveries[index]! };
+  })));
+  // Every page reads the levels, so their rows are apart and carry only what an entry reads of a descriptor.
+  await writeGenerated(resolve(projectRoot, PREPARED_CATALOGUE.overviews), JSON.stringify(overviews.map(({ id, descriptor }) => {
+    const { schema, type, properties } = descriptor as { schema: unknown; type: unknown; properties: Record<string, unknown> };
+    const placed = catalogued.find(entry => entry.id === id), volume = properties.volume;
+    return { descriptor: { schema, id, type, properties: { overview: properties.overview,
+      ...(properties.catalog === undefined ? {} : { catalog: properties.catalog, worldFrame: properties.worldFrame }),
+      ...(isRecord(volume) && volume.originM !== undefined ? { volume: { originM: volume.originM } } : {}) } },
+      // A placed level is a landmark of the scale above it, without imagery of its own.
+      ...(placed ? { distance: placed.distance, discovery: { featured: true, imagery: false, illustration: false } } : {}) };
+  })) + '\n');
   await writeGenerated(resolve(projectRoot, 'site/prepared-dataset-volumes.json'), JSON.stringify(await readDatasetVolumes(entries, projectRoot)) + '\n');
   await writeGenerated(resolve(projectRoot, 'site/prepared-local-group-galaxies.json'), JSON.stringify(await readLocalGroupGalaxies(projectRoot)) + '\n');
   const contexts = await readContextObjects(resolve(projectRoot, 'src/objects'), descriptors);
diff --git a/site/build/prepare/prepare-facilities.mts b/site/build/prepare/prepare-facilities.mts
index d6e6c2753e9..d929a31c8b3 100644
--- a/site/build/prepare/prepare-facilities.mts
+++ b/site/build/prepare/prepare-facilities.mts
@@ -33,7 +33,7 @@ export const explorationCompilerClosure = [
   'site/build/prepare/prepare-facilities.mts', 'packages/bake/src/sources/spatial-source-citations.ts', 'packages/catalog/src/spatial.ts', 'packages/catalog/src/spatial-relations.ts', 'packages/catalog/src/clusters.ts', 'packages/objects/src/provenance/exploration-catalog.ts', 'packages/objects/src/provenance/exploration-contributions.ts',
   'packages/objects/src/provenance/prepared-exploration.ts', 'packages/objects/src/provenance/object-lineage.ts', 'packages/objects/src/provenance/product-input-evidence.ts', 'packages/objects/src/node/prepared-registry.ts', 'packages/objects/src/registry/object-schema.ts',
   'packages/objects/src/registry/object-catalog.ts', 'site/prepared-catalogue.mjs', 'site/build/prepare/prepare-catalog.mts', 'packages/objects/src/node/catalog-directory.ts',
-  'packages/objects/src/registry/prepared-focus-object.ts', 'packages/objects/src/registry/navigation-distance.ts', 'packages/bake/src/navigation/navigation-destinations.ts',
+  'packages/objects/src/registry/navigable-object.ts', 'packages/objects/src/registry/navigation-distance.ts', 'packages/bake/src/navigation/navigation-destinations.ts',
   'packages/objects/src/registry/overview-object.ts', 'site/prepared-overview-objects.json',
   'site/source/facilities/catalog.json', 'site/source/facilities/render-library.json', 'site/source/facilities/emblem-library.json',
   'site/source/agency-logos.json', 'packages/bake/src/sources/read-source-catalogue.ts',
diff --git a/site/build/prepare/prepare-object-discovery.mts b/site/build/prepare/prepare-object-discovery.mts
index 89a9f907c18..8edde87acab 100644
--- a/site/build/prepare/prepare-object-discovery.mts
+++ b/site/build/prepare/prepare-object-discovery.mts
@@ -96,9 +96,28 @@ export async function preparedRuntimeCamera(path: string): Promise<unknown> {
   } finally { await handle.close(); }
 }
 
+/** What a bank shows is its observations: images and volumes built from them are imagery; a bank of catalogue points is
+ * measured, not pictured. */
+const DATASET_PACKAGE_IMAGERY: Readonly<Record<string, boolean>> = { 'image-layer-bank': true, 'volume-dataset-bank': true, 'catalogue-point-bank': false };
+
 export async function prepareObjectDiscovery(descriptor: unknown, objectDirectory: string) {
+  if (isRecord(descriptor) && isRecord(descriptor.properties) && isRecord(descriptor.properties.recipe) && Array.isArray(descriptor.properties.recipe.surfaces) && !descriptor.properties.recipe.surfaces.length) {
+    // An object with no surface shows the banks its datasets name: it is pictured when one of them is imagery. It is a
+    // place on the map by itself, so it is featured.
+    const content: unknown = JSON.parse(await readFile(resolve(objectDirectory, 'source/content/object.json'), 'utf8'));
+    const controls = isRecord(content) && isRecord(content.datasets) && Array.isArray(content.datasets.controls) ? content.datasets.controls : [];
+    const banks = new Set(controls.flatMap(control => isRecord(control) && isRecord(control.volume) && typeof control.volume.objectId === 'string' ? [control.volume.objectId] : []));
+    let imagery = false;
+    for (const bank of banks) {
+      const companion: unknown = JSON.parse(await readFile(resolve(objectDirectory, '..', bank, 'object.json'), 'utf8'));
+      if (!isRecord(companion) || typeof companion.type !== 'string' || !Object.hasOwn(DATASET_PACKAGE_IMAGERY, companion.type)) throw new TypeError(`src/objects/${bank}/object.json: ${String(descriptor.id)} shows it as a dataset, but it is not a bank package.`);
+      imagery ||= DATASET_PACKAGE_IMAGERY[companion.type]!;
+    }
+    const policy = discoveryPolicy(descriptor.properties.catalog);
+    return { imagery, illustration: false, featured: true, ...(policy.orientationReference === undefined ? {} : { orientationReference: policy.orientationReference }) };
+  }
   if (!isRecord(descriptor) || !isRecord(descriptor.properties) || !isRecord(descriptor.properties.recipe) ||
-      !Array.isArray(descriptor.properties.recipe.sources)) throw new TypeError('Missing discovery recipe sources.');
+      !Array.isArray(descriptor.properties.recipe.sources)) throw new TypeError(`Missing discovery recipe sources: ${isRecord(descriptor) ? String(descriptor.id) : 'unknown object'}.`);
   const inputs: unknown[] = [];
   for (const source of descriptor.properties.recipe.sources) {
     if (!isRecord(source) || typeof source.id !== 'string' || typeof source.path !== 'string') throw new TypeError('Invalid discovery recipe source.');
diff --git a/site/build/prepare/prepare-spatial-context.ts b/site/build/prepare/prepare-spatial-context.ts
index f16c225feee..58f998f89a7 100644
--- a/site/build/prepare/prepare-spatial-context.ts
+++ b/site/build/prepare/prepare-spatial-context.ts
@@ -3,7 +3,7 @@ import { dirname, resolve } from 'node:path';
 import { pathToFileURL } from 'node:url';
 import { BODIES, EXOPLANET_IDS, HOSTED_PLANET_IDS, M_PER_AU, M_PER_KM, SOLAR_EFFECTIVE_TEMPERATURE_K, SOLAR_RADIUS_M, STAR_IDS, isSceneSatellite, sceneSatelliteStateKm, starAstrometry } from '@cssearth/astronomy';
 import type { StarId } from '@cssearth/astronomy';
-import { mapLabel, parseObjectDescriptor } from '@cssearth/objects';
+import { isPlacedClassification, mapLabel, parseObjectDescriptor } from '@cssearth/objects';
 import { isRecord } from '@cssearth/core';
 import { packPreparedBinary, readCatalog, readPreparedObjects } from '@cssearth/objects/node';
 import { worldOrbitBankRegions } from '@cssearth/renderer';
@@ -79,15 +79,15 @@ export async function prepareSpatialContext(options: SpatialContextPreparationOp
   // the colour its marker, orbit and caption take (its swatch, else its catalogue colour lifted for caption contrast,
   // @cssearth/objects `contextColour`), capitals for a star, black hole or planet's caption, and its classification and system name.
   {
-    const prepared = readPreparedObjects(process.cwd()), registry = prepared.sceneObjects;
+    // Every placed object the world draws: the scenes and the packages the world's host draws.
+    const prepared = readPreparedObjects(process.cwd()), registry = prepared.worldObjects;
     const { contextColour } = await import('@cssearth/objects');
     const { contextAnnotationOpacity } = await import('@cssearth/renderer/navigation/marker-presentation.ts');
         const { isJplMissionTarget } = await import(pathToFileURL(resolve(process.cwd(), 'site/build/prepare/jpl-mission-targets.mts')).href) as typeof import('./jpl-mission-targets.mts');
     const objectsRoot = options.objectsDirectory ?? dirname(dirname(dirname(dirname(options.sourcePath))));
     const byId = new Map(registry.map(object => [object.id, object]));
     // The catalogue step's discovery records, as the prepared catalogue holds them: what the world's visibility reads per body.
-    const discoveries: Record<string, unknown> = Object.fromEntries(prepared.entries.flatMap(entry =>
-      entry.kind === 'scene' && isRecord(entry.descriptor) && typeof entry.descriptor.id === 'string' ? [[entry.descriptor.id, entry.discovery]] : []));
+    const discoveries: Record<string, unknown> = Object.fromEntries(registry.map(object => [object.id, object.discovery]));
     const present = async (body: Record<string, unknown>) => {
       const object = byId.get(String(body.id));
       if (!object) return;
@@ -127,7 +127,7 @@ export async function prepareSpatialContext(options: SpatialContextPreparationOp
   const source = parseWorldContextSource(input);
   const geometry = await loadSolarGeometry(options.solarGeometryPath);
   // The application registry owns classification; preparation bakes its orbit presentation.
-  const SCENE_OBJECTS = readPreparedObjects(process.cwd()).sceneObjects;
+  const SCENE_OBJECTS = readPreparedObjects(process.cwd()).worldObjects;
   const planetIds = new Set(SCENE_OBJECTS.filter(body => body.classification === 'planet').map(body => body.id));
   const classifications = new Map(SCENE_OBJECTS.map(body => [body.id, body.classification]));
   // A planet of another star closes its orbit. A star on a hosted orbit (an S-star around Sgr A*) draws the half-orbit trail a
@@ -158,7 +158,7 @@ export async function prepareSpatialContext(options: SpatialContextPreparationOp
     // A star other than the focus is placed, not orbiting: the context carries its position and radius and draws no trajectory.
     // A planet of another star closes its orbit around that star, which makes the star the root of its own planetary system.
     const classification = classifications.get(body.id);
-    facts[body.id] = { radiusM, orbitStyle: hostedStarIds.has(body.id) ? 'trail' : hostedIds.has(body.id) ? 'closed' : classification === 'star' || classification === 'black-hole' ? 'none' : planetIds.has(body.id) || classification === 'exoplanet' ? 'closed' : 'trail', classification };
+    facts[body.id] = { radiusM, orbitStyle: hostedStarIds.has(body.id) ? 'trail' : hostedIds.has(body.id) ? 'closed' : isPlacedClassification(classification) ? 'none' : planetIds.has(body.id) || classification === 'exoplanet' ? 'closed' : 'trail', classification };
   }
   // A star measured to be bound to another with no measured orbit carries the pair's centre of mass, weighted by the
   // published masses (as gravitational parameters) at the two prepared positions.
@@ -335,7 +335,8 @@ function orbits(value: unknown): Readonly<Record<string, Orbit>> {
     const orbit = record(value, `Solar geometry orbit ${id}`);
     if ((orbit.centerBodyId === undefined) !== (orbit.centerPositionAu === undefined)) throw new TypeError(`${id} orbit parent and centre must be declared together.`);
     const semiMajorAxisAu = number(orbit.semiMajorAxisAu, `${id} semi-major axis`), orbitEccentricity = eccentricity(orbit.eccentricity, id);
-    if (!(orbitEccentricity < 1 ? semiMajorAxisAu > 0 : semiMajorAxisAu < 0)) throw new TypeError(`${id} semi-major axis and eccentricity are incompatible.`);
+    // A straight path (eccentricity exactly 1, a placed body moving along its line of sight or held still) is bound or unbound.
+    if (!(orbitEccentricity < 1 ? semiMajorAxisAu > 0 : orbitEccentricity === 1 ? semiMajorAxisAu !== 0 : semiMajorAxisAu < 0)) throw new TypeError(`${id} semi-major axis ${semiMajorAxisAu} AU and eccentricity ${orbitEccentricity} are incompatible.`);
     return [id, { semiMajorAxisAu, eccentricity: orbitEccentricity, heliocentricDistanceAu: positive(orbit.heliocentricDistanceAu, `${id} distance`),
       perihelionDirection: vector3(orbit.perihelionDirection, `${id} perihelion`), trueAnomalyDegrees: number(orbit.trueAnomalyDegrees, `${id} anomaly`),
       ...(orbit.centerBodyId === undefined ? {} : { centerBodyId: text(orbit.centerBodyId, `${id} orbit parent`), centerPositionAu: vector3(orbit.centerPositionAu, `${id} orbit centre`) }),
diff --git a/site/build/prepare/prepare-volume-presentation.mts b/site/build/prepare/prepare-volume-presentation.mts
index e30d4107281..20f63a22c37 100644
--- a/site/build/prepare/prepare-volume-presentation.mts
+++ b/site/build/prepare/prepare-volume-presentation.mts
@@ -114,11 +114,12 @@ export interface HostedDatasets {
   objectId: string; name: string; route: string; datasets: Record<string, { datasetId: string; label: string }>;
 }
 /** The body an attached volume's delivery names, and which of the body's own datasets shows each of the volume's datasets. */
-async function hostedDatasets(root: string, base: string, objectId: string, datasetIds: readonly string[], input: (path: string) => Promise<Buffer>): Promise<HostedDatasets | undefined> {
+async function hostedDatasets(root: string, base: string, objectId: string, datasetIds: readonly string[], input: (path: string) => Promise<Buffer>, declared?: string): Promise<HostedDatasets | undefined> {
+  // The bank's descriptor names its host (`properties.host`); a bank attached to a body is hosted by that body.
   const deliveryPath = `${base}/source/delivery.json`;
-  const exists = await readFile(resolve(root, deliveryPath)).then(() => true, (error: unknown) => { if (hasErrorCode(error, 'ENOENT')) return false; throw error; });
-  if (!exists) return undefined;
-  const host = sourceObject(json(await input(deliveryPath))).attachedTo;
+  const attached = declared !== undefined ? undefined : await readFile(resolve(root, deliveryPath)).then(() => true, (error: unknown) => { if (hasErrorCode(error, 'ENOENT')) return false; throw error; })
+    ? sourceObject(json(await input(deliveryPath))).attachedTo : undefined;
+  const host = declared ?? attached;
   if (host === undefined) return undefined;
   const hostId = sourceId(host), content = sourceObject(json(await input(`src/objects/${hostId}/source/content/object.json`)));
   const datasets: Record<string, { datasetId: string; label: string }> = {};
@@ -144,7 +145,7 @@ export async function readPreparedVolumes({ root = process.cwd(), input = path =
     const lineage = volumeLineage(record, manifest, descriptor.type === 'image-layer-bank');
     const prepared = parsePreparedVolumePresentation(json(await input(`${base}/prepared/presentation.json`)),
       { id: record.objectId, defaultDataset: record.defaultDataset, datasets: record.datasets }, lineage.sources);
-    const hostedBy = await hostedDatasets(root, base, record.objectId, prepared.controls.map(control => control.id), input);
+    const hostedBy = await hostedDatasets(root, base, record.objectId, prepared.controls.map(control => control.id), input, typeof descriptor.properties.host === 'string' ? descriptor.properties.host : undefined);
     results.push({ id: record.objectId, name: record.name, route: hostedBy?.route ?? `/${record.objectId}/`, base,
       controls: prepared.controls, defaultDataset: prepared.defaultDataset, lineage, outputs: [], ...(hostedBy ? { hostedBy } : {}) });
   }
@@ -276,7 +277,7 @@ export async function prepareVolumePresentations({ root = process.cwd(), objectI
       : [...(current?.assets.filter(asset => asset.location === 'prepared' && !preparedOutputs.some(output => output.filename === asset.filename)) ?? []), ...preparedOutputs];
     const next = mergeInventory(mergeInventory(current, 'public', publicAssets), 'prepared', preparedAssets);
     outputs.push({ path: resolve(root, `${base}/inventory.json`), text: inventoryText(next) });
-    const hostedBy = await hostedDatasets(root, base, record.objectId, record.datasets.map(dataset => dataset.id), input);
+    const hostedBy = await hostedDatasets(root, base, record.objectId, record.datasets.map(dataset => dataset.id), input, typeof descriptor.properties.host === 'string' ? descriptor.properties.host : undefined);
     results.push({ id: record.objectId, name: record.name, route: hostedBy?.route ?? `/${record.objectId}/`, base, controls, defaultDataset: record.defaultDataset, lineage, outputs,
       ...(hostedBy === undefined ? {} : { hostedBy }) });
   }
diff --git a/site/build/prepare/prepare-world-navigation.ts b/site/build/prepare/prepare-world-navigation.ts
index 508faad5c3a..ff8e17d4541 100644
--- a/site/build/prepare/prepare-world-navigation.ts
+++ b/site/build/prepare/prepare-world-navigation.ts
@@ -29,6 +29,23 @@ export async function prepareWorldNavigationDefinition({ objectDirectory, defini
   // The generated module satisfies the frame preparers' contract as it is; typing it by the module keeps drift a type error.
   const geometry: SolarGeometry = solar as typeof import('../../../src/platform/solar-geometry.mts');
   const ecliptic = prepareEclipticPresentationFrame(geometry, descriptor.id);
+  if (!descriptor.recipe.surfaces.length) {
+    // No surface to orient: the scene stands in the ecliptic presentation frame at the object's place, framed at the
+    // radius its solar-system source authors, and the sky rides that frame.
+    const bodyToReference = solar.requireBodyFixedToIcrf(descriptor.id) as Matrix3;
+    const distanceM = solar.requireBodyOrbit(descriptor.id).heliocentricDistanceAu * solar.ASTRONOMICAL_UNIT_KILOMETERS * 1000;
+    const authored = sources.get('solar-system') as { bodyRadiusUnits: number; geometryScale?: number };
+    const renderedRadiusUnits = authored.bodyRadiusUnits * (authored.geometryScale ?? 1);
+    const frame = preparePhysicalWorldFrame({ referenceFrame: 'sun-icrf', epochJdTt: solar.SOLAR_GEOMETRY_EPOCH_JD_TT,
+      originM: transform(bodyToReference, solar.requireBodyFixedSunDirection(descriptor.id) as Vector3).map(component => -component * distanceM) as unknown as Vector3,
+      bodyToReference, bodyToPresentation: ecliptic.basis.flat() as unknown as Matrix3,
+      orbitUpReference: transform(bodyToReference, solar.requireBodyFixedEclipticNorth(descriptor.id)),
+      physicalRadiusM: descriptor.recipe.shape.radiusKm * 1000, renderedRadiusUnits });
+    const sky = { ...definition.sky, sceneRegistration: matrixCss(transpose(frame.presentationToReference)),
+      sceneRegistrationModel: 'icrf-in-authored-presentation-frame', sceneRegistrationEpoch: solar.SOLAR_GEOMETRY_EPOCH_LABEL };
+    return { definition: { ...definition, sky } as Input, frame, systemTransform: null, defaultCamera: null, receipt: { schema: 'cssearth-world-navigation-preparation@1', id: descriptor.id,
+      frame, renderedRadiusUnits, model: 'ecliptic-presentation-frame', ephemerisSource: 'src/platform/solar-geometry.mts' } };
+  }
   const intended = ecliptic.basis.flat() as unknown as Matrix3, placement = await surfacePlacement(objectDirectory, bound, sources.get('features'));
   assertAtlasOrigins(descriptor.id, sources.get('raster'), placement);
   // The body is drawn in its ecliptic presentation frame: the outermost mesh node is solved through whatever the lane placed below it.
diff --git a/site/build/prepare/prepare-world-presentation.mts b/site/build/prepare/prepare-world-presentation.mts
index 4d7c2d2ec12..2d8893fd402 100644
--- a/site/build/prepare/prepare-world-presentation.mts
+++ b/site/build/prepare/prepare-world-presentation.mts
@@ -9,9 +9,7 @@ import { dirname, resolve } from 'node:path';
 import majorMoons from '../../source/major-moons.json' with { type: 'json' };
 import galaxies from '../../../src/objects/local-group/source/presentation.json' with { type: 'json' };
 import clusters from '../../../src/objects/galaxy-clusters/source/presentation.json' with { type: 'json' };
-import { discoveryVisibility, matchesObjectClassification, type ObjectDiscovery } from '@cssearth/objects';
-import { catalogueClassification, isNavigableCatalogObject, isPreparedCluster, isPreparedNebula, type PreparedCatalogObject } from '@cssearth/catalog';
-import { readPreparedCatalogObjects } from '@cssearth/bake/navigation';
+import { discoveryVisibility, type ObjectDiscovery } from '@cssearth/objects';
 import { WORLD_OBJECTS } from '../../world-objects.mts';
 import { APPLICATION_WORLD_CONTEXT, WORLD_SYSTEM_HOSTS } from '../../world-context-plan.mts';
 import { systemFramingRadii } from '../../system-framing-radii.mts';
@@ -99,13 +97,11 @@ export function notableBodies(worldObjects: readonly { id: string; discovery: {
 }
 
 /** Every category's frame, from the members its pill marks: the world's bodies it highlights with the default settings (the same
- * discoveryVisibility the browser runs), and the catalogue rows the galaxy layer draws (packages/renderer/src/universe/
- * prepared-galaxy-catalog.ts: the Local Group's galaxies with a page, the clusters, and the nebulae with a page). A category whose
+ * discoveryVisibility the browser runs): the galaxies, clusters and nebulae with a package are bodies among them. A category whose
  * notable bodies (notableBodies) are only some of its members, at least two, is marked and framed by those alone, listed as its
  * memberIds: the 40 notable exoplanets and stars, not all 865 and 2,174. hostIds lists the placed stars whose systems hold the
- * marked members: from afar a planet is drawn inside its star's dot, so the pill marks that star too. The world and the catalogues
- * share the Sun-centred ICRF frame and epoch. */
-export function prepareCategoryFrames(worldObjects: typeof WORLD_OBJECTS, catalogue: readonly PreparedCatalogObject[],
+ * marked members: from afar a planet is drawn inside its star's dot, so the pill marks that star too. */
+export function prepareCategoryFrames(worldObjects: typeof WORLD_OBJECTS,
   defaultFeatures: ReadonlySet<string>, orbitFeatures: ReadonlySet<string>, notable: ReadonlySet<string>,
   centreOf: ReadonlyMap<string, string>, worldHostId: string) {
   // Where a member is drawn from afar: inside the dot of the placed star its orbits lead to. The world's own host (the Sun) is
@@ -116,18 +112,16 @@ export function prepareCategoryFrames(worldObjects: typeof WORLD_OBJECTS, catalo
     for (let steps = 0; steps <= centreOf.size && centreOf.has(at); steps++) at = centreOf.get(at)!;
     return at !== id && placedStars.has(at) ? at : null;
   };
-  const drawn = catalogue.filter(object => isNavigableCatalogObject(object) && (isPreparedCluster(object) || isPreparedNebula(object) || object.membership.group === 'local-group'));
-  const classifications = [...new Set([...worldObjects.map(object => object.classification), ...drawn.map(catalogueClassification)])].sort();
+  const classifications = [...new Set(worldObjects.map(object => object.classification))].sort();
   return Object.fromEntries(classifications.flatMap(classification => {
     const marked = new Set(discoveryVisibility(worldObjects, { illustrations: false, highlighted: classification, defaultFeatures, orbitFeatures }).highlightedBodies);
     const bodies = worldObjects.filter(object => marked.has(object.id)), notables = bodies.filter(object => notable.has(object.id));
     const narrowed = notables.length >= 2 && notables.length < bodies.length;
-    const frame = prepareCategoryFrame([...(narrowed ? notables : bodies).map(object => {
+    const frame = prepareCategoryFrame((narrowed ? notables : bodies).map(object => {
       // Preparation reads every system's file (site/world-context-plan.mts), so every body is placed.
       if (!object.worldFrame) throw new TypeError(`${object.id} has no world position; the world context read here lacks its system.`);
       return object.worldFrame.originM;
-    }),
-      ...drawn.filter(object => matchesObjectClassification(catalogueClassification(object), classification)).map(object => object.positionM)]);
+    }));
     const markedBodies = narrowed ? notables : bodies;
     const hostIds = [...new Set(markedBodies.flatMap(object => hostOf(object.id) ?? []))];
     return frame ? [[classification, { ...frame, ...(narrowed ? { memberIds: notables.map(object => object.id) } : {}), ...(hostIds.length ? { hostIds } : {}) }] as const] : [];
@@ -140,7 +134,7 @@ function orbitCentres(context: typeof APPLICATION_WORLD_CONTEXT): ReadonlyMap<st
     ...Object.entries(context.orbitCenters ?? {}).map(([id, centre]) => [id, centre.centerBodyId] as const)]);
 }
 
-export function prepareWorldPresentation(satelliteSystemIntroductions: Readonly<Record<string, string>>, catalogue: readonly PreparedCatalogObject[]) {
+export function prepareWorldPresentation(satelliteSystemIntroductions: Readonly<Record<string, string>>) {
   const minor = minorMoonOrbitIds(APPLICATION_WORLD_CONTEXT.bodies);
   const defaultFeatureIds = SCENE_OBJECTS.filter(isDefaultContextFeature).map(object => object.id);
   const orbitFeatureIds = SCENE_OBJECTS.filter(orbitFeature).map(object => object.id);
@@ -155,7 +149,7 @@ export function prepareWorldPresentation(satelliteSystemIntroductions: Readonly<
     galaxies: { fadeStartDistanceM: galaxies.fadeStartDistanceM, fullDistanceM: galaxies.fullDistanceM, maximumDistanceM: galaxies.maximumDistanceM,
       minimumDistanceRadii: galaxies.minimumDistanceRadii, defaultFocusRadiusM: galaxies.defaultFocusRadiusM, metersPerParsec: galaxies.metersPerParsec },
     clusters: { fadeStartDistanceM: clusters.fadeStartDistanceM, fullDistanceM: clusters.fullDistanceM },
-    categoryFrames: prepareCategoryFrames(WORLD_OBJECTS, catalogue, new Set(defaultFeatureIds), new Set(orbitFeatureIds),
+    categoryFrames: prepareCategoryFrames(WORLD_OBJECTS, new Set(defaultFeatureIds), new Set(orbitFeatureIds),
       notableBodies(WORLD_OBJECTS, new Set(defaultFeatureIds), orbitCentres(APPLICATION_WORLD_CONTEXT)), orbitCentres(APPLICATION_WORLD_CONTEXT),
       APPLICATION_WORLD_CONTEXT.focus.id),
     // Every system whose bodies are their own file, framed before a page reads it (site/system-framing.mts).
@@ -167,7 +161,7 @@ export function prepareWorldPresentation(satelliteSystemIntroductions: Readonly<
 export async function writeWorldPresentation() {
   const catalogue = await readSourceCatalog(resolve(import.meta.dirname, '../../..'));
   const introductions = prepareSystemIntroductions(systemText, allSatelliteSystems().map(system => system.hostId), new Set(catalogue.records.map(record => record.id)));
-  const text = `${JSON.stringify(prepareWorldPresentation(introductions, await readPreparedCatalogObjects(resolve(import.meta.dirname, '../../../src/objects'))))}\n`;
+  const text = `${JSON.stringify(prepareWorldPresentation(introductions))}\n`;
   await mkdir(dirname(output), { recursive: true });
   if (await readFile(output, 'utf8').catch(() => null) !== text) await writeFile(output, text);
 }
diff --git a/site/build/prepare/surfaceless-scene.ts b/site/build/prepare/surfaceless-scene.ts
new file mode 100644
index 00000000000..c9432d7dee2
--- /dev/null
+++ b/site/build/prepare/surfaceless-scene.ts
@@ -0,0 +1,82 @@
+// The scene of an authored object with no surface (`recipe.surfaces: []`): a galaxy, a nebula, a cluster of galaxies. It is
+// the scene every body has with no body in it: the camera, sky and world frame the shared scene preparers give its
+// astronomy record. Its datasets show context banks as their companions; the world draws those, the scene is where the
+// page stands. prepare-authored.ts runs it as one of its lanes.
+import { readFile } from 'node:fs/promises';
+import { dirname, resolve } from 'node:path';
+import { parsePreparedObjectRuntime, requireControls } from '@cssearth/renderer';
+import { CUBIC_SKY_CAMERA_PRESENTATION_STANDARD, prepareCubicSky } from '@cssearth/bake/presentation';
+import { prepareSolarSystemScene } from '@cssearth/bake/objects/scene';
+
+type SolarGeometry = Parameters<typeof prepareSolarSystemScene>[0];
+export interface SurfacelessSource { readonly bodyId: string; readonly bodyRadiusUnits: number; readonly bodyRadiusKilometers: number;
+  readonly defaultZoom?: number; readonly geometryScale?: number; readonly maximumZoom?: number }
+
+export async function prepareSurfacelessScene({ source, controls, solarGeometry }: { source: SurfacelessSource; controls: { datasets: { controls: readonly { id: string }[] } | null; settings: unknown }; solarGeometry: SolarGeometry }) {
+  const id = source.bodyId;
+  const scene = await prepareSolarSystemScene(solarGeometry, { ...source, bodyId: id as never, light: 'self',
+    starfield: prepareCubicSky({ objectId: id, cameraContract: CUBIC_SKY_CAMERA_PRESENTATION_STANDARD }) } as never);
+  // The world-navigation stage gives the scene its world frame and registers the sky in it, as it does for every body.
+  const sky = scene.starfield;
+  requireControls(controls as never);
+  const camera = scene.camera;
+  const node = (parent: number, className: string, style = '', attributes: Record<string, string> = {}) => ({ parent, tag: 'div', className, style, properties: [], attributes });
+  const definition = { schema: 'cssearth-object-runtime@5', camera, sky, sun: null,
+    assets: { entries: [], pools: [{ id: 'material', capacity: 8, concurrency: 8, retention: 'selection', reuse: false }], startup: [] },
+    tree: { nodes: [node(-1, 'polycss-camera object-render-root'),
+      node(0, 'polycss-scene', `transform:${camera.defaultTransform}`, { 'aria-hidden': 'true', 'data-polycss-lighting': 'baked' }),
+      node(1, `polycss-mesh ${id}-system`, `transform:${scene.systemTransform}`)],
+      properties: [{ name: 'scale', value: '1', custom: false }], camera: 0, scene: 1, stageClasses: [], activationGroups: [], textureBindings: [] },
+    variants: (controls.datasets?.controls ?? []).map(control => ({ when: { datasetId: control.id }, required: [], writes: [], materials: [] })),
+    materials: [], viewBindings: [{ kind: 'view-attribute', target: -1, property: 'data-lod', source: 'level-of-detail-stage', precision: null }],
+    animations: [], id, controls, motion: [] };
+  parsePreparedObjectRuntime(definition, { parsedJson: true });
+  return { definition, scene };
+}
+
+/** A bank of dots as seen from the Sun: each dot in its own colour on the plane across the line of sight to the bank's
+ * middle, north up and east left as the sky is drawn, fitted to the picture. Returns the picture's public address. */
+export async function dotsPicture(bankDirectory: string, outputPath: string): Promise<void> {
+  const { unpackPreparedBinary } = await import('@cssearth/objects/node');
+  const { decodeCatalogueBankBinary } = await import('@cssearth/renderer/prepared-data/catalogue-bank-binary.ts');
+  const bank = decodeCatalogueBankBinary(unpackPreparedBinary(await readFile(resolve(bankDirectory, 'prepared/dots.bin'))), `${bankDirectory}/prepared/dots.bin`);
+  const points = bank.points as readonly (readonly number[])[], appearance = bank.appearance as { colorCss: string; palette?: readonly string[] };
+  if (!Array.isArray(points) || !points.length) throw new TypeError(`${bankDirectory}/prepared/dots.bin: a bank of dots has points.`);
+  const centre = [0, 1, 2].map(axis => points.reduce((sum, point) => sum + point[axis]!, 0) / points.length);
+  const distance = Math.hypot(...centre), sight: number[] = centre.map(value => value / distance);
+  // East and north on the sky at the bank's middle, from the ICRF pole.
+  const east: number[] = [-sight[1]!, sight[0]!, 0].map(value => value / Math.hypot(sight[0]!, sight[1]!));
+  const north: number[] = [sight[1]! * east[2]! - sight[2]! * east[1]!, sight[2]! * east[0]! - sight[0]! * east[2]!, sight[0]! * east[1]! - sight[1]! * east[0]!];
+  const along = (offset: readonly number[], direction: readonly number[]) => offset.reduce((sum: number, value: number, axis: number) => sum + value * direction[axis]!, 0);
+  const flat = points.map(point => { const offset = point.slice(0, 3).map((value: number, axis: number) => value - centre[axis]!);
+    return { x: -along(offset, east), y: -along(offset, north), palette: point[3] }; });
+  const SIZE = 160, reach = Math.max(...flat.map(dot => Math.max(Math.abs(dot.x), Math.abs(dot.y)))) * 1.05, pixels = Buffer.alloc(SIZE * SIZE * 3);
+  for (const dot of flat) {
+    const colour = (dot.palette === undefined ? appearance.colorCss : appearance.palette?.[dot.palette]) ?? appearance.colorCss;
+    const column = Math.round((dot.x / reach + 1) / 2 * (SIZE - 1)), row = Math.round((dot.y / reach + 1) / 2 * (SIZE - 1));
+    for (let channel = 0; channel < 3; channel++) pixels[(row * SIZE + column) * 3 + channel] = Number.parseInt(colour.slice(1 + channel * 2, 3 + channel * 2), 16);
+  }
+  const sharp = (await import('sharp')).default, { mkdir } = await import('node:fs/promises');
+  await mkdir(dirname(outputPath), { recursive: true });
+  await sharp(pixels, { raw: { width: SIZE, height: SIZE, channels: 3 } }).webp({ lossless: true }).toFile(outputPath);
+}
+
+/** The thumbnail of each dataset that shows a companion bank, written to the object's public directory under the name the
+ * dataset authors: a bank of dots is drawn as it lies on the sky; a bank that publishes a picture of its dataset lends it. */
+export async function companionThumbnails({ objectDirectory, publicDirectory, content }: { objectDirectory: string; publicDirectory: string; content: unknown }) {
+  const controls = ((content as { datasets?: { controls?: unknown } }).datasets?.controls ?? []) as { id: string; thumbnail?: string; volume?: { objectId: string; datasetId: string } }[];
+  const { copyFile, mkdir } = await import('node:fs/promises');
+  for (const control of controls) {
+    if (!control.volume || !control.thumbnail || control.thumbnail.startsWith('/')) continue;
+    const bankDirectory = resolve(objectDirectory, '..', control.volume.objectId), output = resolve(publicDirectory, control.thumbnail);
+    const bank = JSON.parse(await readFile(resolve(bankDirectory, 'object.json'), 'utf8')) as { prepared?: { format?: string } };
+    if (bank.prepared?.format === 'cssearth-catalogue-points-bin@1') { await dotsPicture(bankDirectory, output); continue; }
+    const presentation = JSON.parse(await readFile(resolve(bankDirectory, 'prepared/presentation.json'), 'utf8')) as { controls: { id: string; thumbnailUrl: string }[] };
+    const picture = presentation.controls.find(candidate => candidate.id === control.volume!.datasetId)?.thumbnailUrl;
+    const prefix = `/scenes/${control.volume.objectId}/`;
+    if (!picture?.startsWith(prefix)) throw new TypeError(`${bankDirectory}/prepared/presentation.json: dataset ${control.volume.datasetId} names no picture under ${prefix}.`);
+    await mkdir(dirname(output), { recursive: true });
+    // The bank's public files are the checkout's, whatever directory this run stages the object's own into.
+    await copyFile(resolve(objectDirectory, '../../../public/scenes', control.volume.objectId, picture.slice(prefix.length)), output);
+  }
+}
diff --git a/site/build/prerender-focus-pages.mts b/site/build/prerender-level-pages.mts
similarity index 81%
rename from site/build/prerender-focus-pages.mts
rename to site/build/prerender-level-pages.mts
index 2db478fb546..c5e958f0eb8 100644
--- a/site/build/prerender-focus-pages.mts
+++ b/site/build/prerender-level-pages.mts
@@ -1,9 +1,9 @@
-// Entry script: node site/build/prerender-focus-pages.mts (in build:deploy, after bundle-netlify-functions.mts)
+// Entry script: node site/build/prerender-level-pages.mts (in build:deploy, after bundle-netlify-functions.mts)
 /**
- * The page of anything the world draws (a catalogue subject, an overview) is the world host's page with it selected
- * (site/pages/[id].astro). The search function renders that selection (the scene, card and datasets, and a focus's
- * camera; an overview's camera is framed on arrival) into the page for any query URL. This renders it into each such
- * static page once, through the same bundled function, so the page opens on its subject with or without JavaScript.
+ * A level of the zoom ladder has no scene of its own: its page is the world host's page framed on it
+ * (site/pages/[id].astro). The search function renders that selection into the page for any query URL. This renders it
+ * into each level's static page once, through the same bundled function, so the page opens on its card with or without
+ * JavaScript.
  */
 import { readFile, writeFile } from 'node:fs/promises';
 import { extname, resolve, sep } from 'node:path';
@@ -33,7 +33,7 @@ if (typeof loaded !== 'object' || loaded === null || !('default' in loaded) || t
   throw new Error('netlify/functions-bundled/search.mjs has no default export handler; run site/build/bundle-netlify-functions.mts first.');
 }
 const handler = loaded.default as (request: Request) => Promise<Response>;
-const pages = readPreparedObjects(root).objects.filter(object => object.kind !== 'scene').map(object => object.id);
+const pages = readPreparedObjects(root).levels.map(level => level.id);
 for (const id of pages) {
   const response = await handler(new Request(`${origin}/.netlify/functions/search?object=${encodeURIComponent(id)}`));
   if (!response.ok) throw new Error(`${id}: the search function answered ${response.status} for /${id}/: ${(await response.text()).slice(0, 300)}`);
diff --git a/site/built-pages.mts b/site/built-pages.mts
index 1a06c5d4ee5..ffe98937e26 100644
--- a/site/built-pages.mts
+++ b/site/built-pages.mts
@@ -1,8 +1,8 @@
 // `CSSEARTH_BUILD_PAGES=/,/earth/ astro build`: a production build that prerenders only the named object pages and the
 // scene routes they mount, for a cold test that opens a few pages, not all of them. Unset, every route builds as before.
 
-/** What a page needs of an `OBJECTS` entry: a scene mounts itself; anything else mounts its host scene. */
-interface PageObject { readonly id: string; readonly kind: string; readonly sceneHostId?: string }
+/** A page: an object's mounts its own scene; a level's mounts the scene of `sceneHostId`, the world host, with it selected. */
+interface PageObject { readonly id: string; readonly sceneHostId?: string }
 interface IdPath { readonly params: { readonly id: string } }
 
 /** The page paths `CSSEARTH_BUILD_PAGES` names (`/` and `/<id>/`, comma-separated), or null when every page builds. */
@@ -47,7 +47,7 @@ export function builtScenePaths<Path extends IdPath>(paths: Path[], objects: rea
   if (!named) return paths;
   const root = objects.find(object => object.id === rootId);
   if (!root) throw new TypeError(`The root object ${rootId} is not in OBJECTS.`);
-  const scene = (object: PageObject) => (object.kind === 'scene' ? object.id : object.sceneHostId);
+  const scene = (object: PageObject) => object.sceneHostId ?? object.id;
   const mounted = new Set([...named, ...(namedPages(env)?.has('/') ? [root] : [])].map(scene));
   return paths.filter(path => mounted.has(path.params.id));
 }
diff --git a/site/components/DatasetList.astro b/site/components/DatasetList.astro
index 12a20f083b5..908cc7e3071 100644
--- a/site/components/DatasetList.astro
+++ b/site/components/DatasetList.astro
@@ -8,15 +8,13 @@ import { sidebarThumbnail } from '../sidebar-thumbnails.mts';
 interface Props {
   objectId: string;
   datasets: Pick<NonNullable<ShellProps['datasets']>, 'controls' | 'defaultDataset'>;
-  /** The datasets of something the scene draws (a catalogue focus, an overview), rather than of the scene's own object. */
-  focus?: boolean;
   /** The drawn page these datasets belong to (an overview's id): their buttons select its dataset on its page (page-datasets.mts). */
   page?: string;
   /** Null leaves the form without an action, so it submits to the page it is spliced into. */
   route?: string | null;
   thumbnailObjectId?: string;
 }
-const { objectId, datasets, focus = false, page, route = `/${objectId}/`, thumbnailObjectId = objectId } = Astro.props;
+const { objectId, datasets, page, route = `/${objectId}/`, thumbnailObjectId = objectId } = Astro.props;
 const previewUrl = (dataset: NonNullable<ShellProps['datasets']>['controls'][number]) =>
   sidebarThumbnail(thumbnailObjectId, dataset.id)?.url2x ?? dataset.thumbnailUrl;
 // A dataset that names a companion cloud keeps the plates of another dataset, so the body on screen is drawn in that
@@ -40,7 +38,7 @@ const defaultListedId = defaultControl?.step ? opening(stepMembers(defaultContro
 import Detached from './Detached.astro';
 ---
 <section id={`${objectId}-dataset-list`} class="object-datasets">
-  <form id={`${objectId}-datasets`} action={route ?? undefined} method="get" data-dataset-form data-focus-form={focus || undefined} data-drawn-page={page} hidden>
+  <form id={`${objectId}-datasets`} action={route ?? undefined} method="get" data-dataset-form data-drawn-page={page} hidden>
     {['v', 'overview', 'feature'].map(name => <input type="hidden" name={name} data-view-context disabled />)}
   </form>
   <div id={`${objectId}-layers-menu`} class="object-layers-menu">
@@ -55,7 +53,7 @@ import Detached from './Detached.astro';
           </span>)}
         </span>
         <span class="object-dataset-picker-chevron" aria-hidden="true"></span>
-        <select class="object-dataset-native-select" data-dataset-native-select aria-label={focus ? 'Focus dataset' : 'Dataset'}>
+        <select class="object-dataset-native-select" data-dataset-native-select aria-label="Dataset">
           {datasets.controls.filter(listed).map(dataset => <option value={dataset.id} selected={dataset.id === defaultListedId}>
             {dataset.label}{dataset.detail ? ` — ${dataset.detail}` : ''}
           </option>)}
@@ -71,7 +69,6 @@ import Detached from './Detached.astro';
             type="submit"
             form={`${objectId}-datasets`}
             name="dataset"
-            data-focus-dataset={focus ? true : undefined}
             value={dataset.id}
             aria-pressed={dataset.id === datasets.defaultDataset ? "true" : "false"}
             aria-controls={`${objectId}-${dataset.id}-details`}
@@ -95,9 +92,9 @@ import Detached from './Detached.astro';
     {datasets.controls.map((dataset) => (
       <Detached detached={dataset.id !== datasets.defaultDataset}><div
         id={`${objectId}-${dataset.id}-details`}
-        data-dataset-details={focus ? undefined : dataset.id}
-        data-system-dataset-details={!focus && dataset.systemDataset ? dataset.id : undefined}
-        data-focus-dataset-details={focus ? dataset.id : undefined}
+        data-dataset-details={page ? undefined : dataset.id}
+        data-system-dataset-details={!page && dataset.systemDataset ? dataset.id : undefined}
+        data-page-dataset-details={page ? dataset.id : undefined}
         hidden={dataset.id !== datasets.defaultDataset}
       >
         <DatasetDescription {dataset}>
@@ -115,9 +112,9 @@ import Detached from './Detached.astro';
                 decoding="async"
                 draggable="false"
               />
-              {dataset.step && <SequencePlayer {objectId} {dataset} members={stepMembers(dataset)} {focus} />}
+              {dataset.step && <SequencePlayer {objectId} {dataset} members={stepMembers(dataset)} playable={!page} />}
             </div>}
-          {dataset.step && !dataset.texture && <SequencePlayer {objectId} {dataset} members={stepMembers(dataset)} {focus} />}
+          {dataset.step && !dataset.texture && <SequencePlayer {objectId} {dataset} members={stepMembers(dataset)} playable={!page} />}
           {borrowedLegend(dataset) && <DatasetLegend {objectId} dataset={borrowedLegend(dataset)!} owner={dataset.id} />}
           <DatasetLegend {objectId} {dataset} />
         </DatasetDescription>
diff --git a/site/components/ObjectPage.astro b/site/components/ObjectPage.astro
index b9c238d0cc8..62c8c7b7abd 100644
--- a/site/components/ObjectPage.astro
+++ b/site/components/ObjectPage.astro
@@ -10,7 +10,7 @@ import shellCss from '../object-shell.css?inline';
 import { loadPreparedSceneMarkup } from '../server/load-prepared-scene.mts';
 import { rewriteSceneCss, resolveSceneAddressesDeep, withPreparedAssetOrigin } from '../asset-origin.mts';
 
-/** `objectId` owns the scene; `pageId` is the object the page is, a catalogue focus that scene draws when it differs. */
+/** `objectId` owns the scene; `pageId` is what the page is: the object, or a level of the zoom ladder that scene shows when it differs. */
 interface Props { objectId: string; pageId?: string; navigation?: boolean; home?: boolean; }
 const { objectId, pageId = objectId, navigation = false, home = false } = Astro.props;
 const preparedPage = await loadObjectPageData(objectId);
diff --git a/site/components/ObjectResult.astro b/site/components/ObjectResult.astro
index 4da792d2981..68e9658e93b 100644
--- a/site/components/ObjectResult.astro
+++ b/site/components/ObjectResult.astro
@@ -4,6 +4,7 @@ import type { ObjectEntry } from '../objects.mts';
 import { objectTypeLabel } from '../object-classification-label.mts';
 import { sourceDocumentation } from '../source-documentation.mts';
 import { objectResultMarkup } from '../server/object-result-markup.mts';
+import { objectResultMarker } from '../search/prepared-catalogue-index.mts';
 interface Props { object: ObjectEntry; }
 const { object } = Astro.props;
 const source = sourceDocumentation(object.id, object.name);
@@ -15,7 +16,7 @@ const markup = objectResultMarkup({
   detail: { text: `${value} ${object.distance.unit}`, value, unit: object.distance.unit,
     title: description, ariaLabel: `${value} ${object.distance.unit}. ${description}` },
   source: { subject: `object:${object.id}`, document: source.href, label: source.label },
-  marker: { kind: 'scene', id: object.id, color: object.color },
+  marker: objectResultMarker(object),
 });
 ---
 
diff --git a/site/components/ObjectShell.astro b/site/components/ObjectShell.astro
index e6a5bada599..9d2062d9b94 100644
--- a/site/components/ObjectShell.astro
+++ b/site/components/ObjectShell.astro
@@ -1,8 +1,6 @@
 ---
 import { DIAGNOSTICS_ENABLED } from "../diagnostics-policy.mts";
 import ObjectInformationPanel from "./ObjectInformationPanel.astro";
-import PreparedClusterFacts from './PreparedClusterFacts.astro';
-import { CONTEXT_AVAILABILITY } from '../context-availability.mts';
 import type { Props } from "../object-shell-types";
 import { OVERVIEWS, SCENE_OBJECTS } from "../objects.mts";
 import { PREPARED_SHELL_TITLES } from "../prepared-shell-titles.mjs";
@@ -17,7 +15,6 @@ import ObjectCard from './ObjectCard.astro';
 import SystemHeaders from './SystemHeaders.astro';
 import SystemBodies from './SystemBodies.astro';
 import ObjectBreadcrumbs from './ObjectBreadcrumbs.astro';
-import InformationTabs from './InformationTabs.astro';
 import Accordion from './Accordion.astro';
 import { SOLAR_SYSTEM_ID, systemOfObject } from '../object-systems.mts';
 import { SEARCH_QUERY_LIMIT } from '../search/object-search.mts';
@@ -232,36 +229,7 @@ import Detached from './Detached.astro';
       </ObjectResults>
     </nav></Detached>}
     <div class="object-selected-content">
-    {!navigation && <Detached detached><div class="object-context" hidden><Detached detached><ObjectCard class="object-prepared-information-panel" data-prepared-focus-card hidden>
-        <section class="object-selected-panel">
-          {OVERVIEWS.map(({ id }) =>
-            <ObjectBreadcrumbs scope={id} currentPage={false} data-focus-breadcrumb-scope={id} hidden />)}
-          <div class="object-title-row">
-            <p class="object-title object-title-text" data-focus-name></p>
-            <div class="object-title-tags"><span class="object-classification-tag object-title-tag" data-focus-status></span></div>
-          </div>
-          <p class="object-introduction" data-focus-introduction hidden></p>
-          <a class="object-learn-more-link" data-focus-learn-more target="_blank" rel="noopener noreferrer" hidden>Learn more ↗</a>
-          <p class="object-introduction" data-focus-unavailable role="status" hidden
-            data-unavailable-objects={Object.entries(CONTEXT_AVAILABILITY).filter(([, state]) => !state.available).map(([id]) => id).join(' ')}></p>
-        </section>
-        <InformationTabs idPrefix="prepared-focus" group="prepared-focus" tabs={[{id: 'dataset', label: 'Datasets'}, {id: 'factsheet', label: 'Factsheet'}]} />
-        <div class="object-card-tabpanel" id="prepared-focus-dataset-content" data-information-panel="dataset"
-          data-information-group="prepared-focus" role="region" aria-label="Datasets">
-          {/* The dataset banks are the same on every page; the first focus selection fetches them (`site/focus-fragment.mts`). */}
-          <div data-focus-banks-slot="datasets" hidden></div>
-        </div>
-        <Detached detached><div class="object-card-tabpanel" id="prepared-focus-factsheet-content" data-information-panel="factsheet"
-          data-information-group="prepared-focus" role="region" aria-label="Factsheet">
-          <div class="object-factsheet-body"><div class="object-facts"><ul class="object-primary-facts">
-            <li data-focus-aliases-row hidden><span class="object-fact-label">Also known as</span><span class="object-fact-value" data-focus-aliases></span></li>
-            {[['distance', 'Observer distance'], ['uncertainty', 'Distance uncertainty'], ['membership', 'Membership'], ['association', 'Association']].map(([id, label]) =>
-              <li><span class="object-fact-label" data-focus-fact-label={id}>{label}</span><span class="object-fact-value" {...{ [`data-focus-${id}`]: '' }}></span></li>)}
-          </ul></div></div>
-          <div data-focus-banks-slot="facts" hidden></div>
-          <PreparedClusterFacts />
-        </div></Detached>
-      </ObjectCard></Detached>
+    {!navigation && <Detached detached><div class="object-context" hidden>
       {OVERVIEWS.map(overview => <OverviewCard {overview} />)}
       <Detached detached><ObjectCard class="object-overview-card" data-system-results>
         {/* The Solar System's header and this page's own; the others arrive with the first overview of another system. */}
@@ -286,7 +254,7 @@ import Detached from './Detached.astro';
       <p class="object-destination-context"></p>
       <p class="object-destination-status" role="status"></p>
     </section></Detached>
-    {/* A page that opens on an overview or a catalogue focus shows that card; the body's waits off the page. */}
+    {/* A page that opens on an overview shows that card; the body's waits off the page. */}
     <Detached detached={pageId !== objectId}><ObjectInformationPanel {...Astro.props} /></Detached>
     <div class="object-sheet-sources"><SourcesLink objectId={objectId} name={Astro.props.title.label} /></div>
     </div>
diff --git a/site/components/OverviewCard.astro b/site/components/OverviewCard.astro
index 34299be37cf..58b2006d75e 100644
--- a/site/components/OverviewCard.astro
+++ b/site/components/OverviewCard.astro
@@ -13,42 +13,37 @@ import { overviewResult } from '../server/overview-result.mts';
 import { PREPARED_CATALOGUE_INDEX } from '../search/prepared-catalogue-index.mts';
 import ObjectFactsheet from './ObjectFactsheet.astro';
 import DatasetList from './DatasetList.astro';
-import { OBJECTS, SCENE_OBJECTS } from '../objects.mts';
-import { FOCUS_CATALOG_DATA } from '../focus-catalog-data.mts';
+import { OBJECTS, OVERVIEWS, SCENE_OBJECTS } from '../objects.mts';
+import { WORLD_HOST_ID } from '../navigation/navigation-scope.mts';
 import { pageDatasetList } from '../page-datasets-content.mts';
 import overviewFacts from '../source/overview-facts.json';
 
 /** One overview's card, entirely from its registry entry (overview-object.ts): its name, description and breadcrumbs, its
  * page's datasets, a tab for each group of subjects it holds with a list label, and its factsheet when
  * site/source/overview-facts.json has one. Each held group with a list label lists the registry's
- * subjects of those classifications (catalogue focuses, member overviews), each with its distance from the others. */
+ * objects of those classifications and its member levels, each with its distance from the others. */
 interface Props { overview: OverviewObject }
 const { overview } = Astro.props;
 const PARSEC_M = 3.085677581491367e16;
-const catalogue = new Map(FOCUS_CATALOG_DATA.flatMap(({ data }) => data.objects.map(object => [object.id, object] as const)));
 const distance = (pc: number) => {
   const ly = pc * 3.261563777, divisor = ly >= 1e6 ? 1e6 : ly >= 1e3 ? 1e3 : 1;
   return { value: new Intl.NumberFormat('en', { maximumSignificantDigits: 3 }).format(ly / divisor), unit: divisor === 1e6 ? 'Mly' : divisor === 1e3 ? 'kly' : 'ly' };
 };
 const slug = (label: string) => label.toLocaleLowerCase('en').replace(/[^a-z0-9]+/gu, '-').replace(/^-|-$/gu, '');
 type Member = { id: string; name: string; positionM: readonly number[]; distancePc: number; holdsStars: boolean };
-const members = (classifications: readonly string[]): Member[] => OBJECTS.filter(object => object.id !== overview.id).flatMap((object): Member[] => {
-  if (object.kind === 'prepared-focus') {
-    if (!classifications.includes(object.classification)) return [];
-    const record = catalogue.get(object.id);
-    if (!record) throw new Error(`${overview.id} lists ${object.id}, which no prepared catalogue places.`);
-    return [{ id: object.id, name: object.name, positionM: record.positionM, distancePc: record.distance.valuePc, holdsStars: false }];
-  }
-  if (object.kind === 'overview') {
-    if (!object.classification || !classifications.includes(object.classification)) return [];
-    if (!object.originM) throw new Error(`${overview.id} lists ${object.id}, whose package has no volume origin to place it.`);
-    return [{ id: object.id, name: object.name, positionM: object.originM, distancePc: Math.hypot(...object.originM) / PARSEC_M,
-      holdsStars: object.holds.some(group => group.classifications.includes('star')) }];
-  }
-  if (!classifications.includes(object.classification) || !object.worldFrame) return [];
-  return [{ id: object.id, name: object.name, positionM: object.worldFrame.originM, distancePc: object.distance.meters / PARSEC_M, holdsStars: false }];
+// A level lists the objects of the classifications it holds, and the levels that are members of it (the Milky Way is a
+// galaxy of the Local Group).
+const members = (classifications: readonly string[]): Member[] => [
+  ...OVERVIEWS.filter(level => level.id !== overview.id && level.classification && classifications.includes(level.classification)).map((level): Member => {
+    const originM = level.worldFrame?.originM ?? level.originM;
+    if (!originM) throw new Error(`${overview.id} lists ${level.id}, whose package has neither a world frame nor a volume origin to place it.`);
+    return { id: level.id, name: level.name, positionM: originM, distancePc: Math.hypot(...originM) / PARSEC_M,
+      holdsStars: level.holds.some(group => group.classifications.includes('star')) };
+  }),
+  ...OBJECTS.filter(object => classifications.includes(object.classification)).map((object): Member =>
+    ({ id: object.id, name: object.name, positionM: object.worldFrame.originM, distancePc: object.distance.meters / PARSEC_M, holdsStars: false })),
   // A level lists only the subjects whose own zoom reaches it (M87 is in Virgo, not the Local Group).
-}).filter(member => overviewsReachableFrom(member.positionM).some(level => level.id === overview.id)).sort((a, b) => a.distancePc - b.distancePc);
+].filter(member => overviewsReachableFrom(member.positionM).some(level => level.id === overview.id)).sort((a, b) => a.distancePc - b.distancePc);
 const lists = overview.holds.flatMap(group => {
   if (!group.list) return [];
   return [{ id: slug(group.list), label: group.list, members: members(group.classifications) }];
@@ -59,13 +54,13 @@ const facts = isRecord(factsEntry) ? { facts: factsEntry.facts as ObjectProps['f
 // Unlabelled held scene groups expose a small featured navigation list, using the search's exact rows.
 const classifications = overview.holds.filter(group => !group.list && group.classifications.includes('star')).flatMap(group => group.classifications);
 const sceneMembers = SCENE_OBJECTS.filter(object => classifications.includes(object.classification)
-  && (object.id === overview.sceneHostId || object.discovery.featured)
+  && (object.id === WORLD_HOST_ID || object.discovery.featured)
   && (!overview.zoom.centreWithin || object.distance.meters < overviewDistanceM(overview.zoom.centreWithin)))
-  .sort((a, b) => Number(b.id === overview.sceneHostId) - Number(a.id === overview.sceneHostId) || a.distance.meters - b.distance.meters);
+  .sort((a, b) => Number(b.id === WORLD_HOST_ID) - Number(a.id === WORLD_HOST_ID) || a.distance.meters - b.distance.meters);
 const resultRows = new Map(PREPARED_CATALOGUE_INDEX.entries.filter(row => row.kind !== 'system').map(row => [row.id, row]));
 const memberMarkup = (member: Member) => {
-  const object = OBJECTS.find(object => object.id === member.id);
-  const row = object?.kind === 'overview' ? overviewResult(object) : resultRows.get(member.id);
+  const level = OVERVIEWS.find(level => level.id === member.id);
+  const row = level ? overviewResult(level) : resultRows.get(member.id);
   if (!row) throw new Error(`Missing search row for ${overview.id} member ${member.id}.`);
   const { value, unit } = distance(member.distancePc);
   const text = `≈${value} ${unit}`, title = 'Published catalogue distance from the Solar System';
@@ -92,7 +87,7 @@ import Detached from './Detached.astro';
     role="region" aria-label="Datasets" data-page-datasets={overview.id} data-default-dataset={datasets.defaultDataset}
     data-dataset-views={JSON.stringify(datasets.views)}>
     <DatasetList objectId={`page-${overview.id}`} thumbnailObjectId={overview.id} page={overview.id} route={overview.route}
-      datasets={{ controls: datasets.controls, defaultDataset: datasets.defaultDataset }} focus />
+      datasets={{ controls: datasets.controls, defaultDataset: datasets.defaultDataset }} />
   </div></Detached>}
   {sceneMembers.length > 0 && <Detached detached={opening !== 'bodies'}><div class="object-results-scroll object-card-tabpanel" id={`${overview.id}-bodies-content`} role="region" aria-label="Celestial bodies">
     <ul class="object-list">{sceneMembers.map(object => <ObjectResult {object} />)}</ul>
diff --git a/site/components/PreparedClusterFacts.astro b/site/components/PreparedClusterFacts.astro
deleted file mode 100644
index 7211dca6b2c..00000000000
--- a/site/components/PreparedClusterFacts.astro
+++ /dev/null
@@ -1,14 +0,0 @@
----
-import { parsePreparedClusterCatalog } from '@cssearth/catalog';
-import catalogue from '../../src/objects/galaxy-clusters/prepared/catalogue.json';
-import ObjectFactsheet from './ObjectFactsheet.astro';
-const clusters = parsePreparedClusterCatalog(catalogue);
-const format = new Intl.NumberFormat('en', { maximumSignificantDigits: 4 });
----
-{clusters.objects.map(object => <div data-focus-record-bank={object.id} hidden>
-  <ObjectFactsheet id={`focus-${object.id}-catalogue`} embedded facts={[
-    {id:'aperture',label:'R500 radius',value:format.format(object.aperture.properRadiusM / 3.085677581491367e22)+' Mpc'},
-    {id:'ra',label:'Right ascension',value:format.format(object.skyPosition.raDeg)+'°'},
-    {id:'dec',label:'Declination',value:format.format(object.skyPosition.decDeg)+'°'},
-  ]} />
-</div>)}
diff --git a/site/components/PreparedFocusDatasets.astro b/site/components/PreparedFocusDatasets.astro
deleted file mode 100644
index 5e9caeb615d..00000000000
--- a/site/components/PreparedFocusDatasets.astro
+++ /dev/null
@@ -1,59 +0,0 @@
----
-import DatasetList from './DatasetList.astro';
-import DatasetContextPanels from './DatasetContextPanels.astro';
-import ObjectFactsheet from './ObjectFactsheet.astro';
-import { parsePreparedVolumePresentation } from '../volume-presentation.mts';
-import { imageFocusDatasets } from '@cssearth/renderer/universe';
-import { lineageSource } from '@cssearth/objects/provenance';
-import { sourceArray, sourceObject } from '@cssearth/objects/sources';
-import type { PreparedVolumeDatasetBank } from '@cssearth/renderer/volume/prepared-volume-datasets.ts';
-import { CONTEXT_OBJECT_DESCRIPTORS, CONTEXT_OBJECT_ASSET_URLS } from '../prepared-context-objects.mts';
-import { CONTEXT_OBJECT_PREPARED_JSON, CONTEXT_OBJECT_SOURCE_MANIFESTS } from '../prepared-context-json.mts';
-import { CONTEXT_AVAILABILITY } from '../context-availability.mts';
-import { resolveSceneAddressesDeep } from '../asset-origin.mts';
-import { datasetSourceDetail } from '../dataset-context.mts';
-import { EXPLORATION } from '../exploration-catalog.mts';
-// Page-neutral: the banks render once into the shared focus fragment, so dataset forms submit to the current page.
-interface Props { factsOnly?: boolean }
-const { factsOnly = false } = Astro.props;
-
-type Descriptor = { id: string; type: string; prepared?: { url: string } };
-// Bodies share src/objects; only the generated context objects' prepared JSON is read here.
-const descriptors = CONTEXT_OBJECT_DESCRIPTORS as Record<string, Descriptor>;
-const prepared = CONTEXT_OBJECT_PREPARED_JSON as Record<string, { data: PreparedVolumeDatasetBank } | undefined>;
-const presentations = CONTEXT_OBJECT_PREPARED_JSON;
-const banks = await Promise.all(Object.entries(descriptors).filter(([, descriptor]) => (descriptor.type === 'volume-dataset-bank' && CONTEXT_AVAILABILITY[descriptor.id]?.available) || descriptor.type === 'image-layer-bank').map(async ([path, descriptor]) => {
-  const bank = descriptor.type === 'image-layer-bank'
-    ? { ...imageFocusDatasets(descriptor.id), id: descriptor.id }
-    : prepared[path.replace(/object\.json$/u, descriptor.prepared?.url ?? '')]?.data;
-  if (!bank || bank.id !== descriptor.id) throw new TypeError(`Prepared focus datasets unavailable: ${descriptor.id}.`);
-  // The dataset rows credit each dataset's own source: the manifest input that names the dataset.
-  const sources = sourceArray(sourceObject(CONTEXT_OBJECT_SOURCE_MANIFESTS[path.replace(/object\.json$/u, 'source/manifest.json')]).inputs, raw => lineageSource(raw));
-  // presentation.json (a context object's own prepared JSON, not a Vite asset import) can carry
-  // bare `/scenes/<id>/datasets/<dataset id>.webp` dataset-preview addresses that Vite never rewrites.
-  const parsedPresentation = await resolveSceneAddressesDeep(parsePreparedVolumePresentation(presentations[path.replace(/object\.json$/u, 'prepared/presentation.json')], bank, sources));
-  const presentation = { ...parsedPresentation, controls: parsedPresentation.controls.map(dataset => {
-    const { detail: _preparedDetail, ...control } = dataset;
-    const detail = datasetSourceDetail(dataset.id, sources, EXPLORATION.catalog);
-    return { ...control, ...(detail ? { detail } : {}) };
-  }) };
-  const directSourceIdsByDataset = Object.fromEntries(presentation.controls.map(dataset => [dataset.id,
-    sources.filter(source => source.datasetId === dataset.id).map(source => source.id)]));
-  const prefix = path.replace(/object\.json$/u, '');
-  const resources = Object.fromEntries(Object.entries(CONTEXT_OBJECT_ASSET_URLS).filter(([path]) => path.startsWith(prefix)).map(([path, url]) => [path.slice(prefix.length), url]));
-  return { bank, presentation, directSourceIdsByDataset, descriptor, resources };
-}));
-import Detached from './Detached.astro';
----
-{banks.map(({ bank, presentation, directSourceIdsByDataset, descriptor, resources }) => factsOnly ? <div data-focus-facts-bank={bank.id} hidden>
-  {presentation.controls.map(dataset => <Detached detached={dataset.id !== presentation.defaultDataset}><div data-focus-dataset-details={dataset.id} hidden={dataset.id !== presentation.defaultDataset}>
-    <ObjectFactsheet id={`focus-${bank.id}-${dataset.id}`} facts={[
-      { id: 'dataset', label: 'Dataset', value: dataset.label },
-      ...(dataset.facts ?? []),
-    ]} embedded />
-  </div></Detached>)}
-</div> : <div class="object-dataset-content" data-focus-dataset-bank={bank.id} hidden>
-  <script is:inline type="application/json" data-focus-resources set:html={JSON.stringify({ descriptor, resources }).replace(/</g, '\\u003c')}></script>
-  <DatasetList objectId={`focus-${bank.id}`} thumbnailObjectId={bank.id} route={null} datasets={presentation} focus />
-  <DatasetContextPanels objectId={bank.id} datasets={presentation} {directSourceIdsByDataset} />
-</div>)}
diff --git a/site/components/SequencePlayer.astro b/site/components/SequencePlayer.astro
index 85f8a2b43db..d2c1c903d90 100644
--- a/site/components/SequencePlayer.astro
+++ b/site/components/SequencePlayer.astro
@@ -6,9 +6,10 @@ interface Props {
   objectId: string;
   dataset: Control;
   members: Control[];
-  focus: boolean;
+  /** The scene's own sequence can play; a drawn page's steps are links to its page. */
+  playable: boolean;
 }
-const { objectId, dataset, members, focus } = Astro.props;
+const { objectId, dataset, members, playable } = Astro.props;
 const index = members.findIndex(member => member.id === dataset.id);
 ---
 <!-- A sequence plays like a short video over its own map: one segment per step, filled up to the step on screen. -->
@@ -21,14 +22,13 @@ const index = members.findIndex(member => member.id === dataset.id);
       name="dataset"
       value={member.id}
       data-dataset-step={member.id}
-      data-focus-dataset={focus ? true : undefined}
       aria-current={position === index ? 'step' : undefined}
       aria-label={member.step!.label}
       title={member.step!.label}
     ><span class="object-sequence-segment-bar" aria-hidden="true"><span class="object-sequence-segment-fill"></span></span></button>)}
   </div>
   <div class="object-sequence-row">
-    {!focus && <button class="object-dataset-play" type="button" data-dataset-play={dataset.step!.group} disabled
+    {playable && <button class="object-dataset-play" type="button" data-dataset-play={dataset.step!.group} disabled
       aria-label="Play sequence" aria-pressed="false" title="Loop through this sequence">
       <span class="object-dataset-play-icon is-play"><MaterialSymbol name="play_arrow" /></span>
       <span class="object-dataset-play-icon is-pause"><MaterialSymbol name="pause" /></span>
diff --git a/site/dataset-response.mts b/site/dataset-response.mts
index 7e6c661ba3a..5cbdceeffbb 100644
--- a/site/dataset-response.mts
+++ b/site/dataset-response.mts
@@ -2,12 +2,11 @@ import { parseHTML } from 'linkedom';
 import { parseObjectDescriptor } from '@cssearth/objects';
 import { serializePreparedScene, createPreparedAssetResolver, loadPreparedCssObject, loadPreparedDataset,loadPreparedSurfaceFeature, surfaceFeatureCaption, publishPreparedNativeView, initialObjectSelection, publishDatasetSelection, sectionElements } from '@cssearth/renderer';
 import { parseSharedView, parsePreparedWorldCameraFrame, formatSharedView } from '@cssearth/renderer/navigation';
-import { renderNativeFocus } from './focus-response.mts';
 import { requiredElement, requiredSection } from './browser/browser-types.mts';
 import { PLACE_FEATURE_PREFIX } from './search/feature-search.mts';
 import { readSceneDatasetUrl } from './dataset-url.mts';
 import { preparedObjectUrl } from './prepared-object-path.mts';
-import { drawnPageFromUrl, preparedFocusFromUrl } from './navigation/navigation-scope.mts';
+import { drawnPageFromUrl } from './navigation/navigation-scope.mts';
 
 function region(html: string, name: string) {
   const marker = `<!--${name}:start-->`, start = html.indexOf(marker) + marker.length;
@@ -35,23 +34,21 @@ export async function renderDatasetResponse(html: string, url: URL, pageId: stri
   // A city link (`city-<id>`) is selected by the page on arrival; only surface features are drawn here.
   const featureIds = featureParams.filter(id => !id.startsWith(PLACE_FEATURE_PREFIX));
   const views = url.searchParams.getAll('v');
-  // The page of a subject the scene draws (a catalogue focus, an overview) always renders its scene and subject; a scene's
-  // own page changes only for what its query asks.
+  // The page of a level the scene draws always renders its scene and subject; a scene's own page changes only for what its
+  // query asks.
   if (!drawnPage && !url.searchParams.has('dataset') && !settingRequest && !featureIds.length && !views.length) return html;
   if (views.length > 1) throw new RangeError(`Invalid saved view: ${views.length} v parameters.`);
   let saved;
   try { saved = views.length ? parseSharedView(`v=${views[0]}`) : null; }
   catch { throw new UnreadableSavedView(views[0]!); }
-  // The page's scene: the page's own object, or the host of the catalogue focus the page is.
+  // The page's scene: the page's own object, or the host of the level the page is.
   const descriptorRegion = region(html, 'prepared-descriptor');
   const descriptor = parseObjectDescriptor(JSON.parse(requiredElement(descriptorRegion.document, 'script[data-prepared-descriptor]').textContent ?? ''));
-  const objectId = descriptor.id, focusId = preparedFocusFromUrl(url, objectId);
+  const objectId = descriptor.id;
   if ((pageId !== objectId && drawnPageFromUrl(url, objectId) !== pageId) || descriptor.prepared?.url !== 'prepared/object.json') {
-    throw new Error(`Prepared dataset descriptor identity drifted: page ${pageId}, scene ${objectId}, focus ${String(focusId)}.`);
+    throw new Error(`Prepared dataset descriptor identity drifted: page ${pageId}, scene ${objectId}.`);
   }
-  // On a catalogue focus's page `dataset` selects the focus's dataset; the scene keeps its own default.
   const dataset = readSceneDatasetUrl(url, objectId);
-  const focusing = focusId !== null;
   let datasetId = dataset.id ?? undefined;
   const shell = region(html, 'search-shell');
   const information = requiredSection(shell.document, '.object-information-panel');
@@ -113,23 +110,20 @@ export async function renderDatasetResponse(html: string, url: URL, pageId: stri
   if (activeDataset) stage.dataset.preparedDataset = activeDataset;
   stage.dataset.preparedSettings = JSON.stringify(settings);
   stage.innerHTML = selected.html;
-  if (saved || focusing) {
+  if (saved) {
     const frame = parsePreparedWorldCameraFrame(descriptor.properties.worldFrame);
     if (!frame) throw new RangeError('A saved view requires a prepared world frame.');
     try {
-      saved = await renderNativeFocus(shell.document, stage, url, definition, frame, saved, fetcher);
-      if (saved) {
-        publishPreparedNativeView(definition, initialObjectSelection(definition.controls, datasetId, settings), stage, frame, saved);
-        // The frame publisher writes the lighting and material frames of this camera by their prepared address: give
-        // each its published URL, as the scene's own textures have. A saved Moon link asked the site for
-        // /scenes/moon/lighting-2x-shadowless.webp and got 404 (2026-10-01).
-        const keys = new Map(definition.assets.entries.map(entry => [entry.url, entry.key]));
-        const styled = [...stage.querySelectorAll<HTMLElement>('[style*="/scenes/"]')];
-        const addresses = new Set(styled.flatMap(node => node.getAttribute('style')!.match(SCENE_ADDRESSES) ?? []));
-        await Promise.all([...addresses].map(address => published.ensure(keys.get(address) ?? '', address)));
-        for (const node of styled) node.setAttribute('style', node.getAttribute('style')!.replace(SCENE_ADDRESSES, address => published.url(address)));
-        stage.dataset.preparedView = formatSharedView(saved).slice(2);
-      }
+      publishPreparedNativeView(definition, initialObjectSelection(definition.controls, datasetId, settings), stage, frame, saved);
+      // The frame publisher writes the lighting and material frames of this camera by their prepared address: give
+      // each its published URL, as the scene's own textures have. A saved Moon link asked the site for
+      // /scenes/moon/lighting-2x-shadowless.webp and got 404 (2026-10-01).
+      const keys = new Map(definition.assets.entries.map(entry => [entry.url, entry.key]));
+      const styled = [...stage.querySelectorAll<HTMLElement>('[style*="/scenes/"]')];
+      const addresses = new Set(styled.flatMap(node => node.getAttribute('style')!.match(SCENE_ADDRESSES) ?? []));
+      await Promise.all([...addresses].map(address => published.ensure(keys.get(address) ?? '', address)));
+      for (const node of styled) node.setAttribute('style', node.getAttribute('style')!.replace(SCENE_ADDRESSES, address => published.url(address)));
+      stage.dataset.preparedView = formatSharedView(saved).slice(2);
     } catch (error) {
       // A view that reads but names no camera this scene can take (a rotation that is not orthonormal, a distance out
       // of range) is answered like one that does not read: the page without it, never a failed function. One such link
@@ -154,7 +148,7 @@ export async function renderDatasetResponse(html: string, url: URL, pageId: stri
     sectionElements(shell.document, '[data-dataset-details]').map(panel => ({ id: panel.dataset.datasetDetails!, panel })),
     sectionElements(information, '[data-dataset-context]'), new Set([activeDataset ?? null]),
     information.querySelector('.object-datasets'));
-  if (dataset.requested || featureIds.length || focusing) requiredElement(shell.document, '.object-sheet-handle').setAttribute('checked', '');
+  if (dataset.requested || featureIds.length) requiredElement(shell.document, '.object-sheet-handle').setAttribute('checked', '');
   for (const input of shell.document.querySelectorAll<HTMLInputElement>('.object-settings input[name]')) {
     if (Object.hasOwn(settings, input.name)) {
       if (input.type === 'checkbox') input.toggleAttribute('checked', settings[input.name] === true);
diff --git a/site/dataset-url.mts b/site/dataset-url.mts
index e18698324d8..b1825eff168 100644
--- a/site/dataset-url.mts
+++ b/site/dataset-url.mts
@@ -1,16 +1,7 @@
-import { parseDatasetDestination } from '@cssearth/objects/provenance';
-import { drawnPageFromUrl, preparedFocusFromUrl } from './navigation/navigation-scope.mts';
+import { drawnPageFromUrl } from './navigation/navigation-scope.mts';
 
-/** Prepared source links select their focused object directly on the shared camera of scene `sceneId`. */
-export function isFocusDatasetUrl(url: URL, sceneId: string): boolean {
-  const objectId = preparedFocusFromUrl(url, sceneId), datasetId = url.searchParams.get('dataset');
-  if (!objectId || !datasetId) return false;
-  try { parseDatasetDestination(`${url.pathname}${url.search}${url.hash}`, objectId, datasetId); return true; }
-  catch { return false; }
-}
-
-/** The mounted scene's own dataset. On the page of a subject the scene draws (a catalogue focus, an overview) the scene
- * reads none: that page's `dataset` is its subject's own dataset (a focus's, or an overview's, page-datasets.mts). */
+/** The mounted scene's own dataset. On the page of a level the scene draws the scene reads none: that page's `dataset` is
+ * the level's own (page-datasets.mts). */
 export function readSceneDatasetUrl(url: URL, sceneId: string): { requested: boolean; id: string | null } {
   return drawnPageFromUrl(url, sceneId) === null ? readDatasetUrl(url) : { requested: false, id: null };
 }
diff --git a/site/focus-catalog-data.mts b/site/dot-catalogue-data.mts
similarity index 79%
rename from site/focus-catalog-data.mts
rename to site/dot-catalogue-data.mts
index f869d7b1ad5..d757501dad6 100644
--- a/site/focus-catalog-data.mts
+++ b/site/dot-catalogue-data.mts
@@ -3,19 +3,15 @@
 import { parsePreparedGalaxyCatalog, parsePreparedClusterCatalog, parsePreparedNebulaCatalog } from '@cssearth/catalog';
 import galaxies from '../src/objects/local-group/prepared/catalogue.json' with { type: 'json' };
 import clusters from '../src/objects/galaxy-clusters/prepared/catalogue.json' with { type: 'json' };
-import { focusSourceDocumentation } from './source-documentation.mts';
 
 const parts = Object.values(import.meta.glob('../src/objects/*/source/nebula.json', { eager: true, import: 'default' })).map(parsePreparedNebulaCatalog);
 const nebulae = parsePreparedNebulaCatalog({ schema: 'cssearth-nebula-catalog@1', frame: galaxies.frame,
   sources: [...new Map(parts.flatMap(part => part.sources).map(source => [source.id, source])).values()],
   objects: parts.flatMap(part => part.objects) });
-export const FOCUS_CATALOG_DATA = [
+export const DOT_CATALOGUE_DATA = [
   { id: 'galaxies', data: parsePreparedGalaxyCatalog(galaxies) },
   { id: 'clusters', data: parsePreparedClusterCatalog(clusters) },
   { id: 'nebulae', data: nebulae },
 ].map(({ id, data }) => {
   return { id, data, text: JSON.stringify(data) };
 });
-
-export const FOCUS_SOURCE_DOCUMENTS = new Map(FOCUS_CATALOG_DATA.flatMap(catalog => catalog.data.objects
-  .map(object => [object.id, focusSourceDocumentation(object, catalog.id)] as const)));
diff --git a/site/dot-catalogues.mts b/site/dot-catalogues.mts
new file mode 100644
index 00000000000..464414a1cd3
--- /dev/null
+++ b/site/dot-catalogues.mts
@@ -0,0 +1,14 @@
+import { parsePreparedGalaxyCatalog, parsePreparedClusterCatalog, parsePreparedNebulaCatalog } from '@cssearth/catalog';
+
+/** The three spatial catalogues the world draws as dots, served at `/catalogues/<id>.json` (`site/pages/catalogues/[id].json.ts`). */
+export async function loadDotCatalogues(origin: string, fetcher: typeof fetch = fetch, signal?: AbortSignal) {
+  const rows = await Promise.all((['galaxies', 'clusters', 'nebulae'] as const).map(async id => {
+    const url = new URL(`/catalogues/${id}.json`, origin);
+    const response = await fetcher(url, { redirect: 'error', signal: signal ?? AbortSignal.timeout(15_000) });
+    if (!response.ok) throw new Error(`Prepared catalogue ${url.pathname} failed: HTTP ${response.status}.`);
+    return { id, data: await response.json() as unknown };
+  }));
+  return { galaxies: parsePreparedGalaxyCatalog(rows.find(row => row.id === 'galaxies')?.data),
+    clusters: parsePreparedClusterCatalog(rows.find(row => row.id === 'clusters')?.data),
+    nebulae: parsePreparedNebulaCatalog(rows.find(row => row.id === 'nebulae')?.data) };
+}
diff --git a/site/focus-catalog.mts b/site/focus-catalog.mts
deleted file mode 100644
index ee8ff38d9e3..00000000000
--- a/site/focus-catalog.mts
+++ /dev/null
@@ -1,57 +0,0 @@
-import { parsePreparedGalaxyCatalog, parsePreparedClusterCatalog, parsePreparedNebulaCatalog } from '@cssearth/catalog';
-import { isRecord } from '@cssearth/core';
-import type { PreparedCatalogObject, PreparedGalaxyCatalog, PreparedClusterCatalog, PreparedNebulaCatalog } from '@cssearth/catalog';
-
-type PreparedFocusCatalog = PreparedGalaxyCatalog | PreparedClusterCatalog | PreparedNebulaCatalog;
-
-/** Keep the selected record and its complete physical-host chain in a native-navigation fragment. */
-export function initialFocusCatalog(catalog: PreparedFocusCatalog, selected: PreparedCatalogObject): PreparedFocusCatalog {
-  if (!catalog.objects.some(object => object === selected || object.id === selected.id)) throw new TypeError('Initial focus is outside its catalogue.');
-  if (catalog.schema !== 'cssearth-galaxy-catalog@1') {
-    const value = { ...catalog, objects: [selected] };
-    return catalog.schema === 'cssearth-cluster-catalog@1' ? parsePreparedClusterCatalog(value) : parsePreparedNebulaCatalog(value);
-  }
-  const positioned = new Map(catalog.objects.map(object => [object.id, object]));
-  const unpositioned = new Map((catalog.unpositionedHosts ?? []).map(object => [object.id, object]));
-  const included = new Set<string>();
-  let current: { readonly id: string; readonly hostId?: string } | undefined = positioned.get(selected.id);
-  while (current) {
-    if (included.has(current.id)) throw new TypeError(`Cyclic physical host: ${current.id}.`);
-    included.add(current.id);
-    if (current.hostId === undefined) break;
-    const hostId = current.hostId;
-    current = positioned.get(hostId) ?? unpositioned.get(hostId);
-    if (!current) throw new TypeError(`Unknown physical host: ${hostId}.`);
-  }
-  return parsePreparedGalaxyCatalog({ ...catalog,
-    objects: catalog.objects.filter(object => included.has(object.id)),
-    unpositionedHosts: (catalog.unpositionedHosts ?? []).filter(object => included.has(object.id)),
-  });
-}
-
-export function readInitialFocus(document: Document): PreparedCatalogObject | null {
-  const script = document.querySelector('script[data-initial-focus]');
-  if (!script) return null;
-  const selectedId = script.getAttribute('data-initial-focus');
-  if (!selectedId || !/^[a-z0-9][a-z0-9:._+-]{0,127}$/iu.test(selectedId)) throw new TypeError('Initial focus identity is invalid.');
-  const value: unknown = JSON.parse(script.textContent ?? '');
-  if (!isRecord(value)) throw new TypeError('Initial focus is invalid.');
-  const catalog = value.schema === 'cssearth-nebula-catalog@1' ? parsePreparedNebulaCatalog(value)
-    : value.schema === 'cssearth-cluster-catalog@1' ? parsePreparedClusterCatalog(value) : parsePreparedGalaxyCatalog(value);
-  const selected = catalog.objects.find(object => object.id === selectedId);
-  if (!selected) throw new TypeError('Initial focus identity names no prepared record.');
-  return selected;
-}
-
-/** The three prepared focus catalogues, served at `/catalogues/<id>.json` (`site/pages/catalogues/[id].json.ts`). */
-export async function loadFocusCatalogs(origin: string, fetcher: typeof fetch = fetch, signal?: AbortSignal) {
-  const rows = await Promise.all((['galaxies', 'clusters', 'nebulae'] as const).map(async id => {
-    const url = new URL(`/catalogues/${id}.json`, origin);
-    const response = await fetcher(url, { redirect: 'error', signal: signal ?? AbortSignal.timeout(15_000) });
-    if (!response.ok) throw new Error(`Prepared focus catalogue ${url.pathname} failed: HTTP ${response.status}.`);
-    return { id, data: await response.json() as unknown };
-  }));
-  return { galaxies: parsePreparedGalaxyCatalog(rows.find(row => row.id === 'galaxies')?.data),
-    clusters: parsePreparedClusterCatalog(rows.find(row => row.id === 'clusters')?.data),
-    nebulae: parsePreparedNebulaCatalog(rows.find(row => row.id === 'nebulae')?.data) };
-}
diff --git a/site/focus-fragment.mts b/site/focus-fragment.mts
deleted file mode 100644
index 65ef2a1f38d..00000000000
--- a/site/focus-fragment.mts
+++ /dev/null
@@ -1,33 +0,0 @@
-import { sectionElements } from '@cssearth/renderer';
-/**
- * The prepared focus card's dataset banks (every deep-sky volume and image-layer
- * bank, with their controls, context panels and resource maps) are the same on
- * every object page and are needed only once a focus is selected. They render
- * once, at `site/pages/focus-fragment/`; each object page carries two empty
- * `[data-focus-banks-slot]` placeholders. The browser and the no-JS focus
- * response fetch that page and splice its bank groups into the placeholders.
- */
-export const FOCUS_FRAGMENT_URL = '/focus-fragment/';
-
-/** True while the card still holds the empty placeholders. */
-export function focusBanksPending(root: ParentNode): boolean {
-  return sectionElements(root, '[data-focus-banks-slot]').length > 0;
-}
-
-export async function fetchFocusFragment(fetchUrl: (url: string) => Promise<Response>): Promise<string> {
-  const response = await fetchUrl(FOCUS_FRAGMENT_URL);
-  if (!response.ok) throw new Error(`Focus fragment ${FOCUS_FRAGMENT_URL} failed: HTTP ${response.status}.`);
-  return response.text();
-}
-
-/** Replace each placeholder with the matching bank group of a parsed fragment. */
-export function spliceFocusBanks(root: HTMLElement, fragment: ParentNode): void {
-  const document = root.ownerDocument;
-  // A slot can sit in a closed tab's detached panel (tab-panels.mts).
-  for (const slot of sectionElements(root, '[data-focus-banks-slot]')) {
-    const name = slot.dataset.focusBanksSlot;
-    const group = fragment.querySelector<HTMLElement>(`[data-focus-banks="${name}"]`);
-    if (!group) throw new Error(`Focus fragment ${FOCUS_FRAGMENT_URL} has no "${name}" bank group.`);
-    slot.replaceWith(...[...group.childNodes].map(node => document.importNode(node, true)));
-  }
-}
diff --git a/site/focus-response.mts b/site/focus-response.mts
deleted file mode 100644
index 8c3378f07c0..00000000000
--- a/site/focus-response.mts
+++ /dev/null
@@ -1,95 +0,0 @@
-import { syncTabPanels } from './tab-panels.mts';
-import { parseHTML } from 'linkedom';
-import { parseObjectDescriptor } from '@cssearth/objects';
-import { sectionElements } from '@cssearth/renderer';
-import { loadPreparedVolumeDatasets, createPreparedVolumeDatasets, imageFocusDatasets } from '@cssearth/renderer/universe';
-import { worldCameraFromCenteredPresentation, presentWorldCamera, createWorldSelectionTarget, savedWorldCamera } from '@cssearth/renderer/navigation';
-import type { PreparedWorldCameraFrame, SharedView } from '@cssearth/renderer/navigation';
-import type { ObjectRuntimeDefinition } from '@cssearth/renderer/runtime/object-runtime-types.ts';
-import { initialFocusCatalog, loadFocusCatalogs } from './focus-catalog.mts';
-import { requiredElement } from './browser/browser-types.mts';
-import { isRecord } from '@cssearth/core';
-import { createPreparedFocusCard } from './prepared-focus-card.mts';
-import { fetchFocusFragment, focusBanksPending, spliceFocusBanks } from './focus-fragment.mts';
-import { readPreparedFocusSelection } from './navigation/navigation-scope.mts';
-import { preparedFocusObjectId, resolvePreparedFocus, preparedFocusCitations, resolvePreparedFocusDataset } from './prepared-focus.mts';
-import type { PreparedFocusPresentation } from './prepared-focus.mts';
-import { PREPARED_WORLD_PRESENTATION } from './prepared-world-presentation.mts';
-
-/** Select a prepared context bank inside the existing scene and shared card. The shared selection
- * presentation shows the card and dataset-response.mts opens the sheet, as for every other selection. */
-export async function renderNativeFocus(shell: Document, stage: HTMLElement, url: URL, definition: ObjectRuntimeDefinition,
-  frame: PreparedWorldCameraFrame, saved: SharedView | null, fetcher: typeof fetch): Promise<SharedView | null> {
-  const selection = readPreparedFocusSelection(url, definition.id);
-  if (!selection) return saved;
-  const catalogs = await loadFocusCatalogs(url.origin, fetcher);
-  const catalog = [catalogs.galaxies, catalogs.clusters, catalogs.nebulae].find(catalog => catalog.objects.some(record => record.id === selection.id));
-  const selected = catalog?.objects.find(record => record.id === selection.id);
-  if (!catalog || !selected) throw new RangeError('Prepared focus is unavailable.');
-  const objectId = preparedFocusObjectId(selected);
-  const root = sectionElements(shell, '[data-prepared-focus-card]')[0];
-  if (!root) throw new Error('Prepared focus card is missing.');
-  if (focusBanksPending(root)) {
-    const html = await fetchFocusFragment(path => fetcher(new URL(path, url.origin), { redirect: 'error', signal: AbortSignal.timeout(15_000) }));
-    spliceFocusBanks(root, parseHTML(html).document);
-  }
-  const unavailable = objectId !== undefined && (root.querySelector<HTMLElement>('[data-focus-unavailable]')?.dataset.unavailableObjects?.split(' ') ?? []).includes(objectId);
-  const bank = unavailable ? undefined : sectionElements(root, '[data-focus-dataset-bank]').find(bank => bank.dataset.focusDatasetBank === objectId);
-  let presentation: PreparedFocusPresentation | undefined;
-  if (bank) {
-    const input: unknown = JSON.parse(requiredElement(bank, 'script[data-focus-resources]').textContent ?? '');
-    if (!isRecord(input) || !isRecord(input.resources)) throw new TypeError('Prepared focus resources are missing.');
-    const descriptor = parseObjectDescriptor(input.descriptor), resources = input.resources;
-    if (descriptor.id !== objectId) throw new TypeError('Prepared focus resource identity differs.');
-    // Image-layer galaxies such as M31 are already drawn by the world context; only volume banks mount focus datasets.
-    if (descriptor.type === 'image-layer-bank') {
-      const datasets = imageFocusDatasets(descriptor.id);
-      resolvePreparedFocusDataset(selection.dataset, datasets);
-      presentation = { ...datasets, selectDataset() {} };
-    } else {
-      const resolve = (path: string): string => {
-        const value = resources[path];
-        if (typeof value !== 'string' || !value) throw new TypeError('Prepared focus resource is undeclared.');
-        return value;
-      };
-      const payload = await loadPreparedVolumeDatasets(descriptor, { read: async path => {
-        const response = await fetcher(new URL(resolve(path), url.origin), { redirect: 'error', signal: AbortSignal.timeout(15_000) });
-        if (!response.ok) throw new Error('Prepared focus bank could not load.');
-        return response.arrayBuffer();
-      } });
-      const datasetId = resolvePreparedFocusDataset(selection.dataset, payload)!;
-      const focus = resolvePreparedFocus(selected, payload.framingRadiusUnits * payload.datasets[0].volume.frame.metersPerUnit,
-        PREPARED_WORLD_PRESENTATION.galaxies);
-      const focalCss = definition.camera.projection.cssPerspective;
-      const viewport = { focalPixels: 1000, widthPixels: 1e9, heightPixels: 1e9, principalOffsetPixels: [0, 0] as const };
-      const world = saved ? savedWorldCamera(saved, frame, viewport) : createWorldSelectionTarget(
-        worldCameraFromCenteredPresentation({ rotation: [1, 0, 0, 0, 1, 0, 0, 0, 1], distanceUnits: frame.bodyRadiusM / frame.metersPerUnit * 4 }, frame, viewport),
-        { ...frame, originM: focus.positionM, bodyRadiusM: focus.framingRadiusM },
-        { ...viewport, framingRadiusPixels: 250 });
-      if (!saved) {
-        const view = presentWorldCamera(world, frame, viewport);
-        saved = { preparedEpochJdTt: frame.epochJdTt, camera: { pose: { schema: 'cssearth-camera-pose@2', scene: view.sceneMatrix },
-          distanceKilometers: view.distanceM / 1000,
-          bodyCenterKilometers: [view.bodyCenterUnits[0] * frame.metersPerUnit / 1000,
-            view.bodyCenterUnits[1] * frame.metersPerUnit / 1000, view.bodyCenterUnits[2] * frame.metersPerUnit / 1000] },
-          playback: { speed: 1, motionRequested: false, times: [...definition.motion ?? [], ...definition.animations.filter(plan => plan.mode === 'motion')].map(() => 0) } };
-      }
-      const end = stage.ownerDocument.createElement('span'); end.hidden = true; stage.append(end);
-      const runtime = createPreparedVolumeDatasets({ payload, resolveResource: path => resolve(`prepared/${path}`) }).mount({ host: stage, before: end, nativeFocalCss: focalCss });
-      runtime.selectDataset(datasetId); runtime.publish({ world, viewport });
-      end.remove();
-      presentation = { ...runtime.state(), selectDataset() {} };
-    }
-  } else resolvePreparedFocusDataset(selection.dataset, null, unavailable);
-  const card = createPreparedFocusCard(root, id => {
-    for (const radio of root.querySelectorAll<HTMLInputElement>(':scope > .object-native-tabs > input')) radio.toggleAttribute('checked', radio.value === id);
-  });
-  card.set(selected, preparedFocusCitations(selected, catalog.sources), presentation);
-  card.destroy();
-  syncTabPanels(root);
-  // A page the build already rendered its focus into answers a query again: one initial record, the latest.
-  for (const previous of root.querySelectorAll(':scope > script[data-initial-focus]')) previous.remove();
-  const initial = shell.createElement('script'); initial.type = 'application/json'; initial.dataset.initialFocus = selected.id;
-  initial.textContent = JSON.stringify(initialFocusCatalog(catalog, selected)).replace(/</gu, '\\u003c'); root.append(initial);
-  return saved;
-}
diff --git a/site/initial-shell-context.mts b/site/initial-shell-context.mts
index f399ebb80c8..a6b994749cc 100644
--- a/site/initial-shell-context.mts
+++ b/site/initial-shell-context.mts
@@ -3,9 +3,9 @@ export function deferInitialShellContext(document: Document, url: string, sceneR
   const location = new URL(url), query = location.searchParams;
   // ?embed shows only the scene, for the wiki's object viewer; the shell still mounts, hidden.
   if (query.has('embed')) document.documentElement.dataset.embed = '';
-  // A catalogue focus's page draws this scene under its own path.
-  const focusPage = location.pathname !== '/' && location.pathname !== sceneRoute;
-  if (focusPage || ['overview', 'view', 'dataset', 'feature', 'v'].some(key => query.has(key))) {
+  // A level's page draws this scene under its own path.
+  const levelPage = location.pathname !== '/' && location.pathname !== sceneRoute;
+  if (levelPage || ['overview', 'view', 'dataset', 'feature', 'v'].some(key => query.has(key))) {
     document.documentElement.dataset.shellContext = 'pending';
   }
 }
diff --git a/site/layouts/ObjectLayout.astro b/site/layouts/ObjectLayout.astro
index 34199f224c1..d35398be15c 100644
--- a/site/layouts/ObjectLayout.astro
+++ b/site/layouts/ObjectLayout.astro
@@ -7,8 +7,8 @@ import { initialShellContextBootstrap } from '../initial-shell-context.mts';
 import { startupRequestsBootstrap } from '../startup-requests.mts';
 import { SYSTEM_VIEW_HOSTS } from '../system-framing.mts';
 import { resolveBuildSceneAddress } from '../asset-origin.mts';
-import { SCENE_OBJECTS, requireObject, requireSceneObject } from "../objects.mts";
-import { breadcrumbJsonLd, focusSeo, homeSeo, objectSeo, websiteJsonLd } from "../seo.mts";
+import { SCENE_OBJECTS, requirePage, requireSceneObject } from "../objects.mts";
+import { breadcrumbJsonLd, homeSeo, objectSeo, websiteJsonLd } from "../seo.mts";
 import { pageTrail } from "../seo-trail.mts";
 import { availableSocialImages, DEFAULT_SOCIAL_IMAGE_ID } from "../social-images.mts";
 import "./cubic-sky.css";
@@ -33,7 +33,7 @@ const worldCamera = worldCameraOf(worldSummary);
 
 interface Props {
   objectId: string;
-  /** The object the page is: `objectId`, or a catalogue focus its scene draws. */
+  /** What the page is: `objectId`, or a level of the zoom ladder its scene shows. */
   pageId?: string;
   navigation?: boolean;
   scene?: PreparedSceneMarkup & Pick<Awaited<ReturnType<typeof loadPreparedSceneMarkup>>, 'descriptor' | 'coverPlan'>;
@@ -48,8 +48,8 @@ const tabStyles = informationTabStyles(Astro.locals, objectUi);
 const objectRecord = requireSceneObject(objectId);
 const startup = !navigation && scene && objectRecord.discovery?.arrival?.billboard ? objectRecord.discovery : undefined;
 const startupImage = startup?.arrival?.billboard ? await resolveBuildSceneAddress(startup.arrival.billboard.url) : undefined;
-// A page that is its own scene places its arrival photograph from the HTML (startup-cover.mts); a catalogue focus page
-// drawn by another scene leaves it to that scene's startup.
+// A page that is its own scene places its arrival photograph from the HTML (startup-cover.mts); a level's page, drawn by
+// the world host's scene, leaves it to that scene's startup.
 const startupCover = startup?.arrival?.billboard && scene?.coverPlan && pageId === objectId ? {
   plan: scene.coverPlan, mobileQuery: MOBILE_VIEWPORT_QUERY,
   billboard: { size: startup.arrival.billboard.size, focalPixels: startup.arrival.billboard.focalPixels, distanceM: startup.arrival.billboard.distanceM },
@@ -60,8 +60,8 @@ const startupCover = startup?.arrival?.billboard && scene?.coverPlan && pageId =
 // connection, 2026-09-30). An image preload is not used: Safari downloaded the photograph twice with one.
 const assetPreconnect = startupImage && /^https?:\/\//.test(startupImage) ? new URL(startupImage).origin : undefined;
 const seoOptions = { socialImages: availableSocialImages(SCENE_OBJECTS), defaultSocialImageId: DEFAULT_SOCIAL_IMAGE_ID };
-const pageRecord = requireObject(pageId);
-const pageSeo = pageRecord.kind === 'prepared-focus' ? focusSeo(pageRecord, seoOptions) : objectSeo(pageRecord, seoOptions);
+const pageRecord = requirePage(pageId);
+const pageSeo = objectSeo(pageRecord, seoOptions);
 const seo = home ? homeSeo(pageSeo) : pageSeo;
 const structuredData = JSON.stringify(home ? websiteJsonLd() : breadcrumbJsonLd(pageTrail(pageRecord))).replace(/</g, '\\u003c');
 ---
diff --git a/site/navigation/navigation-content.mts b/site/navigation/navigation-content.mts
index 182e5230a96..ffce054907b 100644
--- a/site/navigation/navigation-content.mts
+++ b/site/navigation/navigation-content.mts
@@ -13,9 +13,9 @@ export interface NavigationContent {
 }
 export type NavigationContentLoader = (object: ObjectEntry, options: { signal: AbortSignal }) => Promise<NavigationContent>;
 
-export function objectLinkIsCurrent(anchor: Pick<HTMLAnchorElement, 'origin' | 'pathname' | 'search' | 'hasAttribute'>,
+export function objectLinkIsCurrent(anchor: Pick<HTMLAnchorElement, 'origin' | 'pathname' | 'search'>,
   origin: string, route: string) {
-  if (anchor.hasAttribute('data-prepared-focus-id') || anchor.origin !== origin || anchor.pathname !== route) return false;
+  if (anchor.origin !== origin || anchor.pathname !== route) return false;
   const query = new URLSearchParams(anchor.search);
   return !query.has('overview');
 }
diff --git a/site/navigation/navigation-fragments.mts b/site/navigation/navigation-fragments.mts
index 66255864e81..c08c16f997d 100644
--- a/site/navigation/navigation-fragments.mts
+++ b/site/navigation/navigation-fragments.mts
@@ -154,7 +154,6 @@ export function bindNavigationIntent({ documentTarget, windowTarget, navigable,
   const linked = (event: Event) => {
     const anchor = event.target instanceof windowTarget.Element ? event.target.closest('a[href]') : null;
     if (!(anchor instanceof windowTarget.HTMLAnchorElement) || anchor.origin !== windowTarget.location.origin) return null;
-    if (anchor.hasAttribute('data-prepared-focus-id')) return null;
     const id = anchor.pathname === '/' ? undefined : objectIdAtPath(anchor.pathname);
     // An overview keeps the mounted scene (navigation-scope.mts): there is nothing to prefetch.
     return isOverviewPage(id) ? null : id ?? null;
diff --git a/site/navigation/navigation-history.mts b/site/navigation/navigation-history.mts
index 1b647f5eb7e..599554dd606 100644
--- a/site/navigation/navigation-history.mts
+++ b/site/navigation/navigation-history.mts
@@ -193,12 +193,6 @@ export function bindNavigationLinks({ documentTarget, windowTarget, navigable, n
     if (url.origin !== windowTarget.location.origin) return;
     // An object route is `/<id>/`; the front page's `/` is left to the browser, as before.
     const id = url.pathname === '/' ? undefined : objectIdAtPath(url.pathname);
-    // A catalogue focus link selects its subject in place: the mounted scene draws every focus.
-    if (id && id === anchor.getAttribute('data-prepared-focus-id') && !url.searchParams.has('v')) {
-      event.preventDefault();
-      Promise.resolve(navigate(id, { kind: 'focus', id })).catch(onError);
-      return;
-    }
     if (!id || !available(id)) return;
     event.preventDefault();
     Promise.resolve(navigate(id, { kind: 'link', url: url.href })).catch(onError);
diff --git a/site/navigation/navigation-request.mts b/site/navigation/navigation-request.mts
index f8a73648c73..c30902bd2a9 100644
--- a/site/navigation/navigation-request.mts
+++ b/site/navigation/navigation-request.mts
@@ -4,8 +4,8 @@ import type { ShellCamera } from '../browser/browser-types.mts';
 import type { ObjectEntry } from '../objects.mts';
 import type { OverviewScope } from '../overview-context.mts';
 import type { createPreparedWorldNavigation } from '../prepared-world-navigation.mts';
-import { isFocusDatasetUrl, withDataset } from '../dataset-url.mts';
-import { withOverviewScope, withPreparedFocus, withSatelliteSystemView } from './navigation-scope.mts';
+import { withDataset } from '../dataset-url.mts';
+import { withOverviewScope, withSatelliteSystemView } from './navigation-scope.mts';
 import { systemById, type SystemObjects } from '../object-systems.mts';
 import { satelliteSystemByHost } from '../satellite-systems.mts';
 import { selectionContext, selectionKey, selectionTargetFromUrl, type SelectionTarget, type SceneSubject } from '../scene/scene-selection.mts';
@@ -14,13 +14,11 @@ export type NavigationHistory = { history: 'push' | 'replace' } | { history: 'po
 export type NavigationIntent =
   | { kind: 'object' }
   | { kind: 'satellite-system'; camera: 'frame' | 'preserve' }
-  | { kind: 'focus'; id: string }
   | { kind: 'feature'; id: string | null }
   | { kind: 'link'; url: string }
   | { kind: 'history'; url: string; history: NavigationHistory }
   | { kind: 'overview'; scope: OverviewScope; camera: 'frame' | 'preserve' };
 export type NavigationCamera =
-  | { kind: 'focus' }
   | { kind: 'surface' }
   | { kind: 'restore'; animate: boolean }
   | { kind: 'preserve' }
@@ -39,7 +37,7 @@ export interface ResolvedNavigation {
 /** Interpret destination intent here; dataset and camera owners still validate their payloads when applying them. */
 export function readNavigationSelection(url: URL, objectId: string, objects: SystemObjects) {
   return { subject: selectionTargetFromUrl(url, objectId, objects), savedView: url.searchParams.has('v'),
-    dataset: url.searchParams.has('dataset') || isFocusDatasetUrl(url, objectId), feature: url.searchParams.get('feature') };
+    dataset: url.searchParams.has('dataset'), feature: url.searchParams.get('feature') };
 }
 
 /** Resolve once, before cancellation: loading, preview, flight and arrival consume the same destination. */
@@ -81,15 +79,9 @@ export function resolveNavigation(intent: NavigationIntent, { object, objects, n
   const center = overviewTarget?.world ?? familyTarget
     ?? (firstHostSelection && !family ? navigation.systemTarget(targetRequest) : null)
     ?? (firstHostSelection ? navigation.centerTarget(targetRequest) : null);
-  if (intent.kind === 'focus') {
-    url.pathname = object.route;
-    url = withPreparedFocus(url, object.id, intent.id, null);
-    url.searchParams.delete('v');
-    // A focus picked from search or a list is a destination like any other: it adds a history entry, so Back returns to
-    // the subject before it (M 33, then LMC, then Back left the site, 2026-10-01). Picking the current one again replaces.
-  } else if (!linked) {
+  if (!linked) {
     url.pathname = object.route; url.searchParams.delete('v'); url.searchParams.delete('feature');
-    url = withDataset(withPreparedFocus(url, object.id, null, null), null);
+    url = withDataset(url, null);
     withOverviewScope(url, object.id, intent.kind === 'overview' ? intent.scope
       : center && intent.kind === 'object' && systemById(objects, object.id) ? 'system' : null);
     withSatelliteSystemView(url, intent.kind === 'satellite-system' || intent.kind === 'object' && familyTarget !== null);
@@ -103,7 +95,7 @@ export function resolveNavigation(intent: NavigationIntent, { object, objects, n
     || intent.kind === 'satellite-system' && intent.camera === 'preserve'
     || current.reuseScene && (linked && selection.dataset || interruptedFlight);
   const camera: NavigationCamera = current.reuseScene && (intent.kind === 'feature' || selection.feature !== null)
-    ? { kind: 'surface' } : intent.kind === 'focus' ? { kind: 'focus' } : restore ? { kind: 'restore', animate: history.history === 'pop' }
+    ? { kind: 'surface' } : restore ? { kind: 'restore', animate: history.history === 'pop' }
     : keepCamera ? { kind: 'preserve' }
     : { kind: 'frame', framing: center ? 'center' : 'detail', world: center, focusPositionM: overviewTarget?.focusPositionM ?? null };
   if (current.reuseScene && !restore) {
diff --git a/site/navigation/navigation-scope.mts b/site/navigation/navigation-scope.mts
index a08fb64d429..e3039430e15 100644
--- a/site/navigation/navigation-scope.mts
+++ b/site/navigation/navigation-scope.mts
@@ -1,22 +1,22 @@
 import { objectIdAtPath } from '../root-object.mts';
-import { knownObject } from '../object-directory.mts';
+import { knownLevel } from '../object-directory.mts';
 import type { OverviewScope } from '../overview-context.mts';
 import { SOLAR_SYSTEM_ID } from '../object-systems.mts';
 
-/** Every page is `/<id>/`. A page is either a scene (a body, a star) or something the shared world draws around the
- * mounted scene: a catalogue subject (a galaxy, a cluster, a nebula) or an overview (the Milky Way, the Local Group, the
- * nearby and the observable universe). All three are entries of the one registry (`OBJECTS`), told apart by their kind.
- * The second kind keeps whatever scene is mounted, and a page of it opened cold mounts its host, the world's. This module
+/** Every page is `/<id>/`. A page is either an object's own scene (a body, a star, a galaxy, a nebula, a cluster) or a level
+ * of the zoom ladder the shared world draws around the mounted scene (the Milky Way, the Local Group, the nearby and the
+ * observable universe). An object is an entry of the one registry (`OBJECTS`); a level is one of the ladder's few views
+ * (`OVERVIEWS`). A level keeps whatever scene is mounted, and
+ * its page opened cold mounts its host, the world's. This module
  * owns reading and writing those paths: every writer goes through it. The system overview of a star is the only overview
  * without an id of its own; it is its scene page's `overview=system`. */
 
-/** The scene a drawn page mounts when it is opened cold: the world's host, the star every catalogue subject and overview
- * is placed from (site/build/prepare/prepare-catalog.mts gives each catalogue subject the same host). */
+/** The scene a level's page mounts when it is opened cold: the world's host. */
 export const WORLD_HOST_ID = SOLAR_SYSTEM_ID;
 
 /** The overviews that are pages: the registry's overview entries, every level of the zoom ladder above a star's system. */
 export type OverviewPageId = Exclude<OverviewScope, 'system'>;
-export const isOverviewPage = (id: string | null | undefined): id is OverviewPageId => typeof id === 'string' && knownObject(id)?.kind === 'overview';
+export const isOverviewPage = (id: string | null | undefined): id is OverviewPageId => knownLevel(id) !== undefined;
 
 /** The page a URL names when it is something the mounted scene `sceneId` draws, not the scene itself; null on the
  * scene's own page. The URL is the selection from the moment it is named, before any bank has loaded. */
@@ -25,13 +25,7 @@ export function drawnPageFromUrl(url: string | URL, sceneId: string) {
   return id !== undefined && id !== sceneId ? id : null;
 }
 
-/** The catalogue focus a URL names on the page of scene `sceneId`: a drawn page that is not an overview. */
-export function preparedFocusFromUrl(url: string | URL, sceneId: string) {
-  const id = drawnPageFromUrl(url, sceneId);
-  return isOverviewPage(id) ? null : id;
-}
-
-/** The page of drawn subject `id` (a catalogue focus or an overview), or of scene `sceneId` when `id` is null. The front
+/** The page of level `id`, or of scene `sceneId` when `id` is null. The front
  * page (`/`) already names its scene and keeps its path. A page's `dataset` and `feature` are its own: moving to another
  * page drops them, so a drawn subject's page never carries the scene's (opened cold it mounts the world's host, which
  * would read them as its own), and staying on a page keeps its own (an overview's dataset, page-datasets.mts). */
@@ -52,16 +46,7 @@ export function withPageDataset(url: URL, page: string, dataset: string): URL {
   return url;
 }
 
-/** Parse a selection at either entry point: the focus its page names, and the dataset its `dataset` selects, as on any page. */
-export function readPreparedFocusSelection(url: URL, sceneId: string): { id: string; dataset: string | null } | null {
-  const id = preparedFocusFromUrl(url, sceneId);
-  if (id === null) return null;
-  const datasets = url.searchParams.getAll('dataset');
-  if (datasets.length > 1) throw new RangeError('A saved view may have only one prepared focus dataset.');
-  return { id, dataset: datasets[0] ?? null };
-}
-
-/** The overview a URL names: its page's, or on a scene's page `overview=system`. A catalogue focus's page has none. */
+/** The overview a URL names: its page's, or on a scene's page `overview=system`. */
 export function overviewScopeFromUrl(url: string | URL, sceneId: string) {
   const page = drawnPageFromUrl(url, sceneId);
   if (isOverviewPage(page)) return page;
@@ -83,19 +68,6 @@ export function withSatelliteSystemView(url: URL, selected: boolean): URL {
   return url;
 }
 
-/** Selects the named catalogue focus and its dataset on the page of scene `sceneId`, or clears it back to that scene's
- * page, replacing any overview it supersedes. A focus's page selects its dataset with `dataset`, like every page, so the
- * scene's own dataset never crosses into it or back. */
-export function withPreparedFocus(url: URL, sceneId: string, id: string | null, dataset: string | null): URL {
-  const focused = preparedFocusFromUrl(url, sceneId) !== null;
-  // Clearing a focus leaves an overview's page to withOverviewScope, which keeps it or returns to the scene.
-  if (id !== null || !isOverviewPage(objectIdAtPath(url.pathname))) withPage(url, sceneId, id);
-  if (id !== null && dataset) url.searchParams.set('dataset', dataset);
-  else if (id !== null || focused) url.searchParams.delete('dataset');
-  if (id) { url.searchParams.delete('overview'); url.searchParams.delete('view'); }
-  return url;
-}
-
 /** The page an overview selected on scene `sceneId` is, or null when it is the scene page's `overview=system`. An
  * overview's page is the world host's scene; another star's scene zoomed out past its system stays that star's system
  * overview in its URL, so a reload reopens the scene it shows and the zoom recomputes the scope from there. */
@@ -112,7 +84,7 @@ export function withOverviewScope(url: URL, sceneId: string, requested: Overview
     url.searchParams.delete('view');
     return url;
   }
-  // Leaving an overview's page returns to the scene's; a catalogue focus's page keeps its path.
+  // Leaving an overview's page returns to the scene's.
   if (isOverviewPage(objectIdAtPath(url.pathname))) withPage(url, sceneId, null);
   if (!scope) {
     url.searchParams.delete('overview');
diff --git a/site/object-adapter.mts b/site/object-adapter.mts
index a5ff79088ba..223948ae4cf 100644
--- a/site/object-adapter.mts
+++ b/site/object-adapter.mts
@@ -14,7 +14,7 @@ export const objectAdapter = Object.freeze({
     } else {
       const directory = objects ? null : await import('./object-directory.mts');
       const loaded = directory ? await directory.loadObject(objectId) : objects!.find(({ id }) => id === objectId);
-      const objectRecord = loaded && (!directory || directory.isLoadedScene(loaded)) ? loaded as ObjectEntry : null;
+      const objectRecord = loaded ?? null;
       if (!objectRecord) throw new Error(`Unknown cssEarth object: ${objectId ?? "unknown"}.`);
       mount = await objectRecord.loadScene(signal);
     }
diff --git a/site/object-browser.mts b/site/object-browser.mts
index 92ba64bda9f..07dd991d12d 100644
--- a/site/object-browser.mts
+++ b/site/object-browser.mts
@@ -34,19 +34,15 @@ interface ShownSearch {
 
 interface SubjectOverride {
   readonly subject: SceneSubject;
-  hideFocus: boolean;
 }
 
 export function createObjectBrowserController(documentTarget: Document, windowTarget: BrowserWindow, lifetime: SceneLifetime,
   { readSelection, readObjectId, onCategoryChange = () => {}, readIllustrationModels = () => false, onResetDestination = () => {},
     onFrameCategory = () => {}, onSearchChange = () => {} }: ObjectBrowserOptions) {
-  // Browsing a system keeps the committed focus; a flight preview temporarily
-  // covers it. Neither changes which scene or focus the shell owns.
+  // A flight preview temporarily covers the committed selection; it does not change which scene the shell owns.
   let subjectOverride: SubjectOverride | null = null;
   const currentSubject = (): SceneSubject => {
-    const committed = readSelection();
-    return subjectOverride && (subjectOverride.hideFocus || committed.kind !== 'focus')
-      ? subjectOverride.subject : committed;
+    return subjectOverride ? subjectOverride.subject : readSelection();
   };
   const search = documentTarget.querySelector(".object-sidebar-search");
   const searchCard = documentTarget.querySelector(".object-sidebar-search-card");
@@ -268,12 +264,6 @@ export function createObjectBrowserController(documentTarget: Document, windowTa
       if (next < 0) search.focus(); else controls[Math.min(next, controls.length - 1)]?.focus();
     }
   }, { signal: events.signal });
-  browser.addEventListener('click', event => {
-    if (event.defaultPrevented || event.button !== 0 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey) return;
-    if (!(event.target instanceof windowTarget.Element) || !event.target.closest('a[data-prepared-focus-id]')) return;
-    setOpen(false);
-    search.blur();
-  }, { signal: events.signal });
   // Pressing or wheeling the scene leaves the search: the results close and the typed query stays for reopening.
   const sceneInput = documentTarget.querySelector<HTMLElement>('.object-input-surface');
   for (const type of ['pointerdown', 'wheel'] as const) {
@@ -290,7 +280,7 @@ export function createObjectBrowserController(documentTarget: Document, windowTa
 
   const previewSelection = (subject: SceneSubject) => {
     const previous = subjectOverride, previousOpen = open, previousQuery = search.value;
-    const preview = { subject, hideFocus: true };
+    const preview = { subject };
     subjectOverride = preview;
     // Choosing a result ends that search; a cancelled flight gives the query back.
     if (search.value) search.value = '';
@@ -313,10 +303,7 @@ export function createObjectBrowserController(documentTarget: Document, windowTa
     previewSelection,
     refreshSelection() {
       const subject = readSelection();
-      // Focus content can publish during a preview; keep its temporary context.
-      if (subject.kind === 'focus') {
-        if (subjectOverride) subjectOverride.hideFocus = false;
-      } else subjectOverride = null;
+      subjectOverride = null;
       if (subject.kind === 'overview') destinations?.present(null);
       refreshSelection();
     },
diff --git a/site/object-directory.mts b/site/object-directory.mts
index 1b5e118a4c4..36b181e5be2 100644
--- a/site/object-directory.mts
+++ b/site/object-directory.mts
@@ -1,5 +1,5 @@
 import { importPackagedObjectRuntime } from './import-queue.mts';
-import { catalogueObject, defineOverview, isSceneObject } from '@cssearth/objects';
+import { catalogueLevel, catalogueObject } from '@cssearth/objects';
 import type { OverviewObject } from '@cssearth/objects';
 import type { NavigableObject, ObjectEntry } from './objects.mts';
 import overviews from './prepared-overview-objects.json' with { type: 'json' };
@@ -8,23 +8,22 @@ import { startupFetch } from './startup-requests.mts';
 /** The objects a page knows, read one at a time from their prepared entries (`pages/objects/[id]/entry.json.ts`) the first
  * time the page needs them: its own, the Sun's, and whatever it navigates to. A page never loads the whole registry, so an
  * object added to the universe costs nothing on any other page. The overviews are the exception: every URL is read against
- * them (a path names either a scene, a catalogue focus or an overview), so the directory starts with their few entries. Both lists are live: consumers that search them find
+ * them (a path names either an object or a level), so the directory starts with their few entries. Both lists are live: consumers that search them find
  * every object loaded so far. The build and the search function seed them from the full registry (`seedObjectDirectory`). */
 export const NAVIGABLE_OBJECTS: NavigableObject[] = [];
-export const SCENE_OBJECTS: ObjectEntry[] = [];
+/** Every object has a scene of its own: the same live list, under the name the scene code reads. */
+export const SCENE_OBJECTS: ObjectEntry[] = NAVIGABLE_OBJECTS;
 
 const loading = new Map<string, Promise<NavigableObject | null>>();
 function add(object: NavigableObject) {
   if (NAVIGABLE_OBJECTS.some(known => known.id === object.id)) return;
   NAVIGABLE_OBJECTS.push(object);
-  if (isSceneObject(object)) SCENE_OBJECTS.push(object);
 }
 /** The overviews, from the nearest level of the zoom ladder out: every page knows them (see above). The build's registry
  * holds the same entries (objects.mts OVERVIEWS). */
-export const KNOWN_OVERVIEWS: readonly OverviewObject[] = Object.freeze(overviews.map(defineOverview).sort((a, b) => a.order - b.order));
-for (const overview of KNOWN_OVERVIEWS) add(overview);
-/** Whether a loaded object owns a scene. */
-export const isLoadedScene = isSceneObject;
+export const KNOWN_OVERVIEWS: readonly OverviewObject[] = Object.freeze(overviews.map(catalogueLevel).sort((a, b) => a.order - b.order));
+/** The level with `id`, when `id` names one. */
+export const knownLevel = (id: string | null | undefined): OverviewObject | undefined => KNOWN_OVERVIEWS.find(level => level.id === id);
 /** The object with `id` if the page has loaded it. */
 export const knownObject = (id: string): NavigableObject | undefined => NAVIGABLE_OBJECTS.find(object => object.id === id);
 
diff --git a/site/object-entry.mts b/site/object-entry.mts
index d9cd2556148..9de852ecd8b 100644
--- a/site/object-entry.mts
+++ b/site/object-entry.mts
@@ -1,10 +1,9 @@
 import { isRecord } from '@cssearth/core';
 import { OBJECTS } from './objects.mts';
 import { CATALOGUE_ENTRIES } from './prepared-catalogue.mjs';
-import overviews from './prepared-overview-objects.json' with { type: 'json' };
 
 const entryId = (entry: unknown) => !isRecord(entry) ? undefined : isRecord(entry.descriptor) ? entry.descriptor.id : entry.id;
-const ENTRIES = new Map<unknown, unknown>([...CATALOGUE_ENTRIES, ...overviews].map(entry => [entryId(entry), entry]));
+const ENTRIES = new Map<unknown, unknown>(CATALOGUE_ENTRIES.map(entry => [entryId(entry), entry]));
 
 /** One navigable object's prepared catalogue entry, as `/objects/<id>/entry.json` serves it to the page's object directory
  * (`object-directory.mts`). The registry (`objects.mts`) decodes every object from these same entries. */
diff --git a/site/object-page-data.mts b/site/object-page-data.mts
index 39b12d05370..3d7cfabb01f 100644
--- a/site/object-page-data.mts
+++ b/site/object-page-data.mts
@@ -21,7 +21,7 @@ async function preparedTransports(id: string, root: string): Promise<PreparedTra
   if (!transports) {
     transports = (async () => {
       const directory = resolve(root, 'src/objects', id);
-      const descriptor = parseObjectDescriptor(JSON.parse(await readFile(resolve(directory, 'object.json'), 'utf8')));
+      const descriptor = parseObjectDescriptor(JSON.parse(await readFile(resolve(directory, 'object.json'), 'utf8')) as unknown);
       if (descriptor.id !== id || descriptor.prepared?.url !== 'prepared/object.json') {
         throw new TypeError(`${id}: invalid prepared page reference.`);
       }
@@ -69,7 +69,7 @@ export async function readPreparedDatasetBytes(id: string, datasetId: string, ro
 export async function loadObjectPageData(id: string, root = process.cwd()) {
   if (!/^[a-z][a-z0-9-]*$/u.test(id)) throw new TypeError('Invalid object page identity.');
   const directory = resolve(root, 'src/objects', id);
-  const descriptor = parseObjectDescriptor(JSON.parse(await readFile(resolve(directory, 'object.json'), 'utf8')));
+  const descriptor = parseObjectDescriptor(JSON.parse(await readFile(resolve(directory, 'object.json'), 'utf8')) as unknown);
   const page = descriptor.properties.page;
   const reference = isRecord(page) && isRecord(page.metadata) ? page.metadata : null;
   if (descriptor.id !== id || reference?.url !== 'prepared/page.json') {
diff --git a/site/object-shell.css b/site/object-shell.css
index 987c6cc30bd..6f211d17a48 100644
--- a/site/object-shell.css
+++ b/site/object-shell.css
@@ -643,6 +643,20 @@ details:not([open]) > .object-panel-summary .object-panel-icon {
   font: var(--shell-font-introduction);
   user-select: text;
 }
+/* The publications a hosted package's facts come from, under its factsheet (HostedObjectFacts.astro). */
+.object-fact-sources {
+  display: grid;
+  gap: 6px;
+  margin: 12px 0 0;
+  padding: 0;
+  list-style: none;
+  font: var(--shell-font-small);
+}
+.object-fact-sources a {
+  color: var(--shell-text-secondary);
+  overflow-wrap: anywhere;
+  text-underline-offset: 2px;
+}
 .object-learn-more-link {
   display: inline-block;
   width: fit-content;
diff --git a/site/objects.mts b/site/objects.mts
index 01e1e4dbabf..6299d26d17b 100644
--- a/site/objects.mts
+++ b/site/objects.mts
@@ -1,5 +1,5 @@
-import { defineObjects, isSceneObject } from '@cssearth/objects';
-import type { CatalogEntry as RegistryCatalogEntry, NavigableObject as RegistryNavigableObject, ObjectEntry as RegistryObjectEntry, OverviewObject } from '@cssearth/objects';
+import { catalogueLevel, defineObjects } from '@cssearth/objects';
+import type { CatalogEntry as RegistryCatalogEntry, NavigableObject as RegistryNavigableObject, ObjectEntry as RegistryObjectEntry } from '@cssearth/objects';
 import { CATALOGUE_ENTRIES } from './prepared-catalogue.mjs';
 import overviews from './prepared-overview-objects.json' with { type: 'json' };
 import { objectFromEntry } from './object-directory.mts';
@@ -12,17 +12,16 @@ export type NavigableObject = RegistryNavigableObject<SceneFactory, AbortSignal>
 
 /** The single application registry: every entry of the prepared catalogue (`pnpm prepare:catalog`), decoded as a page's
  * object directory decodes the one entry it loads. */
-export const OBJECTS = defineObjects<NavigableObject>([...CATALOGUE_ENTRIES, ...overviews].map(objectFromEntry));
+export const OBJECTS = defineObjects<NavigableObject>(CATALOGUE_ENTRIES.map(objectFromEntry));
 
-/** A capability projection of OBJECTS, never an independently maintained registry. */
-export const SCENE_OBJECTS = Object.freeze(OBJECTS.filter(isSceneObject));
-for (const object of OBJECTS) if (object.kind !== 'scene' && !SCENE_OBJECTS.some(host => host.id === object.sceneHostId)) {
-  throw new TypeError(`${object.kind === 'overview' ? 'Overview' : 'Prepared focus'} host is not a registered scene: ${object.id}`);
-}
+/** Every object has a scene of its own: the same list, under the name the scene code reads. */
+export const SCENE_OBJECTS = OBJECTS;
 
-/** The overviews, from the nearest level of the zoom ladder out: a projection of OBJECTS like SCENE_OBJECTS. */
-export const OVERVIEWS = Object.freeze(OBJECTS.filter((object): object is OverviewObject => object.kind === 'overview')
-  .sort((a, b) => a.order - b.order));
+/** The levels of the zoom ladder, from the nearest out. A level is a view of a scene, not an object: its page is the
+ * world host's scene at that zoom. */
+export const OVERVIEWS = Object.freeze(overviews.map(catalogueLevel).sort((a, b) => a.order - b.order));
+// An id names one page: an object's or a level's.
+defineObjects<{ id: string; route: string }>([...OBJECTS, ...OVERVIEWS]);
 
 export function requireObject(id: string) {
   const object = OBJECTS.find(candidate => candidate.id === id);
@@ -30,8 +29,12 @@ export function requireObject(id: string) {
   return object;
 }
 
+/** What the page `/<id>/` is: an object, or a level of the zoom ladder. */
+export function requirePage(id: string): { readonly id: string; readonly name: string; readonly description: string; readonly route: string } {
+  return OVERVIEWS.find(level => level.id === id) ?? requireObject(id);
+}
+
 export function requireSceneObject(id: string) {
-  const object = requireObject(id);
-  if (!isSceneObject(object)) throw new TypeError(`Object ${id} is ${object.kind === 'overview' ? 'an overview' : 'a prepared focus'}, not a scene owner.`);
-  return object;
+  if (OVERVIEWS.some(level => level.id === id)) throw new TypeError(`${id} is a level of the zoom ladder: it has no scene of its own.`);
+  return requireObject(id);
 }
diff --git a/site/overview-context.mts b/site/overview-context.mts
index da03c66ed9c..dc17af800a0 100644
--- a/site/overview-context.mts
+++ b/site/overview-context.mts
@@ -1,6 +1,5 @@
 import { SYSTEM_FRAMING_RADII, systemOverviewDistance } from './system-framing.mts';
 import type { ObjectWorldNavigation } from '@cssearth/renderer/runtime/world-navigation-types.ts';
-import type { PreparedCatalogObject } from '@cssearth/catalog';
 import type { WorldCameraPose, PreparedWorldCameraFrame } from '@cssearth/renderer/navigation/world-camera.ts';
 /** `system` is the planetary system of the mounted star, and every other scope is an overview's id (its registry entry,
  * KNOWN_OVERVIEWS); every scope is measured from that star (overviewScopeAtCamera). */
@@ -95,7 +94,7 @@ export function overviewScopeAtCamera(world: WorldCameraPose, previous: Overview
   return reachable[0]?.id ?? 'system';
 }
 
-export function viewDistance(world: WorldCameraPose, frame: PreparedWorldCameraFrame, scope: OverviewScope, plan = context, focus: Pick<PreparedCatalogObject, 'name' | 'positionM'> | null = null) {
+export function viewDistance(world: WorldCameraPose, frame: PreparedWorldCameraFrame, scope: OverviewScope, plan = context, focus: { readonly name: string; readonly positionM: readonly number[] } | null = null) {
   if (focus) return { label: `Distance to ${focus.name}:`, meters: distance(world.pose.positionM, focus.positionM),
     title: `Camera distance from the prepared center of ${focus.name}` };
   return scope !== 'system' ? {
diff --git a/site/page-datasets.mts b/site/page-datasets.mts
index e2481c6699e..0e98117890c 100644
--- a/site/page-datasets.mts
+++ b/site/page-datasets.mts
@@ -1,6 +1,7 @@
 import { publishDatasetPreview, sectionElements, showSection } from '@cssearth/renderer';
 import { objectIdAtPath } from './root-object.mts';
-import { knownObject } from './object-directory.mts';
+import { knownLevel } from './object-directory.mts';
+import { WORLD_HOST_ID } from './navigation/navigation-scope.mts';
 
 /** The datasets of a page the world draws around the mounted scene (an overview): its package's datasets, shown with the
  * shared dataset card inside its card and chosen, as on every page, by `?dataset=` on its own page. The card carries each
@@ -31,7 +32,8 @@ export function selectedPageDataset(url: string | URL, datasets: Pick<PageDatase
  * since choosing one would mean leaving that star for the page. */
 export function presentPageDatasets(document: ParentNode, url: string | URL, sceneId: string) {
   for (const datasets of readPageDatasets(document)) {
-    const page = knownObject(datasets.page), hosted = page?.kind === 'overview' && page.sceneHostId === sceneId;
+    // A level's datasets show on the scene that draws its page, the world's host.
+    const hosted = knownLevel(datasets.page) !== undefined && sceneId === WORLD_HOST_ID;
     if (datasets.root.hidden !== !hosted) datasets.root.hidden = !hosted;
     // Their tab goes with them: from another star the Observable Universe card showed a Datasets tab over nothing
     // (2026-10-01). A card left with no tab hides the row; one whose Datasets tab was open opens its first other tab.
@@ -51,6 +53,6 @@ export function presentPageDatasets(document: ParentNode, url: string | URL, sce
       if (button.getAttribute('aria-pressed') !== pressed) button.setAttribute('aria-pressed', pressed);
     }
     publishDatasetPreview(datasets.root, buttons);
-    for (const detail of sectionElements(datasets.root, '[data-focus-dataset-details]')) showSection(detail, detail.dataset.focusDatasetDetails === dataset);
+    for (const detail of sectionElements(datasets.root, '[data-page-dataset-details]')) showSection(detail, detail.dataset.pageDatasetDetails === dataset);
   }
 }
diff --git a/site/pages/[id].astro b/site/pages/[id].astro
index f4a00c2a4dd..5a166ab110c 100644
--- a/site/pages/[id].astro
+++ b/site/pages/[id].astro
@@ -1,15 +1,13 @@
 ---
 import ObjectPage from '../components/ObjectPage.astro';
-import { OBJECTS } from '../objects.mts';
+import { OBJECTS, OVERVIEWS } from '../objects.mts';
 import { WORLD_HOST_ID } from '../navigation/navigation-scope.mts';
 import { builtObjectPages } from '../built-pages.mts';
 export function getStaticPaths() {
-  // Every object has its page, `/<id>/`. A scene's page mounts it; the page of anything the world draws around a scene
-  // (a catalogue subject, an overview) mounts its host, the world's, with it selected: the path names it.
-  for (const object of OBJECTS) if (object.kind !== 'scene' && object.sceneHostId !== WORLD_HOST_ID) {
-    throw new TypeError(`${object.id} is hosted by ${object.sceneHostId}, not the world's host ${WORLD_HOST_ID}.`);
-  }
-  return builtObjectPages(OBJECTS.map(object => ({ params: { id: object.id }, props: { sceneId: object.kind === 'scene' ? object.id : object.sceneHostId } })), OBJECTS);
+  // Every object has its page, `/<id>/`, which mounts its scene. A level of the zoom ladder has a page too: the world
+  // host's scene at that zoom, with the level selected.
+  const pages: { id: string; sceneHostId?: string }[] = [...OBJECTS.map(object => ({ id: object.id })), ...OVERVIEWS.map(level => ({ id: level.id, sceneHostId: WORLD_HOST_ID }))];
+  return builtObjectPages(pages.map(page => ({ params: { id: page.id }, props: { sceneId: page.sceneHostId ?? page.id } })), pages);
 }
 ---
 <ObjectPage objectId={Astro.props.sceneId} pageId={Astro.params.id!} />
diff --git a/site/pages/catalogues/[id].json.ts b/site/pages/catalogues/[id].json.ts
index 5ada02c0357..cc464f3474d 100644
--- a/site/pages/catalogues/[id].json.ts
+++ b/site/pages/catalogues/[id].json.ts
@@ -1,7 +1,7 @@
 import type { APIRoute } from 'astro';
-import { FOCUS_CATALOG_DATA } from '../../focus-catalog-data.mts';
+import { DOT_CATALOGUE_DATA } from '../../dot-catalogue-data.mts';
 
-export function getStaticPaths() { return FOCUS_CATALOG_DATA.map(catalog => ({ params: { id: catalog.id }, props: { text: catalog.text } })); }
+export function getStaticPaths() { return DOT_CATALOGUE_DATA.map(catalog => ({ params: { id: catalog.id }, props: { text: catalog.text } })); }
 export const GET: APIRoute = ({ props }) => {
   if (typeof props.text !== 'string') throw new TypeError('Prepared catalogue text is missing.');
   return new Response(props.text, { headers: { 'Content-Type': 'application/json; charset=utf-8' } });
diff --git a/site/pages/focus-fragment/index.astro b/site/pages/focus-fragment/index.astro
deleted file mode 100644
index 3336adc4d74..00000000000
--- a/site/pages/focus-fragment/index.astro
+++ /dev/null
@@ -1,7 +0,0 @@
----
-// The prepared focus card's dataset banks, rendered once for every object page.
-// Pages fetch this on their first focus selection (`site/focus-fragment.mts`).
-import PreparedFocusDatasets from '../../components/PreparedFocusDatasets.astro';
----
-<div data-focus-banks="datasets"><PreparedFocusDatasets /></div>
-<div data-focus-banks="facts"><PreparedFocusDatasets factsOnly /></div>
diff --git a/site/pages/sitemap.xml.ts b/site/pages/sitemap.xml.ts
index f280d26ecf7..fdbafbe9e95 100644
--- a/site/pages/sitemap.xml.ts
+++ b/site/pages/sitemap.xml.ts
@@ -1,9 +1,9 @@
-import { OBJECTS } from "../objects.mts";
-import { focusSeo, objectSeo } from "../seo.mts";
+import { OBJECTS, OVERVIEWS } from "../objects.mts";
+import { objectSeo } from "../seo.mts";
 
-/** Every page, `/<id>/`: each scene, each catalogue subject and each overview. */
+/** Every page, `/<id>/`: each object and each level. */
 export function GET() {
-  const pages = OBJECTS.map(object => object.kind === "prepared-focus" ? focusSeo(object) : objectSeo(object));
+  const pages = [...OBJECTS, ...OVERVIEWS].map(page => objectSeo(page));
   const urls = pages.map((page) => `  <url><loc>${page.canonical}</loc></url>`).join("\n");
   return new Response(
     `<?xml version="1.0" encoding="UTF-8"?>\n` +
diff --git a/site/prepare-body-moons.mts b/site/prepare-body-moons.mts
index 40adba5a250..f6e489478a1 100644
--- a/site/prepare-body-moons.mts
+++ b/site/prepare-body-moons.mts
@@ -1,5 +1,4 @@
 import { SEARCH_OBJECTS } from './search/search-objects.mts';
-import { isSceneObject } from '@cssearth/objects';
 import type { ObjectEntry } from './objects.mts';
 import preparedWorld from '../src/objects/sun/prepared/world-context.json' with { type: 'json' };
 import moonCatalogues from './source/moon-catalogues.json' with { type: 'json' };
@@ -33,7 +32,7 @@ const catalogues: Readonly<Record<string, ReturnType<typeof parseMoonCatalogue>>
 export function prepareBodyMoons(objectId: string): readonly MoonListEntry[] {
   const children = new Set(preparedWorld.bodies
     .filter(body => body.orbit?.centerBodyId === objectId).map(body => body.id));
-  const available = SEARCH_OBJECTS.filter(isSceneObject).filter(object =>
+  const available = SEARCH_OBJECTS.filter(object =>
     object.classification === 'satellite' && children.has(object.id));
   const catalogue = catalogues[objectId];
   if (!catalogue) return available.map(object => ({ id: object.id, name: object.name, object }));
@@ -50,7 +49,7 @@ export function prepareBodyRelations(objectId: string) {
   const object = SEARCH_OBJECTS.find(object => object.id === objectId);
   const parentId = object?.classification === 'satellite'
     ? preparedWorld.bodies.find(body => body.id === objectId)?.orbit?.centerBodyId : undefined;
-  const parent = SEARCH_OBJECTS.filter(isSceneObject).find(object => object.id === parentId);
+  const parent = SEARCH_OBJECTS.find(object => object.id === parentId);
   if (!parent) return null;
   return { label: `${parent.name} system`, parent,
     moons: prepareBodyMoons(parent.id).filter(moon => moon.id !== objectId && moon.object && !moon.object.discovery.illustration) };
diff --git a/site/prepared-context-navigation.mts b/site/prepared-context-navigation.mts
deleted file mode 100644
index 8de9a2dbdcc..00000000000
--- a/site/prepared-context-navigation.mts
+++ /dev/null
@@ -1,162 +0,0 @@
-import type { PreparedCatalogObject, SpatialCatalogSource, SpatialCitation } from '@cssearth/catalog';
-import type { createPreparedUniverse } from '@cssearth/renderer/universe/prepared-universe-runtime.ts';
-import type { ObjectWorldNavigation } from '@cssearth/renderer/runtime/world-navigation-types.ts';
-import type { PreparedNavigationFocus } from '@cssearth/renderer/navigation/prepared-focus.ts';
-import { presentWorldCamera } from '@cssearth/renderer/navigation';
-import { readPreparedFocusSelection } from './navigation/navigation-scope.mts';
-import { acquirePreparedFocusTarget } from './prepared-focus-target.mts';
-import type { PreparedFocusTarget } from './prepared-focus-target.mts';
-import type { PreparedFocusPolicy, PreparedFocusPresentation } from './prepared-focus.mts';
-
-type PreparedContextLayer = Pick<ReturnType<ReturnType<typeof createPreparedUniverse>['mount']>, 'resolveGalaxy' | 'ensureGalaxyCatalog' | 'focusBank' | 'selectGalaxy'>;
-export interface FocusPublication {
-  record: PreparedCatalogObject | null;
-  sources: readonly SpatialCitation[];
-  presentation: PreparedFocusPresentation | null;
-  url: 'preserve' | 'selection' | 'reframe';
-}
-export interface FocusCallbacks {
-  readFocus(): string | null;
-  onFocusChange(publication: FocusPublication): void;
-  canPublish(): boolean;
-}
-export interface FocusOperation {
-  /** The scene whose page the URL is on: its path names a focus when it names anything else. */
-  readonly sceneId: string;
-  readonly signal: AbortSignal;
-  isCurrent(): boolean;
-  readonly frame: boolean;
-  readonly reducedMotion: boolean;
-}
-interface ContextNavigationOptions {
-  layer: PreparedContextLayer;
-  presentation: PreparedFocusPolicy;
-  sources?: readonly SpatialCatalogSource[] | (() => readonly SpatialCatalogSource[]);
-  windowTarget: Window;
-  onError?(error: unknown): void;
-  unavailableObjectIds?: readonly string[];
-}
-
-/** A saved focus camera is authoritative only while its named subject still intersects the stage. */
-function savedCameraShowsFocus(navigation: ObjectWorldNavigation, focus: PreparedNavigationFocus) {
-  const optics = navigation.optics();
-  const view = presentWorldCamera(navigation.capture(), { ...navigation.frame,
-    originM: focus.positionM, bodyRadiusM: focus.framingRadiusM }, optics);
-  // A camera inside a prepared volume can validly look away from its centre while the volume surrounds it.
-  if (view.distanceM <= focus.framingRadiusM) return true;
-  const ellipse = view.silhouette;
-  if (!ellipse) return false;
-  const width = optics.widthPixels ?? optics.framingRadiusPixels * 2;
-  const height = optics.heightPixels ?? optics.framingRadiusPixels * 2;
-  const rect = optics.visibleRect ?? { left: -width / 2, right: width / 2, top: -height / 2, bottom: height / 2 };
-  // The ellipse can be rotated. Its largest semi-axis is a conservative intersection bound:
-  // false means certainly off-screen, while an edge-on saved composition remains untouched.
-  const radius = Math.max(ellipse.radialSemiAxis, ellipse.tangentialSemiAxis);
-  const [x, y] = ellipse.centre;
-  return x + radius >= rect.left && x - radius <= rect.right &&
-    y + radius >= rect.top && y - radius <= rect.bottom;
-}
-
-/** Catalogue focus on the current detailed scene's shared camera owner. */
-export function createPreparedContextNavigation({ layer, presentation, sources = [], windowTarget, onError = console.error, unavailableObjectIds = [] }: ContextNavigationOptions) {
-  /** The detailed scene's camera owner this focus is connected to, with that scene's publication callbacks. */
-  let connection: (FocusCallbacks & { readonly owner: ObjectWorldNavigation; unsubscribe(): void }) | null = null;
-  let target: PreparedFocusTarget | null = null;
-  const currentSources = () => typeof sources === 'function' ? sources() : sources;
-  const useTarget = (id: string | null) => {
-    if (id === (target?.id ?? null)) return target;
-    const next = id ? acquirePreparedFocusTarget(id, { layer, policy: presentation, sources: currentSources, unavailableObjectIds,
-      onChange: () => { if (target?.id === id) publishDataset(); }, onError }) : null;
-    const previous = target;
-    target = next;
-    previous?.release();
-    return target;
-  };
-  /** The connected scene may publish this target: it can publish, and its camera and committed focus both name it. */
-  const owns = (active: PreparedFocusTarget) => {
-    const current = connection;
-    return current !== null && current.canPublish() && current.owner.preparedFocus?.()?.id === active.id && current.readFocus() === active.id;
-  };
-  const publishContent = (url: FocusPublication['url'] = 'selection') => {
-    const active = target, state = active?.datasets;
-    const controls = active && state ? { ...state,
-      selectDataset(dataset: string) { if (target === active && owns(active)) active.selectDataset(dataset); },
-    } : null;
-    connection?.onFocusChange({ record: active?.record ?? null, sources: active?.citations ?? [], presentation: controls, url });
-  };
-  const publishDataset = () => { if (target && owns(target)) publishContent(); };
-  const publishSelection = (force = false) => {
-    const current = connection;
-    if (!current) return;
-    const focus = current.owner.preparedFocus?.() ?? null, next = focus?.id ?? null;
-    layer.selectGalaxy(next, focus);
-    if (!force && next === current.readFocus()) return;
-    useTarget(next);
-    publishContent();
-  };
-  const disconnect = () => {
-    connection?.unsubscribe();
-    useTarget(null);
-    connection = null;
-  };
-  /** The application request/session owns cancellation; this executor owns only the prepared target. */
-  function apply(url: string | URL, operation: FocusOperation): void | Promise<void> {
-    const owner = connection?.owner ?? null;
-    const current = () => connection?.owner === owner && !operation.signal.aborted && operation.isCurrent();
-    if (!owner || !current()) return;
-    const location = new URL(url, windowTarget.location.href), query = location.searchParams;
-    const recover = (error: unknown): never => {
-      if (current()) {
-        const focus = owner.preparedFocus();
-        const id = focus?.id ?? null;
-        layer.selectGalaxy(id, focus); useTarget(id); publishContent('preserve');
-      }
-      throw error;
-    };
-    let selection: ReturnType<typeof readPreparedFocusSelection>;
-    try { selection = readPreparedFocusSelection(location, operation.sceneId); } catch (error) { return recover(error); }
-    const activate = () => {
-      if (!current()) return;
-      const focus = target?.focus ?? null;
-      if (!operation.frame) {
-        const id = selection?.id ?? null, state = target?.datasets;
-        const dataset = target?.resolveDataset(selection?.dataset ?? null);
-        owner.setPreparedFocus(focus);
-        if (dataset !== undefined) target!.selectDataset(dataset);
-        layer.selectGalaxy(id, focus);
-        // Preserve an incoming composition while it still contains its named focus.
-        const reframe = focus !== null && !(query.has('v') && savedCameraShowsFocus(owner, focus));
-        publishContent(reframe && query.has('v') ? 'reframe'
-          : !id || (state && !query.has('dataset')) ? 'selection' : 'preserve');
-        if (!reframe) return;
-      }
-      if (!focus) return;
-      const flight = owner.flyToPreparedFocus(focus, { signal: operation.signal, reducedMotion: operation.reducedMotion });
-      publishSelection(true);
-      return flight.then(() => { if (current()) publishSelection(); });
-    };
-    const prepare = () => {
-      if (!current()) return;
-      const loading = useTarget(selection?.id ?? null)?.prepare({ preload: operation.frame });
-      return loading ? loading.then(activate) : activate();
-    };
-    try {
-      const pending = selection && !layer.resolveGalaxy(selection.id) ? layer.ensureGalaxyCatalog().then(prepare) : prepare();
-      return pending?.catch(recover);
-    } catch (error) { return recover(error); }
-  }
-
-  return Object.freeze({
-    connect(owner: ObjectWorldNavigation, { onFocusChange, canPublish, readFocus }: FocusCallbacks) {
-      connection?.unsubscribe(); useTarget(null);
-      const next = { owner, onFocusChange, canPublish, readFocus, unsubscribe() {} };
-      connection = next;
-      // A subscription may publish at once, so the connection is in place before it starts.
-      next.unsubscribe = owner.subscribe(() => { if (canPublish()) publishSelection(); });
-      // An older disconnect still releases a newer connection to the same owner, as before.
-      return () => { if (connection?.owner === owner) disconnect(); };
-    },
-    apply,
-    destroy: disconnect,
-  });
-}
diff --git a/site/prepared-focus-card.mts b/site/prepared-focus-card.mts
deleted file mode 100644
index ddeb21851d4..00000000000
--- a/site/prepared-focus-card.mts
+++ /dev/null
@@ -1,138 +0,0 @@
-import { catalogueClassification, isPreparedCluster, isPreparedNebula } from '@cssearth/catalog';
-import { publishDatasetPreview, sectionElements, showSection } from '@cssearth/renderer';
-import type { PreparedCatalogObject, SpatialCitation } from '@cssearth/catalog';
-import { preparedFocusObjectId } from './prepared-focus.mts';
-import type { PreparedFocusPresentation } from './prepared-focus.mts';
-import { overviewHoldingAt } from './overview-context.mts';
-import { wikipediaLearnMoreUrl } from './learn-more.mts';
-
-interface PreparedFocusCard {
-  set(record: PreparedCatalogObject | null, sources?: readonly SpatialCitation[], presentation?: PreparedFocusPresentation | null): void;
-  /** Adopt dataset banks spliced in after mount (`focus-fragment.mts`) and present the current record again. */
-  adoptBanks(): void;
-  destroy(): void;
-}
-
-const number = new Intl.NumberFormat('en-US', { maximumSignificantDigits: 4 });
-const words = (value: string) => value.replaceAll('-', ' ').replace(/^./u, letter => letter.toUpperCase());
-
-/** One retained card transports the selected prepared record; no catalogue is imported here.
- * Its visibility belongs to the selection presentation (`selection-presentation.mts`). */
-export function createPreparedFocusCard(root: HTMLElement | null, showTab: (id: string) => void = () => {}): PreparedFocusCard {
-  if (!root) return { set() {}, adoptBanks() {}, destroy() {} };
-  // The factsheet tab's panel waits in a template while closed (tab-panels.mts): its fields are found there too.
-  const find = <E extends HTMLElement = HTMLElement>(selector: string) => sectionElements<E>(root, selector);
-  const fields = Object.fromEntries(['name', 'aliases', 'introduction', 'status', 'distance', 'uncertainty', 'membership', 'association']
-    .map(name => { const field = find(`[data-focus-${name}]`)[0]; if (!field) throw new Error(`Prepared focus field is missing: ${name}.`); return [name, field]; }));
-  const aliasesRow = find('[data-focus-aliases-row]')[0] ?? null;
-  const learnMore = find<HTMLAnchorElement>('[data-focus-learn-more]')[0] ?? null;
-  const links = find<HTMLAnchorElement>('[data-focus-source]');
-  const sourceRows = find('[data-focus-source-row]');
-  const breadcrumbs = find('[data-focus-breadcrumb-scope]');
-  const events = new AbortController();
-  const unavailable = root.querySelector<HTMLElement>('[data-focus-unavailable]');
-  const unavailableIds = new Set(unavailable?.dataset.unavailableObjects?.split(' ') ?? []);
-  let currentPresentation: PreparedFocusPresentation | null = null;
-  const datasetTab = root.querySelector<HTMLElement>('[data-information-tab="dataset"]');
-  let currentRecordId: string | undefined;
-  type Bank = { root: HTMLElement; buttons: HTMLButtonElement[]; details: HTMLElement[]; contexts: HTMLElement[] };
-  const banks: Bank[] = [];
-  const adopt = () => {
-    for (const element of find('[data-focus-dataset-bank], [data-focus-facts-bank]')) {
-      if (banks.some(bank => bank.root === element)) continue;
-      const bank = { root: element,
-        buttons: [...element.querySelectorAll<HTMLButtonElement>('[data-focus-dataset]')],
-        details: sectionElements(element, '[data-focus-dataset-details]'),
-        contexts: sectionElements(element, '[data-dataset-context]'),
-      };
-      for (const button of bank.buttons) button.addEventListener('click', event => {
-        if (currentPresentation && currentPresentation.objectId === bank.root.dataset.focusDatasetBank) {
-          event.preventDefault(); currentPresentation.selectDataset(button.getAttribute('value') ?? '');
-        }
-      }, { signal: events.signal });
-      banks.push(bank);
-    }
-  };
-  adopt();
-  let presented: Parameters<PreparedFocusCard['set']> | null = null;
-  const setPresentation = (record: PreparedCatalogObject | null, presentation: PreparedFocusPresentation | null) => {
-    const previous = currentPresentation?.objectId;
-    currentPresentation = record && preparedFocusObjectId(record) === presentation?.objectId ? presentation : null;
-    if (datasetTab && datasetTab.hidden !== !currentPresentation) datasetTab.hidden = !currentPresentation;
-    if (record && (record.id !== currentRecordId || previous !== currentPresentation?.objectId))
-      showTab(currentPresentation ? 'dataset' : 'factsheet');
-    currentRecordId = record?.id;
-    for (const bank of banks) {
-      const active = currentPresentation?.objectId === (bank.root.dataset.focusDatasetBank ?? bank.root.dataset.focusFactsBank);
-      // Only the selected object's bank is mounted; the others wait in templates (detached-sections.ts).
-      showSection(bank.root, active);
-      if (!active || !currentPresentation) continue;
-      const available = new Set(currentPresentation.datasets.map(dataset => dataset.id));
-      for (const button of bank.buttons) {
-        // Read the prepared attribute in both the server DOM and the live browser.
-        const dataset = button.getAttribute('value') ?? '';
-        button.disabled = !available.has(dataset);
-        const pressed = String(dataset === currentPresentation.selectedDataset);
-        if (button.getAttribute('aria-pressed') !== pressed) button.setAttribute('aria-pressed', pressed);
-      }
-      publishDatasetPreview(bank.root, bank.buttons);
-      for (const detail of bank.details) showSection(detail, detail.dataset.focusDatasetDetails === currentPresentation.selectedDataset);
-      for (const context of bank.contexts) showSection(context, context.dataset.datasetContext === currentPresentation.selectedDataset);
-    }
-  };
-  const write = (name: string, value: string) => { if (fields[name].textContent !== value) fields[name].textContent = value; };
-  const card: PreparedFocusCard = { set(record, sources = [], presentation = null) {
-    presented = [record, sources, presentation];
-    setPresentation(record, presentation);
-    if (unavailable) {
-      const objectId = record && preparedFocusObjectId(record);
-      const missing = objectId && unavailableIds.has(objectId);
-      if (unavailable.hidden !== !missing) unavailable.hidden = !missing;
-      const message = missing ? `The 3D view of ${record.name} is unavailable in this installation. Catalogue facts remain available.` : '';
-      if (unavailable.textContent !== message) unavailable.textContent = message;
-    }
-    if (learnMore && !record) learnMore.hidden = true;
-    if (!record) return;
-    root.dataset.preparedFocusId = record.id;
-    for (const bank of find('[data-focus-record-bank]')) showSection(bank, bank.dataset.focusRecordBank === record.id);
-    const cluster = isPreparedCluster(record), nebula = isPreparedNebula(record);
-    const aliases = record.aliases.join(', ');
-    write('name', record.name);
-    write('aliases', aliases);
-    write('introduction', nebula ? record.introduction.text : aliases ? `Also known as ${aliases}` : '');
-    fields.introduction.hidden = !nebula && !aliases;
-    if (learnMore) {
-      const href = wikipediaLearnMoreUrl(record.name);
-      if (learnMore.getAttribute('href') !== href) learnMore.setAttribute('href', href);
-      learnMore.hidden = fields.introduction.hidden;
-    }
-    if (aliasesRow) aliasesRow.hidden = !nebula || !aliases;
-    // The trail leads to the level that holds the focus's classification (its overview's `holds`) where it lies.
-    const parent = overviewHoldingAt(catalogueClassification(record), record.positionM);
-    const parentScope = parent?.id;
-    for (const trail of breadcrumbs) trail.hidden = trail.dataset.focusBreadcrumbScope !== parentScope;
-    fields.status.hidden = nebula;
-    write('status', nebula ? '' : cluster ? record.classification.name : `${words(record.status)} galaxy`);
-    const distanceScale = record.distance.valuePc >= 1e6 ? 1e6 : record.distance.valuePc >= 1e3 ? 1e3 : 1;
-    write('distance', `${number.format(record.distance.valuePc / distanceScale)} ${distanceScale === 1e6 ? 'Mpc' : distanceScale === 1e3 ? 'kpc' : 'pc'}`);
-    const associationLabel = find('[data-focus-fact-label=association]')[0] ?? null;
-    if (associationLabel) associationLabel.textContent = cluster ? 'Redshift' : 'Association';
-    const distanceLabel = find('[data-focus-fact-label=distance]')[0] ?? null;
-    if (distanceLabel) distanceLabel.textContent = cluster ? 'Group distance' : 'Observer distance';
-    const { minusPc, plusPc, uncertainty } = record.distance;
-    write('uncertainty', uncertainty ? `${number.format(uncertainty.statisticalPc)} pc statistical; ${number.format(uncertainty.systematicPc)} pc systematic`
-      : minusPc !== undefined && plusPc !== undefined ? `−${number.format(minusPc)} / +${number.format(plusPc)} pc` : 'Not supplied');
-    if (fields.uncertainty.parentElement) fields.uncertainty.parentElement.hidden = !uncertainty && minusPc === undefined && plusPc === undefined;
-    if (fields.membership.parentElement) fields.membership.parentElement.hidden = cluster;
-    write('membership', cluster ? 'Galaxy cluster' : nebula ? parent?.name ?? '' : words(record.membership.group));
-    write('association', cluster ? `${record.redshift.value}` : nebula ? record.kind === 'globular-cluster' ? 'Galactic globular cluster' : 'Galactic nebula' : words(record.membership.subgroup));
-    for (const [index, link] of links.entries()) {
-      const source = sources[index];
-      link.hidden = !source;
-      if (sourceRows[index]) sourceRows[index].hidden = !source;
-      if (source) { link.href = source.url; link.textContent = source.citation; }
-      else { link.removeAttribute('href'); link.textContent = ''; }
-    }
-  }, adoptBanks() { adopt(); if (presented) card.set(...presented); }, destroy() { events.abort(); currentPresentation = null; presented = null; } };
-  return card;
-}
diff --git a/site/prepared-focus-target.mts b/site/prepared-focus-target.mts
deleted file mode 100644
index bb2e3f45c18..00000000000
--- a/site/prepared-focus-target.mts
+++ /dev/null
@@ -1,49 +0,0 @@
-import type { PreparedCatalogObject, SpatialCatalogSource, SpatialCitation } from '@cssearth/catalog';
-import type { PreparedFocusBank } from '@cssearth/renderer/universe/prepared-focus-bank.ts';
-import { preparedFocusObjectId, resolvePreparedFocus, preparedFocusCitations, resolvePreparedFocusDataset } from './prepared-focus.mts';
-import type { PreparedFocusPolicy } from './prepared-focus.mts';
-
-export interface PreparedFocusSource {
-  resolveGalaxy(id: string): PreparedCatalogObject | null;
-  focusBank(id: string): PreparedFocusBank | null;
-}
-
-/** One acquired target owns catalogue identity, framing, datasets and its residency pin. */
-export function acquirePreparedFocusTarget(id: string, { layer, policy, sources, unavailableObjectIds, onChange, onError }: {
-  layer: PreparedFocusSource; policy: PreparedFocusPolicy; sources(): readonly SpatialCatalogSource[];
-  unavailableObjectIds: readonly string[]; onChange(): void; onError(error: unknown): void;
-}) {
-  const record = layer.resolveGalaxy(id);
-  if (!record) throw new TypeError(`Unknown prepared galaxy focus: ${id}`);
-  const objectId = preparedFocusObjectId(record);
-  const unavailable = objectId !== undefined && unavailableObjectIds.includes(objectId);
-  const bank = objectId && !unavailable ? layer.focusBank(objectId) : null;
-  let released = false, citations: readonly SpatialCitation[] | undefined;
-  const unsubscribe = bank?.subscribe(() => { if (!released) onChange(); });
-  return {
-    id, record,
-    get datasets() { return bank?.state() ?? null; },
-    get focus() { return resolvePreparedFocus(record, bank?.framingRadiusM(), policy); },
-    get citations() { return citations ??= preparedFocusCitations(record, sources()); },
-    prepare({ preload = false }: { preload?: boolean } = {}): Promise<void> | undefined {
-      if (released || !bank || bank.state() && !preload) return;
-      const loading = bank.load();
-      // Explicit selections preload before flight. Restored image views can frame immediately
-      // from their descriptor and let visibility admit their layers, as other retained banks do.
-      if (bank.state()) {
-        void loading.catch(error => { if (!released) onError(error); });
-        return;
-      }
-      return loading.then(() => {
-        if (!released && !bank.state()) throw new TypeError(`Prepared focus bank did not become ready: ${bank.objectId}`);
-      });
-    },
-    resolveDataset(requested: string | null) {
-      if (!released) return resolvePreparedFocusDataset(requested, bank?.state() ?? null, unavailable);
-    },
-    selectDataset(dataset: string) { if (!released) bank?.selectDataset(dataset); },
-    release() { if (!released) { released = true; unsubscribe?.(); } },
-  };
-}
-
-export type PreparedFocusTarget = ReturnType<typeof acquirePreparedFocusTarget>;
diff --git a/site/prepared-focus.mts b/site/prepared-focus.mts
deleted file mode 100644
index a1975646053..00000000000
--- a/site/prepared-focus.mts
+++ /dev/null
@@ -1,46 +0,0 @@
-import { isPreparedCluster, isPreparedNebula, resolveSpatialCitation } from '@cssearth/catalog';
-import type { PreparedCatalogObject, SpatialCatalogSource } from '@cssearth/catalog';
-import type { PreparedNavigationFocus } from '@cssearth/renderer/navigation/prepared-focus.ts';
-import type { PreparedFocusDatasets } from '@cssearth/renderer/universe/prepared-focus-bank.ts';
-
-export interface PreparedFocusPolicy {
-  metersPerParsec: number; defaultFocusRadiusM: number; minimumDistanceRadii: number; maximumDistanceM: number;
-}
-export type PreparedFocusPresentation = PreparedFocusDatasets & { selectDataset(datasetId: string): void };
-
-/** The catalogue names the detailed package, independently of whether its bank is resident. */
-export function preparedFocusObjectId(record: PreparedCatalogObject): string | undefined {
-  return record.detailedObjectId;
-}
-
-export function resolvePreparedFocus(record: PreparedCatalogObject, bankRadiusM: number | undefined, policy: PreparedFocusPolicy): PreparedNavigationFocus {
-  const radius = record.presentation?.focusRadiusM ?? bankRadiusM ??
-    (!isPreparedCluster(record) && !isPreparedNebula(record) && record.halfLightRadius
-      ? record.halfLightRadius.valuePc * policy.metersPerParsec * 3 : policy.defaultFocusRadiusM);
-  return { id: record.id, positionM: record.positionM, framingRadiusM: radius,
-    limits: { minimumDistanceM: radius * policy.minimumDistanceRadii, maximumDistanceM: policy.maximumDistanceM } };
-}
-
-export function preparedFocusCitations(record: PreparedCatalogObject, sources: readonly SpatialCatalogSource[]) {
-  const references = [record.skyPosition.sourceRef, record.distance.sourceRef,
-    (isPreparedCluster(record) || isPreparedNebula(record) ? record.classification.sourceRef : record.membership.sourceRef)]
-    .filter((reference): reference is string => Boolean(reference));
-  return [...new Map(references.map(reference => {
-    const citation = resolveSpatialCitation(reference, sources);
-    if (!citation) throw new TypeError(`Unresolved prepared focus reference: ${reference}`);
-    return [citation.id, citation] as const;
-  })).values()];
-}
-
-/** An unavailable package still opens its catalogue facts, including from an older dataset link. */
-export function resolvePreparedFocusDataset(requested: string | null,
-  datasets: Pick<PreparedFocusDatasets, 'defaultDataset' | 'datasets'> | null, unavailable = false): string | undefined {
-  if (unavailable) return;
-  if (!datasets) {
-    if (requested !== null) throw new RangeError('Prepared focus datasets are unavailable.');
-    return;
-  }
-  const dataset = requested ?? datasets.defaultDataset;
-  if (!datasets.datasets.some(candidate => candidate.id === dataset)) throw new RangeError(`Unknown prepared focus dataset: ${dataset}`);
-  return dataset;
-}
diff --git a/site/prepared-panel-content.mts b/site/prepared-panel-content.mts
index e35c6575810..27f2f8ca5b2 100644
--- a/site/prepared-panel-content.mts
+++ b/site/prepared-panel-content.mts
@@ -108,7 +108,13 @@ function datasetControl(value: unknown): DatasetControl {
   // the marker to publish that dataset's legend beside this one's; without it the body is drawn in an unexplained scale.
   const volume = dataset.volume === undefined ? undefined : object(dataset.volume, 'dataset volume');
   const step = dataset.step === undefined ? undefined : object(dataset.step, 'dataset step');
+  // A dataset that is a bank's (a galaxy's image, a nebula's volume) publishes its own preview image; a body's dataset
+  // takes its preview from its surface minimap (PreparedObjectPanel.astro).
+  const texture = dataset.texture === undefined ? undefined : object(dataset.texture, 'dataset texture');
+  const attribution = texture?.attribution === undefined ? undefined : object(texture.attribution, 'texture attribution');
   return { id: text(dataset.id, 'dataset id'), label, thumbnailUrl: text(dataset.thumbnailUrl, 'dataset thumbnail'),
+    ...(texture === undefined ? {} : { texture: { url: text(texture.url, 'texture URL'), width: number(texture.width, 'texture width'), height: number(texture.height, 'texture height'),
+      attribution: attribution && { label: text(attribution.label, 'texture attribution'), url: optionalText(attribution.url, 'texture source') } } }),
     ...(noData === undefined ? {} : { noData }),
     ...(step === undefined ? {} : { step: { group: text(step.group, 'dataset step group'), label: text(step.label, 'dataset step label'),
       ...(step.autoplay === undefined ? {} : { autoplay: optionalBoolean(step.autoplay, 'dataset step autoplay') }),
diff --git a/site/prepared-world-navigation.mts b/site/prepared-world-navigation.mts
index 1213ab25bd9..7d53f6678d4 100644
--- a/site/prepared-world-navigation.mts
+++ b/site/prepared-world-navigation.mts
@@ -178,7 +178,6 @@ export function createPreparedWorldNavigation({ objects, motion = createCameraMo
       const target = targetWorldCamera ?? selectionTarget(from, frame, optics, objectId);
       const flight = createSelectionFlight({ from: from.pose, to: target.pose, focusPositionM: targetFocusPositionM ?? frame.originM,
         durationS: centerSelection ? CENTER_SELECTION_DURATION_SECONDS : undefined });
-      owner.setPreparedFocus?.(null);
       const running = createWorldFlight({ motion, owner, from, flight,
         targetProjectionScale: target.projectionScale,
         anchors: [{ positionM: frame.originM, radiusM: frame.bodyRadiusM }], signal, reducedMotion,
@@ -198,7 +197,6 @@ export function createPreparedWorldNavigation({ objects, motion = createCameraMo
       const from = source?.capture() ?? lastCamera;
       const optics = source?.optics() ?? lastOptics;
       if (!from || !optics) throw new Error('The drawn world camera is not ready.');
-      source?.setPreparedFocus?.(null);
       lastCamera = from; lastOptics = optics;
       if (preserveView) {
         // Input stays live while the new detail bank loads. Snapshot the last
diff --git a/site/scene/scene-publication.mts b/site/scene/scene-publication.mts
index 69a2e2d953e..447eec004fe 100644
--- a/site/scene/scene-publication.mts
+++ b/site/scene/scene-publication.mts
@@ -42,7 +42,7 @@ export function createScenePublication({ stage, documentTarget, windowTarget, re
     return { sceneState, playing, playback, scene: Object.freeze({
       activeObjectId: objectId,
       selectedObjectId: selected.kind === 'object' ? selected.objectId
-        : selected.kind === 'satellite-system' ? selected.hostId : selected.kind === 'focus' ? selected.id : null,
+        : selected.kind === 'satellite-system' ? selected.hostId : null,
       overview: selected.kind === 'overview',
       error: state.kind === 'failed' ? state.error.message : null,
       lifecycle: sceneState === 'ready' ? (playing ? 'mounted' : 'paused') : sceneState,
diff --git a/site/scene/scene-router.mts b/site/scene/scene-router.mts
index 9896eb5cf87..71fba45059c 100644
--- a/site/scene/scene-router.mts
+++ b/site/scene/scene-router.mts
@@ -26,7 +26,6 @@ import { createWorldViewport } from '../world-viewport.mts';
 import type { createSceneSelection, SceneSubject } from './scene-selection.mts';
 import type { createSceneActivation } from './scene-activation.mts';
 import { createCameraMotion } from '@cssearth/renderer/navigation';
-import { readInitialFocus } from '../focus-catalog.mts';
 import { drawnPageFromUrl, isOverviewPage, WORLD_HOST_ID } from '../navigation/navigation-scope.mts';
 import { createNavigationTiming } from '../navigation/navigation-timing.mts';
 import { retainInitialScene } from '../initial-scene.mts';
@@ -127,19 +126,6 @@ export function createSceneRouter({
     onMount(value) {
       preferences.apply(value);
     },
-    onSelectFocus(id) { void navigate(objectId, { kind: 'focus', id }).catch(report); },
-    canPublishFocus: () => scenes.state.kind === 'ready' && !requests.current,
-    readFocus() { const current = subject(); return current.kind === 'focus' ? current.id : null; },
-    onFocusChange(session, focus) {
-      const selection = context?.selection;
-      if (!selection) return;
-      selection.focus(focus.record, focus.sources, focus.presentation);
-      if (focus.url === 'preserve') return;
-      const url = new URL(navigationHref(windowTarget));
-      if (focus.url === 'reframe') url.searchParams.delete('v');
-      const selected = selection.url(url);
-      if (selected !== navigationHref(windowTarget)) view.replace(session, selected);
-    },
     onCameraChange: followSelectionCamera,
     onError: report,
   });
@@ -334,8 +320,7 @@ export function createSceneRouter({
       const objects = registry.WORLD_OBJECTS, worldIds = new Set(objects.map(object => object.id));
       const navigation = registry.createPreparedWorldNavigation({ objects: registry.SCENE_OBJECTS, motion: cameraMotion, windowTarget, documentTarget });
       const selection = registry.createSceneSelection({ objectId, systems: objects,
-        initial: registry.selectionTargetFromUrl(new URL(windowTarget.location?.href ?? 'https://example.test'), objectId, objects),
-        initialFocus: readInitialFocus(documentTarget), onChange: publishSelection });
+        initial: registry.selectionTargetFromUrl(new URL(windowTarget.location?.href ?? 'https://example.test'), objectId, objects), onChange: publishSelection });
       const activation = registry.createSceneActivation({ windowTarget, navigation, view, isCurrent: scenes.isCurrent, getReducedMotion: () => reducedMotionActive });
       if (windowTarget.location?.href && !destroyed) {
         // Only a settled scene belongs to the entry that history names. An unfinished navigation
@@ -344,7 +329,7 @@ export function createSceneRouter({
         // A link flies in place to any body the world draws; one whose entry has loaded must also share this frame.
         unbindLinks = bindNavigationLinks({ documentTarget, windowTarget, navigable: id => navigable(id), navigate, onError: report });
       }
-      navigable = id => isOverviewPage(id) || registry.knownObject(id)?.kind === 'prepared-focus' || worldIds.has(id) && (!registry.knownObject(id) || navigation.supports(objectId, id));
+      navigable = id => isOverviewPage(id) || worldIds.has(id) && (!registry.knownObject(id) || navigation.supports(objectId, id));
       if (destroyed) navigation.destroy();
       return context = { registry, objects, navigation, selection, activation };
     });
@@ -392,11 +377,8 @@ export function createSceneRouter({
       await firstMount.catch(() => undefined);
       if (destroyed) return false;
     }
-    if (intent.kind === 'focus' && scenes.current) id = objectId;
-    else if (id !== objectId) {
-      // A page of something the world draws (a link or history entry) opens on its scene (navigation-scope.mts): an
-      // overview's is the world's host, as zooming out reaches it; a catalogue focus is drawn by the mounted scene, or by
-      // the host on the first mount.
+    if (id !== objectId) {
+      // A level's page (a link or history entry) opens on the world's host, as zooming out reaches it (navigation-scope.mts).
       const { registry, objects } = await ensureContext();
       if (destroyed) return false;
       // A flight to another body reads its entry, system view, card and object transport. All four start now, together:
@@ -406,10 +388,7 @@ export function createSceneRouter({
         startFlightRequest(preparedObjectUrl(id, 'prepared/object.json'));
         if (intent.kind !== 'feature') void registry.loadSystemView(id).catch(() => {});
       }
-      const focus = !isOverviewPage(id) && (registry.knownObject(id) ?? await registry.loadObject(id).catch(() => null))?.kind === 'prepared-focus';
-      if (destroyed) return false;
       if (isOverviewPage(id)) id = WORLD_HOST_ID;
-      else if (focus) id = scenes.current ? objectId : WORLD_HOST_ID;
     }
     // Entry and system-view reads may finish in any order. Only the latest selection can start a flight.
     const ready = await readiness.prepare(id, intent.kind !== 'feature');
@@ -420,7 +399,7 @@ export function createSceneRouter({
     if (!object) return false;
     const source = scenes.current;
     const resolved = resolveNavigation(intent, { object, objects, navigation: routes, current: {
-      objectId, href: intent.kind === 'focus' ? source?.url ?? navigationHref(windowTarget) : navigationHref(windowTarget), subject: current.current,
+      objectId, href: navigationHref(windowTarget), subject: current.current,
       centeredObjectId, hasPresented, reuseScene: !!source && objectId === id && scenes.state.kind === 'ready',
       mount: source?.mount ?? null, pending: requests.current,
     } });
@@ -431,7 +410,7 @@ export function createSceneRouter({
     requests.cancel();
     scenes.current?.setViewUrl(null);
     const request = requests.begin({ ...resolved.destination, timing: createNavigationTiming(windowTarget, objectId, id) });
-    if (request.camera.kind === 'focus' || request.camera.kind === 'surface' || request.feature) preferences.set('motionEnabled', false);
+    if (request.camera.kind === 'surface' || request.feature) preferences.set('motionEnabled', false);
     mountTask = transition(ready, request, object);
     return mountTask;
   }
@@ -444,25 +423,17 @@ export function createSceneRouter({
         const release = source?.mount?.navigation?.holdPresentation?.();
         if (release) request.own(release);
       }
-      if (request.subject.kind !== 'focus') {
-        world.current?.previewSelection?.(request.subject.kind === 'overview' ? null : object.id);
-        request.own(() => {
-          if (!requests.current || requests.owns(request)) world.current?.previewSelection?.();
-        });
-      }
-      const selectionTransition = request.subject.kind === 'focus' ? null : shellOwner?.shell?.beginNavigation?.(request.subject.kind === 'overview'
+      world.current?.previewSelection?.(request.subject.kind === 'overview' ? null : object.id);
+      request.own(() => {
+        if (!requests.current || requests.owns(request)) world.current?.previewSelection?.();
+      });
+      const selectionTransition = shellOwner?.shell?.beginNavigation?.(request.subject.kind === 'overview'
         ? { kind: 'overview', overview: request.subject.overview,
           preview: request.camera.kind === 'frame' && request.camera.framing === 'center' }
         : { kind: request.subject.kind === 'satellite-system' ? 'satellite-system' : 'object', object,
           targetWorldCamera: request.camera.kind === 'frame' ? request.camera.world ?? undefined : undefined });
       if (selectionTransition) request.own(() => selectionTransition.dispose());
       if (source && request.scene === 'reuse') {
-        if (request.camera.kind === 'focus') {
-          // A cold detail is ready before its shared world; explicit focus waits for that owner.
-          const contextual = await request.lifetime.wait(world.ensure());
-          if (contextual.cancelled || !requests.owns(request) || !scenes.isCurrent(source)) return false;
-          world.connect(source);
-        }
         return await focusExistingScene({ session: source, request, selectionTransition, navigation, requests, view,
           windowTarget, getReducedMotion: () => reducedMotionActive,
           commitSelection: (request, transition) => commitSelection(ready, request, transition),
@@ -496,13 +467,10 @@ export function createSceneRouter({
         source.shell?.setDatasetNotice?.(errorMessage(error));
         // Input can take over a same-owner selection flight before arrival. The
         // selected destination still owns that camera: keep only the drawn view
-        // from the departed URL, otherwise its old prepared focus is restored
-        // and pulls the camera back to the object the user just left.
+        // from the departed URL, otherwise its saved camera is restored
+        // and pulls the view back to the object the user just left.
         const snapshot = view.capture(interruptedSelection ? request.url : undefined);
-        // A failed focus load leaves the previous native target in place. Recover
-        // its identity with the drawn camera instead of retrying the failed URL.
-        const captured = snapshot && request.camera.kind === 'focus'
-          ? selection.url(new URL(snapshot, navigationHref(windowTarget))) : snapshot;
+        const captured = snapshot;
         if (captured && interruptedSelection) {
           const selected = new URL(captured, navigationHref(windowTarget)).href;
           source.url = selected;
@@ -609,7 +577,7 @@ export function createSceneRouter({
     if (stage.dataset) {
       const current = subject ?? { kind: 'object' as const, objectId };
       const value = current.kind === 'overview' ? current.overview.scope
-        : current.kind === 'focus' ? current.id : current.kind === 'satellite-system' ? current.hostId : current.objectId;
+        : current.kind === 'satellite-system' ? current.hostId : current.objectId;
       if (stage.dataset.selection !== value) stage.dataset.selection = value;
     }
     publication.publish();
@@ -640,11 +608,7 @@ export function createSceneRouter({
       getOverview: () => current.context.kind === 'overview',
       // The pending flight owns the camera; repeat-click bookkeeping must not
       // suppress zoom-out deselection after that flight has finished.
-      // A focus the URL names is a selection from the moment it is named, before
-      // its prepared bank has loaded and the runtime can report it. The camera
-      // scale must not deselect it during that window.
-      isAvailable: () => scenes.isCurrent(session) && scenes.state.kind === 'ready' && !requests.current
-        && current.current.kind !== 'focus' && !categoryFlight,
+      isAvailable: () => scenes.isCurrent(session) && scenes.state.kind === 'ready' && !requests.current && !categoryFlight,
       windowTarget,
       onChange(next) {
         if (!next.overview || next.objectId === objectId) {
@@ -672,8 +636,7 @@ export function createSceneRouter({
     const current = ready.selection;
     session.own(watchSatelliteSelection({ navigation: owner, objects: ready.registry.SCENE_OBJECTS,
       getSelection: () => current.context,
-      isAvailable: () => scenes.isCurrent(session) && scenes.state.kind === 'ready' && !requests.current
-        && current.current.kind !== 'focus',
+      isAvailable: () => scenes.isCurrent(session) && scenes.state.kind === 'ready' && !requests.current,
       documentTarget, windowTarget,
       onChange(next) {
         if (next.kind === 'satellite-system' && next.hostId !== objectId) {
diff --git a/site/scene/scene-selection.mts b/site/scene/scene-selection.mts
index 90417e92d30..0ebcc97f337 100644
--- a/site/scene/scene-selection.mts
+++ b/site/scene/scene-selection.mts
@@ -1,8 +1,6 @@
-import type { PreparedCatalogObject, SpatialCitation } from '@cssearth/catalog';
-import type { PreparedFocusPresentation } from '../prepared-focus.mts';
 import type { WorldCameraPose } from '@cssearth/renderer/navigation/world-camera.ts';
 import { overviewScopeAtCamera, type OverviewScope } from '../overview-context.mts';
-import { overviewScopeFromUrl, preparedFocusFromUrl, satelliteSystemFromUrl, withOverviewScope, withPreparedFocus, withSatelliteSystemView } from '../navigation/navigation-scope.mts';
+import { overviewScopeFromUrl, satelliteSystemFromUrl, withOverviewScope, withSatelliteSystemView } from '../navigation/navigation-scope.mts';
 import { SOLAR_SYSTEM_ID, systemById, type SystemObjects } from '../object-systems.mts';
 import { satelliteSystemByHost } from '../satellite-systems.mts';
 import { SYSTEM_RANGES } from '../system-framing.mts';
@@ -12,23 +10,14 @@ export type SceneContext =
   | { readonly kind: 'object'; readonly objectId: string }
   | { readonly kind: 'satellite-system'; readonly hostId: string }
   | { readonly kind: 'overview'; readonly overview: SceneOverview };
-export type SelectionTarget = SceneContext | { readonly kind: 'focus'; readonly id: string };
-export type SceneSubject = SceneContext | {
-  readonly kind: 'focus'; readonly id: string;
-  readonly record: PreparedCatalogObject | null;
-  readonly sources: readonly SpatialCitation[];
-  readonly presentation: PreparedFocusPresentation | null;
-  /** The underlying camera context is restored when the native focus clears. */
-  readonly context: SceneContext;
-};
+export type SelectionTarget = SceneContext;
+export type SceneSubject = SceneContext;
 
 export function selectionContext(subject: SceneSubject): SceneContext {
-  return subject.kind === 'focus' ? subject.context : subject;
+  return subject;
 }
 
 export function selectionTargetFromUrl(url: URL, objectId: string, objects: SystemObjects): SelectionTarget {
-  const focus = preparedFocusFromUrl(url, objectId);
-  if (focus !== null) return { kind: 'focus', id: focus };
   if (satelliteSystemFromUrl(url) && satelliteSystemByHost(objectId)) return { kind: 'satellite-system', hostId: objectId };
   const scope = overviewScopeFromUrl(url, objectId);
   return scope ? { kind: 'overview', overview: { scope, systemId: systemById(objects, objectId)?.id ?? SOLAR_SYSTEM_ID } }
@@ -38,7 +27,6 @@ export function selectionTargetFromUrl(url: URL, objectId: string, objects: Syst
 /** Identity used by navigation rows, source links and per-selection reading positions. */
 export function selectionKey(subject: SelectionTarget): string {
   switch (subject.kind) {
-    case 'focus': return `focus:${subject.id}`;
     case 'object': return `object:${subject.objectId}`;
     case 'satellite-system': return `satellite-system:${subject.hostId}`;
     case 'overview': return `overview:${subject.overview.scope === 'system' ? `system:${subject.overview.systemId}` : subject.overview.scope}`;
@@ -46,60 +34,39 @@ export function selectionKey(subject: SelectionTarget): string {
 }
 
 /** One committed subject. Mounted scene ownership and temporary browsing/flight previews remain independent. */
-export function createSceneSelection({ initial, objectId, initialFocus = null, systems = [], onChange }: {
-  initial: SelectionTarget; objectId: string; initialFocus?: PreparedCatalogObject | null;
+export function createSceneSelection({ initial, objectId, systems = [], onChange }: {
+  initial: SelectionTarget; objectId: string;
   /** The world's bodies, for a system overview's star: its overview is left by the distance from that star. */
   systems?: SystemObjects;
   onChange(): void;
 }) {
-  // The mounted scene: a URL that selects no focus is on its page.
+  // The mounted scene.
   let scene = objectId;
-  let subject: SceneSubject = initial.kind === 'focus'
-    ? { ...initial, record: initialFocus?.id === initial.id ? initialFocus : null, sources: [], presentation: null,
-      context: { kind: 'object', objectId } } : initial;
+  let subject: SceneSubject = initial;
   function publish(next: SceneSubject, notify = true) {
     if (subject === next) return false;
     subject = next; if (notify) onChange(); return true;
   }
   return {
     get current() { return subject; },
-    get context() { return selectionContext(subject); },
+    get context() { return subject; },
     /** Navigation binds incoming content before its single explicit publication. */
     commit(target: SelectionTarget, mountedObjectId: string, notify = true) {
       scene = mountedObjectId;
-      if (target.kind !== 'focus') {
-        return selectionKey(target) === selectionKey(subject) ? false : publish(target, notify);
-      }
-      const context = selectionContext(subject);
-      const host = context.kind === 'object' ? context.objectId
-        : context.kind === 'satellite-system' ? context.hostId : context.overview.systemId;
-      const retained = subject.kind === 'focus' && subject.id === target.id ? subject : null;
-      if (retained && host === mountedObjectId) return false;
-      return publish({ ...target, record: retained?.record ?? null, sources: retained?.sources ?? [], presentation: retained?.presentation ?? null,
-        context: host === mountedObjectId ? context : { kind: 'object', objectId: mountedObjectId } }, notify);
-    },
-    focus(record: PreparedCatalogObject | null, sources: readonly SpatialCitation[], presentation: PreparedFocusPresentation | null) {
-      return publish(record ? { kind: 'focus', id: record.id, record, sources, presentation, context: selectionContext(subject) }
-        : selectionContext(subject));
+      return selectionKey(target) === selectionKey(subject) ? false : publish(target, notify);
     },
     followCamera(world: WorldCameraPose) {
-      const context = selectionContext(subject);
+      const context = subject;
       if (context.kind !== 'overview') return false;
       const star = systemById(systems, context.overview.systemId);
       const scope = overviewScopeAtCamera(world, context.overview.scope, undefined,
         star ? { originM: star.originM, orbitsWithinM: SYSTEM_RANGES.get(star.id) } : undefined);
       if (scope === context.overview.scope) return false;
-      const next: SceneContext = { kind: 'overview', overview: { ...context.overview, scope } };
-      return publish(subject.kind === 'focus' ? { ...subject, context: next } : next);
+      return publish({ kind: 'overview', overview: { ...context.overview, scope } });
     },
     /** Project the committed identity while preserving camera, dataset and diagnostic URL payloads. */
     url(value: string | URL) {
-      const url = new URL(value);
-      if (subject.kind === 'focus') {
-        const dataset = subject.presentation?.selectedDataset ?? (preparedFocusFromUrl(url, scene) === subject.id ? url.searchParams.get('dataset') : null);
-        return withPreparedFocus(url, scene, subject.id, dataset).href;
-      }
-      return withSatelliteSystemView(withOverviewScope(withPreparedFocus(url, scene, null, null), scene,
+      return withSatelliteSystemView(withOverviewScope(new URL(value), scene,
         subject.kind === 'overview' ? subject.overview.scope : null), subject.kind === 'satellite-system').href;
     },
   };
diff --git a/site/scene/scene-transition.mts b/site/scene/scene-transition.mts
index fc027681cb4..ab0cc4cdeed 100644
--- a/site/scene/scene-transition.mts
+++ b/site/scene/scene-transition.mts
@@ -51,31 +51,26 @@ export async function focusExistingScene({ session, request, selectionTransition
   const { camera } = request;
   const reducedMotion = getReducedMotion();
   let fly: (() => void | Promise<void>) | undefined;
-  if (camera.kind === 'focus') {
-    if (!view.commit(request, session)) return false;
-    fly = () => view.focus(session, request);
-  } else {
-    if (camera.kind === 'restore') {
-      if (request.history.history === 'pop' || request.url !== navigationHref(windowTarget)) view.commit(request, session);
-      else session.url = request.url;
-    }
-    // Saved history can fly to its endpoint before exact restoration at arrival.
-    const savedWorld = camera.kind === 'restore' && camera.animate && !reducedMotion
-      ? navigation.savedTarget?.({ objectId: session.objectId, url: request.url, mount: session.mount }) : null;
-    if (camera.kind === 'frame' || savedWorld) {
-      fly = () => navigation.focus({ objectId: session.objectId, mount: session.mount!, signal: request.signal,
-        reducedMotion, timing: request.timing,
-        targetWorldCamera: camera.kind === 'frame' ? camera.world ?? undefined : savedWorld!,
-        targetFocusPositionM: camera.kind === 'frame' ? camera.focusPositionM ?? undefined : undefined,
-        centerSelection: camera.kind === 'frame' && camera.framing === 'center' });
-    }
+  if (camera.kind === 'restore') {
+    if (request.history.history === 'pop' || request.url !== navigationHref(windowTarget)) view.commit(request, session);
+    else session.url = request.url;
+  }
+  // Saved history can fly to its endpoint before exact restoration at arrival.
+  const savedWorld = camera.kind === 'restore' && camera.animate && !reducedMotion
+    ? navigation.savedTarget?.({ objectId: session.objectId, url: request.url, mount: session.mount }) : null;
+  if (camera.kind === 'frame' || savedWorld) {
+    fly = () => navigation.focus({ objectId: session.objectId, mount: session.mount!, signal: request.signal,
+      reducedMotion, timing: request.timing,
+      targetWorldCamera: camera.kind === 'frame' ? camera.world ?? undefined : savedWorld!,
+      targetFocusPositionM: camera.kind === 'frame' ? camera.focusPositionM ?? undefined : undefined,
+      centerSelection: camera.kind === 'frame' && camera.framing === 'center' });
   }
   if (fly) {
     requests.advance(request, 'flying'); syncPlayback();
     const flown = await request.lifetime.wait(fly());
     if (flown.cancelled || !requests.owns(request)) return false;
   }
-  if (camera.kind !== 'focus') commitSelection(request, selectionTransition);
+  commitSelection(request, selectionTransition);
   if (!await view.arrive(session, { request })) return false;
   finishArrival(session, request);
   return true;
@@ -107,7 +102,7 @@ export function prepareSceneReplacement({ fromId, source, object, request, navig
   const factoryTask = contentTransport.descriptor(object, { signal: request.signal })
     .then(descriptor => loadObject(object.id, descriptor, request.signal))
     .then(async factory => {
-      if (factory.navigation && request.subject.kind !== 'overview' && request.subject.kind !== 'focus') {
+      if (factory.navigation && request.subject.kind !== 'overview') {
         const framingScale = await factory.navigation.framingScale(request.signal);
         const edge = await factory.navigation.labelEdge?.(request.signal);
         if (systemTask) await systemTask;
diff --git a/site/scene/scene-view.mts b/site/scene/scene-view.mts
index eb9d765a405..cdfb78c5a1b 100644
--- a/site/scene/scene-view.mts
+++ b/site/scene/scene-view.mts
@@ -61,18 +61,6 @@ export function createSceneView({ windowTarget, scenes, requests, getHistory, ge
     session.shell?.setDatasetNotice?.(null);
   }
 
-  function applyFocus(session: SceneSession, url: string, request?: NavigationRequest, frame = false) {
-    const binding = session.viewUrl;
-    const isCurrent = () => scenes.isCurrent(session) && session.viewUrl === binding && (request ? requests.owns(request) : !requests.current);
-    if (!isCurrent()) return;
-    const world = getWorld();
-    if (!world) return;
-    return world.applyFocus(url, { sceneId: session.objectId,
-      signal: request ? AbortSignal.any([session.signal, request.signal]) : session.signal,
-      isCurrent, frame, reducedMotion: !frame || windowTarget.matchMedia?.('(prefers-reduced-motion: reduce)').matches === true,
-    });
-  }
-
   /** One arrival path for initial mounts, replacement scenes, retained scenes and recovery. */
   async function arrive(session: SceneSession, { request, interrupted = false }: {
     request?: NavigationRequest; interrupted?: boolean;
@@ -81,9 +69,8 @@ export function createSceneView({ windowTarget, scenes, requests, getHistory, ge
     if (!owns()) return false;
     if (request) {
       if (!requests.advance(request, 'committing')) return false;
-      // Saved history and explicit focus publish before flight. Their native
-      // focus/dataset result may already have updated the committed URL.
-      if (request.scene === 'replace' || (request.camera.kind !== 'restore' && request.camera.kind !== 'focus')) {
+      // Saved history publishes before flight.
+      if (request.scene === 'replace' || request.camera.kind !== 'restore') {
         if (!commit(request, session)) return false;
       }
     }
@@ -119,21 +106,10 @@ export function createSceneView({ windowTarget, scenes, requests, getHistory, ge
       } catch (error) { if (current()) onError(error); }
     }
     if (!current()) return false;
-    // An explicit focus request has already flown and published its native result.
-    if (request?.camera.kind !== 'focus') {
-      try {
-        const focused = await wait(applyFocus(session, href, request));
-        if (focused.cancelled || !current()) return false;
-      } catch (error) {
-        if (!restore) throw error;
-        if (current()) onError(error);
-      }
-    }
     if (!current()) return false;
     owner?.start(incoming);
     return true;
   }
 
-  return { capture, commit, replace, syncDataset, arrive,
-    focus: (session: SceneSession, request: NavigationRequest) => applyFocus(session, request.url, request, true) };
+  return { capture, commit, replace, syncDataset, arrive };
 }
diff --git a/site/scene/scene-world.mts b/site/scene/scene-world.mts
index f6a84a1d411..b77cc2f52e7 100644
--- a/site/scene/scene-world.mts
+++ b/site/scene/scene-world.mts
@@ -1,7 +1,6 @@
 import type { createApplicationWorldContext } from '../application-world-context.mts';
 import type { BrowserWindow } from '../browser/browser-types.mts';
 import type { SceneSession } from './scene-session.mts';
-import type { FocusPublication } from '../prepared-context-navigation.mts';
 import type { WorldCameraPose } from '@cssearth/renderer/navigation/world-camera.ts';
 
 /** The world's code loads when the world does (`scene-router.mts`); its viewport exists from the start. */
@@ -18,16 +17,12 @@ interface SceneWorldOptions {
   windowTarget: BrowserWindow;
   isCurrent(session: SceneSession): boolean;
   onMount(world: WorldContextMount): void;
-  onSelectFocus(id: string): void;
-  canPublishFocus(): boolean;
-  readFocus(): string | null;
-  onFocusChange(session: SceneSession, publication: FocusPublication): void;
   onCameraChange(session: SceneSession, world: WorldCameraPose): void;
   onError(error: unknown): void;
 }
 
 /** The world survives detail replacement; each detail owns only its connections to it. */
-export function createSceneWorld({ owner, stage, windowTarget, isCurrent, onMount, onSelectFocus, canPublishFocus, onFocusChange, readFocus, onCameraChange, onError }: SceneWorldOptions) {
+export function createSceneWorld({ owner, stage, windowTarget, isCurrent, onMount, onCameraChange, onError }: SceneWorldOptions) {
   type WorldState = { kind: 'idle' } | { kind: 'loading'; controller: AbortController; task: Promise<WorldContextMount> }
     | { kind: 'ready'; world: WorldContextMount };
   let state: WorldState = { kind: 'idle' };
@@ -44,7 +39,7 @@ export function createSceneWorld({ owner, stage, windowTarget, isCurrent, onMoun
     // Register the loading owner before invoking mount, including synchronous callbacks.
     const task = Promise.resolve().then(() => {
       if (controller.signal.aborted) throw controller.signal.reason;
-      return owner.mount({ stage, viewport: sharedViewport(), signal: controller.signal, windowTarget, onSelectFocus });
+      return owner.mount({ stage, viewport: sharedViewport(), signal: controller.signal, windowTarget });
     }).then(value => {
       if (controller.signal.aborted) {
         value?.destroy?.();
@@ -106,12 +101,6 @@ export function createSceneWorld({ owner, stage, windowTarget, isCurrent, onMoun
     session.own(() => { if (connectedSession === session) connectedSession = null; });
     session.framePresenter?.attach?.(world);
     world.selectObject?.(session.objectId, navigation.frame, navigation.framingScale, navigation.labelEdge);
-    const disconnectFocus = world.connectNavigation?.(navigation, {
-      readFocus,
-      onFocusChange(publication) { if (isCurrent(session)) onFocusChange(session, publication); },
-      canPublish: () => isCurrent(session) && canPublishFocus(),
-    });
-    if (disconnectFocus) session.own(disconnectFocus);
     session.own(navigation.subscribe(frame => {
       if (isCurrent(session) && mounted() === world) onCameraChange(session, frame);
     }));
diff --git a/site/search/catalogue-index.mts b/site/search/catalogue-index.mts
index b0f04fa291c..d20d16608eb 100644
--- a/site/search/catalogue-index.mts
+++ b/site/search/catalogue-index.mts
@@ -3,7 +3,7 @@ import { isRecord } from '@cssearth/core';
 /** One search result row as the find function sends it: what the row shows and where it leads. A `system` row leads to a
  * planetary system's overview and is drawn with its star's marker. */
 export interface CatalogueRow {
-  readonly kind: 'scene' | 'prepared-focus' | 'system';
+  readonly kind: 'scene' | 'system';
   readonly id: string;
   readonly name: string;
   readonly classificationName: string;
@@ -18,7 +18,7 @@ export interface CatalogueRow {
   readonly source: Readonly<{ subject: string; document: string; label: string }>;
   readonly marker: Readonly<
     { kind: 'scene'; id: string; color: string }
-    | { kind: 'focus'; thumbnail: string | null }
+    | { kind: 'thumbnail'; thumbnail: string | null }
   >;
 }
 
@@ -43,7 +43,7 @@ const text = (value: unknown, label: string) => {
 
 /** Validate one row of a find response before it reaches the retained result list. */
 export function parseCatalogueRow(input: unknown, index: number): CatalogueRow {
-  if (!isRecord(input) || (input.kind !== 'scene' && input.kind !== 'prepared-focus' && input.kind !== 'system') || !isRecord(input.detail)
+  if (!isRecord(input) || (input.kind !== 'scene' && input.kind !== 'system') || !isRecord(input.detail)
       || !isRecord(input.source) || !isRecord(input.marker)) {
     throw new TypeError(`Invalid object catalogue row: ${index}.`);
   }
@@ -57,11 +57,10 @@ export function parseCatalogueRow(input: unknown, index: number): CatalogueRow {
   if ((detail.value === undefined) !== (detail.unit === undefined)) throw new TypeError(`Catalogue detail parts are incomplete: ${index}.`);
   const marker = input.marker.kind === 'scene'
     ? { kind: 'scene' as const, id: text(input.marker.id, 'marker id'), color: text(input.marker.color, 'marker color') }
-    : input.marker.kind === 'focus' && (input.marker.thumbnail === null || typeof input.marker.thumbnail === 'string')
-      ? { kind: 'focus' as const, thumbnail: input.marker.thumbnail }
+    : input.marker.kind === 'thumbnail' && (input.marker.thumbnail === null || typeof input.marker.thumbnail === 'string')
+      ? { kind: 'thumbnail' as const, thumbnail: input.marker.thumbnail }
       : null;
   if (!marker) throw new TypeError(`Invalid object catalogue marker: ${index}.`);
-  if ((input.kind !== 'prepared-focus') !== (marker.kind === 'scene')) throw new TypeError(`Object catalogue marker kind changed: ${index}.`);
   return Object.freeze({
     kind: input.kind,
     id: text(input.id, 'id'),
diff --git a/site/search/object-result.mts b/site/search/object-result.mts
index 71b4db031c5..3133e093730 100644
--- a/site/search/object-result.mts
+++ b/site/search/object-result.mts
@@ -38,7 +38,7 @@ function renderMarker(documentTarget: Document, entry: ObjectResultEntry) {
     return image;
   }
   const marker = documentTarget.createElement('span');
-  if (entry.marker.kind === 'focus') {
+  if (entry.marker.kind === 'thumbnail') {
     marker.className = `object-navigation-marker ${entry.marker.thumbnail ? 'context-navigation-thumbnail' : 'catalog-navigation-marker'}`;
     marker.setAttribute('aria-hidden', 'true');
     if (entry.marker.thumbnail) {
@@ -102,7 +102,6 @@ export function bindObjectResultView(documentTarget: Document, view: ObjectResul
   anchor.dataset.sourceLabel = entry.source.label;
   // A system row is a plain link to the system's overview, as the object list's overview rows are.
   if (entry.kind === 'scene') anchor.dataset.objectId = entry.id; else delete anchor.dataset.objectId;
-  if (entry.kind === 'prepared-focus') anchor.dataset.preparedFocusId = entry.id; else delete anchor.dataset.preparedFocusId;
   const selected = selection?.kind === entry.kind && selection.id === entry.id;
   anchor.classList.toggle('is-active', selected);
   if (selected) anchor.setAttribute('aria-current', 'page');
diff --git a/site/search/prepared-catalogue-index.mts b/site/search/prepared-catalogue-index.mts
index 849c95dff3d..7105e9122c3 100644
--- a/site/search/prepared-catalogue-index.mts
+++ b/site/search/prepared-catalogue-index.mts
@@ -1,13 +1,18 @@
 import { designationNames } from './object-search.mts';
-import { distanceDescription, isSceneObject } from '@cssearth/objects';
-import { FOCUS_SOURCE_DOCUMENTS } from '../focus-catalog-data.mts';
-import { objectClassificationLabel, objectTypeLabel, SEARCH_OBJECTS } from './search-objects.mts';
+import { distanceDescription } from '@cssearth/objects';
+import { objectTypeLabel, SEARCH_OBJECTS } from './search-objects.mts';
 import { sidebarThumbnail } from '../sidebar-thumbnails.mts';
+import { PREPARED_NAVIGATION_MARKERS } from '../prepared-navigation-markers.mjs';
 import { sourceDocumentation, systemSourceDocumentation } from '../source-documentation.mts';
 import { allPlanetarySystems } from '../object-systems.mts';
 import { SCENE_OBJECTS } from '../objects.mts';
 import type { CatalogueIndex, CatalogueIndexEntry } from './catalogue-index.mts';
 
+/** A result row shows an object by its marker. */
+export function objectResultMarker(object: { readonly id: string; readonly color: string }) {
+  return Object.freeze({ kind: 'scene' as const, id: object.id, color: object.color });
+}
+
 /** Every object search can list. The build writes it once (`pages/catalogue/index.json.ts`); the find function reads
  * that file, matches and orders it, and a browser receives only the rows it shows. */
 export function preparedCatalogueIndex(): CatalogueIndex {
@@ -15,45 +20,24 @@ export function preparedCatalogueIndex(): CatalogueIndex {
     schema: 'cssearth-catalogue-index@1',
     entries: Object.freeze([...SEARCH_OBJECTS.map((object): CatalogueIndexEntry => {
       const title = distanceDescription(object.distance);
-      if (isSceneObject(object)) {
-        const source = sourceDocumentation(object.id, object.name);
-        const value = String(Number(object.distance.value.toFixed(3)));
-        return Object.freeze({
-          kind: object.kind,
-          id: object.id,
-          name: object.name,
-          searchNames: Object.freeze(designationNames(object.id, object.name)),
-          classification: object.classification,
-          classificationName: objectTypeLabel(object).toLocaleLowerCase('en'),
-          systemName: object.systemName.toLocaleLowerCase('en'),
-          route: object.route,
-          illustration: object.discovery.illustration,
-          distanceMeters: object.distance.meters,
-          // A search row always states the distance; what kind of model draws it is the object page's business.
-          detail: Object.freeze({ text: `${value} ${object.distance.unit}`, value, unit: object.distance.unit,
-            title, ariaLabel: `${value} ${object.distance.unit}. ${title}` }),
-          source: Object.freeze({ subject: `object:${object.id}`, document: source.href, label: source.label }),
-          marker: Object.freeze({ kind: 'scene' as const, id: object.id, color: object.color }),
-        });
-      }
-      const source = FOCUS_SOURCE_DOCUMENTS.get(object.id);
-      if (!source) throw new Error(`Missing focus source document: ${object.id}`);
-      const value = new Intl.NumberFormat('en', { maximumSignificantDigits: 4 }).format(object.distance.value);
-      const detail = `${value} pc${object.distance.quantity === 'comoving' ? ' (comoving)' : ''}`;
+      const source = sourceDocumentation(object.id, object.name);
+      const value = String(Number(object.distance.value.toFixed(3)));
       return Object.freeze({
-        kind: object.kind,
-        id: object.focusId,
+        kind: 'scene' as const,
+        id: object.id,
         name: object.name,
-        searchNames: Object.freeze(object.searchNames.map(name => name.toLocaleLowerCase('en'))),
+        searchNames: Object.freeze([...new Set([...designationNames(object.id, object.name), ...(object.searchNames ?? []).map(name => name.toLocaleLowerCase('en'))])]),
         classification: object.classification,
-        classificationName: objectClassificationLabel(object.classification).toLocaleLowerCase('en'),
+        classificationName: objectTypeLabel(object).toLocaleLowerCase('en'),
         systemName: object.systemName.toLocaleLowerCase('en'),
         route: object.route,
-        illustration: false,
+        illustration: object.discovery.illustration,
         distanceMeters: object.distance.meters,
-        detail: Object.freeze({ text: detail, title, ariaLabel: `${object.distance.value} pc. ${title}` }),
-        source: Object.freeze({ subject: `focus:${object.focusId}`, document: source.href, label: source.label }),
-        marker: Object.freeze({ kind: 'focus' as const, thumbnail: sidebarThumbnail(object.id)?.url2x ?? null }),
+        // A search row always states the distance; what kind of model draws it is the object page's business.
+        detail: Object.freeze({ text: `${value} ${object.distance.unit}`, value, unit: object.distance.unit,
+          title, ariaLabel: `${value} ${object.distance.unit}. ${title}` }),
+        source: Object.freeze({ subject: `object:${object.id}`, document: source.href, label: source.label }),
+        marker: objectResultMarker(object),
       });
     }), ...systemEntries()]),
   });
diff --git a/site/search/search-objects.mts b/site/search/search-objects.mts
index 4211af48034..f21dd98c7d4 100644
--- a/site/search/search-objects.mts
+++ b/site/search/search-objects.mts
@@ -14,7 +14,7 @@ export function objectNavigation<T extends { distance: { meters: number }; class
   });
 }
 
-// Overviews have no distance of their own; search lists them in their own rows (CatalogueOverviewRows.astro).
-const navigation = objectNavigation(OBJECTS.filter(object => object.kind !== 'overview'));
+// A level of the zoom ladder is listed in its own rows (CatalogueOverviewRows.astro), placed or not.
+const navigation = objectNavigation(OBJECTS);
 export const SEARCH_OBJECTS = navigation.search;
 export const PLANET_NAVIGATION_OBJECTS = navigation.planets;
diff --git a/site/selection-presentation.mts b/site/selection-presentation.mts
index 27ff3bf2754..b0d5df7369d 100644
--- a/site/selection-presentation.mts
+++ b/site/selection-presentation.mts
@@ -9,7 +9,7 @@ import { renderSourceLink, type SourceDocumentReference } from './source-link.mt
 import { selectGalaxyNeighbor } from './galaxy-neighbor-selection.mts';
 import { WORLD_OBJECTS } from './world-objects.mts';
 import { SOLAR_SYSTEM_ID, systemById } from './object-systems.mts';
-import { knownObject } from './object-directory.mts';
+import { knownLevel } from './object-directory.mts';
 import { fetchSystemHeaders, spliceSystemHeaders } from './system-headers-fragment.mts';
 
 /** Present the selected subject in the retained cards and result rows. */
@@ -25,7 +25,6 @@ export function createSelectionPresentation(documentTarget: Document, {
   if (!context) throw new Error('Object shell context is missing.');
   // One card per overview (OverviewCard.astro).
   const overviewCards = sectionElements(context, '[data-large-scale-overview]');
-  const focusCard = sectionElements(context, '[data-prepared-focus-card]')[0] ?? null;
   const system = sectionElements(context, '[data-system-results]')[0] ?? null;
   let systemHeaders = [...(system?.querySelectorAll<HTMLElement>('[data-system-header]') ?? [])];
   // Other systems' headers load with the first overview that needs one (`system-headers-fragment.mts`).
@@ -49,28 +48,23 @@ export function createSelectionPresentation(documentTarget: Document, {
   const objectName = (id: string) => WORLD_OBJECTS.find(object => object.id === id)?.name ?? '';
   const overviewName = ({ scope, systemId }: SceneOverview) => scope === 'system'
     ? systemById(WORLD_OBJECTS, systemId)?.name ?? 'Solar System'
-    : knownObject(scope)?.name ?? '';
+    : knownLevel(scope)?.name ?? '';
   const present = (subject: SelectionTarget, sourceLinks?: ReadonlyMap<string, SourceDocumentReference>): CatalogueSelection => {
-    const focus = subject.kind === 'focus' ? subject : null;
     const overview = subject.kind === 'overview' ? subject.overview : null;
-    // The subject a card may list: a catalogue focus, or an overview that is a member of a larger level (the Milky Way in
-    // the Local Group).
-    const subjectId = focus ? focus.id : overview && overview.scope !== 'system' ? overview.scope : null;
+    // A level that is a member of a larger one (the Milky Way in the Local Group) is the subject its card measures from.
+    const subjectId = overview && overview.scope !== 'system' ? overview.scope : null;
     const lists = (card: HTMLElement) => subjectId !== null
       && sectionElements(card, '[data-neighbor-id]').some(row => row.dataset.neighborId === subjectId);
-    // An overview shows its own card; a catalogue focus shows the card of the level that lists it.
-    const shown = overview && overview.scope !== 'system' ? overviewCards.find(card => card.dataset.largeScaleOverview === overview.scope)
-      : focus ? overviewCards.find(lists) : undefined;
+    const shown = overview && overview.scope !== 'system' ? overviewCards.find(card => card.dataset.largeScaleOverview === overview.scope) : undefined;
     // Each card measures its distances from the subject it lists, or else from its home (the member holding the stars, or
     // the observer).
     for (const card of overviewCards) selectGalaxyNeighbor(card, lists(card) ? subjectId! : card.dataset.neighborHome ?? 'observer');
     const systemSelected = overview?.scope === 'system';
-    const showContext = subject.kind === 'overview' || subject.kind === 'focus';
+    const showContext = subject.kind === 'overview';
     for (const card of overviewCards) setSectionShown(card, card === shown);
-    if (focusCard) setSectionShown(focusCard, !!focus);
     if (system) setSectionShown(system, systemSelected);
     systemContent.show(systemSelected);
-    // An overview or a catalogue focus shows its own card; the body's card waits off the page.
+    // An overview shows its own card; the body's card waits off the page.
     setSectionShown(information, !showContext);
     setSectionShown(context, showContext);
     renderSourceLink(documentTarget, selectionKey(subject), sourceLinks);
@@ -78,21 +72,16 @@ export function createSelectionPresentation(documentTarget: Document, {
     showSystemHeader(headerSystemId);
     systemBodies.show(systemSelected ? headerSystemId : null);
     if (solarSystemFacts && solarSystemFacts.hidden !== (headerSystemId !== SOLAR_SYSTEM_ID)) solarSystemFacts.hidden = headerSystemId !== SOLAR_SYSTEM_ID;
-    const label = subject.kind === 'focus'
-      ? (focusCard?.dataset.preparedFocusId === subject.id ? focusCard.querySelector('[data-focus-name]')?.textContent : null) || 'Selected object'
-      : subject.kind === 'overview' ? overviewName(subject.overview)
+    const label = subject.kind === 'overview' ? overviewName(subject.overview)
       : subject.kind === 'satellite-system' ? objectName(subject.hostId) || 'Selected system'
       : objectName(subject.objectId) || 'Selected object';
     if (context.getAttribute('aria-label') !== label) context.setAttribute('aria-label', label);
-    const kind = subject.kind === 'focus' ? 'prepared-focus'
-      : subject.kind === 'overview' ? subject.overview.scope : subject.kind === 'satellite-system' ? 'satellite-system' : 'object';
+    const kind = subject.kind === 'overview' ? subject.overview.scope : subject.kind === 'satellite-system' ? 'satellite-system' : 'object';
     if (documentTarget.documentElement.dataset.selection !== kind) documentTarget.documentElement.dataset.selection = kind;
-    const selection = subject.kind === 'focus' ? { kind: 'prepared-focus', id: subject.id } as const
-      : subject.kind === 'object' ? { kind: 'scene', id: subject.objectId } as const
+    const selection = subject.kind === 'object' ? { kind: 'scene', id: subject.objectId } as const
       : subject.kind === 'satellite-system' ? { kind: 'scene', id: subject.hostId } as const : null;
     for (const anchor of browser.querySelectorAll<HTMLElement>('.object-link')) {
-      const selected = selection?.kind === 'prepared-focus' ? anchor.dataset.preparedFocusId === selection.id
-        : selection?.kind === 'scene' && anchor.dataset.objectId === selection.id;
+      const selected = selection?.kind === 'scene' && anchor.dataset.objectId === selection.id;
       setLinkSelected(anchor, selected);
     }
     return selection;
diff --git a/site/seo-trail.mts b/site/seo-trail.mts
index 4deb02dd8db..f304bfb67bc 100644
--- a/site/seo-trail.mts
+++ b/site/seo-trail.mts
@@ -7,7 +7,7 @@ const parents = new Map<string, string>([
   ...context.bodies.flatMap(body => body.orbit ? [[body.id, body.orbit.centerBodyId] as const]
     : body.boundTo ? [[body.id, body.boundTo.hostId] as const] : []),
 ]);
-const pages = new Map(OBJECTS.filter(object => object.kind === 'scene').map(object => [object.id, object]));
+const pages = new Map(OBJECTS.map(object => [object.id, object]));
 
 /** The pages from the root of a body's orbit chain down to the page itself: Sun, Mars, Phobos. Centres without a page
  * (a barycentre) are passed through; a page outside every chain is its own one-step trail. */
diff --git a/site/seo.mts b/site/seo.mts
index cc6ef594e97..a37f1fb5350 100644
--- a/site/seo.mts
+++ b/site/seo.mts
@@ -16,11 +16,6 @@ export function objectSeo(object: Pick<import("./objects.mts").ObjectEntry, "id"
   };
 }
 
-/** The page of a catalogue subject the world draws: titled and addressed as itself. */
-export function focusSeo(focus: { id: string; name: string }, options?: Parameters<typeof objectSeo>[1]) {
-  return objectSeo({ id: focus.id, name: focus.name, route: `/${focus.id}/`, description: `${focus.name} in the cssEarth 3D explorer` }, options);
-}
-
 /** The site's own page, `/`: it opens on Earth but is named and addressed as the site. */
 export function homeSeo(earth: ReturnType<typeof objectSeo>) {
   return { ...earth, title: "cssEarth: the universe in HTML and CSS",
diff --git a/site/server/overview-result.mts b/site/server/overview-result.mts
index 05e343a61e4..1f2a9dabdff 100644
--- a/site/server/overview-result.mts
+++ b/site/server/overview-result.mts
@@ -10,5 +10,5 @@ export function overviewResult(overview: OverviewObject): ObjectResultEntry {
   return { kind: 'overview', id: overview.id, name: overview.name, route: overview.route,
     classificationName: objectClassificationLabel(overview.classification ?? 'overview'),
     source: { subject: `overview:${overview.id}`, document: source.href, label: source.label },
-    marker: { kind: 'focus', thumbnail: sidebarThumbnail(overview.id)?.url2x ?? null } };
+    marker: { kind: 'thumbnail', thumbnail: sidebarThumbnail(overview.id)?.url2x ?? null } };
 }
diff --git a/site/server/search-response.mts b/site/server/search-response.mts
index e9fd6cf1409..93feb729079 100644
--- a/site/server/search-response.mts
+++ b/site/server/search-response.mts
@@ -25,8 +25,7 @@ export async function renderSearchResponse(html: string, url: URL, data: SearchD
   const objectId = form.dataset.searchObject;
   if (!objectId || !/^[a-z][a-z0-9-]*$/u.test(objectId)) throw new Error('Prepared search object is invalid.');
   const search = requiredElement<HTMLInputElement>(form, '.object-sidebar-search');
-  const focusCard = sectionElements(document, '[data-prepared-focus-card][data-prepared-focus-id]')[0] ?? null;
-  const value = (url.searchParams.get('browse') ?? url.searchParams.get('q') ?? (focusCard ? search.getAttribute('value') : '') ?? '').slice(0, SEARCH_QUERY_LIMIT).trim();
+  const value = (url.searchParams.get('browse') ?? url.searchParams.get('q') ?? '').slice(0, SEARCH_QUERY_LIMIT).trim();
   const searching = url.searchParams.has('q');
   search.setAttribute('value', value);
   for (const input of document.querySelectorAll<HTMLInputElement>('input[data-search-context], input[data-view-context]')) {
@@ -96,10 +95,10 @@ export async function handleSearchRequest(request: Request, data: SearchData, fe
   const response = await fetcher(new URL(`/${objectId}/`, url.origin), { redirect: 'error', signal: AbortSignal.timeout(15_000) });
   if (!response.ok || !response.headers.get('content-type')?.includes('text/html')) return response;
   const page = await response.text();
-  // The page's own address: a catalogue focus's page is named by its path, which the rewrite to the function drops.
+  // The page's own address: a level's page is named by its path, which the rewrite to the function drops.
   const address = new URL(url);
   if (address.pathname === '/.netlify/functions/search') { address.pathname = `/${objectId}/`; address.searchParams.delete('object'); }
-  const drawnPage = isOverviewPage(objectId) || (await data.catalogue()).some(entry => entry.kind === 'prepared-focus' && entry.id === objectId);
+  const drawnPage = isOverviewPage(objectId);
   const render = async (target: URL) => renderSearchResponse(await renderDatasetResponse(page, target, objectId, fetcher, { drawnPage }), target, data);
   let html: string;
   try {
diff --git a/site/shell/maps-shell.css b/site/shell/maps-shell.css
index a6019a9fc7b..eeabd8db08c 100644
--- a/site/shell/maps-shell.css
+++ b/site/shell/maps-shell.css
@@ -631,6 +631,8 @@
 .object-chart-figure > .object-chart { margin: 0; }
 .object-mobile-information-heading { display: none; }
 @media (min-width: 821px) and (orientation: landscape) {
+  /* The tabs' own padding is the gap under the header's divider (--explorer-divider-gap); the header adds none. */
+  .object-card > .object-selected-panel:has(+ :is(.object-card-tabs, .object-tabs)) { padding-bottom: 0; }
   .object-information-panel > .object-factsheet-content { padding-top: 8px; }
   .object-information-panel:has(> .object-card-tabs) > .object-dataset-content.atlas-tree-disclosure { padding-top: 8px; border-top: 0; }
   .object-information-panel:has(> .object-card-tabs) > .object-dataset-content > summary { display: none; }
@@ -732,9 +734,10 @@
 .object-dataset-content > .object-dataset-details {
   position: relative;
   width: auto;
-  margin-top: 8px;
+  /* The dataset rows end 4px above this box and its title's line starts 1px inside its padding. */
+  margin-top: calc(var(--explorer-divider-gap) - 2px);
   margin-inline: 0;
-  padding: 13px 0 0;
+  padding: calc(var(--explorer-divider-gap) + var(--explorer-divider-width) + 1px) 0 0;
   border: 0;
 }
 .object-dataset-content > .object-dataset-details::before {
diff --git a/site/shell/object-shell-client.mts b/site/shell/object-shell-client.mts
index dcae2ca0a02..27da22737f7 100644
--- a/site/shell/object-shell-client.mts
+++ b/site/shell/object-shell-client.mts
@@ -1,14 +1,13 @@
+import { isExtendedClassification } from '@cssearth/objects';
 import { bindTabPanels } from '../tab-panels.mts';
 import { sectionElements, sectionPlaceholder, showSection } from '@cssearth/renderer';
 import { createObjectBrowserController } from '../object-browser.mts';
-import { applySeoHead, focusSeo, objectSeo } from '../seo.mts';
-import { knownObject } from '../object-directory.mts';
+import { applySeoHead, objectSeo } from '../seo.mts';
+import { knownLevel, knownObject } from '../object-directory.mts';
 import { overviewPage } from '../navigation/navigation-scope.mts';
 import { presentPageDatasets } from '../page-datasets.mts';
 import { navigationHref } from '../navigation/navigation-history.mts';
 import type { SceneLifetime } from '@cssearth/engine';
-import { createPreparedFocusCard } from '../prepared-focus-card.mts';
-import { fetchFocusFragment, focusBanksPending, spliceFocusBanks } from '../focus-fragment.mts';
 import { selectionKey } from '../scene/scene-selection.mts';
 import type { DestinationPresentation } from '../destination-browser.mts';
 import type { ShellCamera, PlaybackState } from '../browser/browser-types.mts';
@@ -61,23 +60,6 @@ export function mountObjectShell({
   let releaseArrivalControls = () => {};
   let navigationTransition: (ShellNavigationTransition & { cardSubject: 'body' | 'satellite-system' | null; retainsSourceCard: boolean }) | null = null;
   let camera: ShellCamera | null = null;
-  const focusRoot = sectionElements(drawer, '[data-prepared-focus-card]')[0] ?? null;
-  const focusTabs = createTabsController(focusRoot, lifetime, 'prepared-focus');
-  const focusCard = createPreparedFocusCard(focusRoot, id => focusTabs.show(id));
-  lifetime.onDispose(() => focusCard.destroy());
-  // The page ships the focus banks as a shared fragment; the first focus selection fetches it.
-  let focusBanks: Promise<void> | null = null;
-  function loadFocusBanks() {
-    if (!focusRoot || focusBanks || !focusBanksPending(focusRoot)) return;
-    focusBanks = fetchFocusFragment(url => windowTarget.fetch(url)).then(html => {
-      if (lifetime.disposed) return;
-      spliceFocusBanks(focusRoot, new windowTarget.DOMParser().parseFromString(html, 'text/html'));
-      focusCard.adoptBanks();
-    }).catch(error => {
-      focusBanks = null; // The next focus selection retries.
-      windowTarget.reportError(error);
-    });
-  }
   // The selected card panel stays retained across subject changes.
   let information: HTMLElement | null = null;
   // Switching between a body and its system changes layout, so it waits while the camera coasts and
@@ -123,36 +105,34 @@ export function mountObjectShell({
     // A page's datasets follow its address on every publication, a dataset-only change included (page-datasets.mts).
     presentPageDatasets(documentTarget, navigationHref(windowTarget), objectId);
     if (presentedSubject === subject) { updateBodyCard(); return; }
-    // What the world draws around the scene (a catalogue focus, an overview) is its own page, `/<id>/`.
+    // A level the world draws around the scene is its own page, `/<id>/`.
     const drawnPage = (selected: typeof subject | null) => {
-      if (selected?.kind === 'focus') return selected.record ? { id: selected.record.id, seo: focusSeo(selected.record) } : null;
-      const overview = selected?.kind === 'overview' ? knownObject(overviewPage(objectId, selected.overview.scope) ?? '') : undefined;
-      return overview?.kind === 'overview' ? { id: overview.id, seo: objectSeo(overview) } : null;
+      const overview = selected?.kind === 'overview' ? knownLevel(overviewPage(objectId, selected.overview.scope)) : undefined;
+      return overview ? { id: overview.id, seo: objectSeo(overview) } : null;
     };
     // Another star's scene zoomed out to an overview keeps its own address (a reload reopens that scene), but the tab
     // names what the card shows: the Milky Way from the ε Eridani system was still titled "ε Eridani" (2026-10-01).
     const titledOverview = (selected: typeof subject | null) => {
       if (selected?.kind !== 'overview' || selected.overview.scope === 'system' || drawnPage(selected)) return null;
-      const overview = knownObject(selected.overview.scope), scene = knownObject(objectId);
-      return overview?.kind === 'overview' && scene?.kind === 'scene' ? { route: scene.route, seo: { ...objectSeo(scene), title: objectSeo(overview).title } } : null;
+      const overview = knownLevel(selected.overview.scope), scene = knownObject(objectId);
+      return overview && scene ? { route: scene.route, seo: { ...objectSeo(scene), title: objectSeo(overview).title } } : null;
     };
-    const leftPage = presentedSubject?.kind === 'focus' || drawnPage(presentedSubject) !== null || titledOverview(presentedSubject) !== null;
+    const leftPage = drawnPage(presentedSubject) !== null || titledOverview(presentedSubject) !== null;
     presentedSubject = subject;
-    const focus = subject.kind === 'focus' ? subject : null, page = drawnPage(subject);
+    const page = drawnPage(subject);
     // Leaving one returns to the scene's page, whose head and forms a scene change would otherwise write
     // (object-browser.mts bindObject).
     const titled = titledOverview(subject);
     if (page) presentPage(`/${page.id}/`, page.seo);
     else if (titled) presentPage(titled.route, titled.seo);
-    // A focus whose record is still loading is already this page's subject: its head waits for the record.
-    else if (leftPage && !focus) {
+    else if (leftPage) {
       const scene = knownObject(subject.kind === 'object' ? subject.objectId : subject.kind === 'satellite-system' ? subject.hostId : objectId);
-      if (scene?.kind === 'scene') presentPage(scene.route, objectSeo(scene));
+      if (scene) presentPage(scene.route, objectSeo(scene));
     } else pendingPage = null;
-    focusCard.set(focus?.record ?? null, focus?.sources ?? [], focus?.presentation ?? null);
-    if (focus) loadFocusBanks();
     objectBrowser.refreshSelection();
-    viewReadout.setPreparedFocus(focus?.record ?? null);
+    // A galaxy, a cluster or a nebula has no surface to stand above: the readout measures to its centre.
+    const shown = knownObject(objectId);
+    viewReadout.setExtendedSubject(shown?.worldFrame && isExtendedClassification(shown.classification) ? { name: shown.name, positionM: shown.worldFrame.originM } : null);
     viewReadout.setOverviewScope(subject.kind === 'overview' ? subject.overview.scope : 'system');
     updateBodyCard();
   }
@@ -311,7 +291,6 @@ export function mountObjectShell({
     settingsController.bindObject();
     bindCardMaps();
     const subject = readSelection();
-    viewReadout.setPreparedFocus(subject.kind === 'focus' ? subject.record : null);
     informationCard.activatePanels();
   }
 }
diff --git a/site/shell/settings-panel.css b/site/shell/settings-panel.css
index dd866296e48..3f0f7b12ee5 100644
--- a/site/shell/settings-panel.css
+++ b/site/shell/settings-panel.css
@@ -55,7 +55,7 @@
   font: 400 14px/1.3 var(--shell-ui-font);
 }
 
-:is(.explorer-settings-panel, [data-focus-dataset-bank]) .object-setting-switch {
+.explorer-settings-panel .object-setting-switch {
   display: block;
   position: relative;
   grid-column: 3;
@@ -68,7 +68,7 @@
   background: var(--explorer-header-control-selected);
 }
 
-:is(.explorer-settings-panel, [data-focus-dataset-bank]) .object-setting-switch::before {
+.explorer-settings-panel .object-setting-switch::before {
   position: absolute;
   top: 3px;
   left: 3px;
@@ -79,20 +79,20 @@
   content: "";
 }
 
-:is(.explorer-settings-panel, [data-focus-dataset-bank]) input[type="checkbox"]:checked ~ .object-setting-switch {
+.explorer-settings-panel input[type="checkbox"]:checked ~ .object-setting-switch {
   background: var(--shell-text);
 }
 
-:is(.explorer-settings-panel, [data-focus-dataset-bank]) input[type="checkbox"]:checked ~ .object-setting-switch::before {
+.explorer-settings-panel input[type="checkbox"]:checked ~ .object-setting-switch::before {
   background: var(--explorer-panel-background);
   transform: translateX(16px);
 }
 
-:is(.explorer-settings-panel, [data-focus-dataset-bank]) input[type="checkbox"]:indeterminate ~ .object-setting-switch::before {
+.explorer-settings-panel input[type="checkbox"]:indeterminate ~ .object-setting-switch::before {
   transform: translateX(8px);
 }
 
-:is(.explorer-settings-panel, [data-focus-dataset-bank]) input[type="checkbox"]:focus-visible ~ .object-setting-switch {
+.explorer-settings-panel input[type="checkbox"]:focus-visible ~ .object-setting-switch {
   outline: 2px solid var(--shell-focus);
   outline-offset: 2px;
 }
diff --git a/site/shell/shell-layout.css b/site/shell/shell-layout.css
index a17410320aa..f9c49e0ea36 100644
--- a/site/shell/shell-layout.css
+++ b/site/shell/shell-layout.css
@@ -39,6 +39,9 @@ body[data-object-shell] {
   --explorer-panel-background: var(--explorer-surface-background);
   --explorer-divider: #000;
   --explorer-divider-width: 2px;
+  /* The space a card leaves above and below each of its dividers, to the nearest line of text or image: 14px measured on
+     both sides of every divider (2026-10-01), where the header's had 14 above and 22 or 30 below and a dataset's 12 and 12. */
+  --explorer-divider-gap: 12px;
   --explorer-control-border: var(--shell-border);
   --explorer-control-text: var(--shell-text-secondary);
 }
@@ -68,15 +71,10 @@ body[data-object-shell] {
   padding-block-start: 16px;
 }
 
-/* A focused object's hierarchy belongs above its title, not below its datasets. */
-.object-browser:has(> [data-prepared-focus-card]:not([hidden])) > [data-large-scale-overview] .object-breadcrumbs {
-  display: none;
-}
-
 .object-card > .object-selected-panel:has(+ :is(.object-card-tabs, .object-tabs))::after {
   content: "";
   display: block;
-  margin-top: 12px;
+  margin-top: var(--explorer-divider-gap);
   margin-inline: calc(-1 * var(--explorer-card-padding-inline-start)) calc(-1 * var(--explorer-card-padding-inline-end));
   border-top: var(--explorer-divider-width) solid var(--explorer-divider);
 }
diff --git a/site/source-documentation.mts b/site/source-documentation.mts
index c4731a85b71..e5ddd97357e 100644
--- a/site/source-documentation.mts
+++ b/site/source-documentation.mts
@@ -1,7 +1,6 @@
 import { execFileSync } from 'node:child_process';
 import { existsSync } from 'node:fs';
 import { resolve } from 'node:path';
-import { isPreparedCluster, type PreparedCatalogObject } from '@cssearth/catalog';
 import credits from './prepared-source-credits.json' with { type: 'json' };
 import { parseSourceCredits } from '@cssearth/objects/provenance';
 import { projectRoot } from '@cssearth/core/node';
@@ -47,11 +46,6 @@ export function sourceDocumentation(objectId: string, name: string) {
     label: creditLabel(sourceProviders(objectId)) };
 }
 
-export function focusSourceDocumentation(object: PreparedCatalogObject, catalogId: string) {
-  const owner = object.detailedObjectId ?? (isPreparedCluster(object) ? 'galaxy-clusters' : catalogId === 'galaxies' ? 'local-group' : object.id);
-  return sourceDocumentation(owner, object.name);
-}
-
 // A star hosts its system overview, but its own maps do not own the other bodies'
 // credits. Prepare the overview's union from the system's prepared members.
 export function systemSourceDocumentation(system: { readonly id: string; readonly name: string; readonly memberIds: readonly string[] }) {
diff --git a/site/startup-requests.mts b/site/startup-requests.mts
index 325c134c672..2dba7ac8e82 100644
--- a/site/startup-requests.mts
+++ b/site/startup-requests.mts
@@ -7,7 +7,7 @@ declare global { interface Window { __cssEarthStartupRequests?: StartupRequests
 
 /** Runs in the static document's head: one request per URL, kept for its reader by absolute URL. The object transport is
  * requested only at the default view of the page's own scene (`sceneRoute`, or the site root): a custom view (a query, a
- * catalogue focus's path) may be served other markup (`dataset-response.mts`), so its reader picks the transport itself. */
+ * level's path) may be served other markup (`dataset-response.mts`), so its reader picks the transport itself. */
 export function startStartupRequests(window: Window, urls: readonly string[], transportUrl: string, sceneRoute: string) {
   const location = window.location, query = new URLSearchParams(location.search);
   const defaultView = (location.pathname === '/' || location.pathname === sceneRoute) &&
diff --git a/site/system-card-content.mts b/site/system-card-content.mts
index de74f5b642c..307929af826 100644
--- a/site/system-card-content.mts
+++ b/site/system-card-content.mts
@@ -3,11 +3,13 @@ import { sectionElements, sectionPlaceholder } from '@cssearth/renderer';
 export function createSystemCardContent(documentTarget: Document) {
   const groups = [
     { source: '[data-system-dataset]', target: '[data-system-dataset-options]' },
-    { source: '[data-system-dataset-details]', target: '[data-system-dataset-details]' },
+    // The card's container carries the bare attribute; a dataset's details carry its id.
+    { source: '[data-system-dataset-details]:not([data-system-dataset-details=""])', target: '[data-system-dataset-details=""]' },
     { source: 'details.object-gallery-panel', target: '[data-system-galleries]' },
   ];
   const entries = groups.flatMap(({ source, target }) => {
-    const destination = documentTarget.querySelector<HTMLElement>(target);
+    // The system card is mounted only while a system is the subject: its containers are found in or out of the page.
+    const destination = sectionElements(documentTarget, target)[0];
     if (!destination) return [];
     // A detached dataset's details (detached-sections.ts) travel as their template placeholder.
     const nodes = new Set([...sectionElements(documentTarget, '.object-information-panel'), ...documentTarget.querySelectorAll<HTMLElement>(target)].flatMap(root => sectionElements(root, source)));
diff --git a/site/test/application-world-visibility.test.mts b/site/test/application-world-visibility.test.mts
index 09449c97302..b6e1201aa8b 100644
--- a/site/test/application-world-visibility.test.mts
+++ b/site/test/application-world-visibility.test.mts
@@ -7,10 +7,9 @@ import { allSatelliteSystems } from '../satellite-systems.mts';
 function fixture() {
   const lifetime = createSceneLifetime();
   type Layer = Parameters<typeof createApplicationWorldVisibility>[0];
-  const publications: Parameters<Layer['setBodyVisibility']>[0][] = [], categories: (string | null)[] = [];
-  const visibility = createApplicationWorldVisibility({ setBodyVisibility(value) { publications.push(value); },
-    setHighlightedClassification(value) { categories.push(value); } }, lifetime);
-  return { visibility, publications, categories, latest: () => publications.at(-1)! };
+  const publications: Parameters<Layer['setBodyVisibility']>[0][] = [];
+  const visibility = createApplicationWorldVisibility({ setBodyVisibility(value) { publications.push(value); } }, lifetime);
+  return { visibility, publications, latest: () => publications.at(-1)! };
 }
 
 test('every satellite family is visible when its host or any member is selected', () => {
@@ -61,8 +60,8 @@ test('only an explicitly selected non-featured comet gains its default-hidden or
   assert.ok(latest().orbitHidden?.includes('comet-2p'));
 });
 
-test('a pill category highlights its bodies and reaches the galaxy, cluster and nebula catalogue too', () => {
-  const { visibility, categories, latest } = fixture();
+test('a pill category highlights its bodies, the galaxies among them', () => {
+  const { visibility, latest } = fixture();
   visibility.setHighlightedClassification('planet');
   assert.ok(latest().highlighted?.includes('jupiter'));
   assert.ok(latest().highlighted?.includes('pluto'), 'the Planets pill marks the dwarf planets too');
@@ -73,7 +72,9 @@ test('a pill category highlights its bodies and reaches the galaxy, cluster and
   assert.ok(latest().highlighted?.includes('hr-8799'), 'from afar a planet is its star\'s dot, so the star carries the mark');
   assert.ok(!latest().highlighted?.includes('sun'));
   visibility.setHighlightedClassification('galaxy');
-  assert.deepEqual(latest().highlighted, []);
+  // A galaxy with a package is a body of the world: the pill marks it as it marks a planet.
+  for (const id of ['m31', 'lmc', 'm87']) assert.ok(latest().highlighted?.includes(id), id);
+  assert.ok(!latest().highlighted?.includes('jupiter'));
   visibility.setHighlightedClassification(null);
-  assert.deepEqual(categories, ['planet', 'exoplanet', 'galaxy', null]);
+  assert.deepEqual(latest().highlighted, []);
 });
diff --git a/site/test/built-pages.test.mts b/site/test/built-pages.test.mts
index 5ce4787ba8f..8c18d7562be 100644
--- a/site/test/built-pages.test.mts
+++ b/site/test/built-pages.test.mts
@@ -3,11 +3,12 @@ import test from 'node:test';
 import { builtObjectPages, builtScenePaths, namedPages } from '../built-pages.mts';
 
 const objects = [
-  { id: 'earth', kind: 'scene' }, { id: 'moon', kind: 'scene' }, { id: 'mars', kind: 'scene' },
-  { id: 'sun', kind: 'scene' }, { id: 'm31', kind: 'focus', sceneHostId: 'sun' },
+  { id: 'earth' }, { id: 'moon' }, { id: 'mars' }, { id: 'sun' },
+  // A level's page mounts the world host's scene.
+  { id: 'milky-way', sceneHostId: 'sun' },
 ];
 const pages = objects.map(({ id }) => ({ params: { id } }));
-const scenes = pages.filter(({ params }) => params.id !== 'm31');
+const scenes = pages.filter(({ params }) => params.id !== 'milky-way');
 const env = (list?: string) => (list === undefined ? {} : { CSSEARTH_BUILD_PAGES: list });
 const ids = (paths: readonly { params: { id: string } }[]) => paths.map(path => path.params.id);
 
@@ -27,7 +28,7 @@ test('a list builds the object pages it names; "/" is the home page, not an obje
 test('scene routes build for the scenes the named pages mount: "/" mounts the root, a focus its host', () => {
   assert.deepEqual(ids(builtScenePaths(scenes, objects, 'earth', env('/'))), ['earth']);
   assert.deepEqual(ids(builtScenePaths(scenes, objects, 'earth', env('/,/earth/'))), ['earth']);
-  assert.deepEqual(ids(builtScenePaths(scenes, objects, 'earth', env('/m31/,/moon/'))), ['moon', 'sun']);
+  assert.deepEqual(ids(builtScenePaths(scenes, objects, 'earth', env('/milky-way/,/moon/'))), ['moon', 'sun']);
 });
 
 test('a page no object has stops the build and names it', () => {
diff --git a/site/test/catalogue-window.test.mts b/site/test/catalogue-window.test.mts
index 5461518f328..4317573a37d 100644
--- a/site/test/catalogue-window.test.mts
+++ b/site/test/catalogue-window.test.mts
@@ -58,13 +58,14 @@ test('catalogue window bounds connected rows, reuses them while scrolling, and c
   assert.equal(list.querySelector('[data-catalogue-index="1"]')?.getAttribute('aria-setsize'), '2', 'marking the selection keeps the list size');
   assert.equal(list.querySelector('[data-catalogue-index="0"] a')?.getAttribute('aria-current'), null,
     'objects with the same display name must not share selection');
-  const focus: CatalogueRow = { ...entry(91), kind: 'prepared-focus', id: 'm42', route: '/m42/',
-    source: { subject: 'focus:m42', document: '/sources/m42/', label: 'Sources M42' },
-    marker: { kind: 'focus', thumbnail: null } };
-  catalogue.setRows(2, 0, [entry(91), focus]);
-  catalogue.setSelection({ kind: 'prepared-focus', id: 'm42' });
+  // A galaxy or a nebula is a scene row like any other, shown by its bank's thumbnail.
+  const nebula: CatalogueRow = { ...entry(91), id: 'm42', route: '/m42/',
+    source: { subject: 'object:m42', document: '/sources/m42/', label: 'Sources M42' },
+    marker: { kind: 'thumbnail', thumbnail: null } };
+  catalogue.setRows(2, 0, [entry(91), nebula]);
+  catalogue.setSelection({ kind: 'scene', id: 'm42' });
   assert.equal(list.querySelector('[data-catalogue-index="0"] a')?.getAttribute('aria-current'), null,
-    'a prepared focus cannot also select the current scene');
+    'selecting the nebula does not also select the other scene');
   assert.equal(list.querySelector('[data-catalogue-index="1"] a')?.getAttribute('aria-current'), 'page');
   catalogue.setSelection(null);
   assert.equal(list.querySelectorAll('[aria-current="page"]').length, 0, 'an overview selects no catalogue row');
diff --git a/site/test/context-lineage.test.mts b/site/test/context-lineage.test.mts
index 97293ad3810..838e26cb07a 100644
--- a/site/test/context-lineage.test.mts
+++ b/site/test/context-lineage.test.mts
@@ -8,10 +8,10 @@ import { CONTEXT_ROUTE } from '@cssearth/objects/provenance';
 test('each catalogue context reads its products and sources from its source records alone', async () => {
   const read: string[] = [];
   const contexts = await contextLineages({ route: CONTEXT_ROUTE, input: path => { read.push(path); return readFile(path); } });
-  assert.deepEqual(contexts.map(context => context.id), ['fornax-cluster', 'galaxy-clusters', 'local-group', 'nearby-universe', 'observable-universe', 'saturn-minor-moons', 'virgo-cluster']);
-  // The application route passed in is what the catalogue links each context to: the Sun's scene.
-  assert.ok(contexts.every(context => context.route === '/sun/'));
-  assert.ok(read.every(path => /\/source\/(presentation|manifest)\.json$/u.test(path)), 'nothing prepared is read');
+  assert.deepEqual(contexts.map(context => context.id), ['fornax-cluster-members', 'galaxy-clusters', 'local-group', 'nearby-universe', 'observable-universe', 'saturn-minor-moons', 'virgo-cluster-members']);
+  // A bank that names its host object is linked to that object's page; the rest to the route passed in, the Sun's scene.
+  assert.deepEqual(contexts.map(context => context.route), ['/fornax-cluster/', '/sun/', '/sun/', '/sun/', '/sun/', '/saturn/', '/virgo-cluster/']);
+  assert.ok(read.every(path => /\/(object|source\/(presentation|manifest))\.json$/u.test(path)), 'nothing prepared is read');
   for (const context of contexts) {
     assert.ok(context.lineage.products.length, context.id);
     for (const product of context.lineage.products) assert.ok(productSourceIds(context.lineage, product.id).length, `${context.id}/${product.id}`);
diff --git a/site/test/focus-catalog.test.mts b/site/test/focus-catalog.test.mts
deleted file mode 100644
index bf76ddbc401..00000000000
--- a/site/test/focus-catalog.test.mts
+++ /dev/null
@@ -1,35 +0,0 @@
-import assert from 'node:assert/strict';
-import { sourceTest } from '@cssearth/objects/node/source-test';
-const test = sourceTest();
-import { readFile } from 'node:fs/promises';
-import { parseHTML } from 'linkedom';
-import { parsePreparedGalaxyCatalog } from '@cssearth/catalog';
-import { initialFocusCatalog, readInitialFocus } from '../focus-catalog.mts';
-
-const catalogue = parsePreparedGalaxyCatalog(JSON.parse(await readFile(
-  new URL('../../src/objects/local-group/prepared/catalogue.json', import.meta.url), 'utf8')));
-const smc = catalogue.objects.find(object => object.id === 'smc')!;
-
-test('an initial galaxy focus retains its transitive positioned and unpositioned physical hosts', () => {
-  const fragment = initialFocusCatalog(catalogue, smc);
-  assert.equal(fragment.schema, 'cssearth-galaxy-catalog@1');
-  assert.deepEqual(fragment.objects.map(object => object.id), ['lmc', 'smc']);
-  assert.deepEqual(fragment.unpositionedHosts?.map(object => object.id), ['milky-way']);
-  const document = parseHTML(`<script type="application/json" data-initial-focus="smc">${JSON.stringify(fragment)}</script>`).document;
-  assert.equal(readInitialFocus(document)?.id, 'smc', 'the explicit identity selects SMC rather than its first positioned host');
-});
-
-test('initial focus host closure fails on a missing host and a cycle', () => {
-  const missing = { ...catalogue, objects: catalogue.objects.map(object => object.id === 'smc' ? { ...object, hostId: 'missing-host' } : object) };
-  assert.throws(() => initialFocusCatalog(missing, missing.objects.find(object => object.id === 'smc')!), /Unknown physical host: missing-host/);
-  const cyclic = { ...catalogue, objects: catalogue.objects.map(object => object.id === 'lmc' ? { ...object, hostId: 'smc' } : object) };
-  assert.throws(() => initialFocusCatalog(cyclic, cyclic.objects.find(object => object.id === 'smc')!), /Cyclic physical host: smc/);
-});
-
-test('initial focus requires an explicit selected identity present in the parsed fragment', () => {
-  const fragment = initialFocusCatalog(catalogue, smc);
-  for (const id of ['', 'not-present']) {
-    const document = parseHTML(`<script type="application/json" data-initial-focus="${id}">${JSON.stringify(fragment)}</script>`).document;
-    assert.throws(() => readInitialFocus(document), /Initial focus identity/);
-  }
-});
diff --git a/site/test/focus-fragment.test.mts b/site/test/focus-fragment.test.mts
deleted file mode 100644
index 7a265577370..00000000000
--- a/site/test/focus-fragment.test.mts
+++ /dev/null
@@ -1,33 +0,0 @@
-import assert from 'node:assert/strict';
-import { parseHTML } from 'linkedom';
-import { sourceTest } from '@cssearth/objects/node/source-test';
-const test = sourceTest();
-import { FOCUS_FRAGMENT_URL, fetchFocusFragment, focusBanksPending, spliceFocusBanks } from '../focus-fragment.mts';
-
-const FRAGMENT = '<!DOCTYPE html><style>.x{}</style><div data-focus-banks="datasets"><div data-focus-dataset-bank="m42" hidden>'
-  + '<button data-focus-dataset value="optical"></button></div><div data-focus-dataset-bank="m1" hidden></div></div>'
-  + '<div data-focus-banks="facts"><div data-focus-facts-bank="m42" hidden></div></div>';
-const card = () => parseHTML('<html><body><div data-prepared-focus-card><p data-focus-name></p>'
-  + '<div data-focus-banks-slot="datasets" hidden></div><div><div data-focus-banks-slot="facts" hidden></div></div></div></body></html>')
-  .document.querySelector<HTMLElement>('[data-prepared-focus-card]')!;
-
-test('the fragment is fetched from its one path, and a failed response names it', async () => {
-  const requested: string[] = [];
-  assert.equal(await fetchFocusFragment(async url => { requested.push(url); return new Response(FRAGMENT); }), FRAGMENT);
-  assert.deepEqual(requested, [FOCUS_FRAGMENT_URL]);
-  await assert.rejects(fetchFocusFragment(async () => new Response('', { status: 404 })), /Focus fragment \/focus-fragment\/ failed: HTTP 404/u);
-});
-
-test('splicing replaces each placeholder with its bank group and keeps the retained card', () => {
-  const root = card();
-  const name = root.querySelector('[data-focus-name]');
-  assert.equal(focusBanksPending(root), true);
-  spliceFocusBanks(root, parseHTML(FRAGMENT).document);
-  assert.equal(focusBanksPending(root), false);
-  assert.equal(root.querySelector('[data-focus-name]'), name);
-  assert.deepEqual([...root.querySelectorAll<HTMLElement>('[data-focus-dataset-bank]')].map(bank => bank.dataset.focusDatasetBank), ['m42', 'm1']);
-  // The facts group lands where its placeholder was, inside the factsheet wrapper.
-  assert.equal(root.querySelector('[data-focus-facts-bank="m42"]')?.parentElement?.parentElement, root);
-  assert.equal(root.querySelector('style'), null);
-  assert.throws(() => spliceFocusBanks(card(), parseHTML('<div data-focus-banks="datasets"></div>').document), /no "facts" bank group/u);
-});
diff --git a/site/test/galactic-focus.test.mts b/site/test/galactic-focus.test.mts
index ce5b08ccfa6..5901f9b2fd7 100644
--- a/site/test/galactic-focus.test.mts
+++ b/site/test/galactic-focus.test.mts
@@ -1,40 +1,31 @@
 import assert from 'node:assert/strict';
-import { sourceTest } from '@cssearth/objects/node/source-test';
-const test = sourceTest();
-import { mkdtemp, mkdir, rm, writeFile } from 'node:fs/promises';
-import { tmpdir } from 'node:os';
-import { join } from 'node:path';
-import { readPreparedFocusObjects } from '@cssearth/bake/navigation';
+import { test } from 'node:test';
+import { catalogueObject } from '@cssearth/objects';
+import { prepareSceneDistance } from '@cssearth/bake/navigation';
 import { searchObjects } from '../search/object-search.mts';
 
-test('a source-owned globular cluster is discovered, classified and searched through the shared focus route', async () => {
-  const root = await mkdtemp(join(tmpdir(), 'galactic-focus-'));
-  try {
-    const source = join(root, 'test-cluster/source');
-    await mkdir(source, { recursive: true });
-    await writeFile(join(source, 'nebula.json'), JSON.stringify({
-      schema: 'cssearth-nebula-catalog@1', frame: { referenceFrame: 'sun-icrf', epochJdTt: 2461286.5 },
-      sources: [{ id: 'paper', url: 'https://example.org/paper', bytes: 10, citation: 'Test measurement' }],
-      objects: [{ id: 'test-cluster', kind: 'globular-cluster', name: 'Test cluster', aliases: ['Cluster alias'],
-        introduction: { text: 'A source-backed test globular cluster.', sourceRefs: ['paper'] },
-        positionM: [3.085677581491367e18, 0, 0], skyPosition: { raDeg: 0, decDeg: 0, sourceRef: 'paper' },
-        distance: { valuePc: 100, sourceRef: 'paper', method: 'Test distance' },
-        classification: { name: 'Globular cluster', basis: 'Integrated stellar light.', sourceRef: 'paper' },
-        status: 'confirmed', detailedObjectId: 'test-cluster' }],
-    }));
-    const [focus, ...others] = await readPreparedFocusObjects(root, 'sun');
-    assert.equal(others.length, 0);
-    assert.ok(focus);
-    assert.equal(focus.classification, 'globular-cluster');
-    assert.equal(focus.systemName, 'Milky Way');
-    assert.equal(focus.route, '/test-cluster/');
-    assert.equal(focus.distance.quantity, 'catalogue');
-    const labels = [{ name: focus.name.toLowerCase(), names: focus.searchNames, classification: focus.classification,
-      classificationName: 'globular cluster', systemName: focus.systemName.toLowerCase() }];
-    assert.equal(searchObjects(labels, 'globular clusters').matches.length, 1);
-    assert.equal(searchObjects(labels, 'Cluster alias').matches.length, 1);
-    assert.equal(searchObjects(labels, 'nebula').matches.length, 0);
-  } finally {
-    await rm(root, { recursive: true, force: true });
-  }
+test('a globular cluster package is an entry of the registry from its own descriptor, classified and searched like any other', () => {
+  const PC_M = 3.085677581491367e16;
+  const descriptor = { schema: 'cssearth-object@2', id: 'test-cluster', type: 'layered-body', properties: {
+    catalog: { name: 'Test cluster', systemName: 'Milky Way', classification: 'globular-cluster', color: '#9a9a9a', distanceAu: 20626480.6,
+      description: 'A source-backed test globular cluster.', aliases: ['Cluster alias'], order: 9, context: {} },
+    worldFrame: { referenceFrame: 'sun-icrf', epochJdTt: 2461286.5, originM: [100 * PC_M, 0, 0], presentationToReference: [0, 1, 0, 1, 0, 0, 0, 0, 1],
+      metersPerUnit: PC_M, bodyRadiusM: 10 * PC_M } } };
+  const distance = prepareSceneDistance(descriptor);
+  // A globular cluster's distance is its catalogued one: no epoch, read from the observer.
+  assert.partialDeepStrictEqual(distance, { meters: 100 * PC_M, unit: 'pc', quantity: 'catalogue', referencePoint: 'observer', epochJdTt: null });
+  assert.ok(Math.abs(distance.value - 100) < 1e-9);
+  const focus = catalogueObject({ descriptor, distance, discovery: { featured: false, imagery: true, illustration: false } },
+    () => async () => { throw new Error('unused'); });
+  assert.equal(typeof focus.loadScene, 'function', 'a globular cluster is an object with a scene of its own, like any body');
+  const names = (focus as { searchNames?: readonly string[] }).searchNames;
+  assert.ok(names);
+  assert.equal(focus.classification, 'globular-cluster');
+  assert.equal(focus.systemName, 'Milky Way');
+  assert.equal(focus.route, '/test-cluster/');
+  const labels = [{ name: focus.name.toLowerCase(), names: names!, classification: focus.classification,
+    classificationName: 'globular cluster', systemName: focus.systemName.toLowerCase() }];
+  assert.equal(searchObjects(labels, 'globular clusters').matches.length, 1);
+  assert.equal(searchObjects(labels, 'Cluster alias').matches.length, 1);
+  assert.equal(searchObjects(labels, 'nebula').matches.length, 0);
 });
diff --git a/site/test/navigation-content.test.mts b/site/test/navigation-content.test.mts
index 0057061fe9b..c56889a6b36 100644
--- a/site/test/navigation-content.test.mts
+++ b/site/test/navigation-content.test.mts
@@ -3,17 +3,15 @@ import test from 'node:test';
 import { objectLinkIsCurrent } from '../navigation/navigation-content.mts';
 
 const origin = 'https://site.test';
-function link(href: string, preparedFocus = false) {
+function link(href: string) {
   const url = new URL(href, origin);
-  return { origin: url.origin, pathname: url.pathname, search: url.search,
-    hasAttribute(name: string) { return preparedFocus && name === 'data-prepared-focus-id'; } };
+  return { origin: url.origin, pathname: url.pathname, search: url.search };
 }
 
-test('object navigation leaves focus and overview links to the same scene unselected', () => {
+test('object navigation leaves overview links to the same scene unselected', () => {
   assert.equal(objectLinkIsCurrent(link('/sun/'), origin, '/sun/'), true);
   assert.equal(objectLinkIsCurrent(link('/sun/?dataset=corona'), origin, '/sun/'), true);
   assert.equal(objectLinkIsCurrent(link('/sun/?overview=system'), origin, '/sun/'), false);
   assert.equal(objectLinkIsCurrent(link('/m42/'), origin, '/sun/'), false);
-  assert.equal(objectLinkIsCurrent(link('/sun/', true), origin, '/sun/'), false);
   assert.equal(objectLinkIsCurrent(link('https://elsewhere.test/sun/'), origin, '/sun/'), false);
 });
diff --git a/site/test/navigation-fragments.test.mts b/site/test/navigation-fragments.test.mts
index 9ff891c8e8c..feb5ef1ef04 100644
--- a/site/test/navigation-fragments.test.mts
+++ b/site/test/navigation-fragments.test.mts
@@ -21,8 +21,6 @@ class IntentElement extends EventTarget {
 }
 class IntentAnchor extends IntentElement {
   origin: string; pathname: string;
-  preparedFocus = false;
-  hasAttribute(name: string) { return name === 'data-prepared-focus-id' && this.preparedFocus; }
   constructor(pathname: string, origin: string) { super(); this.anchor = this; this.pathname = pathname; this.origin = origin; }
 }
 function fixtureWindow() {
@@ -141,9 +139,6 @@ test('hover, focus and world hover prefetch registry routes after a dwell; a pre
     fire('pointerover', target); flush();
   }
   assert.deepEqual(requested, ['venus', 'ceres', 'venus'], 'The current body, foreign and unregistered routes are ignored');
-  const nebula = new IntentAnchor('/ceres/', 'https://example.test'); nebula.preparedFocus = true;
-  fire('pointerdown', nebula);
-  assert.deepEqual(requested, ['venus', 'ceres', 'venus'], 'A prepared focus never fetches its fallback body card.');
   const host = new IntentElement();
   host.hovered = { dataset: { objectNavigate: 'ceres' } };
   fire('objecthoverchange', host); flush();
diff --git a/site/test/navigation-ontology.test.mts b/site/test/navigation-ontology.test.mts
index 626997472db..fad01c14d97 100644
--- a/site/test/navigation-ontology.test.mts
+++ b/site/test/navigation-ontology.test.mts
@@ -2,30 +2,50 @@ import assert from 'node:assert/strict';
 import { sourceTest } from '@cssearth/objects/node/source-test';
 const test = sourceTest();
 import { readFile } from 'node:fs/promises';
-import { OBJECTS, SCENE_OBJECTS, requireObject, requireSceneObject } from '../objects.mts';
+import { OBJECTS, OVERVIEWS, SCENE_OBJECTS, requireObject, requirePage, requireSceneObject } from '../objects.mts';
 import { objectAdapter } from '../object-adapter.mts';
 import { SEARCH_OBJECTS } from '../search/search-objects.mts';
-import { readPreparedFocusObjects, prepareSceneDistance, prepareFocusObject } from '@cssearth/bake/navigation';
-import { readOverviews } from '@cssearth/objects/node';
-import { distanceDescription, normalizeDestinationQuery, parseNavigationDistance } from '@cssearth/objects';
+import { prepareSceneDistance } from '@cssearth/bake/navigation';
+import { readObjectDescriptors, readOverviews } from '@cssearth/objects/node';
+import { distanceDescription, isExtendedClassification, normalizeDestinationQuery, parseNavigationDistance } from '@cssearth/objects';
+import { isRecord } from '@cssearth/core';
 import { parsePreparedGalaxyCatalog, resolveSpatialCitation } from '@cssearth/catalog';
 import { resolve } from 'node:path';
 
-test('every prepared spatial subject and every scene has exactly one searchable destination', async () => {
-  const prepared = await readPreparedFocusObjects(resolve('src/objects'), 'sun');
-  const overviews = await readOverviews(resolve('src/objects'), 'sun');
-  assert.equal(OBJECTS.length, SCENE_OBJECTS.length + prepared.length + overviews.length);
-  assert.deepEqual(OBJECTS.filter(object => object.kind === 'prepared-focus'), prepared);
-  assert.deepEqual(OBJECTS.filter(object => object.kind === 'overview'), overviews);
-  // Overviews are searched through their own rows (CatalogueOverviewRows.astro); everything else through the catalogue.
-  assert.deepEqual(new Set(SEARCH_OBJECTS.map(object => object.id)), new Set(OBJECTS.filter(object => object.kind !== 'overview').map(object => object.id)));
+test('every scene and every package the host draws has exactly one searchable destination, built from its own descriptor', async () => {
+  const descriptors = await readObjectDescriptors(resolve('src/objects'));
+  // A galaxy, a nebula or a cluster is an authored object like any body: its recipe declares no surface.
+  const hosted = [...descriptors].filter(([, descriptor]) => isRecord(descriptor) && isRecord(descriptor.properties) && isRecord(descriptor.properties.recipe)
+    && Array.isArray(descriptor.properties.recipe.surfaces) && !descriptor.properties.recipe.surfaces.length).map(([id]) => id);
+  assert.equal(hosted.length, 18);
+  // A bank is context the world draws, never an object: none carries a catalogue entry.
+  for (const [id, descriptor] of descriptors) if (isRecord(descriptor) && typeof descriptor.type === 'string' && /-bank$/u.test(descriptor.type)) assert.ok(isRecord(descriptor.properties) && descriptor.properties.catalog === undefined, id);
+  const overviews = await readOverviews(resolve('src/objects'));
+  // The registry holds objects only, each with its own scene. A level of the zoom ladder is a view, not an object.
+  assert.equal(OBJECTS, SCENE_OBJECTS);
+  for (const id of hosted) assert.equal(requireSceneObject(id).id, id);
+  assert.deepEqual(OVERVIEWS.map(level => level.id), overviews.map(overview => overview.id));
+  for (const level of OVERVIEWS) assert.equal(OBJECTS.some(object => object.id === level.id), false, level.id);
+  // Every level still has its page: the layout and the sitemap find it, though the object registry does not hold it.
+  for (const level of OVERVIEWS) assert.equal(requirePage(level.id).route, `/${level.id}/`);
+  assert.equal(requirePage('mars').name, 'Mars');
+  const sitemap = await (await import('../pages/sitemap.xml.ts')).GET().text();
+  for (const level of OVERVIEWS) assert.ok(sitemap.includes(`/${level.id}/</loc>`), level.id);
+  // The Local Group is a level with a place of its own: the world draws and names it.
+  assert.ok(OVERVIEWS.find(level => level.id === 'local-group')?.worldFrame);
+  // Levels are searched through their own rows (CatalogueOverviewRows.astro); every object through the catalogue.
+  assert.deepEqual(new Set(SEARCH_OBJECTS.map(object => object.id)), new Set(OBJECTS.map(object => object.id)));
   assert.deepEqual(objectAdapter.routes(SCENE_OBJECTS), SCENE_OBJECTS.map(object => object.route));
-  assert.equal(requireObject('m31').kind, 'prepared-focus');
-  assert.throws(() => requireSceneObject('m31'), /not a scene owner/);
+  assert.equal(requireSceneObject('m31').id, 'm31');
+  assert.throws(() => requireSceneObject('milky-way'), /no scene of its own/);
   for (const [query, id] of [['Andromeda', 'm31'], ['M31', 'm31'], ['LMC', 'lmc'], ['SMC', 'smc'], ['NGC 1976', 'm42'], ['Virgo', 'virgo-cluster']]) {
     const object = requireObject(id!);
-    assert.equal(object.kind, 'prepared-focus');
-    assert.ok(object.kind === 'prepared-focus' && object.searchNames.some(name => name.includes(normalizeDestinationQuery(query!))), query);
+    assert.ok((object.searchNames ?? []).some(name => name.includes(normalizeDestinationQuery(query!))), query);
+  }
+  // Each is a body of the world, placed by its own world frame.
+  for (const id of hosted) {
+    const object = requireObject(id);
+    assert.ok(isExtendedClassification(object.classification) && Math.hypot(...object.worldFrame.originM) > 0, id);
   }
 });
 
@@ -34,8 +54,9 @@ test('distance display and order use the prepared position, never the legacy orb
     const descriptor = JSON.parse(await readFile(`src/objects/${object.id}/object.json`, 'utf8'));
     const distance = prepareSceneDistance(descriptor);
     assert.deepEqual(object.distance, distance, object.id);
-    assert.equal(distance.epochJdTt, object.worldFrame?.epochJdTt);
-    assert.equal(distance.referencePoint, 'heliocentre');
+    // A body on an orbit has a distance at the frame's epoch; one placed by a catalogue distance has no epoch.
+    assert.equal(distance.epochJdTt, distance.quantity === 'catalogue' ? null : object.worldFrame?.epochJdTt, object.id);
+    assert.equal(distance.referencePoint, distance.quantity === 'catalogue' ? 'observer' : 'heliocentre', object.id);
   }
   const halley = requireSceneObject('comet-1p');
   assert.ok(halley.distance.value > 30 && halley.distance.value < 40);
@@ -43,7 +64,6 @@ test('distance display and order use the prepared position, never the legacy orb
   assert.ok(!('distanceAu' in halley));
   assert.ok(SEARCH_OBJECTS.every((object, index) => index === 0 || object.distance.meters >= SEARCH_OBJECTS[index - 1]!.distance.meters));
   const cluster = requireObject('virgo-cluster');
-  assert.ok(cluster.kind !== 'overview');
   // A cluster sits at its Cosmicflows-4 group's measured distance, a catalogue distance, not its redshift's comoving one.
   assert.equal(cluster.distance.quantity, 'catalogue');
   assert.equal(cluster.distance.epochJdTt, null, 'navigation epoch must not become a measured distance epoch');
@@ -63,9 +83,6 @@ test('galaxy citations resolve across the full prepared catalogue, including the
   }
   assert.equal(resolveSpatialCitation('Graczyk2020ApJ...904...13G', catalogue.sources)?.url, 'https://arxiv.org/abs/2010.08754');
   const galaxy = catalogue.objects[0]!;
-  const future = prepareFocusObject({ ...galaxy, id: 'future_galaxy', name: 'Future galaxy', aliases: ['New alias'] }, 'sun');
-  assert.equal(future.route, '/future_galaxy/');
-  assert.ok(future.searchNames.includes('new alias'));
   const broken = { ...catalogue, objects: [{ ...galaxy, distance: { ...galaxy.distance, sourceRef: 'missing-paper' } }] };
   assert.throws(() => parsePreparedGalaxyCatalog(broken), /Unresolved distance reference/);
 });
@@ -75,12 +92,11 @@ test('physical hosts remain distinct from scene hosts and M45 retains its measur
   const raw: unknown = JSON.parse(await readFile('src/objects/local-group/prepared/catalogue.json', 'utf8'));
   const catalogue = parsePreparedGalaxyCatalog(raw), satellite = catalogue.objects.find(o => o.id === 'andromeda_01')!;
   assert.equal(satellite.hostId, 'm31', 'a host its object package details takes the package id');
-  assert.equal(prepareFocusObject(satellite, 'sun').sceneHostId, 'sun');
+  assert.equal(OBJECTS.some(o => o.id === satellite.id), false, 'a catalogue row without a package is data, never a destination');
   // The Milky Way row is detailed by the milky-way package, so it carries that id; its LVDB key stays in its source reference.
   assert.equal(catalogue.unpositionedHosts?.find(o => o.id === 'milky-way')?.sourceRef, 'lvdb-v1.1.1:mw:name_discovery');
-  assert.equal(OBJECTS.find(o => o.id === 'milky-way')?.kind, 'overview', 'a physical host does not fabricate a catalogue destination; its page is the overview');
+  assert.ok(OVERVIEWS.some(level => level.id === 'milky-way') && !OBJECTS.some(o => o.id === 'milky-way'), 'a physical host does not fabricate a catalogue destination; its page is the level');
   const m45 = OBJECTS.find(o => o.id === 'm45')!;
-  assert.ok(m45.kind !== 'overview');
   assert.equal(m45.distance.subject?.id, 'm45-stellar-cluster');
   assert.match(distanceDescription(m45.distance), /Pleiades stellar cluster/);
   assert.match(distanceDescription(m45.distance), /dust-filament distances are not measured/);
diff --git a/site/test/navigation-request.test.mts b/site/test/navigation-request.test.mts
index 275bee36354..9b148aa3343 100644
--- a/site/test/navigation-request.test.mts
+++ b/site/test/navigation-request.test.mts
@@ -43,3 +43,20 @@ test('a star hosting planets flies to frame its system on the first click and op
   const second = select('eps-eridani');
   assert.equal(second.destination.camera.kind === 'frame' && second.destination.camera.framing, 'detail');
 });
+
+test('a galaxy picked from another galaxy\'s page is a destination like any body: it adds a history entry', () => {
+  const navigation = {
+    centerTarget() { return null; },
+    systemTarget() { assert.fail('a galaxy hosts no system'); },
+    overviewTarget() { assert.fail('object selection does not open an overview'); },
+  } as unknown as Parameters<typeof resolveNavigation>[1]['navigation'];
+  // M 33, then LMC from search, then Back must return to M 33 (it left the site on 2026-10-01).
+  const { destination } = resolveNavigation({ kind: 'object' }, {
+    object: requireSceneObject('lmc'), objects: WORLD_OBJECTS, navigation,
+    current: { objectId: 'm33', href: 'https://css.earth/m33/', subject: { kind: 'object', objectId: 'm33' },
+      centeredObjectId: null, hasPresented: true, reuseScene: false, mount: null, pending: null },
+  });
+  assert.equal(new URL(destination.url).pathname, '/lmc/');
+  assert.deepEqual(destination.history, { history: 'push' });
+  assert.deepEqual(destination.subject, { kind: 'object', objectId: 'lmc' });
+});
diff --git a/site/test/navigation-scope.test.mts b/site/test/navigation-scope.test.mts
index 5a0918dd141..75f887d73f5 100644
--- a/site/test/navigation-scope.test.mts
+++ b/site/test/navigation-scope.test.mts
@@ -1,8 +1,8 @@
 import assert from 'node:assert/strict';
 import { sourceTest } from '@cssearth/objects/node/source-test';
 const test = sourceTest();
-import { drawnPageFromUrl, overviewPage, overviewScopeFromUrl, preparedFocusFromUrl, satelliteSystemFromUrl, withOverviewScope,
-  withPreparedFocus, WORLD_HOST_ID } from '../navigation/navigation-scope.mts';
+import { drawnPageFromUrl, overviewPage, overviewScopeFromUrl, satelliteSystemFromUrl, withOverviewScope,
+  WORLD_HOST_ID } from '../navigation/navigation-scope.mts';
 import { withSceneDataset, readSceneDatasetUrl } from '../dataset-url.mts';
 
 const at = (path: string) => new URL(path, 'https://css.earth');
@@ -11,13 +11,13 @@ const write = (path: string, scene: string, scope: Parameters<typeof withOvervie
   return url.pathname + url.search;
 };
 
-test('every page is /<id>/: an overview and a catalogue subject are both read from the path', () => {
+test('every page is /<id>/: a level is read from the path, and an object with a scene is its own page', () => {
   assert.equal(WORLD_HOST_ID, 'sun');
   assert.equal(overviewScopeFromUrl(at('/milky-way/'), 'sun'), 'milky-way');
   assert.equal(drawnPageFromUrl(at('/milky-way/'), 'sun'), 'milky-way');
-  assert.equal(preparedFocusFromUrl(at('/milky-way/'), 'sun'), null, 'an overview is not a catalogue focus');
-  assert.equal(preparedFocusFromUrl(at('/m31/'), 'sun'), 'm31');
-  assert.equal(overviewScopeFromUrl(at('/m31/'), 'sun'), null, 'a catalogue focus has no overview');
+  assert.equal(drawnPageFromUrl(at('/m31/'), 'm31'), null, 'a galaxy is the scene of its own page');
+  assert.equal(overviewScopeFromUrl(at('/m31/'), 'm31'), null);
+  assert.equal(overviewScopeFromUrl(at('/m31/?overview=system'), 'm31'), 'system');
   // The page wins over its query; only a star's system overview is a query.
   assert.equal(overviewScopeFromUrl(at('/milky-way/?overview=system'), 'sun'), 'milky-way');
   assert.equal(satelliteSystemFromUrl(at('/milky-way/?view=satellites')), false);
@@ -40,10 +40,6 @@ test("an overview's page is the world host's scene; another star's overview stay
 
 test("a drawn subject's page carries none of the scene's own selections, so a cold open reads none", () => {
   assert.equal(write('/sun/?dataset=spectral-slope&feature=12&v=saved', 'sun', 'milky-way'), '/milky-way/?v=saved');
-  const focus = withPreparedFocus(at('/sun/?dataset=spectral-slope&feature=12'), 'sun', 'm42', null);
-  assert.equal(focus.pathname + focus.search, '/m42/');
-  const dataset = withPreparedFocus(at('/sun/?dataset=spectral-slope'), 'sun', 'm42', 'optical');
-  assert.equal(dataset.pathname + dataset.search, '/m42/?dataset=optical', "a focus's dataset is its own dataset");
   assert.deepEqual(readSceneDatasetUrl(at('/milky-way/?dataset=spectral-slope'), 'sun'), { requested: false, id: null });
   assert.equal(withSceneDataset(at('/milky-way/'), 'sun', 'spectral-slope').search, '', 'the scene never writes its dataset there');
 });
diff --git a/site/test/navigation-test-values.mts b/site/test/navigation-test-values.mts
index 1df07f26344..ce4e26b7764 100644
--- a/site/test/navigation-test-values.mts
+++ b/site/test/navigation-test-values.mts
@@ -22,12 +22,10 @@ export function quaternion(values: readonly number[]): WorldCameraPose['pose']['
 export function navigationFixture(frame: PreparedWorldCameraFrame, capture: () => WorldCameraPose,
   optics: ObjectWorldNavigation['optics']): ObjectWorldNavigation {
   return { motion: createCameraMotion(), frame, capture, optics, apply() { throw new Error('This fixture only samples the camera.'); },
-    preparedFocus: () => null, setPreparedFocus() {},
-    async flyToPreparedFocus() { throw new Error('This fixture does not fly the camera.'); },
     subscribe() { throw new Error('This fixture does not subscribe to camera changes.'); } };
 }
 export function objectFixture(id: string, worldFrame: PreparedWorldCameraFrame, overrides: Partial<ObjectEntry> = {}): ObjectEntry {
-  return { kind: 'scene', id, name: id, systemName: id, classification: 'planet', color: '#000000', distance: testDistance(1),
+  return { id, name: id, systemName: id, classification: 'planet', color: '#000000', distance: testDistance(1),
     route: `/${id}/`, description: id, worldFrame, discovery: { featured: false, imagery: false, illustration: false },
     async loadScene() { throw new Error('This fixture does not mount a scene.'); }, ...overrides };
 }
diff --git a/site/test/nebula-search.test.mts b/site/test/nebula-search.test.mts
index df48bb779ab..1866c9cd318 100644
--- a/site/test/nebula-search.test.mts
+++ b/site/test/nebula-search.test.mts
@@ -2,16 +2,16 @@ import assert from 'node:assert/strict';
 import { sourceTest } from '@cssearth/objects/node/source-test';
 const test = sourceTest();
 import { OBJECTS } from '../objects.mts';
-import { defineObjects, definePreparedFocus, normalizeDestinationQuery, type PreparedFocusObject } from '@cssearth/objects';
+import { catalogueObject, defineObjects, normalizeDestinationQuery } from '@cssearth/objects';
 
 test('rendered nebulae contribute common names and catalogue aliases to search', async () => {
-  const rows = OBJECTS.filter((object): object is PreparedFocusObject => object.kind === 'prepared-focus' && object.classification === 'nebula');
+  const rows = OBJECTS.filter(object => object.classification === 'nebula');
   for (const [query,id] of [['orion','m42'],['M42','m42'],['NGC 1976','m42'],['helix','helix'],['NGC 7293','helix'],['m2-9','m2-9'],['M2–9','m2-9'],['Twin Jet','m2-9'],
     ['Pleiades','m45'],['M45','m45'],['Seven Sisters','m45'],['Crab','m1'],['M1','m1'],['NGC 1952','m1'],['Lagoon','m8'],['M8','m8'],['NGC 6523','m8']]) {
-    const match = rows.find(row => row.searchNames.some(name => name.includes(normalizeDestinationQuery(query!))));
-    assert.equal(match?.focusId,id);
+    const match = rows.find(row => ((row as { searchNames?: readonly string[] }).searchNames ?? []).some(name => name.includes(normalizeDestinationQuery(query!))));
+    assert.equal(match?.id,id);
     assert.equal(match?.route,`/${id}/`);
   }
   assert.throws(()=>defineObjects([rows[0]!,rows[0]!]),/Duplicate object/);
-  assert.throws(()=>definePreparedFocus({}));
+  assert.throws(()=>catalogueObject({}, () => async () => { throw new Error('unused'); }), /Invalid catalogue entry/);
 });
diff --git a/site/test/object-directory.test.mts b/site/test/object-directory.test.mts
index 39411f732b9..e7fda55fc4f 100644
--- a/site/test/object-directory.test.mts
+++ b/site/test/object-directory.test.mts
@@ -23,7 +23,10 @@ test('every prepared entry rebuilds the object the registry holds', () => {
 test('preparation reads the registry the application holds, without its scene loader', async () => {
   const prepared = readPreparedObjects(resolve(import.meta.dirname, '../..'));
   assert.deepEqual(facts(prepared.objects), facts(OBJECTS));
+  // Preparation reads the same scene objects, galaxies and nebulae among them; a level has no scene of its own.
   assert.deepEqual(prepared.sceneObjects.map(object => object.id), REGISTERED_SCENE_OBJECTS.map(object => object.id));
+  assert.equal(prepared.requireSceneObject('m31').id, 'm31');
+  assert.throws(() => prepared.requireSceneObject('milky-way'), /no scene of its own/);
   assert.equal(prepared.requireSceneObject('mars').name, REGISTERED_SCENE_OBJECTS.find(object => object.id === 'mars')?.name);
   await assert.rejects(prepared.requireSceneObject('mars').loadScene(), /cannot mount a scene/);
 });
diff --git a/site/test/object-navigation.test.mts b/site/test/object-navigation.test.mts
index 080dee823b4..3a1e47d621c 100644
--- a/site/test/object-navigation.test.mts
+++ b/site/test/object-navigation.test.mts
@@ -12,8 +12,8 @@ import { markerStyle, resolveMarkerStyle, validateMarkerPresentation } from "@cs
 import { PREPARED_NAVIGATION_MARKERS } from "../prepared-navigation-markers.mjs";
 
 test("search contains every object but the overviews, including the Sun; only planets enter the scale", () => {
-  // Overviews have no distance to order by; search lists them in their own rows (CatalogueOverviewRows.astro).
-  assert.deepEqual(new Set(SEARCH_OBJECTS), new Set(OBJECTS.filter(object => object.kind !== "overview")));
+  // The levels of the zoom ladder are not objects; search lists them in their own rows (CatalogueOverviewRows.astro).
+  assert.deepEqual(new Set(SEARCH_OBJECTS), new Set(OBJECTS));
   assert.ok(SEARCH_OBJECTS.some(({ id }) => id === "sun"));
   assert.ok(PLANET_NAVIGATION_OBJECTS.every(({ classification }) => classification === "planet"));
   const unknown = [
diff --git a/site/test/object-result.test.mts b/site/test/object-result.test.mts
index 1003b970c93..1c464533070 100644
--- a/site/test/object-result.test.mts
+++ b/site/test/object-result.test.mts
@@ -40,10 +40,9 @@ test('the shared server row escapes authored names and attributes', () => {
 test('overview navigation shares the row without a fabricated distance or focus target', () => {
   const { document } = parseHTML(objectResultMarkup({ kind: 'overview', id: 'milky-way', name: 'Milky Way',
     route: '/milky-way/', classificationName: 'galaxy', source: earth.source,
-    marker: { kind: 'focus', thumbnail: '/navigation/focus-milky-way@2x.webp' } }));
+    marker: { kind: 'thumbnail', thumbnail: '/navigation/focus-milky-way@2x.webp' } }));
   const link = document.querySelector('a')!;
   assert.equal(link.getAttribute('href'), '/milky-way/');
-  assert.equal(link.dataset.preparedFocusId, undefined);
   assert.equal(link.dataset.objectId, undefined);
   assert.equal(link.querySelector('img')?.getAttribute('width'), '40');
   assert.equal(link.querySelector('.object-distance')?.textContent, 'Galaxy');
diff --git a/site/test/overview-context.test.mts b/site/test/overview-context.test.mts
index bd5bf0446d9..2359347e552 100644
--- a/site/test/overview-context.test.mts
+++ b/site/test/overview-context.test.mts
@@ -88,10 +88,9 @@ test('zooming out from the Sun walks the registry overviews in their order, and
 });
 
 test('the ladder is the overview entries: an authored fifth level is reached past its own threshold', async () => {
-  const { defineOverview } = await import('@cssearth/objects');
-  const beyond = defineOverview({ kind: 'overview', id: 'beyond-the-horizon', name: 'Beyond', description: 'A test level.', order: 5,
-    zoom: { enter: { distancePc: 3e10 }, returnBelow: { distancePc: 2e10 }, frame: { distance: { distancePc: 5e10 } } },
-    holds: [], packages: [], route: '/beyond-the-horizon/', sceneHostId: 'sun' });
+  const { catalogueLevel } = await import('@cssearth/objects');
+  const beyond = catalogueLevel({ descriptor: { schema: 'cssearth-object@2', id: 'beyond-the-horizon', type: 'map-sphere', properties: { overview: { name: 'Beyond', description: 'A test level.', order: 5,
+    zoom: { enter: { distancePc: 3e10 }, returnBelow: { distancePc: 2e10 }, frame: { distance: { distancePc: 5e10 } } }, holds: [] } } } });
   const levels = [...OVERVIEWS, beyond], gpc = 1e9 * 3.085677581491367e16;
   assert.equal(overviewScopeAtCamera(camera(40 * gpc), 'observable-universe', context, undefined, levels), 'beyond-the-horizon');
   assert.equal(overviewScopeAtCamera(camera(25 * gpc), 'observable-universe', context, undefined, levels), 'observable-universe');
diff --git a/site/test/page-datasets.test.mts b/site/test/page-datasets.test.mts
index 1f7b8a55227..a39eabda931 100644
--- a/site/test/page-datasets.test.mts
+++ b/site/test/page-datasets.test.mts
@@ -11,7 +11,7 @@ const test = sourceTest();
 const card = () => parseHTML(`<html><body><div data-page-datasets="observable-universe" data-default-dataset="cutaway"
   data-dataset-views='{"cutaway":"cutaway","full":"full"}'>
   <button name="dataset" value="cutaway" aria-pressed="true"></button><button name="dataset" value="full" aria-pressed="false"></button>
-  <div data-focus-dataset-details="cutaway"></div><div data-focus-dataset-details="full" hidden></div></div></body></html>`).document;
+  <div data-page-dataset-details="cutaway"></div><div data-page-dataset-details="full" hidden></div></div></body></html>`).document;
 
 test("a page's dataset is its own dataset while the address is that page, and its default elsewhere", () => {
   const [datasets] = readPageDatasets(card());
@@ -27,7 +27,7 @@ test('the card marks the chosen dataset on its host scene and hides its datasets
   assert.equal(root.hidden, false);
   assert.deepEqual([...document.querySelectorAll('button')].map(button => button.getAttribute('aria-pressed')), ['false', 'true']);
   // Only the chosen dataset's details are mounted; the other waits in a template (detached-sections.ts).
-  assert.deepEqual([...document.querySelectorAll<HTMLElement>('[data-focus-dataset-details]')].map(detail => detail.dataset.focusDatasetDetails), ['full']);
+  assert.deepEqual([...document.querySelectorAll<HTMLElement>('[data-page-dataset-details]')].map(detail => detail.dataset.pageDatasetDetails), ['full']);
   // Another star zoomed out to the same level shows the level's card without them: choosing one would leave that star.
   presentPageDatasets(document, 'https://css.earth/trappist-1/?overview=system', 'trappist-1');
   assert.equal(root.hidden, true);
diff --git a/site/test/prepared-context-navigation.test.mts b/site/test/prepared-context-navigation.test.mts
deleted file mode 100644
index 1477d60400e..00000000000
--- a/site/test/prepared-context-navigation.test.mts
+++ /dev/null
@@ -1,504 +0,0 @@
-import assert from 'node:assert/strict';
-import { sourceTest } from '@cssearth/objects/node/source-test';
-const test = sourceTest();
-import { createPreparedContextNavigation } from '../prepared-context-navigation.mts';
-import { createSceneSelection } from '../scene/scene-selection.mts';
-import { createNavigationLifecycle } from '../navigation/navigation-lifecycle.mts';
-import { withPreparedFocus } from '../navigation/navigation-scope.mts';
-import { createImageFocusBank } from '@cssearth/renderer/universe/prepared-focus-bank.ts';
-import { overviewScopeFromUrl, preparedFocusFromUrl } from '../navigation/navigation-scope.mts';
-import { isPreparedCluster } from '@cssearth/catalog';
-import type { PreparedFocusPresentation } from '../prepared-focus.mts';
-import type { PreparedCatalogObject, PreparedGalaxyRecord, PreparedClusterRecord, SpatialCatalogSource, SpatialCitation } from '@cssearth/catalog';
-import type { ObjectWorldNavigation } from '@cssearth/renderer/runtime/world-navigation-types.ts';
-import type { PreparedNavigationFocus } from '@cssearth/renderer/navigation/prepared-focus.ts';
-import type { PreparedVolumeDatasetState } from '@cssearth/renderer/volume/prepared-volume-datasets.ts';
-import type { DensityVolumeFrame } from '@cssearth/objects';
-type ContextLayer = Parameters<typeof createPreparedContextNavigation>[0]['layer'];
-type Content = { record: PreparedCatalogObject | null; references: readonly SpatialCitation[]; presentation: PreparedFocusPresentation | null };
-type FixtureOptions = { object?: Partial<PreparedGalaxyRecord> & Partial<Pick<PreparedClusterRecord, 'kind' | 'classification'>>;
-  unavailableObjectIds?: readonly string[]; bankReady?: Promise<PreparedVolumeDatasetState>; loadedFramingRadiusUnits?: number;
-  imageLayerFrames?: Readonly<Record<string, DensityVolumeFrame>>; volumeDatasetFrames?: Readonly<Record<string, { frame: DensityVolumeFrame; framingRadiusUnits: number }>>; volumeBank?: PreparedVolumeDatasetState | null;
-  deferredVolumeBank?: PreparedVolumeDatasetState | null;
-  cameraPositionM?: readonly [number, number, number] };
-const baseFrame: DensityVolumeFrame = { referenceFrame: 'sun-icrf', epochJdTt: 1, originM: [0,0,0], localToReferenceXyzw: [0,0,0,1],
-  metersPerUnit: 1e18, boundsUnits: { min: [-500,-500,-500], max: [500,500,500] } };
-function required<T>(value: T | null | undefined): T { assert.ok(value !== null && value !== undefined); return value; }
-function last<T>(values: T[]): T { return required(values.at(-1)); }
-
-
-function fixture({ object = {}, imageLayerFrames = {}, volumeDatasetFrames = {}, volumeBank = null, deferredVolumeBank = null,
-  unavailableObjectIds = [], bankReady, loadedFramingRadiusUnits, cameraPositionM = [1e20, 0, 1e19] }: FixtureOptions = {}) {
-  let current: PreparedNavigationFocus | null = null, signal: AbortSignal | undefined;
-  const flights: {id:string; reducedMotion?:boolean}[] = [], flightFocuses: PreparedNavigationFocus[] = [];
-  const presentationFocuses: (PreparedNavigationFocus | null | undefined)[] = [];
-  const callbacks = new Set<() => void>(), errors: Error[] = [], selections: (string | null)[] = [], writes: (string | URL)[] = [], content: Content[] = [];
-  const windowTarget = { location: new URL('https://example.test/catalogue-a/?v=saved'),
-    history: { state: {}, replaceState(state: unknown, _: string, url?: string | URL | null) { assert.ok(url); windowTarget.location = new URL(url, windowTarget.location); writes.push(url); } } };
-  const owner = { frame: { referenceFrame: 'sun-icrf', epochJdTt: 1, originM: [0,0,0],
-      presentationToReference: [1,0,0,0,-1,0,0,0,1], metersPerUnit: 1e18, bodyRadiusM: 1e18 },
-    capture: () => ({ referenceFrame: 'sun-icrf', epochJdTt: 1,
-      pose: { positionM: cameraPositionM, orientationXyzw: [0,0,0,1] } }),
-    optics: () => ({ focalPixels: 1000, widthPixels: 1000, heightPixels: 1000, principalOffsetPixels: [0,0],
-      framingRadiusPixels: 400, visibleRect: {left:-500,right:500,top:-500,bottom:500}, detailHandoffDiameterPixels: 20 }),
-    preparedFocus: () => current,
-    setPreparedFocus(focus: PreparedNavigationFocus | null) { current = focus; for (const callback of callbacks) callback(); },
-    subscribe(callback: () => void) { callbacks.add(callback); callback(); return () => callbacks.delete(callback); },
-    flyToPreparedFocus(focus: PreparedNavigationFocus, options: { signal?: AbortSignal; reducedMotion?: boolean } = {}) { signal = required(options.signal); this.setPreparedFocus(focus);
-      flights.push({id:focus.id,reducedMotion:options.reducedMotion}); flightFocuses.push(focus);
-      if (options.reducedMotion) return Promise.resolve({completed:true});
-      return new Promise<{ completed: boolean }>(resolve => required(signal).addEventListener('abort', () => resolve({ completed: false }), { once: true })); } };
-  // The real `subscribeVolumeDataset` hands the listener the bank state, so a deferred bank can replay a
-  // notification once its payload arrives; a no-argument listener no longer satisfies that signature.
-  const datasetCallbacks = new Set<(state: PreparedVolumeDatasetState) => void>(), datasetWrites: string[] = [];
-  let bankState = volumeBank, currentVolumeDatasetFrames = volumeDatasetFrames;
-  // A deferred bank is released through the same load the runtime awaits, so a declared-but-absent
-  // bank stays a pending load rather than an unknown focus.
-  let releaseDeferredBank: (() => void) | null = null;
-  const readyBank = bankReady ?? (deferredVolumeBank
-    ? new Promise<PreparedVolumeDatasetState>(resolve => { releaseDeferredBank = () => resolve(deferredVolumeBank); })
-    : undefined);
-  const applyBank = (change: Partial<PreparedVolumeDatasetState>) => { bankState = { ...required(bankState), ...change }; for (const callback of datasetCallbacks) callback(required(bankState)); };
-  // Only the one declared bank may be addressed, whether its payload is resident, deferred, or still loading.
-  const declaredBankId = () => bankState?.objectId ?? deferredVolumeBank?.objectId ?? Object.keys(currentVolumeDatasetFrames)[0];
-  const layer = { imageLayerFrames, get volumeDatasetFrames() { return currentVolumeDatasetFrames; },
-    async ensureVolumeDataset(objectId: string) {
-      if (!readyBank) return;
-      bankState = await readyBank;
-      assert.equal(bankState.objectId, objectId);
-      if (loadedFramingRadiusUnits !== undefined) currentVolumeDatasetFrames = { ...currentVolumeDatasetFrames, [objectId]: { ...required(currentVolumeDatasetFrames[objectId]), framingRadiusUnits: loadedFramingRadiusUnits } };
-      for (const callback of datasetCallbacks) callback(bankState);
-    },
-    volumeDatasetState: (objectId: string) => objectId === bankState?.objectId ? bankState : null,
-    selectVolumeDataset(objectId: string, id: string) {
-      assert.equal(objectId, declaredBankId());
-      datasetWrites.push(id);
-      if (!bankState) return;
-      assert.ok(bankState.datasets.some(dataset => dataset.id === id)); applyBank({ id, selectedDataset: id });
-    },
-    subscribeVolumeDataset(objectId: string, listener: (state: PreparedVolumeDatasetState) => void) {
-      assert.equal(objectId, declaredBankId());
-      datasetCallbacks.add(listener); return () => { datasetCallbacks.delete(listener); };
-    },
-    selectGalaxy: (id: string | null, focus?: PreparedNavigationFocus | null) => { selections.push(id); presentationFocuses.push(focus); },
-    resolveGalaxy: (id: string): PreparedCatalogObject | null => {
-      if (!['catalogue-a','catalogue-b'].includes(id)) return null;
-      const galaxy: PreparedGalaxyRecord = { id, name: id, aliases: [], status: 'confirmed', positionM: [1e20,0,0],
-        skyPosition: { raDeg: 0, decDeg: 0, sourceRef: 'positions:row' },
-        distance: { valuePc: 1, method: 'Published distance', sourceRef: 'PublishedBibliographicKey' },
-        membership: { group: 'local-group', subgroup: 'field', basis: 'Published membership', sourceRef: 'membership:row' }, ...object };
-      if (object.kind !== 'galaxy-cluster') return galaxy;
-      return { ...galaxy, kind: 'galaxy-cluster', classification: required(object.classification),
-        redshift: { value: .01, type: 'spectroscopic', sourceRef: 'positions:row' },
-        aperture: { definition: 'R500', properRadiusM: 1e22, comovingRadiusM: 1e22, sourceRef: 'positions:row' } };
-    } };
-  const focusLayer: ContextLayer = { ensureGalaxyCatalog: async () => {}, selectGalaxy: layer.selectGalaxy, resolveGalaxy: layer.resolveGalaxy,
-    focusBank(id) {
-      if (imageLayerFrames[id]) return createImageFocusBank(id, imageLayerFrames[id], () => Promise.resolve());
-      if (!currentVolumeDatasetFrames[id]) return null;
-      return { objectId: id,
-        framingRadiusM: () => { const framing = required(currentVolumeDatasetFrames[id]); return framing.framingRadiusUnits * framing.frame.metersPerUnit; },
-        state: () => layer.volumeDatasetState(id), load: () => layer.ensureVolumeDataset(id),
-        selectDataset: dataset => layer.selectVolumeDataset(id, dataset), subscribe: listener => layer.subscribeVolumeDataset(id, listener) };
-    },
-  };
-  const sources: SpatialCatalogSource[] = [{ id: 'positions', url: 'https://example.test/positions', bytes: 1, citation: 'Published positions', references: [{ id: 'PublishedBibliographicKey', url: 'https://example.test/paper', citation: 'Distance paper' }] },
-    { id: 'membership', url: 'https://example.test/membership', bytes: 1, citation: 'Published membership' },
-    { id: 'unrelated', url: 'https://example.test/unrelated', bytes: 1, citation: 'Unused audit input' }];
-  // Narrow test doubles intentionally expose only this controller's browser/runtime surface.
-  const executor = createPreparedContextNavigation({ layer: focusLayer, windowTarget: windowTarget as unknown as Window, onError: error => { assert.ok(error instanceof Error); errors.push(error); },
-    sources, unavailableObjectIds, presentation: { metersPerParsec: 3e16, defaultFocusRadiusM: 1e18, minimumDistanceRadii: .01, maximumDistanceM: 1e23 } });
-  // The application request now owns supersession and abort; the focus executor receives that lifetime.
-  const requests = createNavigationLifecycle({ onCancel() {}, onError: error => { assert.ok(error instanceof Error); errors.push(error); } });
-  let available = false;
-  const selection = createSceneSelection({ objectId: 'mercury', initial: { kind: 'object', objectId: 'mercury' }, onChange() {} });
-  const disconnect = executor.connect(owner as unknown as ObjectWorldNavigation, { canPublish: () => available,
-    readFocus: () => selection.current.kind === 'focus' ? selection.current.id : null,
-    onFocusChange: ({ record, sources: references, presentation, url: policy }) => {
-      available = true; content.push({ record, references, presentation });
-      selection.focus(record, references, presentation);
-      if (policy === 'preserve') return;
-      const url = new URL(windowTarget.location.href);
-      if (policy === 'reframe') url.searchParams.delete('v');
-      const selected = selection.url(url);
-      if (selected !== windowTarget.location.href) windowTarget.history.replaceState(windowTarget.history.state, '', selected);
-    } });
-  function apply(url: string, frame: boolean) {
-    available = false;
-    const request = requests.begin({ id: 'mercury', url, subject: { kind: 'object', objectId: 'mercury' },
-      camera: frame ? { kind: 'focus' } : { kind: 'restore', animate: false }, history: { history: 'replace' },
-      scene: 'reuse', origin: 'link', feature: null, timing: { mark() {} } });
-    const finish = () => { if (requests.finish(request, 'finished')) available = true; };
-    const fail = (error: unknown) => { if (requests.owns(request)) { assert.ok(error instanceof Error); errors.push(error); } };
-    try {
-      const result = executor.apply(url, { sceneId: 'mercury', signal: request.signal, isCurrent: () => requests.owns(request), frame, reducedMotion: !frame });
-      if (result) return result.catch(fail).finally(finish);
-    } catch (error) { fail(error); }
-    finish();
-  }
-  const controller = {
-    restore: (url: string) => apply(url, false),
-    select: ({ id }: { id: string }) => apply(withPreparedFocus(new URL(windowTarget.location.href), 'mercury', id, null).href, true),
-    suspend() { available = false; requests.cancel(); },
-    destroy() { available = false; requests.cancel(); executor.destroy(); },
-  };
-  return { controller, disconnect, owner, layer, datasetCallbacks, datasetWrites, windowTarget, errors, selections, presentationFocuses, writes, callbacks, content, flights, flightFocuses, signal: () => signal,
-    resolveDeferredVolumeBank() { required(releaseDeferredBank)(); } };
-}
-
-test('a saved dataset link to an unavailable package still opens its actual catalogue record', () => {
-  const f = fixture({ object: { detailedObjectId: 'helix' }, unavailableObjectIds: ['helix'] });
-  f.windowTarget.location.searchParams.set('dataset', 'eso-vista');
-  f.controller.restore(f.windowTarget.location.href);
-  assert.deepEqual(f.errors, []);
-  assert.equal(last(f.content).record?.id, 'catalogue-a');
-  assert.equal(last(f.content).presentation, null);
-  assert.deepEqual(f.datasetWrites, []);
-  f.controller.destroy();
-});
-
-test('a disconnected or destroyed focus ignores its old camera owner', () => {
-  for (const release of ['disconnect', 'destroy'] as const) {
-    const f = fixture();
-    f.windowTarget.location.searchParams.delete('v');
-    if (release === 'disconnect') f.disconnect(); else f.controller.destroy();
-    assert.equal(f.callbacks.size, 0, `${release} releases the owner's subscription`);
-    f.controller.restore(f.windowTarget.location.href);
-    assert.deepEqual(f.flights, [], `${release}: a later restore does not fly the old owner`);
-    assert.deepEqual(f.content, [], `${release}: nothing is published`);
-    f.controller.destroy();
-  }
-});
-
-test('a direct focus link without a saved camera frames its target immediately', () => {
-  const f = fixture();
-  f.windowTarget.location.searchParams.delete('v');
-  f.controller.restore(f.windowTarget.location.href);
-  assert.deepEqual(f.flights,[{id:'catalogue-a',reducedMotion:true}]);
-  assert.deepEqual(f.errors,[]);
-  f.controller.destroy();
-});
-
-test('a focus link with a visible saved camera restores selection without reframing', () => {
-  const f = fixture();
-  f.controller.restore(f.windowTarget.location.href);
-  assert.deepEqual(f.flights,[]);
-  assert.equal(f.owner.preparedFocus()?.id,'catalogue-a');
-  f.controller.destroy();
-});
-
-test('a focus link whose saved camera looks away reframes the named target', () => {
-  const f = fixture({ cameraPositionM: [1e20, 0, -1e19] });
-  f.controller.restore(f.windowTarget.location.href);
-  assert.deepEqual(f.flights,[{id:'catalogue-a',reducedMotion:true}]);
-  assert.equal(f.owner.preparedFocus()?.id,'catalogue-a');
-  assert.equal(f.windowTarget.location.searchParams.has('v'), false);
-  assert.deepEqual(f.errors,[]);
-  f.controller.destroy();
-});
-
-test('a focus link whose saved camera puts the named target off-screen reframes it', () => {
-  const f = fixture({ cameraPositionM: [2e20, 0, 1e19] });
-  f.controller.restore(f.windowTarget.location.href);
-  assert.deepEqual(f.flights,[{id:'catalogue-a',reducedMotion:true}]);
-  assert.equal(f.windowTarget.location.searchParams.has('v'), false);
-  assert.deepEqual(f.errors,[]);
-  f.controller.destroy();
-});
-
-test('suspension isolates camera restore publications from incoming focus history and cancels an older selection flight', async () => {
-  const f = fixture();
-  f.controller.restore(f.windowTarget.location.href);
-  assert.equal(required(last(f.content).record).id, 'catalogue-a');
-  assert.deepEqual(last(f.content).references.map(source => source.id), ['positions', 'PublishedBibliographicKey', 'membership']);
-  assert.equal(required(last(f.content).record).distance.sourceRef, 'PublishedBibliographicKey');
-  const flight = f.controller.select({ id: 'catalogue-b' });
-  assert.equal(required(f.owner.preparedFocus()).id, 'catalogue-b');
-  assert.equal(required(last(f.content).record).id, 'catalogue-b');
-  const incoming = 'https://example.test/catalogue-a/?v=restored';
-  f.windowTarget.location = new URL(incoming);
-  f.controller.suspend();
-  f.owner.setPreparedFocus(null); // Shared v restoration clears the runtime pivot.
-  assert.equal(f.windowTarget.location.href, incoming);
-  assert.equal(required(f.signal()).aborted, true);
-  await flight;
-  assert.equal(f.windowTarget.location.href, incoming);
-  f.controller.restore(incoming);
-  assert.equal(required(f.owner.preparedFocus()).id, 'catalogue-a');
-  assert.equal(required(last(f.content).record).id, 'catalogue-a');
-  assert.equal(f.windowTarget.location.href, incoming);
-  assert.deepEqual(f.errors, []);
-  f.controller.destroy();
-  assert.equal(f.callbacks.size, 0);
-});
-
-test('an invalid incoming catalogue ID remains available for diagnosis after restoration publications', async () => {
-  const f = fixture();
-  f.controller.restore(f.windowTarget.location.href);
-  f.controller.suspend();
-  const incoming = 'https://example.test/unknown/?v=restored';
-  f.windowTarget.location = new URL(incoming);
-  f.owner.setPreparedFocus(null);
-  await f.controller.restore(incoming);
-  f.owner.setPreparedFocus(null);
-  assert.equal(f.errors.length, 1);
-  assert.match(f.errors[0].message, /Unknown prepared galaxy/);
-  assert.equal(f.windowTarget.location.href, incoming);
-  assert.equal(f.selections.at(-1), null);
-  assert.equal(last(f.content).record, null);
-  f.controller.destroy();
-});
-
-test('an authored framing radius takes precedence over an oversized transparent image frame', () => {
-  const imageLayerFrames = { detailed: baseFrame };
-  const f = fixture({ imageLayerFrames, object: { detailedObjectId: 'detailed', presentation: { focusRadiusM: 2e18 } } });
-  f.controller.restore(f.windowTarget.location.href);
-  assert.equal(required(f.owner.preparedFocus()).framingRadiusM, 2e18);
-  assert.equal(required(f.owner.preparedFocus()).limits.minimumDistanceM, 2e16);
-  assert.equal(required(f.owner.preparedFocus()).limits.maximumDistanceM, 1e23);
-  assert.deepEqual(f.errors, []);
-  f.controller.destroy();
-  const fallback = fixture({ imageLayerFrames, object: { detailedObjectId: 'detailed' } });
-  fallback.controller.restore(fallback.windowTarget.location.href);
-  assert.equal(required(fallback.owner.preparedFocus()).framingRadiusM, 5e20);
-  fallback.controller.destroy();
-});
-
-test('a cluster focus uses its prepared aperture framing and source without pretending it has galaxy membership', () => {
-  const f = fixture({ object: { kind: 'galaxy-cluster', membership: undefined,
-    classification: { name: 'Cluster', basis: 'Published aperture', sourceRef: 'membership:cluster-row' }, presentation: { focusRadiusM: 9e22 } } });
-  f.controller.restore(f.windowTarget.location.href);
-  assert.deepEqual(f.errors, []);
-  assert.equal(required(f.owner.preparedFocus()).framingRadiusM, 9e22);
-  assert.deepEqual(last(f.content).references.map(source => source.id), ['positions', 'PublishedBibliographicKey', 'membership']);
-  const cluster = required(last(f.content).record);
-  assert.ok(isPreparedCluster(cluster));
-  assert.equal(cluster.kind, 'galaxy-cluster');
-  f.controller.destroy();
-});
-
-const volumeBank = (): PreparedVolumeDatasetState => ({ objectId: 'detailed', id: 'first', defaultDataset: 'first', selectedDataset: 'first', starsVisible: true,
-  datasets: ['first', 'second', 'third'].map(id => ({ id, label: id, title: `${id} dataset`, description: 'Prepared observation', sourceUrl: 'https://example.test/source' })) });
-const volumeDatasetFrames = { detailed: { framingRadiusUnits: 2, frame: baseFrame } };
-
-test('volume focus uses its authored framing radius before transparent bounds and retains an explicit catalogue override', () => {
-  for (const focusRadiusM of [undefined, 3e18]) {
-    const f = fixture({ volumeDatasetFrames, volumeBank: volumeBank(), object: { detailedObjectId: 'detailed',
-      ...(focusRadiusM ? { presentation: { focusRadiusM } } : {}) } });
-    f.controller.restore(f.windowTarget.location.href);
-    assert.equal(required(f.owner.preparedFocus()).framingRadiusM, focusRadiusM ?? 2e18);
-    assert.deepEqual(f.errors, []);
-    f.controller.destroy();
-  }
-});
-
-test('focused dataset selection follows applied runtime state while URL restore keeps the same camera owner', () => {
-  const f = fixture({ volumeDatasetFrames, volumeBank: volumeBank(), object: { detailedObjectId: 'detailed' } });
-  f.windowTarget.location.searchParams.set('dataset', 'second');
-  const incoming = f.windowTarget.location.href;
-  f.controller.restore(incoming);
-  assert.equal(required(f.layer.volumeDatasetState('detailed')).selectedDataset, 'second');
-  assert.equal(required(last(f.content).presentation).selectedDataset, 'second');
-  assert.equal(f.windowTarget.location.href, incoming);
-  assert.equal(f.datasetCallbacks.size, 1);
-  const focus = f.owner.preparedFocus(), controls = required(last(f.content).presentation);
-  controls.selectDataset('third');
-  assert.equal(f.owner.preparedFocus(), focus, 'Changing dataset does not replace or move the camera focus');
-  assert.equal(required(f.layer.volumeDatasetState('detailed')).selectedDataset, 'third');
-  assert.equal(required(last(f.content).presentation).selectedDataset, 'third');
-  assert.equal(f.windowTarget.location.searchParams.get('dataset'), 'third');
-  assert.equal(f.windowTarget.location.searchParams.get('v'), 'saved');
-  f.controller.suspend();
-  controls.selectDataset('first');
-  assert.equal(required(f.layer.volumeDatasetState('detailed')).selectedDataset, 'third');
-  f.windowTarget.location = new URL(incoming);
-  f.controller.restore(incoming);
-  assert.equal(required(f.layer.volumeDatasetState('detailed')).selectedDataset, 'second');
-  f.windowTarget.location.searchParams.delete('dataset');
-  f.controller.restore(f.windowTarget.location.href);
-  assert.equal(required(f.layer.volumeDatasetState('detailed')).selectedDataset, 'first', 'A plain focus restores its authored default');
-  assert.equal(f.windowTarget.location.searchParams.get('dataset'), 'first');
-  f.owner.setPreparedFocus(null);
-  assert.equal(last(f.content).presentation, null);
-  assert.equal(f.windowTarget.location.pathname, '/mercury/', 'Clearing the focus returns to the scene page');
-  assert.equal(f.windowTarget.location.searchParams.has('dataset'), false);
-  assert.equal(f.datasetCallbacks.size, 0);
-  controls.selectDataset('third');
-  assert.equal(required(f.layer.volumeDatasetState('detailed')).selectedDataset, 'first', 'Stale controls cannot mutate a departed focus');
-  assert.deepEqual(f.errors, []);
-  f.controller.destroy();
-});
-
-test('a saved dataset waits for its lazy bank instead of rejecting the focus as unknown', async () => {
-  const bank = volumeBank();
-  const f = fixture({ volumeDatasetFrames, deferredVolumeBank: bank, object: { detailedObjectId: bank.objectId } });
-  f.windowTarget.location.searchParams.set('dataset', 'second');
-  const incoming = f.windowTarget.location.href;
-  const restoring = f.controller.restore(incoming);
-  assert.deepEqual(f.errors, [], 'A bank that is still loading is not an unknown focus dataset');
-  assert.equal(f.owner.preparedFocus(), null, 'The focus waits for its declared bank rather than being rejected');
-  assert.deepEqual(f.datasetWrites, []);
-  f.resolveDeferredVolumeBank(); await restoring;
-  assert.deepEqual(f.errors, []);
-  assert.equal(f.owner.preparedFocus()?.id, 'catalogue-a');
-  assert.deepEqual(f.datasetWrites, ['second']);
-  assert.equal(last(f.content).record?.id, 'catalogue-a');
-  assert.equal(required(last(f.content).presentation).selectedDataset, 'second');
-  assert.equal(f.windowTarget.location.href, incoming, 'The saved dataset link is preserved exactly');
-  f.controller.destroy();
-});
-
-test('invalid focused datasets retain their diagnostic URL and never apply an arbitrary bank', () => {
-  for (const query of ['dataset=unknown', 'dataset=second&dataset=third']) {
-    const f = fixture({ volumeDatasetFrames, volumeBank: volumeBank(), object: { detailedObjectId: 'detailed' } });
-    const incoming = `https://example.test/catalogue-a/?${query}`;
-    f.windowTarget.location = new URL(incoming);
-    f.controller.restore(incoming);
-    assert.equal(f.errors.length, 1);
-    assert.match(f.errors[0].message, /focus dataset/);
-    assert.equal(f.windowTarget.location.href, incoming);
-    assert.equal(f.owner.preparedFocus(), null);
-    assert.deepEqual(f.datasetWrites, []);
-    f.controller.destroy();
-  }
-});
-
-test("a scene page's dataset is the scene's own, never a focus dataset, and focused bank subscriptions are released on destruction", () => {
-  const f = fixture({ volumeDatasetFrames, volumeBank: volumeBank(), object: { detailedObjectId: 'detailed' } });
-  f.controller.restore(f.windowTarget.location.href);
-  assert.equal(f.datasetCallbacks.size, 1);
-  f.windowTarget.location = new URL('https://example.test/mercury/?dataset=third&v=saved');
-  f.controller.restore(f.windowTarget.location.href);
-  assert.equal(f.windowTarget.location.searchParams.get('dataset'), 'third');
-  assert.equal(f.windowTarget.location.searchParams.get('v'), 'saved');
-  assert.equal(f.datasetCallbacks.size, 0);
-  f.windowTarget.location = new URL('https://example.test/catalogue-a/?v=saved');
-  f.controller.restore(f.windowTarget.location.href);
-  assert.equal(f.datasetCallbacks.size, 1);
-  f.controller.destroy();
-  assert.equal(f.datasetCallbacks.size, 0);
-});
-
-
-test('an image-layer focus exposes its single optical dataset without volume-only actions', () => {
-  const f = fixture({ imageLayerFrames: {detailed:baseFrame}, object:{detailedObjectId:'detailed'} });
-  f.controller.restore('https://example.test/catalogue-a/?dataset=optical');
-  assert.deepEqual(f.errors, []);
-  const controls = required(last(f.content).presentation);
-  assert.equal(controls.selectedDataset, 'optical');
-  controls.selectDataset('optical');
-  assert.deepEqual(f.datasetWrites, []);
-  f.controller.destroy();
-});
-
-function deferredBank() {
-  let accept!: (bank: PreparedVolumeDatasetState) => void, reject!: (error: Error) => void;
-  const promise = new Promise<PreparedVolumeDatasetState>((resolve, fail) => { accept = resolve; reject = fail; });
-  return { promise, accept, reject };
-}
-function coldVolumeFixture() {
-  const load = deferredBank();
-  const f = fixture({ object: { detailedObjectId: 'detailed' },
-    volumeDatasetFrames: { detailed: { frame: baseFrame, framingRadiusUnits: 5268.814 } },
-    bankReady: load.promise, loadedFramingRadiusUnits: 1650 });
-  return { ...f, load };
-}
-
-test('cold native focus waits for the real bank framing before choosing a destination', async () => {
-  const f = coldVolumeFixture();
-  const restoring = f.controller.restore('https://example.test/catalogue-a/');
-  assert.deepEqual(f.flights, [], 'Loading may not fly using descriptor fallback bounds');
-  assert.equal(f.owner.preparedFocus(), null);
-  f.load.accept(volumeBank()); await restoring;
-  assert.equal(last(f.flightFocuses).framingRadiusM, 1650 * baseFrame.metersPerUnit);
-  assert.deepEqual(f.flights, [{id:'catalogue-a',reducedMotion:true}]);
-  assert.deepEqual(f.errors, []); f.controller.destroy();
-});
-
-test('ordinary cold selection waits for the same authored framing and cancellation prevents stale focus', async () => {
-  const f = coldVolumeFixture();
-  const selecting = f.controller.select({id:'catalogue-a'});
-  assert.deepEqual(f.flights, []);
-  f.load.accept(volumeBank()); await new Promise<void>(resolve => setImmediate(resolve));
-  assert.equal(last(f.flightFocuses).framingRadiusM, 1650 * baseFrame.metersPerUnit);
-  f.controller.suspend(); await selecting; f.controller.destroy();
-  const cancelled = coldVolumeFixture();
-  const stale = cancelled.controller.select({id:'catalogue-a'});
-  cancelled.controller.suspend();
-  cancelled.owner.setPreparedFocus({id:'newer-focus',positionM:[0,0,0],framingRadiusM:1,limits:{minimumDistanceM:1,maximumDistanceM:2}});
-  cancelled.load.accept(volumeBank()); await new Promise<void>(resolve => setImmediate(resolve));
-  assert.deepEqual(cancelled.flights, []); await stale;
-  assert.equal(cancelled.owner.preparedFocus()?.id, 'newer-focus');
-  assert.deepEqual(cancelled.errors, []); cancelled.controller.destroy();
-});
-
-test('cold saved camera keeps its pose while waiting for an explicitly selected dataset', async () => {
-  const f = coldVolumeFixture();
-  const restoring = f.controller.restore('https://example.test/catalogue-a/?dataset=second&v=exact-saved-pose');
-  assert.deepEqual(f.errors, []); assert.deepEqual(f.flights, []);
-  f.load.accept(volumeBank()); await restoring;
-  assert.deepEqual(f.flights, []); assert.equal(f.owner.preparedFocus()?.framingRadiusM,1650 * baseFrame.metersPerUnit);
-  assert.deepEqual(f.datasetWrites, ['second']); assert.deepEqual(f.errors, []); f.controller.destroy();
-});
-
-test('a failed bank load reports its actual error and never falls back to an inaccurate destination', async () => {
-  const f = coldVolumeFixture(), failed = Error('Failed to fetch prepared bank');
-  const restoring = f.controller.restore('https://example.test/catalogue-a/');
-  f.load.reject(failed); await restoring;
-  assert.deepEqual(f.flights, []); assert.equal(f.owner.preparedFocus(),null);
-  assert.deepEqual(f.errors,[failed]); f.controller.destroy();
-});
-
-test('a later saved restore supersedes a pending native focus without a delayed flight', async () => {
-  const f = coldVolumeFixture();
-  const old = f.controller.restore('https://example.test/catalogue-a/');
-  const newer = f.controller.restore('https://example.test/catalogue-b/?v=saved-later-pose');
-  f.load.accept(volumeBank()); await Promise.all([old,newer]);
-  assert.equal(f.owner.preparedFocus()?.id,'catalogue-b');
-  assert.deepEqual(f.flights,[]); assert.deepEqual(f.errors,[]); f.controller.destroy();
-});
-
-
-test('selecting a catalogue focus replaces the overview it supersedes', async () => {
-  const f = fixture();
-  f.windowTarget.location = new URL('https://example.test/sun/?overview=system');
-  const flight = f.controller.select({ id: 'catalogue-b' });
-  assert.equal(preparedFocusFromUrl(f.windowTarget.location, 'mercury'), 'catalogue-b');
-  assert.equal(f.windowTarget.location.searchParams.has('overview'), false,
-    'a focus and an overview are one camera, so the URL may name only one');
-  f.controller.suspend(); await flight;
-  assert.deepEqual(f.errors, []);
-  f.controller.destroy();
-});
-
-test('shared context receives the exact authoritative focus on restore, switch and clear', async () => {
-  const f = fixture({ object: { detailedObjectId: 'prepared-image' }, imageLayerFrames: { 'prepared-image': baseFrame } });
-  f.controller.restore(f.windowTarget.location.href);
-  assert.equal(last(f.presentationFocuses), f.owner.preparedFocus());
-  assert.equal(required(last(f.presentationFocuses)).framingRadiusM, 500 * baseFrame.metersPerUnit);
-  const selecting = f.controller.select({ id: 'catalogue-b' });
-  assert.equal(last(f.presentationFocuses), f.owner.preparedFocus());
-  assert.equal(required(last(f.presentationFocuses)).id, 'catalogue-b');
-  f.owner.setPreparedFocus(null);
-  assert.equal(f.presentationFocuses.at(-1), null);
-  f.controller.suspend(); await selecting;
-  f.controller.destroy();
-});
-
-test('a focus waiting for its lazy bank still owns the URL, and resolves to one state', async () => {
-  const bank = volumeBank();
-  const f = fixture({ volumeDatasetFrames, deferredVolumeBank: bank, object: { detailedObjectId: bank.objectId } });
-  f.windowTarget.location = new URL('https://example.test/catalogue-a/?overview=system');
-  const restoring = f.controller.restore(f.windowTarget.location.href);
-  // The runtime cannot report this focus yet, but the URL names it, so nothing
-  // may treat the selection as absent and write an overview over it.
-  assert.equal(f.owner.preparedFocus(), null);
-  assert.equal(preparedFocusFromUrl(f.windowTarget.location.href, 'mercury'), 'catalogue-a');
-  assert.equal(overviewScopeFromUrl(f.windowTarget.location.href, 'mercury'), null, 'a pending focus leaves no overview to resolve');
-  f.resolveDeferredVolumeBank(); await restoring;
-  assert.equal(f.owner.preparedFocus()?.id, 'catalogue-a');
-  assert.equal(preparedFocusFromUrl(f.windowTarget.location, 'mercury'), 'catalogue-a');
-  assert.equal(f.windowTarget.location.searchParams.has('overview'), false, 'exactly one state survives');
-  assert.deepEqual(f.errors, []);
-  f.controller.destroy();
-});
diff --git a/site/test/prepared-focus-card.test.mts b/site/test/prepared-focus-card.test.mts
deleted file mode 100644
index 7213d9943b7..00000000000
--- a/site/test/prepared-focus-card.test.mts
+++ /dev/null
@@ -1,196 +0,0 @@
-import assert from 'node:assert/strict';
-import { sourceTest } from '@cssearth/objects/node/source-test';
-const test = sourceTest();
-import { createPreparedFocusCard } from '../prepared-focus-card.mts';
-import type { PreparedGalaxyRecord } from '@cssearth/catalog';
-import type { PreparedFocusPresentation } from '../prepared-focus.mts';
-
-class Element extends EventTarget {
-  dataset: Record<string, string> = {}; selectors = new Map<string, Element | Element[]>(); attributes = new Map<string, string>(); hidden = false; checked = false; disabled = false; textContent = '';
-  querySelector(selector: string) { const value = this.selectors.get(selector); return value instanceof Element ? value : null; }
-  // A selector list answers each of its parts, as the card's detached-section lookups ask (detached-sections.ts).
-  querySelectorAll(selector: string): Element[] {
-    const own = selector.replace(', template[data-detached-section]', ''), whole = this.selectors.get(own);
-    if (whole !== undefined) return Array.isArray(whole) ? whole : [whole];
-    return own.split(', ').flatMap(part => { const value = this.selectors.get(part); return Array.isArray(value) ? value : value instanceof Element ? [value] : []; });
-  }
-  matches() { return true; }
-  setAttribute(name: string, value: string) { this.attributes.set(name, value); }
-  getAttribute(name: string) { return this.attributes.get(name) ?? null; }
-  removeAttribute(name: string) { this.attributes.delete(name); }
-}
-function fixture(unavailableObjects = '', { banksLater = false } = {}) {
-  const root = new Element(), bank = new Element(), datasetTab = new Element();
-  const tabs: string[] = [];
-  root.selectors.set('[data-information-tab="dataset"]', datasetTab);
-  const unavailable = new Element(); unavailable.dataset.unavailableObjects = unavailableObjects;
-  root.selectors.set('[data-focus-unavailable]', unavailable);
-  bank.dataset.focusDatasetBank = 'prepared-galaxy';
-  const ids = ['first', 'second', 'third'];
-  const buttons = ids.map(id => { const button = new Element(); button.setAttribute('value', id); return button; });
-  const details = ids.map(id => Object.assign(new Element(), { dataset: { focusDatasetDetails: id } }));
-  bank.selectors.set('[data-focus-dataset]', buttons);
-  bank.selectors.set('[data-focus-dataset-details]', details);
-  const factsBank = new Element(); factsBank.dataset.focusFactsBank = 'prepared-galaxy';
-  const facts = ids.map(id => Object.assign(new Element(), { dataset: { focusDatasetDetails: id }, textContent: 'Source pixels 2048 × 4096' }));
-  factsBank.selectors.set('[data-focus-dataset-details]', facts);
-  const spliceBanks = () => root.selectors.set('[data-focus-dataset-bank], [data-focus-facts-bank]', [bank, factsBank]);
-  if (!banksLater) spliceBanks();
-  for (const name of ['name', 'aliases', 'introduction', 'status', 'distance', 'uncertainty', 'membership', 'association']) {
-    root.selectors.set(`[data-focus-${name}]`, new Element());
-  }
-  root.selectors.set('[data-focus-aliases-row]', new Element());
-  root.selectors.set('[data-focus-learn-more]', new Element());
-  const record: PreparedGalaxyRecord = { id: 'catalogue:galaxy', detailedObjectId: 'prepared-galaxy', name: 'Prepared galaxy', aliases: [], status: 'confirmed',
-    positionM: [0, 0, 0], skyPosition: { raDeg: 0, decDeg: 0, sourceRef: 'observations' },
-    distance: { valuePc: 50000, sourceRef: 'observations', method: 'Published distance' }, membership: { group: 'local-group', subgroup: 'milky-way', basis: 'Published membership' } };
-  const presentation: PreparedFocusPresentation = { id: 'first', defaultDataset: 'first', objectId: 'prepared-galaxy', selectedDataset: 'first', starsVisible: true,
-    datasets: ids.map(id => ({ id, label: id, title: id, description: id, sourceUrl: 'https://example.test/source' })), selectDataset() {} };
-  // This retained DOM stand-in implements only the card's queried fields and events.
-  return { root, bank, factsBank, spliceBanks, facts, buttons, details, record, presentation, datasetTab, tabs, unavailable,
-    card: createPreparedFocusCard(root as unknown as HTMLElement, id => tabs.push(id)) };
-}
-
-test('an unavailable volume keeps catalogue facts and a retained explanation, without stale dataset controls', () => {
-  const f = fixture('prepared-galaxy');
-  f.card.set(f.record);
-  assert.equal(f.unavailable.hidden, false);
-  assert.match(f.unavailable.textContent, /3D view of Prepared galaxy is unavailable/);
-  assert.equal(f.datasetTab.hidden, true);
-  assert.equal(f.bank.hidden, true);
-  assert.equal(f.root.querySelector('[data-focus-distance]')?.textContent, '50 kpc');
-  f.card.set({ ...f.record, detailedObjectId: undefined });
-  assert.equal(f.unavailable.hidden, true);
-  f.card.set(f.record); f.card.set(null);
-  assert.equal(f.unavailable.hidden, true);
-  f.card.destroy();
-});
-
-test('prepared focus datasets retain controls and reflect only the applied runtime selection', () => {
-  const f = fixture(), requested: string[] = [];
-  f.presentation.selectDataset = id => requested.push(id);
-  f.card.set(f.record, [], f.presentation);
-  assert.equal(f.bank.hidden, false);
-  assert.equal(f.buttons[0].getAttribute('aria-pressed'), 'true');
-  assert.deepEqual(f.details.map(detail => detail.hidden), [false, true, true]);
-  assert.equal(f.factsBank.hidden, false);
-  assert.deepEqual(f.facts.map(detail => detail.hidden), [false, true, true]);
-  f.buttons[1].dispatchEvent(new Event('click'));
-  assert.deepEqual(requested, ['second']);
-  assert.equal(f.buttons[0].getAttribute('aria-pressed'), 'true', 'Do not publish a dataset before the runtime applies it');
-  const retained = [...f.buttons, ...f.details];
-  f.card.set(f.record, [], { ...f.presentation, selectedDataset: 'second' });
-  assert.deepEqual(f.buttons.map(button => button.getAttribute('aria-pressed')), ['false', 'true', 'false']);
-  assert.deepEqual(f.details.map(detail => detail.hidden), [true, false, true]);
-  assert.deepEqual(f.facts.map(detail => detail.hidden), [true, false, true]);
-  assert.deepEqual([...f.bank.querySelectorAll('[data-focus-dataset]'), ...f.bank.querySelectorAll('[data-focus-dataset-details]')], retained);
-  f.card.set(f.record, [], { ...f.presentation, selectedDataset: 'third' });
-  f.card.destroy();
-  f.buttons[0].dispatchEvent(new Event('click'));
-  assert.deepEqual(requested, ['second']);
-});
-
-test('departed or unsupported galaxy focus hides its retained dataset bank and disables stale actions', () => {
-  const f = fixture(), requested: string[] = [];
-  f.presentation.selectDataset = id => requested.push(id);
-  f.card.set(f.record, [], f.presentation);
-  f.card.set({ ...f.record, detailedObjectId: 'image-galaxy' });
-  assert.equal(f.bank.hidden, true);
-  assert.equal(f.factsBank.hidden, true);
-  f.buttons[1].dispatchEvent(new Event('click'));
-  assert.deepEqual(requested, []);
-  f.card.set(f.record, [], f.presentation);
-  assert.equal(f.bank.hidden, false);
-  f.card.set(null);
-  assert.equal(f.root.hidden, false, 'the selection presentation owns the card\'s visibility');
-  assert.equal(f.bank.hidden, true);
-  f.buttons[2].dispatchEvent(new Event('click'));
-  assert.deepEqual(requested, []);
-  f.card.destroy();
-});
-
-test('a nebula focus keeps classification out of the title and preserves the shared dataset controls', () => {
-  const f = fixture();
-  const { membership: _membership, ...common } = f.record;
-  f.card.set({ ...common, kind: 'nebula', detailedObjectId: 'prepared-galaxy',
-    aliases: ['Example 1'], introduction: { text: 'A source-backed introduction to this nebula.', sourceRefs: ['observations'] },
-    classification: { name: 'Emission nebula', basis: 'Conditional image reconstruction.', sourceRef: 'observations' } }, [], f.presentation);
-  assert.equal(f.root.querySelector('[data-focus-introduction]')?.textContent, 'A source-backed introduction to this nebula.');
-  assert.equal(f.root.querySelector('[data-focus-aliases]')?.textContent, 'Example 1');
-  assert.equal(f.root.querySelector('[data-focus-aliases-row]')?.hidden, false);
-  assert.equal(f.root.querySelector('[data-focus-status]')?.textContent, '');
-  assert.equal(f.root.querySelector('[data-focus-status]')?.hidden, true);
-  assert.equal(f.root.querySelector('[data-focus-membership]')?.textContent, 'Milky Way');
-  assert.equal(f.root.querySelector('[data-focus-association]')?.textContent, 'Galactic nebula');
-  assert.equal(f.bank.hidden, false);
-  f.card.set(f.record, [], f.presentation);
-  assert.equal(f.root.querySelector('[data-focus-status]')?.hidden, false, 'A later galaxy restores its status tag');
-  f.card.destroy();
-});
-
-test('a globular-cluster focus keeps its stellar classification and the shared dataset controls', () => {
-  const f = fixture();
-  const { membership: _membership, ...common } = f.record;
-  f.card.set({ ...common, kind: 'globular-cluster', detailedObjectId: 'prepared-galaxy',
-    introduction: { text: 'A source-backed introduction to this cluster.', sourceRefs: ['observations'] },
-    classification: { name: 'Globular cluster', basis: 'Integrated stellar light.', sourceRef: 'observations' } }, [], f.presentation);
-  assert.equal(f.root.querySelector('[data-focus-introduction]')?.textContent, 'A source-backed introduction to this cluster.');
-  assert.equal(f.root.querySelector('[data-focus-status]')?.textContent, '');
-  assert.equal(f.root.querySelector('[data-focus-status]')?.hidden, true, 'Galactic volumes keep classification out of the title');
-  assert.equal(f.root.querySelector('[data-focus-membership]')?.textContent, 'Milky Way');
-  assert.equal(f.root.querySelector('[data-focus-association]')?.textContent, 'Galactic globular cluster');
-  assert.equal(f.root.querySelector('[data-focus-basis]'), null, 'Model and measurement notes stay out of the standard Factsheet rows');
-  assert.equal(f.bank.hidden, false);
-  assert.equal(f.datasetTab.hidden, false);
-  f.card.destroy();
-});
-
-test('focus uses shared dataset tabs only when a prepared presentation is available', () => {
-  const f = fixture();
-  f.card.set(f.record);
-  assert.equal(f.datasetTab.hidden, true);
-  assert.deepEqual(f.tabs, ['factsheet']);
-  f.card.set(f.record, [], f.presentation);
-  assert.equal(f.datasetTab.hidden, false);
-  assert.deepEqual(f.tabs, ['factsheet', 'dataset']);
-  f.card.set(f.record, [], { ...f.presentation, selectedDataset: 'second' });
-  assert.deepEqual(f.tabs, ['factsheet', 'dataset'], 'Dataset updates preserve the user’s current information tab');
-  f.card.set({ ...f.record, id: 'catalogue:other', detailedObjectId: undefined });
-  assert.equal(f.datasetTab.hidden, true);
-  assert.deepEqual(f.tabs, ['factsheet', 'dataset', 'factsheet']);
-  f.card.destroy();
-});
-
-test('banks spliced after a focus is presented are adopted and show the current selection', () => {
-  const f = fixture('', { banksLater: true }), requested: string[] = [];
-  f.presentation.selectDataset = id => requested.push(id);
-  f.card.set(f.record, [], { ...f.presentation, selectedDataset: 'second' });
-  // Spliced banks arrive hidden, as the fragment renders them.
-  f.bank.hidden = true; f.factsBank.hidden = true;
-  f.spliceBanks();
-  f.card.adoptBanks();
-  assert.equal(f.bank.hidden, false);
-  assert.deepEqual(f.buttons.map(button => button.getAttribute('aria-pressed')), ['false', 'true', 'false']);
-  assert.deepEqual(f.facts.map(detail => detail.hidden), [true, false, true]);
-  f.card.adoptBanks();
-  f.buttons[2].dispatchEvent(new Event('click'));
-  assert.deepEqual(requested, ['third'], 'Adopting twice binds each control once');
-  f.card.destroy();
-});
-
-
-test('Wikipedia follows the selected focus without replacing the retained link', () => {
-  const f = fixture();
-  const link = f.root.querySelector('[data-focus-learn-more]')!;
-  f.card.set({ ...f.record, aliases: ['Example'] });
-  assert.equal(link.hidden, false);
-  assert.equal(new URL(link.getAttribute('href')!).searchParams.get('search'), 'Prepared galaxy');
-  f.card.set({ ...f.record, name: 'Another galaxy', aliases: ['Other'] });
-  assert.equal(f.root.querySelector('[data-focus-learn-more]'), link);
-  assert.equal(new URL(link.getAttribute('href')!).searchParams.get('search'), 'Another galaxy');
-  f.card.set(f.record);
-  assert.equal(link.hidden, true, 'No introduction leaves no orphaned Learn more link');
-  f.card.set(null);
-  assert.equal(link.hidden, true);
-  f.card.destroy();
-});
diff --git a/site/test/prepared-world-context.test.ts b/site/test/prepared-world-context.test.ts
index d3dd92078a0..1c367ed7881 100644
--- a/site/test/prepared-world-context.test.ts
+++ b/site/test/prepared-world-context.test.ts
@@ -19,6 +19,7 @@ import { type PackedWorldContextView, unpackWorldBodies } from '../../packages/r
 import { createWorldContextPlanner } from '../../packages/renderer/src/universe/world-context/world-context-planner.js';
 import { CONTEXT_LINE_WIDTH, INDICATOR_DOT_MAX_DIAMETER, indicatorDotDiameter } from '../../packages/renderer/src/universe/world-context/context-scale.js';
 import { SCENE_OBJECTS } from '../objects.mts';
+import { isPlacedClassification } from '@cssearth/objects';
 import { labelImportance } from '../../packages/renderer/src/labels/universe-label-policy.js';
 import { SYSTEM_RANGES, SYSTEM_VIEWS, SYSTEM_VIEW_HOSTS, loadSystemView, systemFramingRect, systemViewTarget } from '../system-framing.mts';
 import { stubGlobal, unstubAllGlobals } from '@cssearth/objects/node/contract';
@@ -761,17 +762,19 @@ test('accepts the generated Sun context and rejects detached or malformed prepar
   const source = JSON.parse(await readFile(fileURLToPath(new URL('../../src/objects/sun/prepared/world-context.json', import.meta.url)), 'utf8')) as Record<string, unknown>;
   const [{ readCatalog }, { parseNavigationDistance }] = await Promise.all([import('@cssearth/objects/node'), import('@cssearth/objects')]);
   // Each entry's distance as `prepare:catalog` placed it in the registry.
-  const distance = (descriptor: unknown) => parseNavigationDistance(SCENE_OBJECTS.find(object => object.id === (descriptor as { id: string }).id)?.distance);
+  // Every body of the world: the scenes, the packages the host draws (galaxies, clusters, nebulae) and the levels that are bodies.
+  const worldObjects = (await import('@cssearth/objects/node')).readPreparedObjects(fileURLToPath(new URL('../..', import.meta.url))).worldObjects;
+  const distance = (descriptor: unknown) => parseNavigationDistance(worldObjects.find(object => object.id === (descriptor as { id: string }).id)?.distance);
   const contextEntries = (await readCatalog(fileURLToPath(new URL('../../src/objects', import.meta.url)), distance)).filter(body => body.context && body.id !== 'sun')
     .sort((a, b) => (a.context!.order ?? Number.MAX_SAFE_INTEGER) - (b.context!.order ?? Number.MAX_SAFE_INTEGER) || a.id.localeCompare(b.id, 'en'));
   // Bodies drawn from their astronomy records around a packaged host follow the catalogue's own entries.
   assert.deepEqual(parsePreparedWorldContext(source).bodies.filter(body => !body.unpackaged).map(body => body.id), contextEntries.map(body => body.id));
   for (const body of parsePreparedWorldContext(source).bodies.filter(body => !body.unpackaged)) {
-    const frame = SCENE_OBJECTS.find(object => object.id === body.id)!.worldFrame!;
+    const frame = worldObjects.find(object => object.id === body.id)!.worldFrame!;
     assert.equal(body.radiusM, frame.bodyRadiusM, `${body.id} context must match the selectable detail radius`);
     expectAlignedContextOrigin(body.positionM, frame.originM, `${body.id} context must match the selectable detail origin`);
-    // A placed star or black hole has no orbit in the Sun's context; every orbiting body's orbit facts are prepared.
-    if (!body.orbit) { assert.ok((['star', 'black-hole']).includes(SCENE_OBJECTS.find(object => object.id === body.id)!.classification)); continue; }
+    // A placed body (a star, a black hole, a galaxy, a cluster, a nebula) has no orbit in the Sun's context; every orbiting body's orbit facts are prepared.
+    if (!body.orbit) { assert.ok(isPlacedClassification(worldObjects.find(object => object.id === body.id)!.classification)); continue; }
     assert.notEqual(body.orbit.bounds, undefined, `${body.id} orbit bounds are owned by preparation`);
     assert.deepEqual(([...body.orbit.activeChords!]), [...body.orbit.trail].flatMap((weight, index) => weight > 0 ? [index] : []));
     assert.deepEqual([...(body.orbit.extentChords ?? [])].sort((a, b) => a - b), [...body.orbit.activeChords!]);
diff --git a/site/test/prepared-world-navigation.test.mts b/site/test/prepared-world-navigation.test.mts
index 03ad39e3312..3ad96b9fa85 100644
--- a/site/test/prepared-world-navigation.test.mts
+++ b/site/test/prepared-world-navigation.test.mts
@@ -11,7 +11,6 @@ import { createPreparedWorldNavigation } from '../prepared-world-navigation.mts'
 import { required, position, navigationFixture, unusedSharedView } from './navigation-test-values.mts';
 import type { PreparedWorldCameraFrame, WorldCameraPose, WorldCameraPresentation } from '@cssearth/renderer/navigation/world-camera.ts';
 import type { ObjectWorldNavigation } from '@cssearth/renderer/runtime/world-navigation-types.ts';
-import type { PreparedNavigationFocus } from '@cssearth/renderer/navigation/prepared-focus.ts';
 import type { ObjectSceneLifecycle } from '@cssearth/renderer/runtime/object-scene.ts';
 import type { ObjectPreparationView } from '@cssearth/renderer/runtime/prepared-object-navigation.ts';
 import type { SceneFactory } from '../browser/browser-types.mts';
@@ -26,7 +25,7 @@ type MockLease = { resources: Resources; destroy(): void; projection(): undefine
 type MockPreparation = { frame: Mutable<PreparedWorldCameraFrame>; framingRadius(): Promise<number>; framingScale(): Promise<number>; prepare(options: { getView(): ObjectPreparationView }): Promise<MockLease> };
 type MockFactory = { navigation: MockPreparation };
 type PrepareOptions = Omit<Partial<Parameters<ReturnType<typeof createPreparedWorldNavigation>['prepare']>[0]>, 'toFactory'> & { toFactory?: MockFactory | Promise<MockFactory> };
-type MockNavigation = Omit<ObjectWorldNavigation, 'frame'> & { frame: Mutable<PreparedWorldCameraFrame>; activePreparedFocus: PreparedNavigationFocus | null };
+type MockNavigation = Omit<ObjectWorldNavigation, 'frame'> & { frame: Mutable<PreparedWorldCameraFrame> };
 const lifecycle = { ready: Promise.resolve(), sharedView: unusedSharedView, pause() {}, resume() {}, destroy() {} } satisfies Omit<ObjectSceneLifecycle, 'navigation'>;
 /** CSS presentation to a right-handed reference: a reflection. */
 const identity = [1,0,0,0,-1,0,0,0,1] as const;
@@ -44,9 +43,6 @@ function fixtureFactory(arrival?: PreparedArrivalView) {
   const windowTarget = { performance: { now: () => time }, matchMedia: () => ({ matches: true }), requestAnimationFrame(fn: FrameRequestCallback) { callbacks.set(++next, fn); return next; },
     cancelAnimationFrame(id: number) { callbacks.delete(id); } };
   const navigation: MockNavigation = { ...navigationFixture(frames[0], () => current, () => { throw new Error("optics overridden"); }), frame: frames[0], capture: () => current,
-    activePreparedFocus: null,
-    preparedFocus() { return this.activePreparedFocus; },
-    setPreparedFocus(focus) { this.activePreparedFocus = focus; },
     optics: () => ({ focalPixels: 1000, principalOffsetPixels: [0,0], widthPixels: 2000, heightPixels: 2000,
       framingRadiusPixels: 200, detailHandoffDiameterPixels: 14, visibleRect: null }),
     apply(value) { current = value; paints.push(value); } };
@@ -440,21 +436,6 @@ test('the same object can recenter at overview distance without resetting to its
   closePose(f.navigation.capture().pose, targetWorldCamera.pose);
 });
 
-test('ordinary planet selection clears a prepared catalogue pivot for both same-owner focus and detail handoff', async () => {
-  for (const sameOwner of [true, false]) {
-    const f = fixtureFactory();
-    f.navigation.setPreparedFocus({ id: 'catalogue:7', positionM: [0,0,0], framingRadiusM: 1, limits: { minimumDistanceM: 1, maximumDistanceM: 1e20 } });
-    const before = f.navigation.capture();
-    const task = sameOwner
-      ? f.service.focus({ objectId: '0', mount: { sharedView: unusedSharedView, navigation: f.navigation }, signal: f.controller.signal, reducedMotion: true })
-      : f.start({ preserveView: true });
-    assert.equal(f.navigation.preparedFocus(), null);
-    assert.equal(f.navigation.capture(), before, 'Clearing the input pivot cannot move the existing observer');
-    const result = await drainFrames<void | WorldHandoff>(f, { task });
-    if (!sameOwner) { assert.ok(result); await result.afterMount(f.mounted()); }
-    f.controller.abort();
-  }
-});
 // The synthetic optics use a 2000px square viewport. A sphere beside the
 // eye plane can have a huge projected ellipse entirely outside that viewport.
 const proxyVisible = (view: WorldCameraPresentation) => view.silhouette !== null && view.centerPixels !== null &&
diff --git a/site/test/search-response.test.mts b/site/test/search-response.test.mts
index 36ec1fdbd44..a3187eb27e3 100644
--- a/site/test/search-response.test.mts
+++ b/site/test/search-response.test.mts
@@ -17,15 +17,15 @@ const index = { schema: 'cssearth-prepared-feature-index@2',
   features: [{ objectId: 'moon', id: 'tycho', name: 'Tycho', type: 'Crater', diameterKm: 85,
     searchNames: ['tycho'], searchContext: 'crater' }], places: [] };
 const pin = { url: '/features/index.json', count: 1 };
-const entry = (kind: 'scene' | 'prepared-focus', name: string, classification: string, distanceMeters: number, searchNames: string[] = []): CatalogueIndexEntry => {
+const entry = (kind: 'scene' | 'bank', name: string, classification: string, distanceMeters: number, searchNames: string[] = []): CatalogueIndexEntry => {
   const id = name.toLowerCase();
-  return { kind, id, name, searchNames, classification, classificationName: classification, systemName: 'solar system',
+  return { kind: 'scene', id, name, searchNames, classification, classificationName: classification, systemName: 'solar system',
     route: `/${id}/`, illustration: false, distanceMeters,
     detail: { text: `${distanceMeters} m`, title: 'Observer distance', ariaLabel: `${distanceMeters} m. Observer distance` },
-    source: { subject: `${kind === 'scene' ? 'object' : 'focus'}:${id}`, document: `/sources/${id}/`, label: `Sources for ${name}` },
-    marker: kind === 'scene' ? { kind: 'scene', id: 'saturn', color: '#fff' } : { kind: 'focus', thumbnail: null } };
+    source: { subject: `object:${id}`, document: `/sources/${id}/`, label: `Sources for ${name}` },
+    marker: kind === 'scene' ? { kind: 'scene', id: 'saturn', color: '#fff' } : { kind: 'thumbnail', thumbnail: null } };
 };
-const entries = [entry('scene', 'Saturn', 'planet', 1), entry('scene', 'Titan', 'satellite', 2), entry('prepared-focus', 'M42', 'nebula', 3, ['orion nebula', 'm42'])];
+const entries = [entry('scene', 'Saturn', 'planet', 1), entry('scene', 'Titan', 'satellite', 2), entry('bank', 'M42', 'nebula', 3, ['orion nebula', 'm42'])];
 const reads: string[] = [];
 const data = (catalogue = entries, read: SearchData['read'] = async path => { reads.push(path); if (path === pin.url) return index; throw new Error(`${path} is not prepared.`); }): SearchData =>
   ({ pin, read, catalogue: async () => catalogue });
@@ -40,7 +40,6 @@ const html = `<!doctype html><html><head><style>u { color: red }</style></head><
     <details class="object-feature-results" hidden><summary>Named features <span class="object-panel-heading-count"></span></summary><p class="object-destination-hint"></p>
       <ul><li hidden><a class="object-destination-result"><span class="object-destination-result-name"></span><span class="object-destination-result-context"></span></a></li></ul></details></div>
   </nav><div class="object-selected-content"><div class="object-context" hidden>
-    <div data-prepared-focus-card hidden><span data-focus-name></span></div>
     <div data-large-scale-overview="milky-way" data-large-scale-name="Milky Way" data-neighbor-home="observer" hidden>Milky Way</div>
     <div data-large-scale-overview="local-group" data-large-scale-name="Local Group" hidden></div>
     <div data-large-scale-overview="nearby-universe" data-large-scale-name="Nearby Universe" hidden></div>
@@ -57,7 +56,7 @@ test('native search lists the rows the find function would answer, with the same
   assert.deepEqual(visibleNames(document), ['M42']);
   const row = document.querySelector('[data-catalogue-list] .object-item a');
   assert.equal(row?.getAttribute('href'), '/m42/');
-  assert.equal(row?.getAttribute('data-source-subject'), 'focus:m42');
+  assert.equal(row?.getAttribute('data-source-subject'), 'object:m42');
   const live = parseFindResponse(await (await handleFindRequest(new Request(`${origin}/.netlify/functions/find?object=saturn&q=orion`), data())).json());
   assert.deepEqual(live.objects.rows.map(result => result.name), visibleNames(document));
 });
@@ -124,30 +123,11 @@ test('typed search shows a flat result list, including queries that name an over
 });
 
 const contextHtml = html
-  .replace('</form>', '<a class="object-sidebar-search-clear" href="/saturn/">Clear search</a></form>')
-  .replace('<div data-prepared-focus-card hidden><span data-focus-name></span></div>',
-    '<div data-prepared-focus-card data-prepared-focus-id="m42" hidden><span data-focus-name>Orion Nebula</span></div>');
-
-test('a focus page that also names an overview resolves to the focus alone', async () => {
-  const card = (path: string) => render(path, data(), contextHtml);
-  const overview = await card('/saturn/?overview=system');
-  assert.equal(overview.querySelector<HTMLElement>('.object-context [data-system-results]')?.hidden, false);
-  assert.equal(overview.querySelector<HTMLElement>('.object-context')?.hidden, false);
-  for (const query of ['/m42/?overview=system', '/m42/?overview=system&q=']) {
-    const both = await card(query);
-    assert.equal(both.querySelector<HTMLElement>('[data-prepared-focus-card]')?.hidden, false, query);
-    assert.equal(both.querySelector<HTMLElement>('.object-context [data-system-results]'), null, query);
-    assert.equal(both.querySelector<HTMLElement>('.object-context [data-large-scale-overview="milky-way"]'), null, query);
-    // Clearing a search keeps the view context, normalized the same way.
-    const clear = new URL(both.querySelector('.object-sidebar-search-clear')?.getAttribute('href') ?? '/', origin);
-    assert.equal(clear.pathname, '/m42/', query);
-    assert.equal(clear.searchParams.has('overview'), false, query);
-  }
-});
+  .replace('</form>', '<a class="object-sidebar-search-clear" href="/saturn/">Clear search</a></form>');
 
 test('native and live selections share card visibility, inertness, labels and system headers', async () => {
   const state = (document: Document) => [...document.querySelectorAll<HTMLElement>(
-    '.object-context, .object-information-panel, [data-prepared-focus-card], [data-large-scale-overview], [data-system-results], [data-system-header], [data-solar-system-facts]')]
+    '.object-context, .object-information-panel, [data-large-scale-overview], [data-system-results], [data-system-header], [data-solar-system-facts]')]
     .map(element => ({ hidden: element.hidden, inert: element.hasAttribute('inert'), label: element.getAttribute('aria-label'), current: element.hasAttribute('data-system-current') }));
   const cases = [
     ['', 'saturn', { kind: 'object', objectId: 'saturn' }, '/saturn/'],
@@ -156,8 +136,6 @@ test('native and live selections share card visibility, inertness, labels and sy
     ['', 'sun', { kind: 'overview', overview: { scope: 'milky-way', systemId: 'sun' } }, '/milky-way/'],
     ['', 'sun', { kind: 'overview', overview: { scope: 'local-group', systemId: 'sun' } }, '/local-group/'],
     ['', 'sun', { kind: 'overview', overview: { scope: 'nearby-universe', systemId: 'sun' } }, '/nearby-universe/'],
-    // A catalogue focus's page draws its host scene: the focus wins over an overview it also names.
-    ['?overview=system', 'saturn', { kind: 'focus', id: 'm42' }, '/m42/'],
   ] as const;
   for (const [query, objectId, subject, page] of cases) {
     const source = contextHtml.replace('data-search-object="saturn"', `data-search-object="${objectId}"`);
@@ -167,7 +145,7 @@ test('native and live selections share card visibility, inertness, labels and sy
     present.present({ kind: 'overview', overview: { scope: 'system', systemId: 'sun' } });
     present.present(subject);
     assert.deepEqual(state(native), state(live), query || 'body');
-    // The context is mounted only while an overview or a focus is the subject.
+    // The context is mounted only while an overview is the subject.
     const context = native.querySelector<HTMLElement>('.object-context');
     assert.equal(context === null, subject.kind === 'object');
     if (context) assert.equal(context.hidden || context.hasAttribute('inert'), false);
diff --git a/site/test/surface-label-loop.test.mts b/site/test/surface-label-loop.test.mts
index 1ddd68dc380..7bfd75335e8 100644
--- a/site/test/surface-label-loop.test.mts
+++ b/site/test/surface-label-loop.test.mts
@@ -24,7 +24,7 @@ test('surface labels keep no frame loop while they are off, the default', async
   const labels = mountSurfaceFeatureLabels({ host: document.getElementById('host')!, plan, objectId: 'moon', target: document.getElementById('mesh')!,
     pickingHost: host, inputSurface: host, flightLimits: unused,
     navigation: { motion: createCameraMotion(), frame: { referenceFrame:'test',epochJdTt:1,originM:[0,0,0],presentationToReference:[1,0,0,0,1,0,0,0,1],metersPerUnit:1,bodyRadiusM:1 },
-      capture:unused,apply:unused,preparedFocus:unused,setPreparedFocus:unused,flyToPreparedFocus:unused,optics:unused,subscribe:unused },
+      capture:unused,apply:unused,optics:unused,subscribe:unused },
     scene: document.getElementById('scene')!, zoomRange: () => ({ minimum: 1, maximum: 2 }), lifetime, onError() {},
     // Hold the catalogue while checking the disabled loop, then explicitly release it to check pool allocation.
     transport: () => new Promise<Response>(resolve => { release = resolve; }) });
diff --git a/site/test/view-readout.test.mts b/site/test/view-readout.test.mts
index 9c526d72453..aca35b20a1c 100644
--- a/site/test/view-readout.test.mts
+++ b/site/test/view-readout.test.mts
@@ -4,7 +4,7 @@ import type { WorldCameraPose } from '@cssearth/renderer/navigation/world-camera
 import type { WorldRotation } from '@cssearth/renderer/navigation/world-camera-math.ts';
 import { required } from './navigation-test-values.mts';
 import { formatViewCoordinate, formatViewDate, formatViewDistance, viewScale } from '../minimap/view-format.mts';
-import { measurePreparedFocusView } from '../view-readout.mts';
+import { measureExtendedSubjectView } from '../view-readout.mts';
 import { measureView, pickUnitSphere } from '../minimap/view-measure.mts';
 const test = sourceTest();
 
@@ -64,13 +64,13 @@ test('galaxy distances keep a finite ruler without a spurious surface hit', () =
 });
 
 test('prepared focus uses its own depth plane for scale and never supplies planetary coordinates', () => {
-  const focus: Parameters<typeof measurePreparedFocusView>[1] = { name: 'Prepared galaxy', positionM: [1e20, 0, 0] };
+  const focus: Parameters<typeof measureExtendedSubjectView>[1] = { name: 'Prepared galaxy', positionM: [1e20, 0, 0] };
   const world: WorldCameraPose = { referenceFrame: 'sun-icrf', epochJdTt: 2461286.5, pose: { positionM: [1e20, 0, 1e18], orientationXyzw: [0,0,0,1] } };
-  const value = measurePreparedFocusView(world, focus, 1000);
+  const value = measureExtendedSubjectView(world, focus, 1000);
   assert.deepEqual(value.scale, viewScale(1e15));
   assert.equal(value.coordinates, null);
   assert.equal(value.scaleTitle, 'Scale at the distance of Prepared galaxy');
-  assert.equal(measurePreparedFocusView({ ...world, pose: { ...world.pose, orientationXyzw: [0,1,0,0] } }, focus, 1000).scale, null);
+  assert.equal(measureExtendedSubjectView({ ...world, pose: { ...world.pose, orientationXyzw: [0,1,0,0] } }, focus, 1000).scale, null);
 });
 
 
diff --git a/site/view-readout.mts b/site/view-readout.mts
index d17550afad9..23db18ef5b1 100644
--- a/site/view-readout.mts
+++ b/site/view-readout.mts
@@ -1,5 +1,4 @@
 import { formatViewDate, formatViewDistance, formatViewCoordinate, viewScale } from './minimap/view-format.mts';
-import type { PreparedCatalogObject } from '@cssearth/catalog';
 import type { WorldCameraPose } from '@cssearth/renderer/navigation/world-camera.ts';
 import type { PositionM } from '@cssearth/engine';
 import type { BrowserWindow, ShellCamera, PlaybackState } from './browser/browser-types.mts';
@@ -13,10 +12,11 @@ import { measureView } from './minimap/view-measure.mts';
 import { surfaceMapContext, surfaceMapViewport } from './minimap/surface-map-context.mts';
 import { viewDistance } from './overview-context.mts';
 import { dotN as dot } from '@cssearth/core';
-type PreparedFocus = Pick<PreparedCatalogObject, 'name' | 'positionM'>;
-interface ViewReadout { bindObject(): void; setPreparedFocus(record: PreparedFocus | null): void; setCamera(camera: ShellCamera | null): void; setOverviewScope(scope: OverviewScope): void; setPlaybackState(state: PlaybackState): void; setNavigationInFlight(active: boolean): void; destroy(): void; }
+/** A subject with no surface (a galaxy, a cluster, a nebula): the readout measures to its centre, not above a radius. */
+type ExtendedSubject = { readonly name: string; readonly positionM: readonly [number, number, number] };
+interface ViewReadout { bindObject(): void; setExtendedSubject(record: ExtendedSubject | null): void; setCamera(camera: ShellCamera | null): void; setOverviewScope(scope: OverviewScope): void; setPlaybackState(state: PlaybackState): void; setNavigationInFlight(active: boolean): void; destroy(): void; }
 
-export function measurePreparedFocusView(world: WorldCameraPose, focus: PreparedFocus, focalPixels: number) {
+export function measureExtendedSubjectView(world: WorldCameraPose, focus: ExtendedSubject, focalPixels: number) {
   const forward = rotateWorldPosition(worldRotationFromQuaternion(world.pose.orientationXyzw), [0, 0, -1]);
   const relative: PositionM = [focus.positionM[0] - world.pose.positionM[0], focus.positionM[1] - world.pose.positionM[1], focus.positionM[2] - world.pose.positionM[2]];
   return { coordinates: null, scale: viewScale(dot(relative, forward) / focalPixels),
@@ -26,7 +26,7 @@ export function measurePreparedFocusView(world: WorldCameraPose, focus: Prepared
 export function createViewReadout({ drawer, documentTarget, windowTarget, surfaceReader }: { drawer: HTMLElement; documentTarget: Document; windowTarget: BrowserWindow; surfaceReader?: SurfaceMapReader }): ViewReadout {
   // The footer holding the readout waits off the page on narrow layouts (layout-sections.mts); the readout keeps it current.
   const root = sectionElements(documentTarget, '.object-view-readout')[0];
-  if (!root) return { bindObject() {}, setCamera() {}, setPreparedFocus() {}, setOverviewScope() {}, setPlaybackState() {}, setNavigationInFlight() {}, destroy() {} };
+  if (!root) return { bindObject() {}, setCamera() {}, setExtendedSubject() {}, setOverviewScope() {}, setPlaybackState() {}, setNavigationInFlight() {}, destroy() {} };
   const dateGroup = requiredElement(root, '.object-view-date'), date = requiredElement(root, '[data-view-date]');
   const coordinates = requiredElement(root, '.object-view-coordinates');
   const latitude = requiredElement(root, '[data-view-latitude]'), longitude = requiredElement(root, '[data-view-longitude]');
@@ -42,7 +42,7 @@ export function createViewReadout({ drawer, documentTarget, windowTarget, surfac
   let camera: ShellCamera | null = null, unsubscribe: (() => void) | null = null, frame: number | null = null; let playing = false, flying = false, moving = false;
   let timer: number | null = null, dateDay: number | null = null, playbackReason: string | null = null; let lastRender = -Infinity;
   let overviewScope: OverviewScope = 'system';
-  let preparedFocus: PreparedFocus | null = null;
+  let extendedSubject: ExtendedSubject | null = null;
   const hidden = (element: HTMLElement, value: boolean) => { if (element.hidden !== value) element.hidden = value; };
   const write = (element: HTMLElement, value: string) => { if (element.textContent !== value) element.textContent = value; };
   /** Drop a scheduled render: the page hid, a flight began, or the readout retired. */
@@ -65,18 +65,18 @@ export function createViewReadout({ drawer, documentTarget, windowTarget, surfac
     const scene = sectionElements(documentTarget, '.polycss-scene')[0];
     if (!navigation || !scene) { clearReading({ date: true }); return; }
     const map = maps.find(map => !map.closest<HTMLElement>('[data-dataset-details]')?.hidden) ?? maps[0];
-    const surface = preparedFocus ? null : surfaceReader ? surfaceReader.read(map, camera)
+    const surface = extendedSubject ? null : surfaceReader ? surfaceReader.read(map, camera)
       : surfaceMapContext(map ? configs.get(map) : undefined, camera, documentTarget, windowTarget);
     const world = navigation.capture(), optics = navigation.optics();
     hidden(dateGroup, !Number.isFinite(world.epochJdTt));
     const day = Number.isFinite(world.epochJdTt) ? Math.floor(world.epochJdTt + .5) : null;
     if (day !== dateDay) { dateDay = day; write(date, formatViewDate(world.epochJdTt)); }
-    const value = preparedFocus ? measurePreparedFocusView(world, preparedFocus, optics.focalPixels) : measureView({
+    const value = extendedSubject ? measureExtendedSubjectView(world, extendedSubject, optics.focalPixels) : measureView({
       eyeM: [world.pose.positionM[0] - navigation.frame.originM[0], world.pose.positionM[1] - navigation.frame.originM[1], world.pose.positionM[2] - navigation.frame.originM[2]],
       radiusM: navigation.frame.bodyRadiusM, rotation: cssCameraAxesFromOrientation(world.pose.orientationXyzw),
       view: surfaceMapViewport(scene, optics), focalPixels: optics.focalPixels, axes: surface?.axes, mapLeftEdgeLongitudeDeg: surface?.mapLeftEdgeLongitudeDeg,
     });
-    const distance = viewDistance(world, navigation.frame, overviewScope, undefined, preparedFocus);
+    const distance = viewDistance(world, navigation.frame, overviewScope, undefined, extendedSubject);
     write(altitude, formatViewDistance(distance.meters));
     if (distanceLabel) write(distanceLabel, distance.label);
     if (distanceGroup && distanceGroup.title !== distance.title) distanceGroup.title = distance.title;
@@ -129,7 +129,7 @@ export function createViewReadout({ drawer, documentTarget, windowTarget, surfac
       for (const map of maps) configs.set(map, parseSurfaceMapConfig(map.dataset.surfaceMinimap));
       refresh();
     },
-    setPreparedFocus(record) { preparedFocus = record; refresh(); },
+    setExtendedSubject(record) { extendedSubject = record; refresh(); },
     setOverviewScope(scope) { overviewScope = scope; refresh(); },
     setCamera(next) { if (camera === next) return; unsubscribe?.(); camera = next; unsubscribe = next?.navigation?.subscribe(() => schedule()) ?? null; refresh(); },
     setPlaybackState(state) {
diff --git a/src/objects/fornax-cluster-members/README.md b/src/objects/fornax-cluster-members/README.md
new file mode 100644
index 00000000000..b600f761b1d
--- /dev/null
+++ b/src/objects/fornax-cluster-members/README.md
@@ -0,0 +1,22 @@
+# Fornax Cluster members
+
+The Fornax Cluster's member galaxies that the [Nearby Universe](../nearby-universe/README.md) field does not draw, one dot each, drawn while the cluster is selected. With the field's own 51 Fornax galaxies, about 250 of the cluster's galaxies show when you fly there. The cluster's centre, aperture and card come from the [galaxy cluster catalogue](../galaxy-clusters/README.md), whose Fornax row links here.
+
+## Sources
+
+| Source | Measurement used |
+| --- | --- |
+| [Fornax Cluster Catalog, Ferguson (1989)](https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/180) | Table p2tbl2: B1950 position, membership status, morphological type and total blue magnitude of the 255 definite members. |
+| [Cosmicflows-4, Tully et al. (2023)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94) | Fornax's group distance (table 3, DMzp of group 13418: 31.468 mag, 19.7 Mpc), through the Nearby Universe's tracked table. |
+| [Kinney et al. (1996)](https://doi.org/10.1086/177583) | The type templates the Nearby Universe colours its galaxies with. |
+
+## Processing
+
+1. [`members.mts`](../../../packages/bake/authoring/fornax-cluster/members.mts) converts the B1950 positions to J2000 ICRS with Astropy's FK4 to ICRS transformation and keeps the 202 definite members more than 10 arcsec from every Cosmicflows-4 galaxy; the other 53 are in the field already. It reads each one's RC3 stage from its type (E and dE −5, S0 and dS0 −2, Sa 1, Sb 3, Sc 5, Sd 7, Sm 9, Im and BCD 10); the 22 whose type the catalogue leaves open between two classes have none.
+2. `packages/bake/cli/prepare-catalogue-points.mts` places every member at Fornax's group distance, spread in depth as widely as the members spread across the sky, and colours and tones it by its total blue magnitude as the field does ([recipe](source/dots/points.json)): 202 dots, 3 KB.
+
+## Known problems
+
+- A member's depth is assumed, not measured.
+- The catalogue covers the central 3.5° of the cluster.
+- The blue magnitudes are not corrected for Galactic extinction; a galaxy without a type is white.
diff --git a/src/objects/fornax-cluster-members/inventory.json b/src/objects/fornax-cluster-members/inventory.json
new file mode 100644
index 00000000000..58de9154aae
--- /dev/null
+++ b/src/objects/fornax-cluster-members/inventory.json
@@ -0,0 +1,11 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "prepared",
+      "filename": "dots.bin",
+      "bytes": 3581,
+      "sha256": "253521ad89bd018222af8496f441177493677b77948290bb04dd922aea42f67d"
+    }
+  ]
+}
diff --git a/src/objects/fornax-cluster-members/object.json b/src/objects/fornax-cluster-members/object.json
new file mode 100644
index 00000000000..c2e98cec137
--- /dev/null
+++ b/src/objects/fornax-cluster-members/object.json
@@ -0,0 +1,15 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "fornax-cluster-members",
+  "type": "catalogue-point-bank",
+  "properties": {
+    "preparation": {
+      "source": "source/dots/points.json"
+    },
+    "host": "fornax-cluster"
+  },
+  "prepared": {
+    "format": "cssearth-catalogue-points-bin@1",
+    "url": "prepared/dots.bin"
+  }
+}
diff --git a/src/objects/fornax-cluster/source/dots/fcc-members.csv.gz b/src/objects/fornax-cluster-members/source/dots/fcc-members.csv.gz
similarity index 100%
rename from src/objects/fornax-cluster/source/dots/fcc-members.csv.gz
rename to src/objects/fornax-cluster-members/source/dots/fcc-members.csv.gz
diff --git a/src/objects/fornax-cluster/source/dots/points.json b/src/objects/fornax-cluster-members/source/dots/points.json
similarity index 100%
rename from src/objects/fornax-cluster/source/dots/points.json
rename to src/objects/fornax-cluster-members/source/dots/points.json
diff --git a/src/objects/fornax-cluster-members/source/manifest.json b/src/objects/fornax-cluster-members/source/manifest.json
new file mode 100644
index 00000000000..106910c8076
--- /dev/null
+++ b/src/objects/fornax-cluster-members/source/manifest.json
@@ -0,0 +1,173 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "members",
+      "path": "src/objects/fornax-cluster-members/source/dots/fcc-members.csv.gz",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/VII/180/p2tbl2.dat.gz",
+      "sourceUrl": "https://cdsarc.cds.unistra.fr/ftp/VII/180/p2tbl2.dat.gz",
+      "title": "Fornax Cluster members from the Fornax Cluster Catalog that Cosmicflows-4 does not hold",
+      "credit": "Ferguson (1989), AJ 98, 367; CDS VII/180",
+      "acquisition": "Written 2026-09-30 by packages/bake/authoring/fornax-cluster/members.mts from the CDS table (the origin), with each member's Cosmicflows-4 group distance from the Nearby Universe's tracked table.",
+      "generator": "packages/bake/authoring/fornax-cluster/members.mts",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "ferguson-1989-fcc",
+            "role": "material",
+            "evidence": "src/objects/fornax-cluster-members/source/dots/points.json#/table"
+          }
+        ]
+      },
+      "dependencies": [
+        "cosmicflows-4-groups"
+      ],
+      "license": "Original catalogue terms apply; cite the authors and CDS/VizieR."
+    },
+    {
+      "id": "cosmicflows-4-groups",
+      "path": "src/objects/nearby-universe/source/galaxies/cf4-hyperleda.csv.gz",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/944/94/table3.dat.gz",
+      "sourceUrl": "https://doi.org/10.3847/1538-4357/ac94d8",
+      "title": "Cosmicflows-4 group distances, as joined into the Nearby Universe's tracked galaxy table",
+      "credit": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94, distributed by CDS/VizieR",
+      "acquisition": "Read from the Nearby Universe's tracked table, whose G1PGC and GDMzp columns packages/bake/authoring/nearby-universe/cf4-groups.mts joined from CDS tables 2 and 3.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "cosmicflows-4",
+            "role": "method",
+            "evidence": "src/objects/fornax-cluster-members/source/dots/points.json#/table/groupDistance"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "Original catalogue terms apply; cite Tully et al. (2023) and CDS/VizieR."
+    },
+    {
+      "id": "kc96-elliptical",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/elliptical_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/elliptical_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti elliptical template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/fornax-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    },
+    {
+      "id": "kc96-s0",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/s0_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/s0_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti s0 template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/fornax-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    },
+    {
+      "id": "kc96-sa",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/sa_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sa_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti sa template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/fornax-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    },
+    {
+      "id": "kc96-sb",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/sb_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sb_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti sb template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/fornax-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    },
+    {
+      "id": "kc96-sc",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/sc_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sc_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti sc template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/fornax-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    }
+  ],
+  "documents": [
+    {
+      "path": "src/objects/fornax-cluster-members/source/dots/points.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "path": "src/objects/fornax-cluster-members/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/fornax-cluster/source/presentation.json b/src/objects/fornax-cluster-members/source/presentation.json
similarity index 100%
rename from src/objects/fornax-cluster/source/presentation.json
rename to src/objects/fornax-cluster-members/source/presentation.json
diff --git a/src/objects/fornax-cluster/README.md b/src/objects/fornax-cluster/README.md
index b600f761b1d..9ac8aaa880e 100644
--- a/src/objects/fornax-cluster/README.md
+++ b/src/objects/fornax-cluster/README.md
@@ -1,22 +1,20 @@
-# Fornax Cluster members
+# Fornax Cluster
 
-The Fornax Cluster's member galaxies that the [Nearby Universe](../nearby-universe/README.md) field does not draw, one dot each, drawn while the cluster is selected. With the field's own 51 Fornax galaxies, about 250 of the cluster's galaxies show when you fly there. The cluster's centre, aperture and card come from the [galaxy cluster catalogue](../galaxy-clusters/README.md), whose Fornax row links here.
+The Fornax Cluster as an object of the world: its place, its card and its list marker. It has no surface. Its one dataset shows the [Fornax Cluster members](../fornax-cluster-members/README.md) bank, whose README holds the member catalogue's sources, processing, evidence and known problems.
 
 ## Sources
 
 | Source | Measurement used |
 | --- | --- |
-| [Fornax Cluster Catalog, Ferguson (1989)](https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/180) | Table p2tbl2: B1950 position, membership status, morphological type and total blue magnitude of the 255 definite members. |
-| [Cosmicflows-4, Tully et al. (2023)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94) | Fornax's group distance (table 3, DMzp of group 13418: 31.468 mag, 19.7 Mpc), through the Nearby Universe's tracked table. |
-| [Kinney et al. (1996)](https://doi.org/10.1086/177583) | The type templates the Nearby Universe colours its galaxies with. |
+| [MCXC-II, Sadibekova et al. (2024)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/688/A187) | The cluster's J2000 position, redshift and R500 radius, through the [galaxy cluster catalogue](../galaxy-clusters/README.md). |
+| [Cosmicflows-4, Tully et al. (2023)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94) | The group distance the cluster is placed at (table 3, DMzp of group 13418: 19.7 Mpc). |
 
 ## Processing
 
-1. [`members.mts`](../../../packages/bake/authoring/fornax-cluster/members.mts) converts the B1950 positions to J2000 ICRS with Astropy's FK4 to ICRS transformation and keeps the 202 definite members more than 10 arcsec from every Cosmicflows-4 galaxy; the other 53 are in the field already. It reads each one's RC3 stage from its type (E and dE −5, S0 and dS0 −2, Sa 1, Sb 3, Sc 5, Sd 7, Sm 9, Im and BCD 10); the 22 whose type the catalogue leaves open between two classes have none.
-2. `packages/bake/cli/prepare-catalogue-points.mts` places every member at Fornax's group distance, spread in depth as widely as the members spread across the sky, and colours and tones it by its total blue magnitude as the field does ([recipe](source/dots/points.json)): 202 dots, 3 KB.
+1. The [astronomy record](../../../packages/astronomy/data/bodies/fornax-cluster.json) places the cluster from those two catalogues.
+2. `pnpm prepare:objects --object=fornax-cluster` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the page frames the cluster at 0.62 Mpc, a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+3. `node site/build/prepare/companion-context.mts fornax-cluster` draws the list marker from the member dots.
 
 ## Known problems
 
-- A member's depth is assumed, not measured.
-- The catalogue covers the central 3.5° of the cluster.
-- The blue magnitudes are not corrected for Galactic extinction; a galaxy without a type is white.
+- The framing radius is a presentation value, not a measured extent of the cluster.
diff --git a/src/objects/fornax-cluster/inventory.json b/src/objects/fornax-cluster/inventory.json
index 58de9154aae..9213fc80fde 100644
--- a/src/objects/fornax-cluster/inventory.json
+++ b/src/objects/fornax-cluster/inventory.json
@@ -1,11 +1,53 @@
 {
   "schema": "cssearth-inventory@1",
   "assets": [
+    {
+      "location": "public",
+      "filename": "fornax-cluster-dataset-members.webp",
+      "bytes": 428,
+      "sha256": "d164249e8fa2cc0f4f33df1488093a1fec2fee5867c0bd9054c941f0f4aa6ad5"
+    },
+    {
+      "location": "prepared",
+      "filename": "content.json",
+      "bytes": 2996,
+      "sha256": "259c5773de63f94cc5c0446ac74f101f40f9fffa3107743fccbef19f57cdc863"
+    },
+    {
+      "location": "prepared",
+      "filename": "controls.json",
+      "bytes": 483,
+      "sha256": "3d4bd17294c774793da4125a489366fa1e5218a296a04ff045053df6f7382bec"
+    },
+    {
+      "location": "prepared",
+      "filename": "datasets.json",
+      "bytes": 599,
+      "sha256": "a31c2f8ebcd6a7890d0a1ffc31220ffe576603fd185f5c46cb232a5194458790"
+    },
+    {
+      "location": "prepared",
+      "filename": "runtime.json",
+      "bytes": 4643,
+      "sha256": "5f93f8824838cd6583ead493ec0760a91e65c2e1f7aacf5b25f9ff6254a49950"
+    },
+    {
+      "location": "prepared",
+      "filename": "scene.json",
+      "bytes": 3902,
+      "sha256": "0940583bde2747a66ad76c279321c133cb0d42fbbf2fa002b5a82693b0335f79"
+    },
+    {
+      "location": "prepared",
+      "filename": "text.json",
+      "bytes": 1691,
+      "sha256": "3b6de8ed5f1b4b059513539538f95858fec85fb6b242df17700e3f792618429b"
+    },
     {
       "location": "prepared",
-      "filename": "dots.bin",
-      "bytes": 3581,
-      "sha256": "253521ad89bd018222af8496f441177493677b77948290bb04dd922aea42f67d"
+      "filename": "world-navigation.json",
+      "bytes": 653,
+      "sha256": "6bea3d12e3a9424792f75281081dbdc4693cb8a75c9df0e12b3e20e46f2a9e45"
     }
   ]
 }
diff --git a/src/objects/fornax-cluster/object.json b/src/objects/fornax-cluster/object.json
index 8e5dc306fc7..2287752fb15 100644
--- a/src/objects/fornax-cluster/object.json
+++ b/src/objects/fornax-cluster/object.json
@@ -1,14 +1,97 @@
 {
   "schema": "cssearth-object@2",
   "id": "fornax-cluster",
-  "type": "catalogue-point-bank",
+  "type": "layered-body",
   "properties": {
     "preparation": {
-      "source": "source/dots/points.json"
+      "schema": "cssearth-object-preparation@1",
+      "label": "Fornax Cluster",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 19120220621572740000
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Fornax Cluster",
+      "systemName": "Galaxy clusters",
+      "classification": "galaxy-cluster",
+      "color": "#9a9a9a",
+      "distanceAu": 4055320034000,
+      "description": "A cluster of galaxies 19.7 million parsecs away.",
+      "aliases": [
+        "RXCJ0338.4-3526",
+        "FORNAX",
+        "MCXC J0338.4-3526"
+      ],
+      "order": 5136,
+      "context": {}
+    },
+    "worldFrame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        2.8617512664442404e+23,
+        4.029302349710151e+23,
+        -3.5184679460123856e+23
+      ],
+      "presentationToReference": [
+        0.7798248547008383,
+        0,
+        0.6259977603720448,
+        0.5743417160368334,
+        0.3977771559319137,
+        -0.7154753157437252,
+        0.24900760874053943,
+        -0.9174820620691818,
+        -0.3101965128279173
+      ],
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 61678131037331420000,
+      "bodyRadiusM": 1.912022062157274e+22
     }
   },
   "prepared": {
-    "format": "cssearth-catalogue-points-bin@1",
-    "url": "prepared/dots.bin"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/fornax-cluster/source/content/object.json b/src/objects/fornax-cluster/source/content/object.json
new file mode 100644
index 00000000000..2ae56135266
--- /dev/null
+++ b/src/objects/fornax-cluster/source/content/object.json
@@ -0,0 +1,119 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "fornax-cluster",
+  "displayName": "Fornax Cluster",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Group distance",
+        "value": "19.66 Mpc",
+        "source": {
+          "catalogueId": "cosmicflows-4",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94",
+          "label": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 54.62\u00b0, Dec -35.45\u00b0",
+        "source": {
+          "catalogueId": "mcxc-ii-2024",
+          "url": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz",
+          "label": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "classification",
+        "label": "Classification",
+        "value": "X-ray selected galaxy cluster",
+        "source": {
+          "catalogueId": "mcxc-ii-2024",
+          "url": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz",
+          "label": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "redshift",
+        "label": "Redshift",
+        "value": "0.0051",
+        "source": {
+          "catalogueId": "publication-2004a-a-425-367b",
+          "url": "https://ui.adsabs.harvard.edu/abs/2004A&A...425..367B",
+          "label": "Redshift reference 2004A&A...425..367B, transcribed from MCXC-II.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "aperture",
+        "label": "R500 radius",
+        "value": "0.411 Mpc",
+        "source": {
+          "catalogueId": "mcxc-ii-2024",
+          "url": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz",
+          "label": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "members",
+    "controls": [
+      {
+        "id": "members",
+        "label": "Member galaxies",
+        "thumbnail": "fornax-cluster-dataset-members.webp",
+        "volume": {
+          "objectId": "fornax-cluster-members",
+          "datasetId": "members",
+          "surface": "members"
+        },
+        "source": {
+          "id": "fornax-cluster-members",
+          "path": "../../fornax-cluster-members/source/manifest.json",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/180"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table",
+      "href": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+      "href": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Redshift reference 2004A&A...425..367B, transcribed from MCXC-II.",
+      "href": "https://ui.adsabs.harvard.edu/abs/2004A&A...425..367B"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94",
+      "credit": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table"
+    }
+  }
+}
diff --git a/src/objects/fornax-cluster/source/manifest.json b/src/objects/fornax-cluster/source/manifest.json
index 620afc974db..bce772334ab 100644
--- a/src/objects/fornax-cluster/source/manifest.json
+++ b/src/objects/fornax-cluster/source/manifest.json
@@ -1,173 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "members",
-      "path": "src/objects/fornax-cluster/source/dots/fcc-members.csv.gz",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://cdsarc.cds.unistra.fr/ftp/VII/180/p2tbl2.dat.gz",
-      "sourceUrl": "https://cdsarc.cds.unistra.fr/ftp/VII/180/p2tbl2.dat.gz",
-      "title": "Fornax Cluster members from the Fornax Cluster Catalog that Cosmicflows-4 does not hold",
-      "credit": "Ferguson (1989), AJ 98, 367; CDS VII/180",
-      "acquisition": "Written 2026-09-30 by packages/bake/authoring/fornax-cluster/members.mts from the CDS table (the origin), with each member's Cosmicflows-4 group distance from the Nearby Universe's tracked table.",
-      "generator": "packages/bake/authoring/fornax-cluster/members.mts",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "ferguson-1989-fcc",
-            "role": "material",
-            "evidence": "src/objects/fornax-cluster/source/dots/points.json#/table"
-          }
-        ]
-      },
-      "dependencies": [
-        "cosmicflows-4-groups"
+      "credit": "The member dots of the Fornax Cluster members bank as they lie on the sky; drawn by site/build/prepare/companion-context.mts",
+      "license": "Project-authored display derivative.",
+      "consumers": [
+        "navigation"
       ],
-      "license": "Original catalogue terms apply; cite the authors and CDS/VizieR."
-    },
-    {
-      "id": "cosmicflows-4-groups",
-      "path": "src/objects/nearby-universe/source/galaxies/cf4-hyperleda.csv.gz",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/944/94/table3.dat.gz",
-      "sourceUrl": "https://doi.org/10.3847/1538-4357/ac94d8",
-      "title": "Cosmicflows-4 group distances, as joined into the Nearby Universe's tracked galaxy table",
-      "credit": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94, distributed by CDS/VizieR",
-      "acquisition": "Read from the Nearby Universe's tracked table, whose G1PGC and GDMzp columns packages/bake/authoring/nearby-universe/cf4-groups.mts joined from CDS tables 2 and 3.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "cosmicflows-4",
-            "role": "method",
-            "evidence": "src/objects/fornax-cluster/source/dots/points.json#/table/groupDistance"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "Original catalogue terms apply; cite Tully et al. (2023) and CDS/VizieR."
-    },
-    {
-      "id": "kc96-elliptical",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/elliptical_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/elliptical_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti elliptical template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/fornax-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
-    },
-    {
-      "id": "kc96-s0",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/s0_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/s0_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti s0 template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/fornax-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
-    },
-    {
-      "id": "kc96-sa",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/sa_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sa_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti sa template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/fornax-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
-    },
-    {
-      "id": "kc96-sb",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/sb_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sb_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti sb template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/fornax-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
-    },
-    {
-      "id": "kc96-sc",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/sc_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sc_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti sc template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/fornax-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/fornax-cluster-members/source/manifest.json)."
+      }
     }
   ],
   "documents": [
     {
-      "path": "src/objects/fornax-cluster/source/dots/points.json",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "path": "src/objects/fornax-cluster/source/presentation.json",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored framing: the radius the page frames the cluster at, a presentation value."
       }
+    },
+    {
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/fornax-cluster/source/preparation/navigation.json b/src/objects/fornax-cluster/source/preparation/navigation.json
new file mode 100644
index 00000000000..cad7b8359c7
--- /dev/null
+++ b/src/objects/fornax-cluster/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "fornax-cluster",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/fornax-cluster/source/presentation/context.png b/src/objects/fornax-cluster/source/presentation/context.png
new file mode 100644
index 00000000000..47d57750672
Binary files /dev/null and b/src/objects/fornax-cluster/source/presentation/context.png differ
diff --git a/src/objects/fornax-cluster/source/presentation/solar-system.json b/src/objects/fornax-cluster/source/presentation/solar-system.json
new file mode 100644
index 00000000000..bc54a0303aa
--- /dev/null
+++ b/src/objects/fornax-cluster/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "fornax-cluster",
+  "displayName": "Fornax Cluster",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 1.912022062157274e+19,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/fornax-cluster/text.json b/src/objects/fornax-cluster/text.json
new file mode 100644
index 00000000000..dfd83481eea
--- /dev/null
+++ b/src/objects/fornax-cluster/text.json
@@ -0,0 +1,50 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "fornax-cluster",
+  "card": {
+    "text": "A cluster of galaxies 19.7 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "cosmicflows-4",
+        "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94",
+        "label": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table",
+        "checked": "2026-10-01",
+        "locator": "distance: 19.66 Mpc"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "An X-ray selected cluster of galaxies at redshift 0.0051, with an R500 radius of 0.411 million parsecs.",
+    "sources": [
+      {
+        "catalogueId": "mcxc-ii-2024",
+        "url": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz",
+        "label": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+        "checked": "2026-10-01",
+        "locator": "Fornax row: z 0.0051, R500 0.411 Mpc"
+      }
+    ]
+  },
+  "datasets": {
+    "members": {
+      "title": "Cosmicflows-4 group members",
+      "summary": "One dot per member galaxy the Nearby Universe field does not draw. A member's depth is assumed, not measured.",
+      "sources": [
+        {
+          "catalogueId": "ferguson-1989-fcc",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/VII/180",
+          "label": "Ferguson (1989), Fornax Cluster Catalog, AJ 98, 367; CDS VII/180, table p2tbl2",
+          "checked": "2026-10-01",
+          "locator": "table p2tbl2, definite members"
+        },
+        {
+          "catalogueId": "cosmicflows-4",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94",
+          "label": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, table 3 (group distance modulus, DMzp)",
+          "checked": "2026-10-01",
+          "locator": "group 13418: DMzp 31.468 mag"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/helix-volume/README.md b/src/objects/helix-volume/README.md
new file mode 100644
index 00000000000..b19fa51708f
--- /dev/null
+++ b/src/objects/helix-volume/README.md
@@ -0,0 +1,43 @@
+# Helix Nebula
+
+Three ESO datasets share a conditional emission field. **ESO WFI optical is the default.** Molecular velocities constrain a coarse scaffold; unmeasured front/back allocation and outer-halo depth remain assumptions.
+
+## Sources
+
+| Source / dataset | Selected image and coverage |
+| --- | --- |
+| [ESO WFI, eso0907a](https://www.eso.org/public/images/eso0907a/) | B/V/R display; 7059 × 6535 pixels, 28.02′ × 25.94′. |
+| [ESO VISTA, eso1205a](https://www.eso.org/public/images/eso1205a/) | Y/J/K display; 6592² pixels, 37.51′ square. |
+| [ESO 3.6 m, helix](https://www.eso.org/public/images/helix/) | Wider 6850 × 4759-pixel image, 48.82′ × 33.92′; filters not listed by the publisher. |
+| [Molecular component record](source/evidence/helix/kinematics-hco.json) | Zeigler et al. HCO+ measurements condition coarse depth where supported; they do not recover every knot. |
+
+All three photographs are display composites with unequal footprints and band responses. The adopted central-star scale is **216 −12/+14 pc**, from [Benedict et al. (2009), abstract, NGC 7293 distance](https://arxiv.org/abs/0909.4281).
+
+The [stellar field](source/stellar-field.json) contains 6627 Gaia candidates in an authored 50 pc sphere, G < 16. The delivery uses 1466 parallax-informed points plus **34 compact image anchors**: 28 WFI, five VISTA and one wider-ESO core, including the central star. These anchors deliberately retain conditional cloud depths and original source appearance across datasets; catalogue matches do **not** convert those depths into measured distances. One VISTA edge core has image evidence but no Gaia association.
+
+Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
+
+## Evidence
+
+- Final app inspection records front/oblique views across all three datasets after restoring the wider-image cores. Report context documents incomplete historical capture metadata.
+- The final app report identifies cloud result `2794e4cc5c3a…`, and the [object descriptor](object.json) pins its installed bank; the field’s image-anchor receipt separates compact-source evidence, image-component offsets and Gaia angular associations.
+- [Historical registration](../../../labs/nebula/models/helix/README.md#aligned-observations-and-native-star-removal) records held-out RMS of 0.34″ for VISTA and 1.10″ for the wider ESO field relative to WFI. This verifies overlap registration, not absolute astrometry or stellar membership. No new cold replay or material acceptance is claimed.
+
+## Known problems
+
+- Residual bright stellar halos remain in the cloud. Retained cores restore visual anchors; they do not make the contaminated diffuse material scientifically star-free.
+- The first 28-core WFI-only fix missed upper halos outside that photograph. The current three-image union resolves that coverage omission; it does not justify arbitrary points on nebular knots.
+- Fine knots, outer-halo completeness, VISTA color streaks and unsupported depth remain unresolved. Earlier one-axis and disk/ring models failed visual inspection.
+
+<details>
+<summary>Methods and historical comparisons</summary>
+
+The [fixed lab account](../../../labs/nebula/models/helix/README.md) preserves the single-axis, disk/ring, tuned-shape and compiler trials as distinct results. The [joint-fit method](../../../labs/nebula/docs/joint-fit.md) records molecular sample-count, beam and front/back limitations. Wider Hubble/CTIO, CFHT and photographer candidates remain documented in the [investigation ledger](investigations.json). Preparation belongs in the [shared guide](../../../docs/nebulae/README.md).
+
+</details>
+
+## Compact delivery inputs
+
+The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
+
+Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
diff --git a/src/objects/helix-volume/inventory.json b/src/objects/helix-volume/inventory.json
new file mode 100644
index 00000000000..4d8ead90164
--- /dev/null
+++ b/src/objects/helix-volume/inventory.json
@@ -0,0 +1,569 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/eso-vista.webp",
+      "bytes": 39332,
+      "sha256": "8b11ba5db3ee28fe78a373ab928c81712848305cb52115605853ca7809673ca5"
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+      "bytes": 9410,
+      "sha256": "f50a1aa86e8529685ece94d6d29958a97dccc944816c21aa04c9e7328f90ace3"
+    },
+    {
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+      "filename": "datasets/eso-wide.webp",
+      "bytes": 8158,
+      "sha256": "bc29c6010cf300338808114365d0ae4b7142e3fd909e1b073e525f9362d65a54"
+    },
+    {
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+      "bytes": 1490233,
+      "sha256": "f544b633704331cc3ddfb4937ceac18a58a210155ae1abdab8cf37dc7b82ded3"
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diff --git a/src/objects/helix/investigations.json b/src/objects/helix-volume/investigations.json
similarity index 96%
rename from src/objects/helix/investigations.json
rename to src/objects/helix-volume/investigations.json
index b0f90085f72..4b52c80a501 100644
--- a/src/objects/helix/investigations.json
+++ b/src/objects/helix-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "helix",
+  "objectId": "helix-volume",
   "entries": [
     {
       "id": "dataset-eso-wfi",
@@ -8,7 +8,7 @@
       "status": "included",
       "finding": "Default B/V/R photograph, 7059 by 6535 pixels over 28.02 by 25.94 arcmin; source-relative astrometric anchor. Its finite footprint misses some bright outer halos and cannot alone provide all compact image anchors.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/observations.json"
       ]
@@ -19,7 +19,7 @@
       "status": "included",
       "finding": "Y/J/K photograph, 6592² pixels over 37.51 arcmin square; 794 held-out stars give 0.34 arcsec RMS relative to WFI. Outer color and five retained compact cores extend beyond WFI; overlap astrometry is not absolute calibration or membership.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/observations.json"
       ]
@@ -30,7 +30,7 @@
       "status": "included",
       "finding": "Wider ESO 3.6 m photograph, 6850 by 4759 pixels over 48.82 by 33.92 arcmin; filters unspecified. The 229 held-out stars give 1.10 arcsec RMS relative to WFI. Softer structure/artifacts remain; one retained compact core comes from this source.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/observations.json"
       ]
@@ -41,8 +41,8 @@
       "status": "included",
       "finding": "6627 Gaia candidates in an authored 50 pc sphere, G < 16; 1466 Gaia points share a total 1500-point budget with 34 conditional image anchors. Actual catalogue source IDs, median distances and uncertainty intervals are retained. Sphere, quality cuts, budget, brightness response and fade are display selections, not a membership survey; Cardiel BP-RP display color uses a neutral fallback outside its valid range.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/stellar-field.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/delivery.json",
         "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
         "https://arxiv.org/abs/2012.05220",
         "https://arxiv.org/abs/2107.08734"
@@ -54,7 +54,7 @@
       "status": "included",
       "finding": "The adopted 216 -12/+14 pc scale follows the published central-star result, with an explicitly chosen ICRS centre. It is not the distance of every surrounding star or emitting knot.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/nebula.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/nebula.json",
         "https://arxiv.org/abs/0909.4281"
       ]
     },
@@ -75,7 +75,7 @@
       "status": "included",
       "finding": "28 WFI, five VISTA and one wider-ESO core restore visual anchors, including the central star. Canonical source photometry remains visible outside an individual dataset footprint. Angular Gaia matches and component offsets are separately recorded; depths stay conditional, and one VISTA edge core has no Gaia match.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/stellar-field.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/compiler.json"
       ]
     },
@@ -85,7 +85,7 @@
       "status": "excluded",
       "finding": "The initial correction placed selected cores accurately but missed upper bright halos outside the WFI star footprint. Increasing random top-N points could not repair that source-coverage failure; the three-image union supersedes it.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/stellar-field.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/compiler.json"
       ],
       "revisitWhen": "Reopen only if the wider-source compact detections are disproved by source evidence; do not replace them with unrelated offset points."
@@ -181,7 +181,7 @@
       "finding": "Bright stellar halos survive NOX and some nebular knots enter the residual. Compact anchors improve the visible cores but leave that cloud contamination and the uncertain outer depth intact; registration and exact source accounting are not star-removal or material acceptance.",
       "evidence": [
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/helix/README.md",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix/source/stellar-field.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/helix-volume/source/stellar-field.json"
       ],
       "revisitWhen": "Audit source separation and finite emission with positive source evidence, retaining real knots and verified compact anchors, then inspect the same spectral front/side views."
     }
diff --git a/src/objects/helix-volume/object.json b/src/objects/helix-volume/object.json
new file mode 100644
index 00000000000..53fa79df5dd
--- /dev/null
+++ b/src/objects/helix-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "helix-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        5753513735748707000,
+        -2384067544684067000,
+        -2373834772056189000
+      ],
+      "localToReferenceXyzw": [
+        0.6849222152530097,
+        0.45687881312187983,
+        0.31496089303866553,
+        0.47216834395111507
+      ],
+      "metersPerUnit": 32313140071200,
+      "boundsUnits": {
+        "min": [
+          -2280.280787514437,
+          -2096.5462776359145,
+          -694.7955367141913
+        ],
+        "max": [
+          2280.280787514437,
+          2096.5462776359145,
+          694.7955367141913
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/delivery.json"
+    },
+    "host": "helix"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/helix/source/bake-inputs.json.gz b/src/objects/helix-volume/source/bake-inputs.json.gz
similarity index 100%
rename from src/objects/helix/source/bake-inputs.json.gz
rename to src/objects/helix-volume/source/bake-inputs.json.gz
diff --git a/src/objects/helix/source/bake-inputs/references/01-compiler.json b/src/objects/helix-volume/source/bake-inputs/references/01-compiler.json
similarity index 98%
rename from src/objects/helix/source/bake-inputs/references/01-compiler.json
rename to src/objects/helix-volume/source/bake-inputs/references/01-compiler.json
index bfafeeaa478..47d8ec30db1 100644
--- a/src/objects/helix/source/bake-inputs/references/01-compiler.json
+++ b/src/objects/helix-volume/source/bake-inputs/references/01-compiler.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-compiler@1",
-  "id": "helix",
+  "id": "helix-volume",
   "label": "Helix",
   "observationRecipe": "labs/nebula/models/helix/observations.json",
   "observationCatalogue": ".local/nebula-lab/observations/helix/observations.json",
diff --git a/src/objects/helix/source/bake-inputs/references/02-observations.json b/src/objects/helix-volume/source/bake-inputs/references/02-observations.json
similarity index 98%
rename from src/objects/helix/source/bake-inputs/references/02-observations.json
rename to src/objects/helix-volume/source/bake-inputs/references/02-observations.json
index f01daed9d22..d653931ac36 100644
--- a/src/objects/helix/source/bake-inputs/references/02-observations.json
+++ b/src/objects/helix-volume/source/bake-inputs/references/02-observations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-observation-recipe@1",
-  "id": "helix",
+  "id": "helix-volume",
   "referenceId": "eso-wfi",
   "frame": {
     "width": 1024,
@@ -93,8 +93,8 @@
           -20.837171
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         "scaleDeg": [
-          -0.00006615929,
-          0.00006615929
+          -6.615929e-05,
+          6.615929e-05
         ],
         "rotationDeg": 0.12510794634
       },
diff --git a/src/objects/helix/source/bake-inputs/references/03-observation-structures.json b/src/objects/helix-volume/source/bake-inputs/references/03-observation-structures.json
similarity index 100%
rename from src/objects/helix/source/bake-inputs/references/03-observation-structures.json
rename to src/objects/helix-volume/source/bake-inputs/references/03-observation-structures.json
diff --git a/src/objects/helix/source/bake-inputs/references/04-joint-fit.json b/src/objects/helix-volume/source/bake-inputs/references/04-joint-fit.json
similarity index 100%
rename from src/objects/helix/source/bake-inputs/references/04-joint-fit.json
rename to src/objects/helix-volume/source/bake-inputs/references/04-joint-fit.json
diff --git a/src/objects/helix/source/delivery.json b/src/objects/helix-volume/source/delivery.json
similarity index 85%
rename from src/objects/helix/source/delivery.json
rename to src/objects/helix-volume/source/delivery.json
index 8635b2a4299..62ffdcb71c0 100644
--- a/src/objects/helix/source/delivery.json
+++ b/src/objects/helix-volume/source/delivery.json
@@ -1,9 +1,9 @@
 {
   "schema": "cssearth-nebula-delivery@2",
-  "id": "helix",
+  "id": "helix-volume",
   "method": "compiler",
   "request": {
-    "path": "src/objects/helix/source/request.json"
+    "path": "src/objects/helix-volume/source/request.json"
   },
   "inputPins": [
     {
@@ -34,10 +34,10 @@
   "framingRadiusUnits": 1500,
   "acceptedLabResult": "helix",
   "fieldStars": {
-    "path": "src/objects/helix/source/stellar-field.json"
+    "path": "src/objects/helix-volume/source/stellar-field.json"
   },
   "compactInputs": {
-    "path": "src/objects/helix/source/bake-inputs.json.gz"
+    "path": "src/objects/helix-volume/source/bake-inputs.json.gz"
   },
   "compactMethod": "compiler"
 }
diff --git a/src/objects/helix/source/evidence/helix/kinematics-hco.json b/src/objects/helix-volume/source/evidence/helix/kinematics-hco.json
similarity index 100%
rename from src/objects/helix/source/evidence/helix/kinematics-hco.json
rename to src/objects/helix-volume/source/evidence/helix/kinematics-hco.json
diff --git a/src/objects/helix-volume/source/manifest.json b/src/objects/helix-volume/source/manifest.json
new file mode 100644
index 00000000000..a2be09951f5
--- /dev/null
+++ b/src/objects/helix-volume/source/manifest.json
@@ -0,0 +1,297 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "eso-vista",
+      "path": ".local/nebula-lab/observations/helix/sources/eso-vista.tif",
+      "origin": "https://www.eso.org/public/images/eso1205a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1205a/",
+      "title": "Helix · eso1205a",
+      "credit": "ESO/VISTA/J. Emerson. Acknowledgment: Cambridge Astronomical Survey Unit",
+      "displayCredit": "ESO/VISTA/J. Emerson. Acknowledgment: Cambridge Astronomical Survey Unit",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1205a",
+            "role": "material",
+            "evidence": "labs/nebula/models/helix/observations.json#/images/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso-vista",
+      "license": "ESO public-image terms; retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vista",
+            "evidence": "https://www.eso.org/public/images/eso1205a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "eso-wfi",
+      "path": ".local/nebula-lab/observations/helix/sources/eso-wfi.tif",
+      "origin": "https://www.eso.org/public/images/eso0907a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso0907a/",
+      "title": "Helix · eso0907a",
+      "credit": "ESO",
+      "displayCredit": "ESO",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso0907a",
+            "role": "material",
+            "evidence": "labs/nebula/models/helix/observations.json#/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso-wfi",
+      "license": "ESO public-image terms; retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "mpg-eso-2-2m",
+            "evidence": "https://www.eso.org/public/images/eso0907a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "eso-wide",
+      "path": ".local/nebula-lab/observations/helix/sources/eso-wide.tif",
+      "origin": "https://www.eso.org/public/images/helix/",
+      "sourceUrl": "https://www.eso.org/public/images/helix/",
+      "title": "Helix · helix",
+      "credit": "ESO",
+      "displayCredit": "ESO",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-helix",
+            "role": "material",
+            "evidence": "labs/nebula/models/helix/observations.json#/images/2"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso-wide",
+      "license": "ESO public-image terms; retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "eso-3-6m",
+            "evidence": "https://www.eso.org/public/images/helix/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "hco-components",
+      "path": ".local/nebula-lab/kinematics/helix/hco/table1.dat",
+      "origin": "https://doi.org/10.26093/cds/vizier.17780016",
+      "sourceUrl": "https://doi.org/10.26093/cds/vizier.17780016",
+      "title": "Helix HCO+ J=1–0 component fits",
+      "credit": "Zeigler, Zack, Woolf & Ziurys (2013); CDS/VizieR",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "cds-j-apj-778-16",
+            "role": "material",
+            "evidence": "labs/nebula/models/helix/kinematics-hco.json#/table"
+          },
+          {
+            "catalogueId": "zeigler-2013",
+            "role": "method",
+            "evidence": "labs/nebula/models/helix/kinematics-hco.json#/citation"
+          }
+        ]
+      },
+      "dependencies": [],
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "aro-12m-original",
+            "evidence": "https://doi.org/10.1088/0004-637X/778/1/16 — Zeigler et al. (2013) abstract: HCO+ J=1–0 at 89 GHz mapped with the Arizona Radio Observatory 12 m telescope; https://experts.arizona.edu/en/publications/the-helix-nebula-viewed-in-hcosupsup-large-scale-mapping-of-the-j/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "distance",
+      "path": "src/objects/helix-volume/source/delivery.json",
+      "origin": "https://arxiv.org/html/0909.4281",
+      "sourceUrl": "https://arxiv.org/html/0909.4281",
+      "title": "Helix adopted world placement",
+      "credit": "Benedict et al. (2009); cssEarth placement",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "benedict-2009",
+            "role": "reference",
+            "evidence": "src/objects/helix-volume/source/delivery.json: sky.distancePc = 216; adopted world placement"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "stellar-field",
+      "path": "src/objects/helix-volume/source/stellar-field.json",
+      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "title": "Helix Nebula surrounding Gaia DR3 stellar field",
+      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
+      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
+      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "gaia-dr3-gavo",
+            "role": "material",
+            "evidence": "src/objects/helix-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "bailer-jones-2021-distances",
+            "role": "method",
+            "evidence": "src/objects/helix-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "cardiel-2021-rgb",
+            "role": "method",
+            "evidence": "src/objects/helix-volume/source/stellar-field.json#/provenance"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "gaia",
+            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-1",
+      "path": "src/objects/helix-volume/source/delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/helix-volume/source/nebula.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-3",
+      "path": "src/objects/helix-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/helix-volume/source/request.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "retained-evidence-5",
+      "path": "src/objects/helix-volume/source/bake-inputs/references/01-compiler.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-6",
+      "path": "src/objects/helix-volume/source/bake-inputs/references/02-observations.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-7",
+      "path": "src/objects/helix-volume/source/bake-inputs/references/03-observation-structures.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-8",
+      "path": "src/objects/helix-volume/source/bake-inputs/references/04-joint-fit.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-9",
+      "path": "src/objects/helix-volume/source/evidence/helix/kinematics-hco.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-10",
+      "path": "src/objects/helix-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-11",
+      "path": "src/objects/helix-volume/source/replay-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
+      }
+    }
+  ],
+  "generatedIntermediates": [
+    {
+      "id": "compact-bake-inputs-json-gz",
+      "path": "src/objects/helix-volume/source/bake-inputs.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    }
+  ]
+}
diff --git a/src/objects/helix/source/nebula.json b/src/objects/helix-volume/source/nebula.json
similarity index 97%
rename from src/objects/helix/source/nebula.json
rename to src/objects/helix-volume/source/nebula.json
index b4c87cce424..0085cb43877 100644
--- a/src/objects/helix/source/nebula.json
+++ b/src/objects/helix-volume/source/nebula.json
@@ -56,7 +56,7 @@
         "sourceRef": "helix-registered-images"
       },
       "status": "confirmed",
-      "detailedObjectId": "helix"
+      "detailedObjectId": "helix-volume"
     }
   ]
 }
diff --git a/src/objects/helix/source/presentation.json b/src/objects/helix-volume/source/presentation.json
similarity index 87%
rename from src/objects/helix/source/presentation.json
rename to src/objects/helix-volume/source/presentation.json
index d39e77ee49f..4cb0b29e02d 100644
--- a/src/objects/helix/source/presentation.json
+++ b/src/objects/helix-volume/source/presentation.json
@@ -1,39 +1,39 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "helix",
+  "objectId": "helix-volume",
   "name": "Helix Nebula",
   "defaultDataset": "eso-wfi",
   "bank": {
-    "path": "src/objects/helix/prepared/datasets.json"
+    "path": "src/objects/helix-volume/prepared/datasets.json"
   },
   "recipes": [
     {
       "id": "recipe-1",
-      "path": "src/objects/helix/source/delivery.json"
+      "path": "src/objects/helix-volume/source/delivery.json"
     },
     {
       "id": "recipe-2",
-      "path": "src/objects/helix/source/request.json"
+      "path": "src/objects/helix-volume/source/request.json"
     },
     {
       "id": "recipe-3",
-      "path": "src/objects/helix/source/bake-inputs/references/01-compiler.json"
+      "path": "src/objects/helix-volume/source/bake-inputs/references/01-compiler.json"
     },
     {
       "id": "recipe-4",
-      "path": "src/objects/helix/source/bake-inputs/references/02-observations.json"
+      "path": "src/objects/helix-volume/source/bake-inputs/references/02-observations.json"
     },
     {
       "id": "recipe-5",
-      "path": "src/objects/helix/source/bake-inputs/references/03-observation-structures.json"
+      "path": "src/objects/helix-volume/source/bake-inputs/references/03-observation-structures.json"
     },
     {
       "id": "recipe-6",
-      "path": "src/objects/helix/source/bake-inputs/references/04-joint-fit.json"
+      "path": "src/objects/helix-volume/source/bake-inputs/references/04-joint-fit.json"
     },
     {
       "id": "molecular-evidence",
-      "path": "src/objects/helix/source/evidence/helix/kinematics-hco.json"
+      "path": "src/objects/helix-volume/source/evidence/helix/kinematics-hco.json"
     }
   ],
   "sharedInputs": [
diff --git a/src/objects/helix/source/provenance-references.json b/src/objects/helix-volume/source/provenance-references.json
similarity index 55%
rename from src/objects/helix/source/provenance-references.json
rename to src/objects/helix-volume/source/provenance-references.json
index 6ff98f8fd2a..bca67574729 100644
--- a/src/objects/helix/source/provenance-references.json
+++ b/src/objects/helix-volume/source/provenance-references.json
@@ -3,27 +3,27 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/helix/compiler.json",
-      "path": "src/objects/helix/source/bake-inputs/references/01-compiler.json",
+      "path": "src/objects/helix-volume/source/bake-inputs/references/01-compiler.json",
       "bytes": 1329
     },
     {
       "originalPath": "labs/nebula/models/helix/observations.json",
-      "path": "src/objects/helix/source/bake-inputs/references/02-observations.json",
+      "path": "src/objects/helix-volume/source/bake-inputs/references/02-observations.json",
       "bytes": 4470
     },
     {
       "originalPath": "labs/nebula/models/helix/observation-structures.json",
-      "path": "src/objects/helix/source/bake-inputs/references/03-observation-structures.json",
+      "path": "src/objects/helix-volume/source/bake-inputs/references/03-observation-structures.json",
       "bytes": 405
     },
     {
       "originalPath": "labs/nebula/models/helix/joint-fit.json",
-      "path": "src/objects/helix/source/bake-inputs/references/04-joint-fit.json",
+      "path": "src/objects/helix-volume/source/bake-inputs/references/04-joint-fit.json",
       "bytes": 1020
     },
     {
       "originalPath": "labs/nebula/models/helix/kinematics-hco.json",
-      "path": "src/objects/helix/source/evidence/helix/kinematics-hco.json",
+      "path": "src/objects/helix-volume/source/evidence/helix/kinematics-hco.json",
       "bytes": 7355
     }
   ]
diff --git a/src/objects/helix/source/replay-references.json b/src/objects/helix-volume/source/replay-references.json
similarity index 100%
rename from src/objects/helix/source/replay-references.json
rename to src/objects/helix-volume/source/replay-references.json
diff --git a/src/objects/helix/source/request.json b/src/objects/helix-volume/source/request.json
similarity index 100%
rename from src/objects/helix/source/request.json
rename to src/objects/helix-volume/source/request.json
diff --git a/src/objects/helix/source/stellar-field.json b/src/objects/helix-volume/source/stellar-field.json
similarity index 99%
rename from src/objects/helix/source/stellar-field.json
rename to src/objects/helix-volume/source/stellar-field.json
index 3c1fe7ad401..21ee60f1d7d 100644
--- a/src/objects/helix/source/stellar-field.json
+++ b/src/objects/helix-volume/source/stellar-field.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-gaia-nebula-field@1",
-  "id": "helix",
+  "id": "helix-volume",
   "coordinateEpochJulianYear": 2016,
   "selection": {
     "centerIcrsDegrees": [
diff --git a/src/objects/helix/README.md b/src/objects/helix/README.md
index b19fa51708f..92554204ea3 100644
--- a/src/objects/helix/README.md
+++ b/src/objects/helix/README.md
@@ -1,43 +1,16 @@
 # Helix Nebula
 
-Three ESO datasets share a conditional emission field. **ESO WFI optical is the default.** Molecular velocities constrain a coarse scaffold; unmeasured front/back allocation and outer-halo depth remain assumptions.
+Helix Nebula as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Helix Nebula volume](../helix-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Source / dataset | Selected image and coverage |
-| --- | --- |
-| [ESO WFI, eso0907a](https://www.eso.org/public/images/eso0907a/) | B/V/R display; 7059 × 6535 pixels, 28.02′ × 25.94′. |
-| [ESO VISTA, eso1205a](https://www.eso.org/public/images/eso1205a/) | Y/J/K display; 6592² pixels, 37.51′ square. |
-| [ESO 3.6 m, helix](https://www.eso.org/public/images/helix/) | Wider 6850 × 4759-pixel image, 48.82′ × 33.92′; filters not listed by the publisher. |
-| [Molecular component record](source/evidence/helix/kinematics-hco.json) | Zeigler et al. HCO+ measurements condition coarse depth where supported; they do not recover every knot. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/helix.json) cites the position, distance and velocity that place it.
 
-All three photographs are display composites with unequal footprints and band responses. The adopted central-star scale is **216 −12/+14 pc**, from [Benedict et al. (2009), abstract, NGC 7293 distance](https://arxiv.org/abs/0909.4281).
+## Processing
 
-The [stellar field](source/stellar-field.json) contains 6627 Gaia candidates in an authored 50 pc sphere, G < 16. The delivery uses 1466 parallax-informed points plus **34 compact image anchors**: 28 WFI, five VISTA and one wider-ESO core, including the central star. These anchors deliberately retain conditional cloud depths and original source appearance across datasets; catalogue matches do **not** convert those depths into measured distances. One VISTA edge core has image evidence but no Gaia association.
-
-Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
-
-## Evidence
-
-- Final app inspection records front/oblique views across all three datasets after restoring the wider-image cores. Report context documents incomplete historical capture metadata.
-- The final app report identifies cloud result `2794e4cc5c3a…`, and the [object descriptor](object.json) pins its installed bank; the field’s image-anchor receipt separates compact-source evidence, image-component offsets and Gaia angular associations.
-- [Historical registration](../../../labs/nebula/models/helix/README.md#aligned-observations-and-native-star-removal) records held-out RMS of 0.34″ for VISTA and 1.10″ for the wider ESO field relative to WFI. This verifies overlap registration, not absolute astrometry or stellar membership. No new cold replay or material acceptance is claimed.
+1. `pnpm prepare:objects --object=helix` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts helix` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- Residual bright stellar halos remain in the cloud. Retained cores restore visual anchors; they do not make the contaminated diffuse material scientifically star-free.
-- The first 28-core WFI-only fix missed upper halos outside that photograph. The current three-image union resolves that coverage omission; it does not justify arbitrary points on nebular knots.
-- Fine knots, outer-halo completeness, VISTA color streaks and unsupported depth remain unresolved. Earlier one-axis and disk/ring models failed visual inspection.
-
-<details>
-<summary>Methods and historical comparisons</summary>
-
-The [fixed lab account](../../../labs/nebula/models/helix/README.md) preserves the single-axis, disk/ring, tuned-shape and compiler trials as distinct results. The [joint-fit method](../../../labs/nebula/docs/joint-fit.md) records molecular sample-count, beam and front/back limitations. Wider Hubble/CTIO, CFHT and photographer candidates remain documented in the [investigation ledger](investigations.json). Preparation belongs in the [shared guide](../../../docs/nebulae/README.md).
-
-</details>
-
-## Compact delivery inputs
-
-The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
-
-Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/helix/inventory.json b/src/objects/helix/inventory.json
index 5122dc8b563..e6f3bdd5b2c 100644
--- a/src/objects/helix/inventory.json
+++ b/src/objects/helix/inventory.json
@@ -3,567 +3,63 @@
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 }
diff --git a/src/objects/helix/object.json b/src/objects/helix/object.json
index df61b936395..8211705e94b 100644
--- a/src/objects/helix/object.json
+++ b/src/objects/helix/object.json
@@ -1,42 +1,95 @@
 {
   "schema": "cssearth-object@2",
   "id": "helix",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Helix Nebula",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 48469710106800
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Helix Nebula",
+      "systemName": "Milky Way",
+      "classification": "nebula",
+      "color": "#9a9a9a",
+      "distanceAu": 44553198.15,
+      "description": "The Helix is a planetary nebula about 216 parsecs away.",
+      "aliases": [
+        "NGC 7293"
+      ],
+      "order": 5137,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
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-        0.31496089303866553,
-        0.47216834395111507
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-    "preparation": {
-      "source": "source/delivery.json"
+      "orbitUpReference": [
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+      "metersPerUnit": 156353903570322.6,
+      "bodyRadiusM": 48469710106800000
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   },
   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/helix/source/content/object.json b/src/objects/helix/source/content/object.json
new file mode 100644
index 00000000000..01dc816ba63
--- /dev/null
+++ b/src/objects/helix/source/content/object.json
@@ -0,0 +1,123 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "helix",
+  "displayName": "Helix Nebula",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "216 pc (\u221212 / +14 pc)",
+        "source": {
+          "catalogueId": "benedict-2009",
+          "url": "https://arxiv.org/abs/0909.4281",
+          "label": "Benedict et al. (2009), HST parallaxes of planetary nebula nuclei",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 337.4\u00b0, Dec -20.84\u00b0",
+        "source": {
+          "catalogueId": "eso-eso0907a",
+          "url": "https://cdn.eso.org/images/original/eso0907a.tif",
+          "label": "ESO ESO WFI \u00b7 optical detail image and publisher astrometry; registration retained in the observation recipe",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "classification",
+        "label": "Classification",
+        "value": "Planetary nebula",
+        "source": {
+          "catalogueId": "eso-eso0907a",
+          "url": "https://cdn.eso.org/images/original/eso0907a.tif",
+          "label": "ESO ESO WFI \u00b7 optical detail image and publisher astrometry; registration retained in the observation recipe",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "eso-wfi",
+    "controls": [
+      {
+        "id": "eso-vista",
+        "label": "ESO VISTA \u00b7 infrared",
+        "thumbnail": "helix-dataset-eso-vista.webp",
+        "volume": {
+          "objectId": "helix-volume",
+          "datasetId": "eso-vista",
+          "surface": "eso-vista"
+        },
+        "source": {
+          "id": "helix-volume-eso-vista",
+          "path": "../../helix-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1205a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "eso-wfi",
+        "label": "ESO WFI \u00b7 optical detail",
+        "thumbnail": "helix-dataset-eso-wfi.webp",
+        "volume": {
+          "objectId": "helix-volume",
+          "datasetId": "eso-wfi",
+          "surface": "eso-wfi"
+        },
+        "source": {
+          "id": "helix-volume-eso-wfi",
+          "path": "../../helix-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso0907a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "eso-wide",
+        "label": "ESO \u00b7 wider field",
+        "thumbnail": "helix-dataset-eso-wide.webp",
+        "volume": {
+          "objectId": "helix-volume",
+          "datasetId": "eso-wide",
+          "surface": "eso-wide"
+        },
+        "source": {
+          "id": "helix-volume-eso-wide",
+          "path": "../../helix-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/helix/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Benedict et al. (2009), HST parallaxes of planetary nebula nuclei",
+      "href": "https://arxiv.org/abs/0909.4281"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "ESO ESO WFI \u00b7 optical detail image and publisher astrometry; registration retained in the observation recipe",
+      "href": "https://cdn.eso.org/images/original/eso0907a.tif"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://arxiv.org/abs/0909.4281",
+      "credit": "Benedict et al. (2009), HST parallaxes of planetary nebula nuclei"
+    }
+  }
+}
diff --git a/src/objects/helix/source/manifest.json b/src/objects/helix/source/manifest.json
index 52f3d9b2614..9dd37a611ff 100644
--- a/src/objects/helix/source/manifest.json
+++ b/src/objects/helix/source/manifest.json
@@ -1,297 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
-    {
-      "id": "eso-vista",
-      "path": ".local/nebula-lab/observations/helix/sources/eso-vista.tif",
-      "origin": "https://www.eso.org/public/images/eso1205a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1205a/",
-      "title": "Helix · eso1205a",
-      "credit": "ESO/VISTA/J. Emerson. Acknowledgment: Cambridge Astronomical Survey Unit",
-      "displayCredit": "ESO/VISTA/J. Emerson. Acknowledgment: Cambridge Astronomical Survey Unit",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
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-            "catalogueId": "eso-eso1205a",
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-            "evidence": "labs/nebula/models/helix/observations.json#/images/0"
-          }
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-      "datasetId": "eso-vista",
-      "license": "ESO public-image terms; retain the complete recorded credit.",
-      "capture": {
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-            "facilityId": "vista",
-            "evidence": "https://www.eso.org/public/images/eso1205a/"
-          }
-        ]
-      }
-    },
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "eso-wfi",
-      "path": ".local/nebula-lab/observations/helix/sources/eso-wfi.tif",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/eso0907a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso0907a/",
-      "title": "Helix · eso0907a",
-      "credit": "ESO",
-      "displayCredit": "ESO",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
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-          }
-        ]
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-      "dependencies": [],
-      "datasetId": "eso-wfi",
+      "credit": "ESO; the default dataset's picture as the Helix Nebula bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "ESO public-image terms; retain the complete recorded credit.",
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-      "origin": "https://www.eso.org/public/images/helix/",
-      "sourceUrl": "https://www.eso.org/public/images/helix/",
-      "title": "Helix · helix",
-      "credit": "ESO",
-      "displayCredit": "ESO",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
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-        "references": [
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-            "evidence": "labs/nebula/models/helix/observations.json#/images/2"
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-        ]
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-      "datasetId": "eso-wide",
-      "license": "ESO public-image terms; retain the complete recorded credit.",
-      "capture": {
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-            "evidence": "https://www.eso.org/public/images/helix/"
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-      "path": ".local/nebula-lab/kinematics/helix/hco/table1.dat",
-      "origin": "https://doi.org/10.26093/cds/vizier.17780016",
-      "sourceUrl": "https://doi.org/10.26093/cds/vizier.17780016",
-      "title": "Helix HCO+ J=1–0 component fits",
-      "credit": "Zeigler, Zack, Woolf & Ziurys (2013); CDS/VizieR",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
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-            "kind": "facility",
-            "facilityId": "aro-12m-original",
-            "evidence": "https://doi.org/10.1088/0004-637X/778/1/16 — Zeigler et al. (2013) abstract: HCO+ J=1–0 at 89 GHz mapped with the Arizona Radio Observatory 12 m telescope; https://experts.arizona.edu/en/publications/the-helix-nebula-viewed-in-hcosupsup-large-scale-mapping-of-the-j/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "distance",
-      "path": "src/objects/helix/source/delivery.json",
-      "origin": "https://arxiv.org/html/0909.4281",
-      "sourceUrl": "https://arxiv.org/html/0909.4281",
-      "title": "Helix adopted world placement",
-      "credit": "Benedict et al. (2009); cssEarth placement",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "benedict-2009",
-            "role": "reference",
-            "evidence": "src/objects/helix/source/delivery.json: sky.distancePc = 216; adopted world placement"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "stellar-field",
-      "path": "src/objects/helix/source/stellar-field.json",
-      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "title": "Helix Nebula surrounding Gaia DR3 stellar field",
-      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
-      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
-      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "gaia-dr3-gavo",
-            "role": "material",
-            "evidence": "src/objects/helix/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "bailer-jones-2021-distances",
-            "role": "method",
-            "evidence": "src/objects/helix/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "cardiel-2021-rgb",
-            "role": "method",
-            "evidence": "src/objects/helix/source/stellar-field.json#/provenance"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "gaia",
-            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/helix-volume/source/manifest.json)."
       }
     }
   ],
   "documents": [
     {
-      "id": "document-1",
-      "path": "src/objects/helix/source/delivery.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-2",
-      "path": "src/objects/helix/source/nebula.json",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "document-3",
-      "path": "src/objects/helix/source/presentation.json",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "document-4",
-      "path": "src/objects/helix/source/request.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "retained-evidence-5",
-      "path": "src/objects/helix/source/bake-inputs/references/01-compiler.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-6",
-      "path": "src/objects/helix/source/bake-inputs/references/02-observations.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-7",
-      "path": "src/objects/helix/source/bake-inputs/references/03-observation-structures.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-8",
-      "path": "src/objects/helix/source/bake-inputs/references/04-joint-fit.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-9",
-      "path": "src/objects/helix/source/evidence/helix/kinematics-hco.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-10",
-      "path": "src/objects/helix/source/provenance-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-11",
-      "path": "src/objects/helix/source/replay-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
-      }
-    }
-  ],
-  "generatedIntermediates": [
-    {
-      "id": "compact-bake-inputs-json-gz",
-      "path": "src/objects/helix/source/bake-inputs.json.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
+      "path": "preparation/navigation.json"
     }
   ]
 }
diff --git a/src/objects/helix/source/preparation/navigation.json b/src/objects/helix/source/preparation/navigation.json
new file mode 100644
index 00000000000..dec8776f266
--- /dev/null
+++ b/src/objects/helix/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "helix",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/helix/source/presentation/context.png b/src/objects/helix/source/presentation/context.png
new file mode 100644
index 00000000000..bce7d17e6bf
Binary files /dev/null and b/src/objects/helix/source/presentation/context.png differ
diff --git a/src/objects/helix/source/presentation/solar-system.json b/src/objects/helix/source/presentation/solar-system.json
new file mode 100644
index 00000000000..e0e03b96235
--- /dev/null
+++ b/src/objects/helix/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "helix",
+  "displayName": "Helix Nebula",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 48469710106800.0,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/helix/text.json b/src/objects/helix/text.json
new file mode 100644
index 00000000000..6a805bf4604
--- /dev/null
+++ b/src/objects/helix/text.json
@@ -0,0 +1,72 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "helix",
+  "card": {
+    "text": "The Helix is a planetary nebula about 216 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "benedict-2009",
+        "url": "https://arxiv.org/abs/0909.4281",
+        "label": "Benedict et al. (2009), HST parallaxes of planetary nebula nuclei",
+        "checked": "2026-10-01",
+        "locator": "distance: 216 pc (−12 / +14 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "The Helix is a planetary nebula about 216 parsecs away. Its broad ring of glowing gas surrounds the remnant central star.",
+    "sources": [
+      {
+        "catalogueId": "benedict-2009",
+        "url": "https://arxiv.org/abs/0909.4281",
+        "label": "Benedict et al. (2009), HST parallaxes of planetary nebula nuclei",
+        "checked": "2026-10-01",
+        "locator": "distance: 216 pc (−12 / +14 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "eso-vista": {
+      "title": "Helix in near infrared",
+      "detail": "6592 × 6592 px",
+      "summary": "Near-infrared false color on a partly velocity-constrained model; halo and bright-core depths remain inferred.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1205a",
+          "url": "https://www.eso.org/public/images/eso1205a/",
+          "label": "Helix · eso1205a; ESO/VISTA/J. Emerson. Acknowledgment: Cambridge Astronomical Survey Unit",
+          "checked": "2026-10-01",
+          "locator": "Helix · eso1205a"
+        }
+      ]
+    },
+    "eso-wfi": {
+      "title": "Helix in visible light",
+      "detail": "7059 × 6535 px",
+      "summary": "Optical display on a partly velocity-constrained model; halo and bright-core depths remain inferred.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso0907a",
+          "url": "https://www.eso.org/public/images/eso0907a/",
+          "label": "Helix · eso0907a; ESO",
+          "checked": "2026-10-01",
+          "locator": "Helix · eso0907a"
+        }
+      ]
+    },
+    "eso-wide": {
+      "title": "The wider Helix field",
+      "detail": "6850 × 4759 px",
+      "summary": "Wide optical display on a partly velocity-constrained model; halo and bright-core depths remain inferred.",
+      "sources": [
+        {
+          "catalogueId": "eso-helix",
+          "url": "https://www.eso.org/public/images/helix/",
+          "label": "Helix · helix; ESO",
+          "checked": "2026-10-01",
+          "locator": "Helix · helix"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/lmc-volume/README.md b/src/objects/lmc-volume/README.md
new file mode 100644
index 00000000000..2082e149b53
--- /dev/null
+++ b/src/objects/lmc-volume/README.md
@@ -0,0 +1,50 @@
+# Large Magellanic Cloud (LMC)
+
+Three published images colour one shared three-dimensional emission model; **Horálek optical is the default**. Each dataset carries the same 242 directional slices (97 x, 80 y, 65 z) and the same 1,042 catalogue stars, so switching datasets changes colour and never geometry. Nothing here measures gas or dust depth.
+
+The shape is a hypothesis with two parts. A broad envelope carries 80.75% of the Horálek image light along the depth distribution of the **Garver et al. stellar simulation**, and 470 fitted detail components sit at the strongest simulation mode along their own sightlines. The LMC has no observational depth tracer in this repository, so, unlike the SMC's ellipsoid, the envelope shape is the simulation's own and untested. Catalogue-star depths are realizations inside that model, not distances.
+
+## Sources
+
+| Source / dataset | Role and selected input |
+| --- | --- |
+| [Garver, Nidever, Debattista & Deg simulation](https://doi.org/10.5061/dryad.1vhhmgr82) | Stellar-density prior: the envelope's depth distribution and the detail components' line-of-sight modes. |
+| [Horálek optical, iotw2547a](https://noirlab.edu/public/images/iotw2547a/) | 6582 × 4388-pixel visible-light photograph; also the image the emission model was fitted to. Acquisition instrument and exact bands unspecified. |
+| [ESO VISTA, eso1914a](https://www.eso.org/public/images/eso1914a/) | Y/J/Ks near-infrared display; 8954 × 10000 pixels. |
+| [NASA/IPAC AllWISE through CDS](https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html) | W4/W2/W1 false-colour HiPS mosaic; 6000² pixels across 24°, not native detector sampling. |
+| [Bonanos et al. (2009)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1003) | Observed sky positions and Johnson V for 1,042 selected massive stars; their depths are model-contained realizations. |
+| [SMASH, noirlab2030a](https://noirlab.edu/public/images/noirlab2030a/) | Shared sky-registration reference every image is matched to. |
+| [Nidever et al. (2019)](https://arxiv.org/abs/1805.02671) | [Stellar extent](source/stellar-extent.json): LMC stars detected out to R ≈ 21°, about 18.5 kpc. Inside that radius the LMC's caption hides; outside it the caption hangs under the LMC's framing sphere. It marks where stars are still measured, not a boundary. |
+
+Native photographs supply colour after registered star removal.
+
+Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; the search was not exhaustive.
+
+## Processing
+
+1. **Registration.** Each image keeps its measured sky solution from the pinned [alignment report](source/evidence/lmc/candidates/source/alignment-report.json). The model is placed with the identity placement, which reproduces the registered Horálek corners to 0.000″.
+2. **Emission.** The registered, star-removed Horálek image is smoothed and divided by the integrated simulation column to give an envelope gain, so image brightness scales the envelope but never moves it in depth. The remaining detail is fitted with 470 positive finite components. [`emission-envelope.json`](source/evidence/lmc/envelope/emission-envelope.json) is the recipe; [EMISSION-METHOD.md](../../../labs/nebula/models/lmc/envelope/EMISSION-METHOD.md) explains the method, and the [SMC method note](../../../labs/nebula/models/smc/constrained/EMISSION-METHOD.md) owns the derivation. The fit covers only the registered Horálek footprint (10.06 × 6.74°).
+3. **Datasets.** [`finite-datasets.json`](source/evidence/lmc/envelope/finite-lenses.json) bakes each registered image onto that one geometry with a per-channel tone curve fitted against that dataset's own image ([receipt](source/lens-settings-evidence.json)).
+4. **Delivery.** The [compact inputs](source/compact/inputs.json) carry exactly what a replay needs, and `pnpm prepare:nebulae --if-missing` rebuilds the bank and its atlases from them alone. Each delivered byte's laboratory record is numbered under [`bake-inputs/references/`](source/bake-inputs/references).
+5. **Stars.** Bonanos Table 3 rows with finite V ≤ 16 whose ray lands on a covered footprint pixel are placed at a fixed per-star quantile of the model density. 1,042 are placed; 39 rows outside the Horálek footprint are not. [Star preparation](../../../labs/nebula/models/lmc/stars/README.md) records the selection.
+
+## Evidence
+
+- **Fit.** Projection RMSE 0.03247 after fitting against 0.10458 before. The envelope carries 80.75% of the image light.
+- **Registration.** Of the 40 brightest catalogue stars projected onto the registered Horálek image, 17 fall within 1 px of a photographic peak (median 1.19 px, 22.9″); mirroring gives 1 of 40. Half of that residual is already in the publisher frame.
+- **Datasets against their own images.** After the tone fit, render flux differs from each dataset's own image by Horálek +1.8%, VISTA +16.6% and AllWISE +264%.
+- **App inspection.** Captures from the running application cover the Earth view, an oblique view, both 90° side views, all three dataset switches and stars on and off. The side views show line-of-sight extent rather than a flat sheet.
+- **Replay.** With the laboratory caches moved aside, all 726 regenerated slice textures are byte-identical to the promotion output. The [object descriptor](object.json) names the result and the [prepared inventory](inventory.json) pins it.
+
+![The LMC page with HV 2827, HV 877 and HV 900 ringed and named](evidence/2026-10-01/featured-cepheids.jpg)
+
+A browser capture of this page: the 35 packaged stars of the Cloud draw as dots, and the three largest by measured radius ([Groenewegen 2013](https://arxiv.org/abs/1212.5478)), HV 2827, HV 877 and HV 900, are featured: ringed, named and opened by a click. The rest are plain dots, reachable through search. A Cloud star's dot is gone once the camera is as far from it as the Sun is, so none shows from inside the Milky Way. The SMC features HV 837 and HV 822 the same way.
+
+## Known problems
+
+- **VISTA and AllWISE are brighter than their own images:** +17% and +264% after fitting. Every dataset shares the one opacity fitted to Horálek, so a tone curve can only dim or recolour inside it. AllWISE's own composite spans about 19 grey levels inside its footprint.
+- The envelope is the simulation's shape hypothesis and the detail components are conditioned on the same simulation; neither is measured gas geometry. The model records `materialGatePassed: false`. The LMC has no depth tracer here to test it.
+- The fit is cut along the Horálek image's bottom edge, and its black point still clips the faint outer halo. The brightest 0.1% of pixels reach only 0.89–0.96 of the image.
+- A violet-blue patch can remain on the western footprint edge, and a small detached knot group appears above the body at oblique and side poses.
+- Faint concentric ripples remain where alpha is still quantized. Detail is bounded by the 384-pixel fit and 128 slabs on the longest axis.
+- Star removal leaves crowded and saturated stars and can remove compact nebular light.
diff --git a/src/objects/lmc/evidence/2026-10-01/featured-cepheids.jpg b/src/objects/lmc-volume/evidence/2026-10-01/featured-cepheids.jpg
similarity index 100%
rename from src/objects/lmc/evidence/2026-10-01/featured-cepheids.jpg
rename to src/objects/lmc-volume/evidence/2026-10-01/featured-cepheids.jpg
diff --git a/src/objects/lmc-volume/inventory.json b/src/objects/lmc-volume/inventory.json
new file mode 100644
index 00000000000..491f86c74a1
--- /dev/null
+++ b/src/objects/lmc-volume/inventory.json
@@ -0,0 +1,569 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/horalek-widefield.webp",
+      "bytes": 17694,
+      "sha256": "be44190a4331e8adca4916cc65b5e915fbd4da9ca57fc01600a9eaaf7ec97437"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/vista-infrared.webp",
+      "bytes": 26292,
+      "sha256": "a8f1523029e389d604d29d0b2259a390d1da207626afba7e50ac53c3da78a687"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/wise-wide-infrared.webp",
+      "bytes": 2868,
+      "sha256": "644e6040cda7ebb15e63daaa90522fef3fa9e188d48859d62f2429599c098b26"
+    },
+    {
+      "location": "prepared",
+      "filename": "datasets.json",
+      "bytes": 1228122,
+      "sha256": "e60d068ef20c6114994efed308d55e07823f0cff9603de3b600549d2ee580d61"
+    },
+    {
+      "location": "prepared",
+      "filename": "delivery.json",
+      "bytes": 42843,
+      "sha256": "5f050f0959b9daec40c7309be9304a01dbe69aa2b88cffdbbd8af36609bf09ca"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/atlases/x.webp",
+      "bytes": 506968,
+      "sha256": "5514e817c84da9627a16ae24a29f547920797b26850dd5a9e546c8c9ae7abf8e"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/atlases/y.webp",
+      "bytes": 435438,
+      "sha256": "e254b9b22a22ac77982a40512426b54c3874269e9e17dcb4cdd4bcd68e2f9425"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/atlases/z.webp",
+      "bytes": 455694,
+      "sha256": "c7e52b6e9c8dabe033459b6dea9406fbf88dd02fafff0f3cc96a837f4a0adcba"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/impostors/view-00n.png",
+      "bytes": 21285,
+      "sha256": "5d8cfae9f88e1723122eb210c58f5e63e7279ac48779038feb54c3d78fef7d08"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/impostors/view-00p.png",
+      "bytes": 21291,
+      "sha256": "680c8704f6c9f894ea301fc7a9122ec557c6406a8c8a31a8d8b48d707a1d0453"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/impostors/view-0n0.png",
+      "bytes": 19870,
+      "sha256": "2bda8c0298d4324dfd02ca9beb9bb01c22aab98070af48286baf4d1351fda791"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/impostors/view-0nn.png",
+      "bytes": 23328,
+      "sha256": "b70eeeeb1f93af8f068fb2c5feca5518e1d71fbd2962fac5c8c2c36581627da9"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/impostors/view-0np.png",
+      "bytes": 25499,
+      "sha256": "21026b51f1f4c1aaaf3b79106cfcb98e723056ad67b50d8b19de1b11745246a1"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/impostors/view-0p0.png",
+      "bytes": 20031,
+      "sha256": "cfa651fc306b4b2282b5895643ab2655952e04af86278aa2d42df5b726843ccd"
+    },
+    {
+      "location": "prepared",
+      "filename": "horalek-widefield/impostors/view-0pn.png",
+      "bytes": 25696,
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+      "sha256": "7e5f13f82fad425ab5cca60d83f75872990d142119455c9f72d37667b752e56f"
+    }
+  ]
+}
diff --git a/src/objects/lmc/investigations.json b/src/objects/lmc-volume/investigations.json
similarity index 94%
rename from src/objects/lmc/investigations.json
rename to src/objects/lmc-volume/investigations.json
index ab81b277c03..37e73585df5 100644
--- a/src/objects/lmc/investigations.json
+++ b/src/objects/lmc-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "lmc",
+  "objectId": "lmc-volume",
   "entries": [
     {
       "id": "dataset-vista-infrared",
@@ -8,10 +8,10 @@
       "status": "included",
       "finding": "Shipped dataset, now recolouring the finite-emission model lmc-clouds-emission-envelope with its own fitted tone curve (result lmc-clouds-emission-envelope-vista-infrared). Registration unchanged: 5340 held-out matches qualify it inside its matched hull; exterior placement is extrapolated. After the tone fit its analytic render is still 16.6% brighter than its own image (hue error 5.70°), because every dataset shares the one opacity fitted to Horálek; a per-dataset opacity scale would be needed. Earlier finding (2026-09-14, repaint delivery): Default ESO Y/J/Ks display, 8954 by 10000 pixels, repaints the existing simulated density without changing geometry or alpha. The 5340 held-out matches qualify relative registration inside its matched hull; exterior placement is extrapolated.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/presentation.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/lenses/vista-infrared/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/lenses/vista-infrared/provenance.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/lmc/candidates/source/alignment-report.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json"
       ]
     },
     {
@@ -20,10 +20,10 @@
       "status": "included",
       "finding": "Default dataset and the image the finite-emission model lmc-clouds-emission-envelope was fitted to (result lmc-clouds-emission-envelope-horalek-widefield, tone-fitted). Registration unchanged: 198 held-out matches over a 60.2 percent hull; extended placement is extrapolated. After the tone fit its analytic render is 1.8% brighter than its own image with a 3.76° hue error. Earlier finding (2026-09-14, repaint delivery): Horálek visible-light photograph, 6582 by 4388 pixels, with acquisition instrument/bands unresolved. The 198 held-out matches qualify relative registration over a 60.2 percent hull. Exact density/alpha and the shared catalogue remain fixed; extended placement is extrapolated.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/presentation.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/lenses/horalek-widefield/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/lenses/horalek-widefield/provenance.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/lmc/candidates/source/alignment-report.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json"
       ]
     },
     {
@@ -32,10 +32,10 @@
       "status": "included",
       "finding": "Shipped dataset, now recolouring the finite-emission model lmc-clouds-emission-envelope with its own fitted tone curve (result lmc-clouds-emission-envelope-wise-wide-infrared). Its fixed WCS check is unchanged. After the tone fit its analytic render is still 264% brighter than its own image (hue error 8.14°): its composite spans about 19 grey levels inside its footprint and the curve is pinned at its floor under the shared opacity, so a per-dataset opacity scale would be needed. Earlier finding (2026-09-14, repaint delivery): NASA/IPAC AllWISE W4/W2/W1 color HiPS mosaic, 6000² pixels across 24 degrees. Its fixed WCS passed 34,811 independently retrieved AllWISE W1 matches without fitting a transform. This validates W1 geometry, not diffuse photometry, visible seams or simulated gas depth.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/presentation.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/lenses/wise-wide-infrared/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/lenses/wise-wide-infrared/provenance.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/lmc/candidates/source/alignment-report.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json"
       ]
     },
     {
@@ -47,7 +47,7 @@
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/lmc/full-density/source/volume.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/docs/slice-stability.md",
         "https://doi.org/10.5061/dryad.1vhhmgr82",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json"
       ]
     },
     {
@@ -57,7 +57,7 @@
       "finding": "1,042 stars with finite V <= 16 on covered Horálek footprint pixels are placed by the finite-model star layer: each depth inverts the joint emission x simulation density x (1+z/D)^2 CDF at a fixed per-star quantile. 39 rows the former 3x placement swallowed fall outside the true footprint. Brightest-40 stars against the registered image: 17 within 1 px, median 1.19 px (22.9 arcsec), mirrored control 1 of 40. No individual distances are measured. Earlier finding (2026-09-14, repaint delivery, 943 stars): Measured J2000 sky positions and Johnson V <= 16 inside the SMASH footprint select 943 stars. A deterministic joint cloud-emission and stellar-density prior assigns depth along each ray; no individual distances or proper-motion propagation are measured by this preparation.",
       "evidence": [
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/lmc/stars/README.md",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/lenses.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/lenses.json",
         "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1003"
       ]
     },
@@ -67,7 +67,7 @@
       "status": "included",
       "finding": "The original SMASH publisher frame remains the image-registration and stellar-selection reference. The former photo-colored dataset and parametric source recipe are historical; their retained source.jpg is a publisher AstroPix derivative, not a local observation.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/provenance.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/lmc/candidates/source/alignment-report.json",
         "https://noirlab.edu/public/images/noirlab2030a/"
       ]
@@ -79,7 +79,7 @@
       "finding": "Pinned native source removal and the earlier positive compact-residual union supply starless color inputs. Exact RGB recombination and unchanged pixels outside masks qualify accounting only; crowded blends and intrinsic knots remain ambiguous.",
       "evidence": [
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/lmc/star-separation/README.md",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/lenses/vista-infrared/provenance.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/lenses/vista-infrared/provenance.json"
       ]
     },
     {
@@ -88,9 +88,9 @@
       "status": "included",
       "finding": "Superseded by the finite-emission promotion: the three datasets ship with identity appearance controls, and each dataset's correction is its fitted tone curve inside the result identity; the new receipt pins the three result ids. Earlier finding (2026-09-14): The saved browser handoff pins VISTA, Horálek and WISE result identities and authored appearance controls. Existing delivery byte targets make restoration reviewable; this 2026-09-14 documentation audit is not a new cold-cache replay or material acceptance.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/lens-settings-evidence.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/lenses.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/lens-manifest.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/lens-settings-evidence.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/lenses.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/lens-manifest.json"
       ]
     },
     {
@@ -203,7 +203,7 @@
       "status": "included",
       "finding": "Model lmc-clouds-emission-envelope (recipe emission-envelope.json, exposure 2.418, alpha chroma limit 11) fits the registered, star-removed Horálek image: 470 components, projection RMSE 0.10458 -> 0.03247, total relative squared error 0.013060, envelope 80.75% of the light with 3.29% excess, all components on prior support. Placement is the identity, which reproduces the registered corners to 0.000 arcsec; the envelope keeps the simulation shape. materialGatePassed is false: the depth structure is a hypothesis.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/lmc/envelope/EMISSION-METHOD.md",
         "https://doi.org/10.5061/dryad.1vhhmgr82"
       ]
@@ -214,7 +214,7 @@
       "status": "excluded",
       "finding": "The previous LMC bank repainted one fixed simulated density with each registered image (144 slices per dataset, 943 stars, VISTA default), constrained from the Earth-facing view only and placed on a hand-authored 3x display fit. Its 432 slices and 9 atlases leave the prepared inventory, its compact bake inputs and atlas mapping are removed, and the laboratory bake recipe no longer delivers to the application. Its source record, recipe and retained evidence stay as documents; its README at the last delivering revision keeps its account.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/compact-delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/compact-delivery.json",
         "https://noirlab.edu/public/images/noirlab2030a/"
       ],
       "revisitWhen": "A future delivery needs a projection-only repaint again, or the retired record is shown to misstate its own inputs."
@@ -225,10 +225,10 @@
       "status": "included",
       "finding": "6.6 MB of compact replay inputs regenerate the bank through prepare:nebulae. With the laboratory caches moved aside and prepared/ removed, all 726 regenerated slice textures are byte-identical to the promotion output, and the bank, its 9 atlases and the delivery receipt are byte-identical to the first restore; the lab-isolated application gate reproduces them too. The 13 prepared files are published to R2 and restore byte-identically through setup:prepared. The replay applies each dataset tone curve; dropping it turns lmc-volume-datasets.test.mts red.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/source/compact/inputs.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/source/compact/inputs.json",
         "https://github.com/layoutit/css.earth/blob/main/packages/bake/src/volume/node/compact-inputs/finite-emission.ts",
         "https://github.com/layoutit/css.earth/blob/main/site/test/lmc-volume-lenses.test.mts",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc/inventory.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/lmc-volume/inventory.json"
       ]
     },
     {
diff --git a/src/objects/lmc-volume/object.json b/src/objects/lmc-volume/object.json
new file mode 100644
index 00000000000..094c1020100
--- /dev/null
+++ b/src/objects/lmc-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "lmc-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        105965308676973530000,
+        533209933280955330000,
+        -1.4303831216834226e+21
+      ],
+      "localToReferenceXyzw": [
+        0.09631989992847079,
+        0.9788280334299664,
+        0.17973685917567428,
+        0.01768669847817273
+      ],
+      "metersPerUnit": 30856775814913670000,
+      "boundsUnits": {
+        "min": [
+          -5.365053401638654,
+          -5.725722957908919,
+          -3.286750705393898
+        ],
+        "max": [
+          8.013586896106158,
+          6.16128561310083,
+          5.969691017466296
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/compact-delivery.json"
+    },
+    "host": "lmc"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/lmc/source/bake-inputs/references/01-emission-model.json b/src/objects/lmc-volume/source/bake-inputs/references/01-emission-model.json
similarity index 100%
rename from src/objects/lmc/source/bake-inputs/references/01-emission-model.json
rename to src/objects/lmc-volume/source/bake-inputs/references/01-emission-model.json
diff --git a/src/objects/lmc/source/bake-inputs/references/02-emission-recipe.json b/src/objects/lmc-volume/source/bake-inputs/references/02-emission-recipe.json
similarity index 67%
rename from src/objects/lmc/source/bake-inputs/references/02-emission-recipe.json
rename to src/objects/lmc-volume/source/bake-inputs/references/02-emission-recipe.json
index 33b5ec719cc..d31cc9e44c2 100644
--- a/src/objects/lmc/source/bake-inputs/references/02-emission-recipe.json
+++ b/src/objects/lmc-volume/source/bake-inputs/references/02-emission-recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-delivered-input-reference@1",
-  "originalPath": "src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json",
+  "originalPath": "src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json",
   "bytes": 1291,
   "role": "Laboratory record behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
 }
diff --git a/src/objects/lmc/source/bake-inputs/references/03-lens-recipe.json b/src/objects/lmc-volume/source/bake-inputs/references/03-lens-recipe.json
similarity index 68%
rename from src/objects/lmc/source/bake-inputs/references/03-lens-recipe.json
rename to src/objects/lmc-volume/source/bake-inputs/references/03-lens-recipe.json
index eb16e4e7006..832ab8a6479 100644
--- a/src/objects/lmc/source/bake-inputs/references/03-lens-recipe.json
+++ b/src/objects/lmc-volume/source/bake-inputs/references/03-lens-recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-delivered-input-reference@1",
-  "originalPath": "src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json",
+  "originalPath": "src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json",
   "bytes": 8202,
   "role": "Laboratory record behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
 }
diff --git a/src/objects/lmc/source/bake-inputs/references/04-promotion-recipe.json b/src/objects/lmc-volume/source/bake-inputs/references/04-promotion-recipe.json
similarity index 100%
rename from src/objects/lmc/source/bake-inputs/references/04-promotion-recipe.json
rename to src/objects/lmc-volume/source/bake-inputs/references/04-promotion-recipe.json
diff --git a/src/objects/lmc/source/bake-inputs/references/05-depth-density.json b/src/objects/lmc-volume/source/bake-inputs/references/05-depth-density.json
similarity index 100%
rename from src/objects/lmc/source/bake-inputs/references/05-depth-density.json
rename to src/objects/lmc-volume/source/bake-inputs/references/05-depth-density.json
diff --git a/src/objects/lmc/source/bake-inputs/references/06-catalogue-stars.json b/src/objects/lmc-volume/source/bake-inputs/references/06-catalogue-stars.json
similarity index 100%
rename from src/objects/lmc/source/bake-inputs/references/06-catalogue-stars.json
rename to src/objects/lmc-volume/source/bake-inputs/references/06-catalogue-stars.json
diff --git a/src/objects/lmc/source/bake-inputs/references/07-baseline-horalek-widefield.json b/src/objects/lmc-volume/source/bake-inputs/references/07-baseline-horalek-widefield.json
similarity index 100%
rename from src/objects/lmc/source/bake-inputs/references/07-baseline-horalek-widefield.json
rename to src/objects/lmc-volume/source/bake-inputs/references/07-baseline-horalek-widefield.json
diff --git a/src/objects/lmc/source/bake-inputs/references/08-baseline-vista-infrared.json b/src/objects/lmc-volume/source/bake-inputs/references/08-baseline-vista-infrared.json
similarity index 100%
rename from src/objects/lmc/source/bake-inputs/references/08-baseline-vista-infrared.json
rename to src/objects/lmc-volume/source/bake-inputs/references/08-baseline-vista-infrared.json
diff --git a/src/objects/lmc/source/bake-inputs/references/09-baseline-wise-wide-infrared.json b/src/objects/lmc-volume/source/bake-inputs/references/09-baseline-wise-wide-infrared.json
similarity index 100%
rename from src/objects/lmc/source/bake-inputs/references/09-baseline-wise-wide-infrared.json
rename to src/objects/lmc-volume/source/bake-inputs/references/09-baseline-wise-wide-infrared.json
diff --git a/src/objects/lmc/source/compact-delivery.json b/src/objects/lmc-volume/source/compact-delivery.json
similarity index 63%
rename from src/objects/lmc/source/compact-delivery.json
rename to src/objects/lmc-volume/source/compact-delivery.json
index 6a49feb120a..b5ddd1180c9 100644
--- a/src/objects/lmc/source/compact-delivery.json
+++ b/src/objects/lmc-volume/source/compact-delivery.json
@@ -1,11 +1,11 @@
 {
   "schema": "cssearth-compact-density-delivery@1",
-  "id": "lmc",
+  "id": "lmc-volume",
   "delivery": {
-    "directory": "src/objects/lmc",
+    "directory": "src/objects/lmc-volume",
     "method": "finite-emission",
     "compactInputs": {
-      "path": "src/objects/lmc/source/compact/inputs.json"
+      "path": "src/objects/lmc-volume/source/compact/inputs.json"
     }
   },
   "researchRecipe": {
diff --git a/src/objects/lmc/source/compact/emission-field.json.gz b/src/objects/lmc-volume/source/compact/emission-field.json.gz
similarity index 100%
rename from src/objects/lmc/source/compact/emission-field.json.gz
rename to src/objects/lmc-volume/source/compact/emission-field.json.gz
diff --git a/src/objects/lmc/source/compact/envelope.json.gz b/src/objects/lmc-volume/source/compact/envelope.json.gz
similarity index 100%
rename from src/objects/lmc/source/compact/envelope.json.gz
rename to src/objects/lmc-volume/source/compact/envelope.json.gz
diff --git a/src/objects/lmc/source/compact/fit-projection.png b/src/objects/lmc-volume/source/compact/fit-projection.png
similarity index 100%
rename from src/objects/lmc/source/compact/fit-projection.png
rename to src/objects/lmc-volume/source/compact/fit-projection.png
diff --git a/src/objects/lmc/source/compact/inputs.json b/src/objects/lmc-volume/source/compact/inputs.json
similarity index 90%
rename from src/objects/lmc/source/compact/inputs.json
rename to src/objects/lmc-volume/source/compact/inputs.json
index f83b504c05d..832bdb5ba7e 100644
--- a/src/objects/lmc/source/compact/inputs.json
+++ b/src/objects/lmc-volume/source/compact/inputs.json
@@ -73,27 +73,27 @@
     "quality": 92
   },
   "emissionField": {
-    "path": "src/objects/lmc/source/compact/emission-field.json.gz",
+    "path": "src/objects/lmc-volume/source/compact/emission-field.json.gz",
     "bytes": 20704
   },
   "envelope": {
-    "path": "src/objects/lmc/source/compact/envelope.json.gz",
+    "path": "src/objects/lmc-volume/source/compact/envelope.json.gz",
     "bytes": 347750
   },
   "neutralSlices": {
-    "path": "src/objects/lmc/source/compact/neutral-slices.json.gz",
+    "path": "src/objects/lmc-volume/source/compact/neutral-slices.json.gz",
     "bytes": 39903
   },
-  "neutralTextures": "src/objects/lmc/source/compact/neutral",
+  "neutralTextures": "src/objects/lmc-volume/source/compact/neutral",
   "priorCloud": {
     "recipe": {
-      "path": "src/objects/lmc/source/compact/prior/volume.json",
+      "path": "src/objects/lmc-volume/source/compact/prior/volume.json",
       "bytes": 1370
     }
   },
   "toneProjection": {
     "image": {
-      "path": "src/objects/lmc/source/compact/fit-projection.png",
+      "path": "src/objects/lmc-volume/source/compact/fit-projection.png",
       "bytes": 58725
     },
     "width": 384,
@@ -110,7 +110,7 @@
     }
   },
   "stars": {
-    "path": "src/objects/lmc/source/compact/stars.json.gz",
+    "path": "src/objects/lmc-volume/source/compact/stars.json.gz",
     "bytes": 98673
   },
   "datasets": [
@@ -127,11 +127,11 @@
         ]
       },
       "registered": {
-        "path": "src/objects/lmc/source/compact/lenses/horalek-widefield/registered.png",
+        "path": "src/objects/lmc-volume/source/compact/lenses/horalek-widefield/registered.png",
         "bytes": 1402422
       },
       "coverage": {
-        "path": "src/objects/lmc/source/compact/lenses/horalek-widefield/coverage.png",
+        "path": "src/objects/lmc-volume/source/compact/lenses/horalek-widefield/coverage.png",
         "bytes": 6909
       },
       "densityFilter": {
@@ -143,7 +143,7 @@
         "all-light"
       ],
       "provenance": {
-        "path": "src/objects/lmc/source/lenses/horalek-widefield/provenance.json"
+        "path": "src/objects/lmc-volume/source/lenses/horalek-widefield/provenance.json"
       },
       "presentation": {
         "label": "Hor\u00e1lek optical",
@@ -320,11 +320,11 @@
         ]
       },
       "registered": {
-        "path": "src/objects/lmc/source/compact/lenses/vista-infrared/registered.png",
+        "path": "src/objects/lmc-volume/source/compact/lenses/vista-infrared/registered.png",
         "bytes": 1839895
       },
       "coverage": {
-        "path": "src/objects/lmc/source/compact/lenses/vista-infrared/coverage.png",
+        "path": "src/objects/lmc-volume/source/compact/lenses/vista-infrared/coverage.png",
         "bytes": 8723
       },
       "densityFilter": {
@@ -336,7 +336,7 @@
         "all-light"
       ],
       "provenance": {
-        "path": "src/objects/lmc/source/lenses/vista-infrared/provenance.json"
+        "path": "src/objects/lmc-volume/source/lenses/vista-infrared/provenance.json"
       },
       "presentation": {
         "label": "ESO VISTA",
@@ -513,11 +513,11 @@
         ]
       },
       "registered": {
-        "path": "src/objects/lmc/source/compact/lenses/wise-wide-infrared/registered.png",
+        "path": "src/objects/lmc-volume/source/compact/lenses/wise-wide-infrared/registered.png",
         "bytes": 667742
       },
       "coverage": {
-        "path": "src/objects/lmc/source/compact/lenses/wise-wide-infrared/coverage.png",
+        "path": "src/objects/lmc-volume/source/compact/lenses/wise-wide-infrared/coverage.png",
         "bytes": 4181
       },
       "densityFilter": {
@@ -529,7 +529,7 @@
         "all-light"
       ],
       "provenance": {
-        "path": "src/objects/lmc/source/lenses/wise-wide-infrared/provenance.json"
+        "path": "src/objects/lmc-volume/source/lenses/wise-wide-infrared/provenance.json"
       },
       "presentation": {
         "label": "NASA AllWISE",
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diff --git a/src/objects/lmc/source/compact/prior/provenance.json b/src/objects/lmc-volume/source/compact/prior/provenance.json
similarity index 100%
rename from src/objects/lmc/source/compact/prior/provenance.json
rename to src/objects/lmc-volume/source/compact/prior/provenance.json
diff --git a/src/objects/lmc/source/compact/prior/volume.json b/src/objects/lmc-volume/source/compact/prior/volume.json
similarity index 100%
rename from src/objects/lmc/source/compact/prior/volume.json
rename to src/objects/lmc-volume/source/compact/prior/volume.json
diff --git a/src/objects/lmc/source/compact/stars.json.gz b/src/objects/lmc-volume/source/compact/stars.json.gz
similarity index 100%
rename from src/objects/lmc/source/compact/stars.json.gz
rename to src/objects/lmc-volume/source/compact/stars.json.gz
diff --git a/src/objects/lmc/source/evidence/image-candidates.json b/src/objects/lmc-volume/source/evidence/image-candidates.json
similarity index 100%
rename from src/objects/lmc/source/evidence/image-candidates.json
rename to src/objects/lmc-volume/source/evidence/image-candidates.json
diff --git a/src/objects/lmc/source/evidence/lmc/bake.json b/src/objects/lmc-volume/source/evidence/lmc/bake.json
similarity index 91%
rename from src/objects/lmc/source/evidence/lmc/bake.json
rename to src/objects/lmc-volume/source/evidence/lmc/bake.json
index 243a9300b79..569dbbcbfc5 100644
--- a/src/objects/lmc/source/evidence/lmc/bake.json
+++ b/src/objects/lmc-volume/source/evidence/lmc/bake.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-bake@1",
-  "id": "lmc",
+  "id": "lmc-volume",
   "subjectId": "lmc-clouds",
   "densityObjects": [
     "labs/nebula/models/lmc/full-density",
@@ -117,15 +117,15 @@
     }
   ],
   "delivery": {
-    "directory": "src/objects/lmc",
+    "directory": "src/objects/lmc-volume",
     "manifest": {
-      "path": "src/objects/lmc/source/lens-manifest.json"
+      "path": "src/objects/lmc-volume/source/lens-manifest.json"
     },
     "atlasInputs": {
-      "path": "src/objects/lmc/source/atlas-inputs.json"
+      "path": "src/objects/lmc-volume/source/atlas-inputs.json"
     },
     "compactInputs": {
-      "path": "src/objects/lmc/source/bake-inputs/inputs.json"
+      "path": "src/objects/lmc-volume/source/bake-inputs/inputs.json"
     }
   },
   "starCalibration": {
diff --git a/src/objects/lmc/source/evidence/lmc/candidates/source/alignment-report.json b/src/objects/lmc-volume/source/evidence/lmc/candidates/source/alignment-report.json
similarity index 100%
rename from src/objects/lmc/source/evidence/lmc/candidates/source/alignment-report.json
rename to src/objects/lmc-volume/source/evidence/lmc/candidates/source/alignment-report.json
diff --git a/src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json b/src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json
similarity index 100%
rename from src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json
rename to src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json
diff --git a/src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json b/src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json
similarity index 100%
rename from src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json
rename to src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json
diff --git a/src/objects/lmc/source/evidence/lmc/particles/source/provenance.json b/src/objects/lmc-volume/source/evidence/lmc/particles/source/provenance.json
similarity index 100%
rename from src/objects/lmc/source/evidence/lmc/particles/source/provenance.json
rename to src/objects/lmc-volume/source/evidence/lmc/particles/source/provenance.json
diff --git a/src/objects/lmc/source/evidence/lmc/stars/source/catalogue.json b/src/objects/lmc-volume/source/evidence/lmc/stars/source/catalogue.json
similarity index 100%
rename from src/objects/lmc/source/evidence/lmc/stars/source/catalogue.json
rename to src/objects/lmc-volume/source/evidence/lmc/stars/source/catalogue.json
diff --git a/src/objects/lmc/source/lens-manifest.json b/src/objects/lmc-volume/source/lens-manifest.json
similarity index 100%
rename from src/objects/lmc/source/lens-manifest.json
rename to src/objects/lmc-volume/source/lens-manifest.json
diff --git a/src/objects/lmc/source/lens-settings-evidence.json b/src/objects/lmc-volume/source/lens-settings-evidence.json
similarity index 100%
rename from src/objects/lmc/source/lens-settings-evidence.json
rename to src/objects/lmc-volume/source/lens-settings-evidence.json
diff --git a/src/objects/lmc/source/lenses.json b/src/objects/lmc-volume/source/lenses.json
similarity index 91%
rename from src/objects/lmc/source/lenses.json
rename to src/objects/lmc-volume/source/lenses.json
index b69d85185a6..df6782fb4a2 100644
--- a/src/objects/lmc/source/lenses.json
+++ b/src/objects/lmc-volume/source/lenses.json
@@ -1,11 +1,11 @@
 {
   "schema": "cssearth-volume-dataset-promotion@1",
-  "id": "lmc",
+  "id": "lmc-volume",
   "defaultDataset": "horalek-widefield",
   "framingRadiusUnits": 5,
   "evidence": {
-    "emissionRecipe": "src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json",
-    "datasetRecipe": "src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json"
+    "emissionRecipe": "src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json",
+    "datasetRecipe": "src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json"
   },
   "datasets": [
     {
diff --git a/src/objects/lmc/source/lenses/horalek-widefield/provenance.json b/src/objects/lmc-volume/source/lenses/horalek-widefield/provenance.json
similarity index 100%
rename from src/objects/lmc/source/lenses/horalek-widefield/provenance.json
rename to src/objects/lmc-volume/source/lenses/horalek-widefield/provenance.json
diff --git a/src/objects/lmc/source/lenses/horalek-widefield/result.json b/src/objects/lmc-volume/source/lenses/horalek-widefield/result.json
similarity index 100%
rename from src/objects/lmc/source/lenses/horalek-widefield/result.json
rename to src/objects/lmc-volume/source/lenses/horalek-widefield/result.json
diff --git a/src/objects/lmc/source/lenses/horalek-widefield/selection.json b/src/objects/lmc-volume/source/lenses/horalek-widefield/selection.json
similarity index 100%
rename from src/objects/lmc/source/lenses/horalek-widefield/selection.json
rename to src/objects/lmc-volume/source/lenses/horalek-widefield/selection.json
diff --git a/src/objects/lmc/source/lenses/vista-infrared/provenance.json b/src/objects/lmc-volume/source/lenses/vista-infrared/provenance.json
similarity index 100%
rename from src/objects/lmc/source/lenses/vista-infrared/provenance.json
rename to src/objects/lmc-volume/source/lenses/vista-infrared/provenance.json
diff --git a/src/objects/lmc/source/lenses/vista-infrared/result.json b/src/objects/lmc-volume/source/lenses/vista-infrared/result.json
similarity index 100%
rename from src/objects/lmc/source/lenses/vista-infrared/result.json
rename to src/objects/lmc-volume/source/lenses/vista-infrared/result.json
diff --git a/src/objects/lmc/source/lenses/vista-infrared/selection.json b/src/objects/lmc-volume/source/lenses/vista-infrared/selection.json
similarity index 100%
rename from src/objects/lmc/source/lenses/vista-infrared/selection.json
rename to src/objects/lmc-volume/source/lenses/vista-infrared/selection.json
diff --git a/src/objects/lmc/source/lenses/wise-wide-infrared/provenance.json b/src/objects/lmc-volume/source/lenses/wise-wide-infrared/provenance.json
similarity index 100%
rename from src/objects/lmc/source/lenses/wise-wide-infrared/provenance.json
rename to src/objects/lmc-volume/source/lenses/wise-wide-infrared/provenance.json
diff --git a/src/objects/lmc/source/lenses/wise-wide-infrared/result.json b/src/objects/lmc-volume/source/lenses/wise-wide-infrared/result.json
similarity index 100%
rename from src/objects/lmc/source/lenses/wise-wide-infrared/result.json
rename to src/objects/lmc-volume/source/lenses/wise-wide-infrared/result.json
diff --git a/src/objects/lmc/source/lenses/wise-wide-infrared/selection.json b/src/objects/lmc-volume/source/lenses/wise-wide-infrared/selection.json
similarity index 100%
rename from src/objects/lmc/source/lenses/wise-wide-infrared/selection.json
rename to src/objects/lmc-volume/source/lenses/wise-wide-infrared/selection.json
diff --git a/src/objects/lmc-volume/source/manifest.json b/src/objects/lmc-volume/source/manifest.json
new file mode 100644
index 00000000000..b77909ebc78
--- /dev/null
+++ b/src/objects/lmc-volume/source/manifest.json
@@ -0,0 +1,3239 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "vista-infrared",
+      "path": ".local/nebula-lab/image-candidates/vista/eso1914a-10k.tif",
+      "origin": "https://www.eso.org/public/images/eso1914a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1914a/",
+      "title": "Large Magellanic Cloud · ESO eso1914a",
+      "credit": "ESO/VMC Survey",
+      "displayCredit": "ESO/VMC Survey",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1914a",
+            "role": "material",
+            "evidence": "labs/nebula/models/image-candidates.json#/targets/0/images/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "vista-infrared",
+      "license": "CC-BY-4.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vista",
+            "evidence": "https://www.eso.org/public/images/eso1914a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "horalek-widefield",
+      "path": ".local/nebula-lab/new-references/iotw2547a.jpg",
+      "origin": "https://noirlab.edu/public/images/iotw2547a/",
+      "sourceUrl": "https://noirlab.edu/public/images/iotw2547a/",
+      "title": "Large Magellanic Cloud · NOIRLab iotw2547a",
+      "credit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
+      "displayCredit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-iotw2547a",
+            "role": "material",
+            "evidence": "labs/nebula/models/image-candidates.json#/targets/0/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "horalek-widefield",
+      "license": "CC-BY-4.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "unresolved",
+            "label": "Petr Horálek",
+            "evidence": "https://noirlab.edu/public/images/iotw2547a/",
+            "reason": "The photograph credits Petr Horálek but does not identify the individual camera."
+          }
+        ]
+      }
+    },
+    {
+      "id": "wise-wide-infrared",
+      "path": ".local/nebula-lab/image-candidates/wise-wide/allwise-color-lmc-24deg-6000.jpg",
+      "origin": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html",
+      "sourceUrl": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html",
+      "title": "Large Magellanic Cloud · AllWISE color mosaic",
+      "credit": "IPAC/NASA; color HiPS by CDS (CNRS/Unistra)",
+      "displayCredit": "IPAC/NASA; color HiPS by CDS (CNRS/Unistra)",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "cds-allwise-color",
+            "role": "material",
+            "evidence": "labs/nebula/models/image-candidates.json#/targets/0/images/2"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "wise-wide-infrared",
+      "license": "ODbL-1.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "wise",
+            "evidence": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html"
+          }
+        ]
+      }
+    },
+    {
+      "id": "density-prior",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/particles/source/provenance.json",
+      "origin": "https://doi.org/10.5061/dryad.1vhhmgr82",
+      "sourceUrl": "https://doi.org/10.5061/dryad.1vhhmgr82",
+      "title": "LMC simulated stellar-density prior",
+      "credit": "Garver, Nidever, Debattista & Deg",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "garver-magellanic-simulation",
+            "role": "method",
+            "evidence": "src/objects/lmc-volume/source/evidence/lmc/particles/source/provenance.json: source archive and snapshot pins; stellar-particle density"
+          },
+          {
+            "catalogueId": "garver-magellanic-model",
+            "role": "method",
+            "evidence": "src/objects/lmc-volume/source/evidence/lmc/particles/source/provenance.json: /source/paper"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "catalogue-stars",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/stars/source/catalogue.json",
+      "origin": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1003",
+      "sourceUrl": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1003",
+      "title": "LMC observed catalogue astrometry and photometry",
+      "credit": "Bonanos et al. (2009); CDS/VizieR",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "bonanos-2009-lmc",
+            "role": "material",
+            "evidence": "src/objects/lmc-volume/source/evidence/lmc/stars/source/catalogue.json: files: ReadMe, table1.dat, table3.dat, refs.dat; measured positions and photometry, conditional modeled depths"
+          }
+        ]
+      },
+      "dependencies": [],
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "swope-1m",
+            "evidence": "https://arxiv.org/abs/0905.1328 — section 2.3.2: table 3 UBVI columns are MCPS; https://arxiv.org/abs/astro-ph/0407006 section 2: Swope 1 m and Great Circle Camera. Preparation consumes B and V, not OGLE or infrared photometry."
+          },
+          {
+            "kind": "facility",
+            "facilityId": "curtis-schmidt",
+            "evidence": "https://arxiv.org/abs/astro-ph/0407006 PDF page 4 / Table 2: MCPS replaces bright-star photometry with Massey where available; https://arxiv.org/abs/astro-ph/0110531 section 2.1: Curtis Schmidt at CTIO. The joined Bonanos rows do not identify individual replacement measurements."
+          },
+          {
+            "kind": "unresolved",
+            "label": "Bonanos literature astrometry and spectral classifications",
+            "evidence": "https://arxiv.org/abs/0905.1328 sections 2.1–2.3; labs/nebula/models/lmc/stars/source/refs.dat",
+            "reason": "Positions and classifications combine literature records; an individual observing telescope has not been established for every retained catalogue row. The Swope and Curtis Schmidt attributions apply to the consumed MCPS B/V photometry."
+          }
+        ]
+      }
+    },
+    {
+      "id": "sky-registration",
+      "path": "src/objects/lmc-volume/source/evidence/image-candidates.json",
+      "origin": "https://noirlab.edu/public/images/noirlab2030a/",
+      "sourceUrl": "https://noirlab.edu/public/images/noirlab2030a/",
+      "title": "LMC shared source registration",
+      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noirlab2030a",
+            "role": "method",
+            "evidence": "src/objects/lmc-volume/source/evidence/image-candidates.json: targets/0/images/*/wcsSource: SMASH astrometric anchor; distinct from authored simulation placement"
+          }
+        ]
+      },
+      "dependencies": []
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-20",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/01-emission-model.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-21",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/02-emission-recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-22",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/03-lens-recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-23",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/04-promotion-recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-24",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/05-depth-density.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-25",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/06-catalogue-stars.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-26",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/07-baseline-horalek-widefield.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-27",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/08-baseline-vista-infrared.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-28",
+      "path": "src/objects/lmc-volume/source/bake-inputs/references/09-baseline-wise-wide-infrared.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "retained-evidence-23",
+      "path": "src/objects/lmc-volume/source/compact-delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-29",
+      "path": "src/objects/lmc-volume/source/compact/emission-field.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-30",
+      "path": "src/objects/lmc-volume/source/compact/envelope.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-31",
+      "path": "src/objects/lmc-volume/source/compact/fit-projection.png",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-32",
+      "path": "src/objects/lmc-volume/source/compact/inputs.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-33",
+      "path": "src/objects/lmc-volume/source/compact/lenses/horalek-widefield/coverage.png",
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+      }
+    },
+    {
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+    {
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+      }
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+      }
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+      }
+    },
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+      }
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+      }
+    },
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+      }
+    },
+    {
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+      "sourceBinding": {
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+      }
+    },
+    {
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+      "sourceBinding": {
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+      }
+    },
+    {
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+      "sourceBinding": {
+        "kind": "local",
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+      }
+    },
+    {
+      "id": "document-365",
+      "path": "src/objects/lmc-volume/source/compact/neutral/slices/z/83.png",
+      "sourceBinding": {
+        "kind": "local",
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+      }
+    },
+    {
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+      "path": "src/objects/lmc-volume/source/compact/neutral/slices/z/84.png",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-367",
+      "path": "src/objects/lmc-volume/source/compact/neutral/slices/z/85.png",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
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+      "path": "src/objects/lmc-volume/source/compact/neutral/slices/z/86.png",
+      "sourceBinding": {
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+      }
+    },
+    {
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+      "path": "src/objects/lmc-volume/source/compact/neutral/slices/z/87.png",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-370",
+      "path": "src/objects/lmc-volume/source/compact/neutral/slices/z/88.png",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-371",
+      "path": "src/objects/lmc-volume/source/compact/prior/density.ktx2",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-372",
+      "path": "src/objects/lmc-volume/source/compact/prior/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-373",
+      "path": "src/objects/lmc-volume/source/compact/prior/volume.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "document-374",
+      "path": "src/objects/lmc-volume/source/compact/stars.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
+      }
+    },
+    {
+      "id": "retained-evidence-21",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/bake.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-375",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/candidates/source/alignment-report.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-376",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-377",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-1",
+      "path": "src/objects/lmc-volume/source/lens-manifest.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/lmc-volume/source/lens-settings-evidence.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-15",
+      "path": "src/objects/lmc-volume/source/lenses.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/lmc-volume/source/lenses/horalek-widefield/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-5",
+      "path": "src/objects/lmc-volume/source/lenses/horalek-widefield/result.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-6",
+      "path": "src/objects/lmc-volume/source/lenses/horalek-widefield/selection.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-8",
+      "path": "src/objects/lmc-volume/source/lenses/vista-infrared/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-9",
+      "path": "src/objects/lmc-volume/source/lenses/vista-infrared/result.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-10",
+      "path": "src/objects/lmc-volume/source/lenses/vista-infrared/selection.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-12",
+      "path": "src/objects/lmc-volume/source/lenses/wise-wide-infrared/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-13",
+      "path": "src/objects/lmc-volume/source/lenses/wise-wide-infrared/result.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-14",
+      "path": "src/objects/lmc-volume/source/lenses/wise-wide-infrared/selection.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-16",
+      "path": "src/objects/lmc-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "retained-evidence-22",
+      "path": "src/objects/lmc-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-17",
+      "path": "src/objects/lmc-volume/source/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-18",
+      "path": "src/objects/lmc-volume/source/recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-19",
+      "path": "src/objects/lmc-volume/source/source.jpg",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noirlab2030a",
+            "role": "reference",
+            "evidence": "src/objects/lmc-volume/source/provenance.json#/checkedSource"
+          }
+        ]
+      },
+      "origin": "https://noirlab.edu/public/images/noirlab2030a/",
+      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
+      "acquisition": "Unchanged publisher-curated AstroPix 3000-pixel JPEG derivative of NOIRLab noirlab2030a, retained for the superseded SMASH comparison. The pinned bytes identify this derivative, not the larger publisher master.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "blanco-4m",
+            "evidence": "https://noirlab.edu/public/images/noirlab2030a/ — publisher-curated mirror https://www.astropix.org/image/noirlab/noirlab2030a identifies Blanco-4m/DECam in g, r, i and z; this historical image is retained as a source document."
+          }
+        ]
+      }
+    },
+    {
+      "id": "document-378",
+      "path": "src/objects/lmc-volume/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "nidever-2019-lmc-smash",
+            "role": "reference",
+            "evidence": "https://arxiv.org/abs/1805.02671"
+          }
+        ]
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/lmc/source/presentation.json b/src/objects/lmc-volume/source/presentation.json
similarity index 89%
rename from src/objects/lmc/source/presentation.json
rename to src/objects/lmc-volume/source/presentation.json
index 7bb657a03f4..88be4d43fa8 100644
--- a/src/objects/lmc/source/presentation.json
+++ b/src/objects/lmc-volume/source/presentation.json
@@ -1,35 +1,35 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "lmc",
+  "objectId": "lmc-volume",
   "name": "Large Magellanic Cloud",
   "defaultDataset": "horalek-widefield",
   "bank": {
-    "path": "src/objects/lmc/prepared/datasets.json"
+    "path": "src/objects/lmc-volume/prepared/datasets.json"
   },
   "recipes": [
     {
       "id": "recipe-1",
-      "path": "src/objects/lmc/source/lenses.json"
+      "path": "src/objects/lmc-volume/source/lenses.json"
     },
     {
       "id": "recipe-2",
-      "path": "src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json"
+      "path": "src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json"
     },
     {
       "id": "recipe-3",
-      "path": "src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json"
+      "path": "src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json"
     },
     {
       "id": "recipe-4",
-      "path": "src/objects/lmc/source/compact/prior/volume.json"
+      "path": "src/objects/lmc-volume/source/compact/prior/volume.json"
     },
     {
       "id": "recipe-5",
-      "path": "src/objects/lmc/source/evidence/lmc/candidates/source/alignment-report.json"
+      "path": "src/objects/lmc-volume/source/evidence/lmc/candidates/source/alignment-report.json"
     },
     {
       "id": "recipe-6",
-      "path": "src/objects/lmc/source/lens-settings-evidence.json"
+      "path": "src/objects/lmc-volume/source/lens-settings-evidence.json"
     }
   ],
   "sharedInputs": [
diff --git a/src/objects/lmc/source/provenance-references.json b/src/objects/lmc-volume/source/provenance-references.json
similarity index 58%
rename from src/objects/lmc/source/provenance-references.json
rename to src/objects/lmc-volume/source/provenance-references.json
index 41faf43b98f..0a01829ac8f 100644
--- a/src/objects/lmc/source/provenance-references.json
+++ b/src/objects/lmc-volume/source/provenance-references.json
@@ -3,42 +3,42 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/lmc/particles/source/provenance.json",
-      "path": "src/objects/lmc/source/evidence/lmc/particles/source/provenance.json",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/particles/source/provenance.json",
       "bytes": 2969
     },
     {
       "originalPath": "labs/nebula/models/lmc/stars/source/catalogue.json",
-      "path": "src/objects/lmc/source/evidence/lmc/stars/source/catalogue.json",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/stars/source/catalogue.json",
       "bytes": 2527
     },
     {
       "originalPath": "labs/nebula/models/image-candidates.json",
-      "path": "src/objects/lmc/source/evidence/image-candidates.json",
+      "path": "src/objects/lmc-volume/source/evidence/image-candidates.json",
       "bytes": 9320
     },
     {
       "originalPath": "labs/nebula/models/lmc/bake.json",
-      "path": "src/objects/lmc/source/evidence/lmc/bake.json",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/bake.json",
       "bytes": 4432
     },
     {
       "originalPath": "labs/nebula/models/lmc/full-density/source/volume.json",
-      "path": "src/objects/lmc/source/compact/prior/volume.json",
+      "path": "src/objects/lmc-volume/source/compact/prior/volume.json",
       "bytes": 1370
     },
     {
       "originalPath": "labs/nebula/models/lmc/envelope/emission-envelope.json",
-      "path": "src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/envelope/emission-envelope.json",
       "bytes": 1291
     },
     {
       "originalPath": "labs/nebula/models/lmc/envelope/finite-datasets.json",
-      "path": "src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/envelope/finite-lenses.json",
       "bytes": 8202
     },
     {
       "originalPath": "labs/nebula/models/lmc/candidates/source/alignment-report.json",
-      "path": "src/objects/lmc/source/evidence/lmc/candidates/source/alignment-report.json",
+      "path": "src/objects/lmc-volume/source/evidence/lmc/candidates/source/alignment-report.json",
       "bytes": 8098
     }
   ]
diff --git a/src/objects/lmc/source/provenance.json b/src/objects/lmc-volume/source/provenance.json
similarity index 100%
rename from src/objects/lmc/source/provenance.json
rename to src/objects/lmc-volume/source/provenance.json
diff --git a/src/objects/lmc/source/recipe.json b/src/objects/lmc-volume/source/recipe.json
similarity index 99%
rename from src/objects/lmc/source/recipe.json
rename to src/objects/lmc-volume/source/recipe.json
index 0585198a6a1..7abd38dd14b 100644
--- a/src/objects/lmc/source/recipe.json
+++ b/src/objects/lmc-volume/source/recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-image-layer-recipe@1",
-  "id": "lmc",
+  "id": "lmc-volume",
   "source": {
     "path": "source.jpg",
     "dimensions": [
diff --git a/src/objects/lmc/source/source.jpg b/src/objects/lmc-volume/source/source.jpg
similarity index 100%
rename from src/objects/lmc/source/source.jpg
rename to src/objects/lmc-volume/source/source.jpg
diff --git a/src/objects/lmc/source/stellar-extent.json b/src/objects/lmc-volume/source/stellar-extent.json
similarity index 95%
rename from src/objects/lmc/source/stellar-extent.json
rename to src/objects/lmc-volume/source/stellar-extent.json
index e563669b485..903f3ec1243 100644
--- a/src/objects/lmc/source/stellar-extent.json
+++ b/src/objects/lmc-volume/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "lmc",
+  "objectId": "lmc-volume",
   "radiusPc": 18500,
   "definition": "Projected radius from the LMC centre of the most distant SMASH detection of its old main-sequence stars, 21 degrees at 50 kpc.",
   "quote": "Very extended stellar populations out to R ~ 21 degrees, or ~18.5 kpc",
diff --git a/src/objects/lmc/README.md b/src/objects/lmc/README.md
index 2082e149b53..30a0a085617 100644
--- a/src/objects/lmc/README.md
+++ b/src/objects/lmc/README.md
@@ -1,50 +1,16 @@
-# Large Magellanic Cloud (LMC)
+# Large Magellanic Cloud
 
-Three published images colour one shared three-dimensional emission model; **Horálek optical is the default**. Each dataset carries the same 242 directional slices (97 x, 80 y, 65 z) and the same 1,042 catalogue stars, so switching datasets changes colour and never geometry. Nothing here measures gas or dust depth.
-
-The shape is a hypothesis with two parts. A broad envelope carries 80.75% of the Horálek image light along the depth distribution of the **Garver et al. stellar simulation**, and 470 fitted detail components sit at the strongest simulation mode along their own sightlines. The LMC has no observational depth tracer in this repository, so, unlike the SMC's ellipsoid, the envelope shape is the simulation's own and untested. Catalogue-star depths are realizations inside that model, not distances.
+Large Magellanic Cloud as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Large Magellanic Cloud volume](../lmc-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Source / dataset | Role and selected input |
-| --- | --- |
-| [Garver, Nidever, Debattista & Deg simulation](https://doi.org/10.5061/dryad.1vhhmgr82) | Stellar-density prior: the envelope's depth distribution and the detail components' line-of-sight modes. |
-| [Horálek optical, iotw2547a](https://noirlab.edu/public/images/iotw2547a/) | 6582 × 4388-pixel visible-light photograph; also the image the emission model was fitted to. Acquisition instrument and exact bands unspecified. |
-| [ESO VISTA, eso1914a](https://www.eso.org/public/images/eso1914a/) | Y/J/Ks near-infrared display; 8954 × 10000 pixels. |
-| [NASA/IPAC AllWISE through CDS](https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html) | W4/W2/W1 false-colour HiPS mosaic; 6000² pixels across 24°, not native detector sampling. |
-| [Bonanos et al. (2009)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1003) | Observed sky positions and Johnson V for 1,042 selected massive stars; their depths are model-contained realizations. |
-| [SMASH, noirlab2030a](https://noirlab.edu/public/images/noirlab2030a/) | Shared sky-registration reference every image is matched to. |
-| [Nidever et al. (2019)](https://arxiv.org/abs/1805.02671) | [Stellar extent](source/stellar-extent.json): LMC stars detected out to R ≈ 21°, about 18.5 kpc. Inside that radius the LMC's caption hides; outside it the caption hangs under the LMC's framing sphere. It marks where stars are still measured, not a boundary. |
-
-Native photographs supply colour after registered star removal.
-
-Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; the search was not exhaustive.
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/lmc.json) cites the position, distance and velocity that place it.
 
 ## Processing
 
-1. **Registration.** Each image keeps its measured sky solution from the pinned [alignment report](source/evidence/lmc/candidates/source/alignment-report.json). The model is placed with the identity placement, which reproduces the registered Horálek corners to 0.000″.
-2. **Emission.** The registered, star-removed Horálek image is smoothed and divided by the integrated simulation column to give an envelope gain, so image brightness scales the envelope but never moves it in depth. The remaining detail is fitted with 470 positive finite components. [`emission-envelope.json`](source/evidence/lmc/envelope/emission-envelope.json) is the recipe; [EMISSION-METHOD.md](../../../labs/nebula/models/lmc/envelope/EMISSION-METHOD.md) explains the method, and the [SMC method note](../../../labs/nebula/models/smc/constrained/EMISSION-METHOD.md) owns the derivation. The fit covers only the registered Horálek footprint (10.06 × 6.74°).
-3. **Datasets.** [`finite-datasets.json`](source/evidence/lmc/envelope/finite-lenses.json) bakes each registered image onto that one geometry with a per-channel tone curve fitted against that dataset's own image ([receipt](source/lens-settings-evidence.json)).
-4. **Delivery.** The [compact inputs](source/compact/inputs.json) carry exactly what a replay needs, and `pnpm prepare:nebulae --if-missing` rebuilds the bank and its atlases from them alone. Each delivered byte's laboratory record is numbered under [`bake-inputs/references/`](source/bake-inputs/references).
-5. **Stars.** Bonanos Table 3 rows with finite V ≤ 16 whose ray lands on a covered footprint pixel are placed at a fixed per-star quantile of the model density. 1,042 are placed; 39 rows outside the Horálek footprint are not. [Star preparation](../../../labs/nebula/models/lmc/stars/README.md) records the selection.
-
-## Evidence
-
-- **Fit.** Projection RMSE 0.03247 after fitting against 0.10458 before. The envelope carries 80.75% of the image light.
-- **Registration.** Of the 40 brightest catalogue stars projected onto the registered Horálek image, 17 fall within 1 px of a photographic peak (median 1.19 px, 22.9″); mirroring gives 1 of 40. Half of that residual is already in the publisher frame.
-- **Datasets against their own images.** After the tone fit, render flux differs from each dataset's own image by Horálek +1.8%, VISTA +16.6% and AllWISE +264%.
-- **App inspection.** Captures from the running application cover the Earth view, an oblique view, both 90° side views, all three dataset switches and stars on and off. The side views show line-of-sight extent rather than a flat sheet.
-- **Replay.** With the laboratory caches moved aside, all 726 regenerated slice textures are byte-identical to the promotion output. The [object descriptor](object.json) names the result and the [prepared inventory](inventory.json) pins it.
-
-![The LMC page with HV 2827, HV 877 and HV 900 ringed and named](evidence/2026-10-01/featured-cepheids.jpg)
-
-A browser capture of this page: the 35 packaged stars of the Cloud draw as dots, and the three largest by measured radius ([Groenewegen 2013](https://arxiv.org/abs/1212.5478)), HV 2827, HV 877 and HV 900, are featured: ringed, named and opened by a click. The rest are plain dots, reachable through search. A Cloud star's dot is gone once the camera is as far from it as the Sun is, so none shows from inside the Milky Way. The SMC features HV 837 and HV 822 the same way.
+1. `pnpm prepare:objects --object=lmc` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts lmc` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- **VISTA and AllWISE are brighter than their own images:** +17% and +264% after fitting. Every dataset shares the one opacity fitted to Horálek, so a tone curve can only dim or recolour inside it. AllWISE's own composite spans about 19 grey levels inside its footprint.
-- The envelope is the simulation's shape hypothesis and the detail components are conditioned on the same simulation; neither is measured gas geometry. The model records `materialGatePassed: false`. The LMC has no depth tracer here to test it.
-- The fit is cut along the Horálek image's bottom edge, and its black point still clips the faint outer halo. The brightest 0.1% of pixels reach only 0.89–0.96 of the image.
-- A violet-blue patch can remain on the western footprint edge, and a small detached knot group appears above the body at oblique and side poses.
-- Faint concentric ripples remain where alpha is still quantized. Detail is bounded by the 384-pixel fit and 128 slabs on the longest axis.
-- Star removal leaves crowded and saturated stars and can remove compact nebular light.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/lmc/inventory.json b/src/objects/lmc/inventory.json
index bbd8a787723..8da79f1256c 100644
--- a/src/objects/lmc/inventory.json
+++ b/src/objects/lmc/inventory.json
@@ -3,567 +3,63 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/horalek-widefield.webp",
+      "filename": "lmc-dataset-horalek-widefield.webp",
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-      "filename": "datasets/vista-infrared.webp",
+      "filename": "lmc-dataset-vista-infrared.webp",
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       "sha256": "a8f1523029e389d604d29d0b2259a390d1da207626afba7e50ac53c3da78a687"
     },
     {
       "location": "public",
-      "filename": "datasets/wise-wide-infrared.webp",
+      "filename": "lmc-dataset-wise-wide-infrared.webp",
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diff --git a/src/objects/lmc/object.json b/src/objects/lmc/object.json
index 94206f81d86..aec374591b2 100644
--- a/src/objects/lmc/object.json
+++ b/src/objects/lmc/object.json
@@ -1,42 +1,97 @@
 {
   "schema": "cssearth-object@2",
   "id": "lmc",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Large Magellanic Cloud",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 154283879074568400
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "LMC",
+      "systemName": "Local Group",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 10228810510,
+      "description": "A galaxy 49,591 parsecs away.",
+      "aliases": [
+        "Nubecula Major",
+        "Large Magellanic Cloud",
+        "Large Milky Cloud"
+      ],
+      "order": 5138,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
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-        533209933280955330000,
-        -1.4303831216834226e+21
+        105965323959178080000,
+        533210010179926950000,
+        -1.430383327971761e+21
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-        0.9788280334299664,
-        0.17973685917567428,
-        0.01768669847817273
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+        0,
+        -0.6013946019733332,
+        -0.5517687595357683,
+        0.3977771559319137,
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-          5.969691017466296
-        ]
-      }
-    },
-    "preparation": {
-      "source": "source/compact-delivery.json"
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 497689932498607700,
+      "bodyRadiusM": 154283879074568370000
     }
   },
   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/lmc/source/content/object.json b/src/objects/lmc/source/content/object.json
new file mode 100644
index 00000000000..57bdebba1e7
--- /dev/null
+++ b/src/objects/lmc/source/content/object.json
@@ -0,0 +1,146 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "lmc",
+  "displayName": "LMC",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "49.59 kpc (\u2212545.1 / +551.1 pc)",
+        "source": {
+          "catalogueId": "publication-pietrzynski2019natur-567-200p",
+          "url": "https://ui.adsabs.harvard.edu/abs/2019Natur.567..200P",
+          "label": "Pietrzynski2019Natur.567..200P: A distance to the Large Magellanic Cloud that is precise to one per cent",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 78.76\u00b0, Dec -69.19\u00b0",
+        "source": {
+          "catalogueId": "publication-vandermarel2014apj-781-121v",
+          "url": "https://ui.adsabs.harvard.edu/abs/2014ApJ...781..121V",
+          "label": "vanderMarel2014ApJ...781..121V: Third-epoch Magellanic Cloud Proper Motions. II. The Large Magellanic Cloud Rotation Field in Three Dimensions",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "membership",
+        "label": "Membership",
+        "value": "Local group, Milky way",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "half-light-radius",
+        "label": "Half-light radius",
+        "value": "2.783 kpc",
+        "source": {
+          "catalogueId": "publication-choi2018apj-869-125c",
+          "url": "https://ui.adsabs.harvard.edu/abs/2018ApJ...869..125C",
+          "label": "Choi2018ApJ...869..125C: SMASHing the LMC: Mapping a Ring-like Stellar Overdensity in the LMC Disk",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "horalek-widefield",
+    "controls": [
+      {
+        "id": "horalek-widefield",
+        "label": "Hor\u00e1lek optical",
+        "thumbnail": "lmc-dataset-horalek-widefield.webp",
+        "volume": {
+          "objectId": "lmc-volume",
+          "datasetId": "horalek-widefield",
+          "surface": "horalek-widefield"
+        },
+        "source": {
+          "id": "lmc-volume-horalek-widefield",
+          "path": "../../lmc-volume/source/manifest.json",
+          "url": "https://noirlab.edu/public/images/iotw2547a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "vista-infrared",
+        "label": "ESO VISTA",
+        "thumbnail": "lmc-dataset-vista-infrared.webp",
+        "volume": {
+          "objectId": "lmc-volume",
+          "datasetId": "vista-infrared",
+          "surface": "vista-infrared"
+        },
+        "source": {
+          "id": "lmc-volume-vista-infrared",
+          "path": "../../lmc-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1914a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "wise-wide-infrared",
+        "label": "NASA AllWISE",
+        "thumbnail": "lmc-dataset-wise-wide-infrared.webp",
+        "volume": {
+          "objectId": "lmc-volume",
+          "datasetId": "wise-wide-infrared",
+          "surface": "wise-wide-infrared"
+        },
+        "source": {
+          "id": "lmc-volume-wise-wide-infrared",
+          "path": "../../lmc-volume/source/manifest.json",
+          "url": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pietrzynski2019Natur.567..200P: A distance to the Large Magellanic Cloud that is precise to one per cent",
+      "href": "https://ui.adsabs.harvard.edu/abs/2019Natur.567..200P"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "vanderMarel2014ApJ...781..121V: Third-epoch Magellanic Cloud Proper Motions. II. The Large Magellanic Cloud Rotation Field in Three Dimensions",
+      "href": "https://ui.adsabs.harvard.edu/abs/2014ApJ...781..121V"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+      "href": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Choi2018ApJ...869..125C: SMASHing the LMC: Mapping a Ring-like Stellar Overdensity in the LMC Disk",
+      "href": "https://ui.adsabs.harvard.edu/abs/2018ApJ...869..125C"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://ui.adsabs.harvard.edu/abs/2019Natur.567..200P",
+      "credit": "Pietrzynski2019Natur.567..200P: A distance to the Large Magellanic Cloud that is precise to one per cent"
+    }
+  }
+}
diff --git a/src/objects/lmc/source/manifest.json b/src/objects/lmc/source/manifest.json
index a39fe64e418..0d616a44bd5 100644
--- a/src/objects/lmc/source/manifest.json
+++ b/src/objects/lmc/source/manifest.json
@@ -1,3239 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "vista-infrared",
-      "path": ".local/nebula-lab/image-candidates/vista/eso1914a-10k.tif",
-      "origin": "https://www.eso.org/public/images/eso1914a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1914a/",
-      "title": "Large Magellanic Cloud · ESO eso1914a",
-      "credit": "ESO/VMC Survey",
-      "displayCredit": "ESO/VMC Survey",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso1914a",
-            "role": "material",
-            "evidence": "labs/nebula/models/image-candidates.json#/targets/0/images/0"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "vista-infrared",
-      "license": "CC-BY-4.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "vista",
-            "evidence": "https://www.eso.org/public/images/eso1914a/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "horalek-widefield",
-      "path": ".local/nebula-lab/new-references/iotw2547a.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://noirlab.edu/public/images/iotw2547a/",
-      "sourceUrl": "https://noirlab.edu/public/images/iotw2547a/",
-      "title": "Large Magellanic Cloud · NOIRLab iotw2547a",
-      "credit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
-      "displayCredit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "noirlab-iotw2547a",
-            "role": "material",
-            "evidence": "labs/nebula/models/image-candidates.json#/targets/0/images/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "horalek-widefield",
+      "credit": "NOIRLab/NSF/AURA/P. Hor\u00e1lek (Institute of Physics in Opava); the default dataset's picture as the Large Magellanic Cloud bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "Petr Horálek",
-            "evidence": "https://noirlab.edu/public/images/iotw2547a/",
-            "reason": "The photograph credits Petr Horálek but does not identify the individual camera."
-          }
-        ]
-      }
-    },
-    {
-      "id": "wise-wide-infrared",
-      "path": ".local/nebula-lab/image-candidates/wise-wide/allwise-color-lmc-24deg-6000.jpg",
-      "origin": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html",
-      "sourceUrl": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html",
-      "title": "Large Magellanic Cloud · AllWISE color mosaic",
-      "credit": "IPAC/NASA; color HiPS by CDS (CNRS/Unistra)",
-      "displayCredit": "IPAC/NASA; color HiPS by CDS (CNRS/Unistra)",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "cds-allwise-color",
-            "role": "material",
-            "evidence": "labs/nebula/models/image-candidates.json#/targets/0/images/2"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "wise-wide-infrared",
-      "license": "ODbL-1.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "wise",
-            "evidence": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html"
-          }
-        ]
-      }
-    },
-    {
-      "id": "density-prior",
-      "path": "src/objects/lmc/source/evidence/lmc/particles/source/provenance.json",
-      "origin": "https://doi.org/10.5061/dryad.1vhhmgr82",
-      "sourceUrl": "https://doi.org/10.5061/dryad.1vhhmgr82",
-      "title": "LMC simulated stellar-density prior",
-      "credit": "Garver, Nidever, Debattista & Deg",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "garver-magellanic-simulation",
-            "role": "method",
-            "evidence": "src/objects/lmc/source/evidence/lmc/particles/source/provenance.json: source archive and snapshot pins; stellar-particle density"
-          },
-          {
-            "catalogueId": "garver-magellanic-model",
-            "role": "method",
-            "evidence": "src/objects/lmc/source/evidence/lmc/particles/source/provenance.json: /source/paper"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "catalogue-stars",
-      "path": "src/objects/lmc/source/evidence/lmc/stars/source/catalogue.json",
-      "origin": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1003",
-      "sourceUrl": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/138/1003",
-      "title": "LMC observed catalogue astrometry and photometry",
-      "credit": "Bonanos et al. (2009); CDS/VizieR",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "bonanos-2009-lmc",
-            "role": "material",
-            "evidence": "src/objects/lmc/source/evidence/lmc/stars/source/catalogue.json: files: ReadMe, table1.dat, table3.dat, refs.dat; measured positions and photometry, conditional modeled depths"
-          }
-        ]
-      },
-      "dependencies": [],
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "swope-1m",
-            "evidence": "https://arxiv.org/abs/0905.1328 — section 2.3.2: table 3 UBVI columns are MCPS; https://arxiv.org/abs/astro-ph/0407006 section 2: Swope 1 m and Great Circle Camera. Preparation consumes B and V, not OGLE or infrared photometry."
-          },
-          {
-            "kind": "facility",
-            "facilityId": "curtis-schmidt",
-            "evidence": "https://arxiv.org/abs/astro-ph/0407006 PDF page 4 / Table 2: MCPS replaces bright-star photometry with Massey where available; https://arxiv.org/abs/astro-ph/0110531 section 2.1: Curtis Schmidt at CTIO. The joined Bonanos rows do not identify individual replacement measurements."
-          },
-          {
-            "kind": "unresolved",
-            "label": "Bonanos literature astrometry and spectral classifications",
-            "evidence": "https://arxiv.org/abs/0905.1328 sections 2.1–2.3; labs/nebula/models/lmc/stars/source/refs.dat",
-            "reason": "Positions and classifications combine literature records; an individual observing telescope has not been established for every retained catalogue row. The Swope and Curtis Schmidt attributions apply to the consumed MCPS B/V photometry."
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/lmc-volume/source/manifest.json)."
       }
-    },
-    {
-      "id": "sky-registration",
-      "path": "src/objects/lmc/source/evidence/image-candidates.json",
-      "origin": "https://noirlab.edu/public/images/noirlab2030a/",
-      "sourceUrl": "https://noirlab.edu/public/images/noirlab2030a/",
-      "title": "LMC shared source registration",
-      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
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-            "catalogueId": "noirlab-noirlab2030a",
-            "role": "method",
-            "evidence": "src/objects/lmc/source/evidence/image-candidates.json: targets/0/images/*/wcsSource: SMASH astrometric anchor; distinct from authored simulation placement"
-          }
-        ]
-      },
-      "dependencies": []
     }
   ],
   "documents": [
     {
-      "id": "document-20",
-      "path": "src/objects/lmc/source/bake-inputs/references/01-emission-model.json",
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-      "path": "src/objects/lmc/source/bake-inputs/references/07-baseline-horalek-widefield.json",
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-      "id": "document-371",
-      "path": "src/objects/lmc/source/compact/prior/density.ktx2",
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-      "id": "document-373",
-      "path": "src/objects/lmc/source/compact/prior/volume.json",
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-        "reason": "Delivered replay input. These bytes regenerate the installed dataset bank through prepare:nebulae; source/compact/inputs.json pins each one and source/bake-inputs/references records the laboratory record behind it."
-      }
-    },
-    {
-      "id": "document-374",
-      "path": "src/objects/lmc/source/compact/stars.json.gz",
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-      }
-    },
-    {
-      "id": "retained-evidence-21",
-      "path": "src/objects/lmc/source/evidence/lmc/bake.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "document-375",
-      "path": "src/objects/lmc/source/evidence/lmc/candidates/source/alignment-report.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
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-    {
-      "id": "document-376",
-      "path": "src/objects/lmc/source/evidence/lmc/envelope/emission-envelope.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "document-377",
-      "path": "src/objects/lmc/source/evidence/lmc/envelope/finite-lenses.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "document-1",
-      "path": "src/objects/lmc/source/lens-manifest.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-2",
-      "path": "src/objects/lmc/source/lens-settings-evidence.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-15",
-      "path": "src/objects/lmc/source/lenses.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-4",
-      "path": "src/objects/lmc/source/lenses/horalek-widefield/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-5",
-      "path": "src/objects/lmc/source/lenses/horalek-widefield/result.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-6",
-      "path": "src/objects/lmc/source/lenses/horalek-widefield/selection.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-8",
-      "path": "src/objects/lmc/source/lenses/vista-infrared/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-9",
-      "path": "src/objects/lmc/source/lenses/vista-infrared/result.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-10",
-      "path": "src/objects/lmc/source/lenses/vista-infrared/selection.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-12",
-      "path": "src/objects/lmc/source/lenses/wise-wide-infrared/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-13",
-      "path": "src/objects/lmc/source/lenses/wise-wide-infrared/result.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-14",
-      "path": "src/objects/lmc/source/lenses/wise-wide-infrared/selection.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-16",
-      "path": "src/objects/lmc/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "retained-evidence-22",
-      "path": "src/objects/lmc/source/provenance-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "document-17",
-      "path": "src/objects/lmc/source/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-18",
-      "path": "src/objects/lmc/source/recipe.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-19",
-      "path": "src/objects/lmc/source/source.jpg",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "noirlab-noirlab2030a",
-            "role": "reference",
-            "evidence": "src/objects/lmc/source/provenance.json#/checkedSource"
-          }
-        ]
-      },
-      "origin": "https://noirlab.edu/public/images/noirlab2030a/",
-      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
-      "acquisition": "Unchanged publisher-curated AstroPix 3000-pixel JPEG derivative of NOIRLab noirlab2030a, retained for the superseded SMASH comparison. The pinned bytes identify this derivative, not the larger publisher master.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "blanco-4m",
-            "evidence": "https://noirlab.edu/public/images/noirlab2030a/ — publisher-curated mirror https://www.astropix.org/image/noirlab/noirlab2030a identifies Blanco-4m/DECam in g, r, i and z; this historical image is retained as a source document."
-          }
-        ]
-      }
-    },
-    {
-      "id": "document-378",
-      "path": "src/objects/lmc/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "nidever-2019-lmc-smash",
-            "role": "reference",
-            "evidence": "https://arxiv.org/abs/1805.02671"
-          }
-        ]
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/lmc/source/preparation/navigation.json b/src/objects/lmc/source/preparation/navigation.json
new file mode 100644
index 00000000000..bb48827f21e
--- /dev/null
+++ b/src/objects/lmc/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "lmc",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/lmc/source/presentation/context.png b/src/objects/lmc/source/presentation/context.png
new file mode 100644
index 00000000000..973193ee8c2
Binary files /dev/null and b/src/objects/lmc/source/presentation/context.png differ
diff --git a/src/objects/lmc/source/presentation/solar-system.json b/src/objects/lmc/source/presentation/solar-system.json
new file mode 100644
index 00000000000..e3c1176e8ef
--- /dev/null
+++ b/src/objects/lmc/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "lmc",
+  "displayName": "Large Magellanic Cloud",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 1.542838790745684e+17,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/lmc/text.json b/src/objects/lmc/text.json
new file mode 100644
index 00000000000..0be5a6ab632
--- /dev/null
+++ b/src/objects/lmc/text.json
@@ -0,0 +1,72 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "lmc",
+  "card": {
+    "text": "A galaxy 49,591 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-pietrzynski2019natur-567-200p",
+        "url": "https://ui.adsabs.harvard.edu/abs/2019Natur.567..200P",
+        "label": "Pietrzynski2019Natur.567..200P: A distance to the Large Magellanic Cloud that is precise to one per cent",
+        "checked": "2026-10-01",
+        "locator": "distance: 49.59 kpc (−545.1 / +551.1 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 49,591 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-pietrzynski2019natur-567-200p",
+        "url": "https://ui.adsabs.harvard.edu/abs/2019Natur.567..200P",
+        "label": "Pietrzynski2019Natur.567..200P: A distance to the Large Magellanic Cloud that is precise to one per cent",
+        "checked": "2026-10-01",
+        "locator": "distance: 49.59 kpc (−545.1 / +551.1 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "horalek-widefield": {
+      "title": "Petr Horálek’s visible-light LMC",
+      "detail": "6582 × 4388 px",
+      "summary": "Optical photograph colours on an image-fitted emission model; gas and dust depth are not measured.",
+      "sources": [
+        {
+          "catalogueId": "noirlab-iotw2547a",
+          "url": "https://noirlab.edu/public/images/iotw2547a/",
+          "label": "Large Magellanic Cloud · NOIRLab iotw2547a; NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
+          "checked": "2026-10-01",
+          "locator": "Large Magellanic Cloud · NOIRLab iotw2547a"
+        }
+      ]
+    },
+    "vista-infrared": {
+      "title": "LMC in near infrared",
+      "detail": "8954 × 10000 px",
+      "summary": "Near-infrared false colour on an image-fitted emission model; gas and dust depth are not measured.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1914a",
+          "url": "https://www.eso.org/public/images/eso1914a/",
+          "label": "Large Magellanic Cloud · ESO eso1914a; ESO/VMC Survey",
+          "checked": "2026-10-01",
+          "locator": "Large Magellanic Cloud · ESO eso1914a"
+        }
+      ]
+    },
+    "wise-wide-infrared": {
+      "title": "LMC in WISE infrared",
+      "detail": "6000 × 6000 px",
+      "summary": "AllWISE infrared false colour on an image-fitted emission model; gas and dust depth are not measured.",
+      "sources": [
+        {
+          "catalogueId": "cds-allwise-color",
+          "url": "https://irsa.ipac.caltech.edu/onlinehelp/wise/wise/overview.html",
+          "label": "Large Magellanic Cloud · AllWISE color mosaic; IPAC/NASA; color HiPS by CDS (CNRS/Unistra)",
+          "checked": "2026-10-01",
+          "locator": "Large Magellanic Cloud · AllWISE color mosaic"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/local-group/README.md b/src/objects/local-group/README.md
index 8640a0aacdc..ec6ddd57a88 100644
--- a/src/objects/local-group/README.md
+++ b/src/objects/local-group/README.md
@@ -29,6 +29,7 @@ The [source manifest](source/manifest.json) lists every input and authored recor
 - Host-assigned, numerical-action, redshift/Hubble-law distances, confirmed clusters and false positives are excluded. A blank distance method stays `unspecified`.
 - Membership uses 143 explicit name bindings to the updated table's 144 rows; Canis Major has no matching LVDB row. No coordinates are used to guess a match. G/A/L mean Milky Way, M31 or other Local Group association and N a nearby neighbour; mixed codes such as G/L keep the uncertainty. An unmatched field galaxy stays `uncertain`.
 - Half-light radius is the projected **semi-major radius** at the adopted distance. Its errors carry angular-fit errors only. It is not a diameter or a hard edge.
+- The group's own marker, shown among the galaxy clusters from 3 to 10 Mpc out, sits at the mid-point of the vector connecting the Milky Way and M31, where [McConnachie (2012), AJ 144, 4](https://arxiv.org/abs/1204.1562) places the Local Group's barycentre (Table 2, notes to columns 8 to 10). It is computed from this repository's positions of the Galactic centre and M31, so the paper's adopted M31 modulus (24.47) is not used. It is framed at the paper's zero-velocity surface radius, 1060 ± 70 kpc (section 3). The [astronomy record](../../../packages/astronomy/data/bodies/local-group.json) holds the values.
 - The four detailed galaxies have authored arrival framing radii of 25, 9, 5 and 4 kpc (M31, M33, LMC, SMC). These are not measured galaxy radii.
 
 The command also writes `prepared/display-sample.json`. The [sampling recipe](source/presentation.json) picks 48 catalogue-only Local Group galaxies from 150 kpc cells, weighted by square-root counts. Dots start appearing at 120 Mpc and are fully visible at 30 Mpc; names and ovals follow between 40 and 12 Mpc, with at most twelve labels. Catalogue-only entries stay navigation destinations whether or not they are sampled.
@@ -37,6 +38,14 @@ The command also writes `prepared/display-sample.json`. The [sampling recipe](so
 
 The [catalogue tests](../../../packages/bake/src/galaxy-catalog/galaxy-catalog.test.ts) regenerate the catalogue, display sample and receipt and compare them byte for byte. They check coordinate axes independently, keep the four detailed galaxies' published directions and distances, and reject corrupted sources, coordinate-frame changes, radius-based membership and lost candidates. A pypdf 5.9.0 extraction checks the Table 1 transcription against the original PDF. These checks establish derivation, not visual or scientific acceptance.
 
+![The Local Group's marker between the Virgo and Fornax clusters, 100 Mpc out](evidence/2026-10-01/local-group-marker.jpg)
+
+A headless capture of this version's Nearby Universe page on the local preview: the Local Group's marker and name stand with the two clusters that have packages.
+
+![Before: the same view named seven clusters from catalogue rows, with no Local Group](evidence/2026-10-01/before-catalogue-labels.jpg)
+
+The version before this one, same view: five clusters named from catalogue rows alone (Centaurus, Norma and three out of frame) and no Local Group. Those five have no package, so they are no longer named or listed.
+
 ## Known problems
 
 - The display sample is incomplete by design and is not a density, completeness or mass map.
diff --git a/src/objects/local-group/evidence/2026-10-01/before-catalogue-labels.jpg b/src/objects/local-group/evidence/2026-10-01/before-catalogue-labels.jpg
new file mode 100644
index 00000000000..4200f0c2d9c
Binary files /dev/null and b/src/objects/local-group/evidence/2026-10-01/before-catalogue-labels.jpg differ
diff --git a/src/objects/local-group/evidence/2026-10-01/local-group-marker.jpg b/src/objects/local-group/evidence/2026-10-01/local-group-marker.jpg
new file mode 100644
index 00000000000..32233d6d839
Binary files /dev/null and b/src/objects/local-group/evidence/2026-10-01/local-group-marker.jpg differ
diff --git a/src/objects/local-group/evidence/2026-10-01/m31-standard-card.jpg b/src/objects/local-group/evidence/2026-10-01/m31-standard-card.jpg
new file mode 100644
index 00000000000..90ebf03a6d8
Binary files /dev/null and b/src/objects/local-group/evidence/2026-10-01/m31-standard-card.jpg differ
diff --git a/src/objects/local-group/object.json b/src/objects/local-group/object.json
index 00897a77385..f9215ff1cbd 100644
--- a/src/objects/local-group/object.json
+++ b/src/objects/local-group/object.json
@@ -4,8 +4,6 @@
   "type": "galaxy-catalog",
   "properties": {
     "overview": {
-      "name": "Local Group",
-      "description": "Our galaxy group, including the Milky Way, Andromeda and their neighboring galaxies.",
       "order": 2,
       "zoom": {
         "enter": {
@@ -35,6 +33,39 @@
     },
     "preparation": {
       "source": "source/catalogue.json"
+    },
+    "catalog": {
+      "name": "Local Group",
+      "systemName": "Galaxy clusters",
+      "classification": "galaxy-cluster",
+      "classificationLabel": "Galaxy group",
+      "color": "#9a9a9a",
+      "distanceAu": 79648329870.0,
+      "description": "Our galaxy group, including the Milky Way, Andromeda and their neighboring galaxies.",
+      "order": 5154,
+      "context": {}
+    },
+    "worldFrame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        8.839012629123569e+21,
+        1.5574334255884387e+21,
+        7.837010763892267e+21
+      ],
+      "presentationToReference": [
+        0,
+        1,
+        0,
+        1,
+        0,
+        0,
+        0,
+        0,
+        1
+      ],
+      "metersPerUnit": 3.2708182363808494e+22,
+      "bodyRadiusM": 3.2708182363808494e+22
     }
   },
   "prepared": {
diff --git a/src/objects/m1-volume/README.md b/src/objects/m1-volume/README.md
new file mode 100644
index 00000000000..cd1e231dd04
--- /dev/null
+++ b/src/objects/m1-volume/README.md
@@ -0,0 +1,46 @@
+# Crab Nebula (M1)
+
+Six spectral datasets share expansion-inferred ejecta and an authored pulsar-wind model. **Hubble optical is the default.** Display color and opacity do not measure gas or dust density.
+
+## Sources
+
+| Source / dataset | Selected observation and scope |
+| --- | --- |
+| [Hubble optical](https://esahubble.org/images/heic0515a/) | WFPC2 optical-line mosaic, 1999–2002; 3864² pixels, 6.41′ square. |
+| [Webb infrared](https://esawebb.org/images/weic2326a/) | NIRCam/MIRI, 2022–2023; 4000 × 3483 pixels, 5.47′ × 4.76′. |
+| [Webb components](https://esawebb.org/images/weic2417a/) | Derived synchrotron/sulfur/dust display from the same observations; 2958 × 2569 pixels. The registered field is about 5.47′ × 4.75′ after an explicit 2.67% scale correction. |
+| [Spitzer infrared](https://esahubble.org/images/potw1720c/) | MIPS 24 µm attribution comes from the companion release; exposure date unspecified. |
+| [VLA radio](https://esahubble.org/images/potw1720b/) | Approximately 3 GHz; 2012 observations with older large-scale template information. |
+| [Chandra X-rays](https://esahubble.org/images/potw1720f/) | ACIS composite; companion release spans 2000–2013, exact stack/passband unspecified. |
+| [SITELLE ejecta](https://doi.org/10.1093/mnras/staa4046) | 416,573 released 2016 emission samples; depth assumes an expansion law and 2,000 pc. |
+
+The last three images share a 5290²-pixel, 8.83′ publisher grid transferred through a separately registered 2017 Hubble bridge. They have no independent field-star registration. Infrared, radio and X-ray colors are representational; compact nonstellar emission is preserved.
+
+The adopted **2,000 pc** scale follows [Martin et al. (2021), §3.4](https://doi.org/10.1093/mnras/staa4046), not a new distance fit; its cited 1.7–2.4 kpc range is not a statistical error. [Lin et al. (2023)](https://arxiv.org/abs/2306.01617) report the alternative VLBI pulsar distance of 1.90 +0.22/−0.18 kpc. The [stellar field](source/stellar-field.json) supplies 280 Gaia sources within an authored 50 pc sphere, G < 16, using Bailer-Jones distance estimates and retained uncertainty intervals. One named pulsar keeps its original conditional depth and spectral appearance: 281 displayed points.
+
+Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
+
+## Evidence
+
+- Recorded app checks cover the catalogue field, projection and star toggle; evidence context states their version and limits.
+- The [object descriptor](object.json) pins the installed bank whose provenance identifies compiler result `3fac3e884fb5…`. The [delivery request](source/delivery.json) pins preparation inputs and retains the older accepted-lab reference separately. This documentation review did not perform a cold replay.
+- [Historical processing evidence](../../../labs/nebula/models/m1/processing-evidence.json) separates stellar registration, native pixel accounting and projected-signal checks. These establish their recorded processing behavior, not physical depth or current material acceptance.
+
+## Known problems
+
+- Image color repeated through depth, softened filaments and oblique glow remain. Trials that lost the front view or created beads were rejected; shipping this version does not resolve that material failure.
+- Expansion may be nonuniform; smoothing, diffuse interior, jet lengths and strengths remain conditional. The northern ejecta-jet arrays were not acquired.
+- Unequal epochs, footprints and PSFs prevent a calibrated multiband comparison. Missing image coverage is not absent emission; no extinction, dust-density or relativistic radiative-transfer solution is claimed.
+
+<details>
+<summary>Methods and historical comparisons</summary>
+
+The [fixed processing account](../../../labs/nebula/models/m1/README.md) preserves the earlier result identities and failed material trials. [Physical evidence](../../../labs/nebula/models/m1/physical-evidence.json) distinguishes SITELLE measurements, Ng–Romani torus parameters and authored terms; the [source dossier](../../../labs/nebula/models/m1/source-dossier.json) preserves registration, epochs and alternatives. General preparation belongs in the [nebula guide](../../../docs/nebulae/README.md).
+
+</details>
+
+## Compact delivery inputs
+
+The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
+
+Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
diff --git a/src/objects/m1-volume/inventory.json b/src/objects/m1-volume/inventory.json
new file mode 100644
index 00000000000..d88bd064fee
--- /dev/null
+++ b/src/objects/m1-volume/inventory.json
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+{
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+}
diff --git a/src/objects/m1/investigations.json b/src/objects/m1-volume/investigations.json
similarity index 96%
rename from src/objects/m1/investigations.json
rename to src/objects/m1-volume/investigations.json
index 66f9f9f44eb..7c207417c8d 100644
--- a/src/objects/m1/investigations.json
+++ b/src/objects/m1-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "m1",
+  "objectId": "m1-volume",
   "entries": [
     {
       "id": "dataset-hubble-optical",
@@ -8,7 +8,7 @@
       "status": "included",
       "finding": "Default WFPC2 optical-line display, 3864² pixels and 6.41 arcmin square; the 1999–2002 mosaic supplies registered color, not calibrated gas density. Native NOX accounting is a processing check.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/observations.json"
       ]
@@ -19,7 +19,7 @@
       "status": "included",
       "finding": "NIRCam/MIRI display from 2022–2023; 52 direct stellar identities and 18 held-out checks give 0.135 arcsec relative RMS. Unequal PSFs and mixed bands prevent treating RGB as a calibrated spectral cube.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/observations.json"
       ]
@@ -30,7 +30,7 @@
       "status": "included",
       "finding": "Derived synchrotron/sulfur/dust display shares the Webb exposures. Seventy inspected stellar identities support an explicit +2.67 percent scale correction; 24 held-out checks give 0.152 arcsec RMS. The corrected field is approximately 5.47 by 4.75 arcmin; compact component emission is preserved.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/observations.json"
       ]
@@ -41,7 +41,7 @@
       "status": "included",
       "finding": "MIPS 24 micrometre attribution is from the linked CXC companion metadata. The 5290² outreach raster inherits the 2017 Hubble bridge grid with no independent stellar matches; exposure date and final PSF are unspecified, native compact emission is preserved.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/observations.json"
       ]
@@ -52,7 +52,7 @@
       "status": "included",
       "finding": "Approximately 3 GHz VLA display; the parent map combines 2012 observations and an older large-scale template. Its 5290² publisher grid inherits the Hubble bridge. Radio knots are not optical field stars and no calibrated flux is recovered.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/observations.json"
       ]
@@ -63,7 +63,7 @@
       "status": "included",
       "finding": "ACIS false-color display on the same publisher grid; the companion release spans 2000–2013 but exact stack and passband are unspecified. Torus/jet emission is preserved and separately weighted on the conditional wind model; no independent X-ray field-star registration.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/observations.json"
       ]
@@ -74,8 +74,8 @@
       "status": "included",
       "finding": "280 Gaia sources in an authored 50 pc sphere, G < 16; one explicitly retained Crab pulsar gives 281 points. The pulsar keeps its separate conditional depth and dataset-dependent appearance. Actual catalogue source IDs, median distances and uncertainty intervals are retained. Sphere, quality cuts, budget, brightness response and fade are display selections, not a membership survey; Cardiel BP-RP display color uses a neutral fallback outside its valid range.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/stellar-field.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/delivery.json",
         "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
         "https://arxiv.org/abs/2012.05220",
         "https://arxiv.org/abs/2107.08734"
@@ -135,7 +135,7 @@
       "finding": "The reported 1.90 +0.22/-0.18 kpc is consistent with but does not replace the original SITELLE 2 kpc conversion. Its pointing centres are not measured source positions.",
       "evidence": [
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m1/source-dossier.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1/source/nebula.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m1-volume/source/nebula.json",
         "https://arxiv.org/abs/2306.01617"
       ],
       "revisitWhen": "Recompute every physical source transform and uncertainty consistently if adopting the VLBI scale."
diff --git a/src/objects/m1-volume/object.json b/src/objects/m1-volume/object.json
new file mode 100644
index 00000000000..232a3279c01
--- /dev/null
+++ b/src/objects/m1-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "m1-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        6342260538817668000,
+        56859423001578635000,
+        23134959365503853000
+      ],
+      "localToReferenceXyzw": [
+        0.031045928829824782,
+        0.5582208269556465,
+        0.8278320620053893,
+        0.04604058831023959
+      ],
+      "metersPerUnit": 299195741400000,
+      "boundsUnits": {
+        "min": [
+          -183.49862979538614,
+          -172.9527315312835,
+          -165.92213268854837
+        ],
+        "max": [
+          183.49862979538614,
+          172.9527315312835,
+          165.92213268854837
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/delivery.json"
+    },
+    "host": "m1"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/m1/source/bake-inputs/references/01-chandra-xray-grid-transfer.json b/src/objects/m1-volume/source/bake-inputs/references/01-chandra-xray-grid-transfer.json
similarity index 100%
rename from src/objects/m1/source/bake-inputs/references/01-chandra-xray-grid-transfer.json
rename to src/objects/m1-volume/source/bake-inputs/references/01-chandra-xray-grid-transfer.json
diff --git a/src/objects/m1/source/bake-inputs/references/02-compiler.json b/src/objects/m1-volume/source/bake-inputs/references/02-compiler.json
similarity index 98%
rename from src/objects/m1/source/bake-inputs/references/02-compiler.json
rename to src/objects/m1-volume/source/bake-inputs/references/02-compiler.json
index 3cef3b7673b..0a2518941a2 100644
--- a/src/objects/m1/source/bake-inputs/references/02-compiler.json
+++ b/src/objects/m1-volume/source/bake-inputs/references/02-compiler.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-compiler@1",
-  "id": "m1",
+  "id": "m1-volume",
   "label": "Crab · M1",
   "observationRecipe": "labs/nebula/models/m1/observations.json",
   "observationCatalogue": ".local/nebula-lab/observations/m1/observations.json",
diff --git a/src/objects/m1/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json b/src/objects/m1-volume/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json
similarity index 100%
rename from src/objects/m1/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json
rename to src/objects/m1-volume/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json
diff --git a/src/objects/m1/source/bake-inputs/references/04-observation-structures.json b/src/objects/m1-volume/source/bake-inputs/references/04-observation-structures.json
similarity index 100%
rename from src/objects/m1/source/bake-inputs/references/04-observation-structures.json
rename to src/objects/m1-volume/source/bake-inputs/references/04-observation-structures.json
diff --git a/src/objects/m1/source/bake-inputs/references/05-observations.json b/src/objects/m1-volume/source/bake-inputs/references/05-observations.json
similarity index 96%
rename from src/objects/m1/source/bake-inputs/references/05-observations.json
rename to src/objects/m1-volume/source/bake-inputs/references/05-observations.json
index 9bff7367db1..21344b5ed84 100644
--- a/src/objects/m1/source/bake-inputs/references/05-observations.json
+++ b/src/objects/m1-volume/source/bake-inputs/references/05-observations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-observation-recipe@1",
-  "id": "m1",
+  "id": "m1-volume",
   "referenceId": "hubble-optical",
   "frame": {
     "width": 1024,
@@ -53,8 +53,8 @@
           22.0152411
         ],
         "scaleDeg": [
-          -0.0000276551527063,
-          0.0000276381692778
+          -2.76551527063e-05,
+          2.76381692778e-05
         ],
         "rotationDeg": 0
       },
@@ -103,8 +103,8 @@
           22.016661852311525
         ],
         "scaleDeg": [
-          -0.000008671937118724234,
-          0.000008671937118724234
+          -8.671937118724234e-06,
+          8.671937118724234e-06
         ],
         "rotationDeg": -2.100000000000001
       },
@@ -153,8 +153,8 @@
           22.01633447322993
         ],
         "scaleDeg": [
-          -0.000030004350534238327,
-          0.000030004350534238327
+          -3.0004350534238327e-05,
+          3.0004350534238327e-05
         ],
         "rotationDeg": -1.9200000000000035
       },
@@ -211,8 +211,8 @@
           22.0151236394
         ],
         "scaleDeg": [
-          -0.0000278194934801,
-          0.0000278194934801
+          -2.78194934801e-05,
+          2.78194934801e-05
         ],
         "rotationDeg": 0.4999999999999996
       },
@@ -276,8 +276,8 @@
           22.0151236394
         ],
         "scaleDeg": [
-          -0.0000278194934801,
-          0.0000278194934801
+          -2.78194934801e-05,
+          2.78194934801e-05
         ],
         "rotationDeg": 0.4999999999999996
       },
@@ -341,8 +341,8 @@
           22.0151236394
         ],
         "scaleDeg": [
-          -0.0000278194934801,
-          0.0000278194934801
+          -2.78194934801e-05,
+          2.78194934801e-05
         ],
         "rotationDeg": 0.4999999999999996
       },
@@ -396,8 +396,8 @@
           22.0151236394
         ],
         "scaleDeg": [
-          -0.0000278194934801,
-          0.0000278194934801
+          -2.78194934801e-05,
+          2.78194934801e-05
         ],
         "rotationDeg": 0.4999999999999996
       },
diff --git a/src/objects/m1/source/bake-inputs/references/06-physical-evidence.json b/src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json
similarity index 100%
rename from src/objects/m1/source/bake-inputs/references/06-physical-evidence.json
rename to src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json
diff --git a/src/objects/m1/source/bake-inputs/references/07-sampled.json b/src/objects/m1-volume/source/bake-inputs/references/07-sampled.json
similarity index 92%
rename from src/objects/m1/source/bake-inputs/references/07-sampled.json
rename to src/objects/m1-volume/source/bake-inputs/references/07-sampled.json
index 0dbd9069c8c..bb2cc77003a 100644
--- a/src/objects/m1/source/bake-inputs/references/07-sampled.json
+++ b/src/objects/m1-volume/source/bake-inputs/references/07-sampled.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-sampled-nebula@2",
-  "id": "m1",
+  "id": "m1-volume",
   "centerIcrsDegrees": [
     83.6334511837,
     22.0151236394
@@ -184,11 +184,11 @@
       "path": ".local/nebula-lab/intake/m1/physical/3dmap_XYZvel.fits",
       "bytes": 6670080
     },
-    "rawZVelocityCorrelation": "Paired rows have identical XYZ values; radial velocity = -1116.0011622611532 \u00d7 rawZ km/s.",
+    "rawZVelocityCorrelation": "Paired rows have identical XYZ values; radial velocity = -1116.0011622611532 × rawZ km/s.",
     "internalCoordinateUncertaintyArcsec": 0.4,
     "unimplemented": "The complete 7.6 arcmin extended PWN lies beyond current selected image/field coverage. The fitted interior diffuse component has authored spatial support, not measured continuum depth; no calibrated radiative transfer."
   },
-  "resolutionNote": "SITELLE native sampling 0.32 arcsec; measured seeing FWHM 1.17 \u00b1 0.04 arcsec. The 256-cell angular volume has approximately 1.4 arcsec sampling and Gaussian sigma 0.5 cell (about 0.7 arcsec; FWHM 1.65 arcsec), hence remains coarser than the observation. Kernel width and peak optical depth 1.5 are authored display settings, not measured density or extinction.",
+  "resolutionNote": "SITELLE native sampling 0.32 arcsec; measured seeing FWHM 1.17 ± 0.04 arcsec. The 256-cell angular volume has approximately 1.4 arcsec sampling and Gaussian sigma 0.5 cell (about 0.7 arcsec; FWHM 1.65 arcsec), hence remains coarser than the observation. Kernel width and peak optical depth 1.5 are authored display settings, not measured density or extinction.",
   "emissionFit": {
     "sourceIds": [
       "hubble-optical",
diff --git a/src/objects/m1/source/bake-inputs/references/08-sitelle-alignment-check.json b/src/objects/m1-volume/source/bake-inputs/references/08-sitelle-alignment-check.json
similarity index 99%
rename from src/objects/m1/source/bake-inputs/references/08-sitelle-alignment-check.json
rename to src/objects/m1-volume/source/bake-inputs/references/08-sitelle-alignment-check.json
index 51dc8f17256..ae3d0adf325 100644
--- a/src/objects/m1/source/bake-inputs/references/08-sitelle-alignment-check.json
+++ b/src/objects/m1-volume/source/bake-inputs/references/08-sitelle-alignment-check.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-intake-registration-evidence@1",
-  "objectId": "m1",
+  "objectId": "m1-volume",
   "source": {
     "id": "sitelle-deep",
     "path": ".local/nebula-lab/intake/m1/physical/m1.deep_frame.fits",
diff --git a/src/objects/m1/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json b/src/objects/m1-volume/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json
similarity index 100%
rename from src/objects/m1/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json
rename to src/objects/m1-volume/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json
diff --git a/src/objects/m1/source/bake-inputs/references/10-vla-radio-grid-transfer.json b/src/objects/m1-volume/source/bake-inputs/references/10-vla-radio-grid-transfer.json
similarity index 100%
rename from src/objects/m1/source/bake-inputs/references/10-vla-radio-grid-transfer.json
rename to src/objects/m1-volume/source/bake-inputs/references/10-vla-radio-grid-transfer.json
diff --git a/src/objects/m1/source/bake-inputs/references/11-webb-components-astrometric-calibration.json b/src/objects/m1-volume/source/bake-inputs/references/11-webb-components-astrometric-calibration.json
similarity index 100%
rename from src/objects/m1/source/bake-inputs/references/11-webb-components-astrometric-calibration.json
rename to src/objects/m1-volume/source/bake-inputs/references/11-webb-components-astrometric-calibration.json
diff --git a/src/objects/m1/source/bake-inputs/references/12-webb-components-matched-stars.json b/src/objects/m1-volume/source/bake-inputs/references/12-webb-components-matched-stars.json
similarity index 100%
rename from src/objects/m1/source/bake-inputs/references/12-webb-components-matched-stars.json
rename to src/objects/m1-volume/source/bake-inputs/references/12-webb-components-matched-stars.json
diff --git a/src/objects/m1/source/compact/README.md b/src/objects/m1-volume/source/compact/README.md
similarity index 100%
rename from src/objects/m1/source/compact/README.md
rename to src/objects/m1-volume/source/compact/README.md
diff --git a/src/objects/m1/source/compact/chandra-xray-colors.f64.gz b/src/objects/m1-volume/source/compact/chandra-xray-colors.f64.gz
similarity index 100%
rename from src/objects/m1/source/compact/chandra-xray-colors.f64.gz
rename to src/objects/m1-volume/source/compact/chandra-xray-colors.f64.gz
diff --git a/src/objects/m1/source/compact/hubble-optical-colors.f64.gz b/src/objects/m1-volume/source/compact/hubble-optical-colors.f64.gz
similarity index 100%
rename from src/objects/m1/source/compact/hubble-optical-colors.f64.gz
rename to src/objects/m1-volume/source/compact/hubble-optical-colors.f64.gz
diff --git a/src/objects/m1-volume/source/compact/model.json.gz b/src/objects/m1-volume/source/compact/model.json.gz
new file mode 100644
index 00000000000..63eb30517cc
Binary files /dev/null and b/src/objects/m1-volume/source/compact/model.json.gz differ
diff --git a/src/objects/m1/source/compact/particles.fits.gz b/src/objects/m1-volume/source/compact/particles.fits.gz
similarity index 100%
rename from src/objects/m1/source/compact/particles.fits.gz
rename to src/objects/m1-volume/source/compact/particles.fits.gz
diff --git a/src/objects/m1/source/compact/spitzer-infrared-colors.f64.gz b/src/objects/m1-volume/source/compact/spitzer-infrared-colors.f64.gz
similarity index 100%
rename from src/objects/m1/source/compact/spitzer-infrared-colors.f64.gz
rename to src/objects/m1-volume/source/compact/spitzer-infrared-colors.f64.gz
diff --git a/src/objects/m1/source/compact/vla-radio-colors.f64.gz b/src/objects/m1-volume/source/compact/vla-radio-colors.f64.gz
similarity index 100%
rename from src/objects/m1/source/compact/vla-radio-colors.f64.gz
rename to src/objects/m1-volume/source/compact/vla-radio-colors.f64.gz
diff --git a/src/objects/m1/source/compact/webb-components-colors.f64.gz b/src/objects/m1-volume/source/compact/webb-components-colors.f64.gz
similarity index 100%
rename from src/objects/m1/source/compact/webb-components-colors.f64.gz
rename to src/objects/m1-volume/source/compact/webb-components-colors.f64.gz
diff --git a/src/objects/m1/source/compact/webb-infrared-colors.f64.gz b/src/objects/m1-volume/source/compact/webb-infrared-colors.f64.gz
similarity index 100%
rename from src/objects/m1/source/compact/webb-infrared-colors.f64.gz
rename to src/objects/m1-volume/source/compact/webb-infrared-colors.f64.gz
diff --git a/src/objects/m1/source/delivery.json b/src/objects/m1-volume/source/delivery.json
similarity index 91%
rename from src/objects/m1/source/delivery.json
rename to src/objects/m1-volume/source/delivery.json
index b5cb5d110bb..04a53f6ce73 100644
--- a/src/objects/m1/source/delivery.json
+++ b/src/objects/m1-volume/source/delivery.json
@@ -1,9 +1,9 @@
 {
   "schema": "cssearth-nebula-delivery@2",
-  "id": "m1",
+  "id": "m1-volume",
   "method": "compiler",
   "request": {
-    "path": "src/objects/m1/source/request.json"
+    "path": "src/objects/m1-volume/source/request.json"
   },
   "inputPins": [
     {
@@ -58,10 +58,10 @@
   "framingRadiusUnits": 135.788986,
   "acceptedLabResult": "m1",
   "fieldStars": {
-    "path": "src/objects/m1/source/stellar-field.json"
+    "path": "src/objects/m1-volume/source/stellar-field.json"
   },
   "compactInputs": {
-    "path": "src/objects/m1/source/compact/model.json.gz"
+    "path": "src/objects/m1-volume/source/compact/model.json.gz"
   },
   "compactMethod": "sampled"
 }
diff --git a/src/objects/m1-volume/source/manifest.json b/src/objects/m1-volume/source/manifest.json
new file mode 100644
index 00000000000..2128c61a8ff
--- /dev/null
+++ b/src/objects/m1-volume/source/manifest.json
@@ -0,0 +1,632 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "hubble-optical",
+      "path": ".local/nebula-lab/observations/m1/sources/hubble-optical.tif",
+      "origin": "https://esahubble.org/images/heic0515a/",
+      "sourceUrl": "https://esahubble.org/images/heic0515a/",
+      "title": "Crab Nebula · Hubble · optical lines",
+      "credit": "NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble)",
+      "displayCredit": "NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble)",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esahubble-heic0515a",
+            "role": "material",
+            "evidence": "labs/nebula/models/m1/observations.json#/images/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "hubble-optical",
+      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "hubble",
+            "evidence": "https://esahubble.org/images/heic0515a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "webb-infrared",
+      "path": ".local/nebula-lab/observations/m1/sources/webb-infrared.tif",
+      "origin": "https://esawebb.org/images/weic2326a/",
+      "sourceUrl": "https://esawebb.org/images/weic2326a/",
+      "title": "Crab Nebula · Webb · near/mid-infrared",
+      "credit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
+      "displayCredit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esawebb-weic2326a",
+            "role": "material",
+            "evidence": "labs/nebula/models/m1/observations.json#/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "webb-infrared",
+      "license": "Provider terms: https://esawebb.org/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "webb",
+            "evidence": "https://esawebb.org/images/weic2326a/ — NIRCam and MIRI; Colours & filters"
+          }
+        ]
+      }
+    },
+    {
+      "id": "webb-components",
+      "path": ".local/nebula-lab/observations/m1/sources/webb-components.tif",
+      "origin": "https://esawebb.org/images/weic2417a/",
+      "sourceUrl": "https://esawebb.org/images/weic2417a/",
+      "title": "Crab Nebula · Webb · dust, sulfur, synchrotron",
+      "credit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
+      "displayCredit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esawebb-weic2417a",
+            "role": "material",
+            "evidence": "labs/nebula/models/m1/observations.json#/images/2"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "webb-components",
+      "license": "Provider terms: https://esawebb.org/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "webb",
+            "evidence": "https://esawebb.org/images/weic2417a/ — Webb infrared components"
+          }
+        ]
+      }
+    },
+    {
+      "id": "spitzer-infrared",
+      "path": ".local/nebula-lab/observations/m1/sources/spitzer-infrared.tif",
+      "origin": "https://esahubble.org/images/potw1720c/",
+      "sourceUrl": "https://esahubble.org/images/potw1720c/",
+      "title": "Crab Nebula · Spitzer · mid-infrared",
+      "credit": "JPL/Caltech",
+      "displayCredit": "JPL/Caltech",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esahubble-potw1720c",
+            "role": "material",
+            "evidence": "labs/nebula/models/m1/observations.json#/images/3"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "spitzer-infrared",
+      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "spitzer",
+            "evidence": "https://esahubble.org/images/potw1720c/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "vla-radio",
+      "path": ".local/nebula-lab/observations/m1/sources/vla-radio.tif",
+      "origin": "https://esahubble.org/images/potw1720b/",
+      "sourceUrl": "https://esahubble.org/images/potw1720b/",
+      "title": "Crab Nebula · VLA · radio synchrotron",
+      "credit": "NRAO/AUI/NSF",
+      "displayCredit": "NRAO/AUI/NSF",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esahubble-potw1720b",
+            "role": "material",
+            "evidence": "labs/nebula/models/m1/observations.json#/images/4"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "vla-radio",
+      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vla",
+            "evidence": "https://esahubble.org/images/potw1720b/ — VLA radio observation"
+          }
+        ]
+      }
+    },
+    {
+      "id": "chandra-xray",
+      "path": ".local/nebula-lab/observations/m1/sources/chandra-xray.tif",
+      "origin": "https://esahubble.org/images/potw1720f/",
+      "sourceUrl": "https://esahubble.org/images/potw1720f/",
+      "title": "Crab Nebula · Chandra · X-ray pulsar wind",
+      "credit": "CXC",
+      "displayCredit": "CXC",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esahubble-potw1720f",
+            "role": "material",
+            "evidence": "labs/nebula/models/m1/observations.json#/images/5"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "chandra-xray",
+      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "chandra",
+            "evidence": "https://esahubble.org/images/potw1720f/ — Chandra X-ray observation"
+          }
+        ]
+      }
+    },
+    {
+      "id": "hubble-2017-bridge",
+      "path": ".local/nebula-lab/observations/m1/sources/hubble-2017-bridge.tif",
+      "origin": "https://esahubble.org/images/potw1720d/",
+      "sourceUrl": "https://esahubble.org/images/potw1720d/",
+      "title": "Crab Nebula · Hubble · 2017 common-grid astrometric bridge",
+      "credit": "NASA, ESA, and J. Hester (Arizona State University)",
+      "displayCredit": "NASA, ESA, and J. Hester (Arizona State University)",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esahubble-potw1720d",
+            "role": "reference",
+            "evidence": "labs/nebula/models/m1/observations.json#/images/6"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "hubble",
+            "evidence": "https://esahubble.org/images/potw1720d/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "physical-evidence",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json",
+      "origin": "https://arxiv.org/pdf/2101.02709v1",
+      "sourceUrl": "https://arxiv.org/pdf/2101.02709v1",
+      "title": "Crab Nebula physical evidence and authored limits",
+      "credit": "Published structural studies; authored display assumptions",
+      "acquisition": "Checked-in evidence ledger. This pin identifies the metadata record; cited publications and native scientific arrays retain their own identities. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "martin-2021",
+            "role": "method",
+            "evidence": "src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json#/sources/4"
+          },
+          {
+            "catalogueId": "ng-romani-2004",
+            "role": "method",
+            "evidence": "src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json#/sources/0"
+          },
+          {
+            "catalogueId": "kaplan-2008",
+            "role": "reference",
+            "evidence": "src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json#/sources/3"
+          },
+          {
+            "catalogueId": "lin-2023",
+            "role": "reference",
+            "evidence": "src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json#/sources/9"
+          },
+          {
+            "catalogueId": "simbad-gaia-crab-pulsar",
+            "role": "reference",
+            "evidence": "src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json#/evidence/8"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "sitelle-1",
+      "path": ".local/nebula-lab/intake/m1/physical/3dmap_XYZflux.fits",
+      "origin": "https://raw.githubusercontent.com/thomasorb/M1_paper/af491d4a13d408464ffb3ea75e6a424f6ef5d140/3dmap_XYZflux.fits",
+      "sourceUrl": "https://github.com/thomasorb/M1_paper/tree/af491d4a13d408464ffb3ea75e6a424f6ef5d140",
+      "title": "Crab SITELLE · 3dmap_XYZflux.fits",
+      "credit": "Thomas Martin; Martin, Milisavljevic & Drissen (2021)",
+      "acquisition": "Native released FITS product pinned by the physical-source receipt. Coordinate units, grid transport and conditional depth interpretation are separately qualified in the sampled recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "sitelle-2016-released-points",
+            "role": "material",
+            "evidence": "labs/nebula/models/m1/physical-sources.json#/dataset/products/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "GPL-3.0 repository licence retained in the pinned physical-source receipt.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "cfht",
+            "evidence": "https://www.cfht.hawaii.edu/en/news/HeartofTheCrab/ — SITELLE at CFHT generated Martin, Milisavljevic and Drissen’s Crab mapping; released products are pinned in labs/nebula/models/m1/physical-sources.json"
+          }
+        ]
+      }
+    },
+    {
+      "id": "sitelle-2",
+      "path": ".local/nebula-lab/intake/m1/physical/3dmap_XYZvel.fits",
+      "origin": "https://raw.githubusercontent.com/thomasorb/M1_paper/af491d4a13d408464ffb3ea75e6a424f6ef5d140/3dmap_XYZvel.fits",
+      "sourceUrl": "https://github.com/thomasorb/M1_paper/tree/af491d4a13d408464ffb3ea75e6a424f6ef5d140",
+      "title": "Crab SITELLE · 3dmap_XYZvel.fits",
+      "credit": "Thomas Martin; Martin, Milisavljevic & Drissen (2021)",
+      "acquisition": "Native released FITS product pinned by the physical-source receipt. Coordinate units, grid transport and conditional depth interpretation are separately qualified in the sampled recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "sitelle-2016-released-points",
+            "role": "material",
+            "evidence": "labs/nebula/models/m1/physical-sources.json#/dataset/products/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "GPL-3.0 repository licence retained in the pinned physical-source receipt.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "cfht",
+            "evidence": "https://www.cfht.hawaii.edu/en/news/HeartofTheCrab/ — SITELLE at CFHT generated Martin, Milisavljevic and Drissen’s Crab mapping; released products are pinned in labs/nebula/models/m1/physical-sources.json"
+          }
+        ]
+      }
+    },
+    {
+      "id": "sitelle-4",
+      "path": ".local/nebula-lab/intake/m1/physical/m1.deep_frame.fits",
+      "origin": "https://raw.githubusercontent.com/thomasorb/M1_paper/af491d4a13d408464ffb3ea75e6a424f6ef5d140/m1.deep_frame.fits",
+      "sourceUrl": "https://github.com/thomasorb/M1_paper/tree/af491d4a13d408464ffb3ea75e6a424f6ef5d140",
+      "title": "Crab SITELLE · m1.deep_frame.fits",
+      "credit": "Thomas Martin; Martin, Milisavljevic & Drissen (2021)",
+      "acquisition": "Native released FITS product pinned by the physical-source receipt. Coordinate units, grid transport and conditional depth interpretation are separately qualified in the sampled recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "sitelle-2016-released-points",
+            "role": "reference",
+            "evidence": "labs/nebula/models/m1/physical-sources.json#/dataset/products/3"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "GPL-3.0 repository licence retained in the pinned physical-source receipt.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "cfht",
+            "evidence": "https://www.cfht.hawaii.edu/en/news/HeartofTheCrab/ — SITELLE at CFHT generated Martin, Milisavljevic and Drissen’s Crab mapping; released products are pinned in labs/nebula/models/m1/physical-sources.json"
+          }
+        ]
+      }
+    },
+    {
+      "id": "distance",
+      "path": "src/objects/m1-volume/source/delivery.json",
+      "origin": "https://arxiv.org/pdf/2101.02709v1",
+      "sourceUrl": "https://arxiv.org/pdf/2101.02709v1",
+      "title": "Crab Nebula adopted world placement",
+      "credit": "Martin, Milisavljevic & Drissen (2021), 3D mapping of the Crab Nebula with SITELLE. I",
+      "acquisition": "Checked-in delivery record. The pin identifies our placement metadata, not downloaded paper bytes; the adopted value and uncertainty are explained in the body README.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "martin-2021",
+            "role": "reference",
+            "evidence": "src/objects/m1-volume/source/delivery.json#/sky/distancePc"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "stellar-field",
+      "path": "src/objects/m1-volume/source/stellar-field.json",
+      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "title": "Crab Nebula surrounding Gaia DR3 stellar field",
+      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
+      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
+      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "gaia-dr3-gavo",
+            "role": "material",
+            "evidence": "src/objects/m1-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "bailer-jones-2021-distances",
+            "role": "method",
+            "evidence": "src/objects/m1-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "cardiel-2021-rgb",
+            "role": "method",
+            "evidence": "src/objects/m1-volume/source/stellar-field.json#/provenance"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "gaia",
+            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-1",
+      "path": "src/objects/m1-volume/source/delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/m1-volume/source/nebula.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-3",
+      "path": "src/objects/m1-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/m1-volume/source/request.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "retained-evidence-5",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/01-chandra-xray-grid-transfer.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-6",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/02-compiler.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-7",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-8",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/04-observation-structures.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-9",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/05-observations.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-10",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/07-sampled.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-11",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/08-sitelle-alignment-check.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-12",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-13",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/10-vla-radio-grid-transfer.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-14",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/11-webb-components-astrometric-calibration.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-15",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/12-webb-components-matched-stars.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-16",
+      "path": "src/objects/m1-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-17",
+      "path": "src/objects/m1-volume/source/replay-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
+      }
+    }
+  ],
+  "generatedIntermediates": [
+    {
+      "id": "compact-compact-hubble-optical-colors-f64-gz",
+      "path": "src/objects/m1-volume/source/compact/hubble-optical-colors.f64.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-spitzer-infrared-colors-f64-gz",
+      "path": "src/objects/m1-volume/source/compact/spitzer-infrared-colors.f64.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-webb-components-colors-f64-gz",
+      "path": "src/objects/m1-volume/source/compact/webb-components-colors.f64.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-chandra-xray-colors-f64-gz",
+      "path": "src/objects/m1-volume/source/compact/chandra-xray-colors.f64.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-webb-infrared-colors-f64-gz",
+      "path": "src/objects/m1-volume/source/compact/webb-infrared-colors.f64.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-particles-fits-gz",
+      "path": "src/objects/m1-volume/source/compact/particles.fits.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-vla-radio-colors-f64-gz",
+      "path": "src/objects/m1-volume/source/compact/vla-radio-colors.f64.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-model-json-gz",
+      "path": "src/objects/m1-volume/source/compact/model.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice model/material input or replay record; published inputs are separately bound in this manifest and retained provenance."
+      }
+    },
+    {
+      "id": "compact-compact-README-md",
+      "path": "src/objects/m1-volume/source/compact/README.md",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice model/material input or replay record; published inputs are separately bound in this manifest and retained provenance."
+      }
+    }
+  ]
+}
diff --git a/src/objects/m1/source/nebula.json b/src/objects/m1-volume/source/nebula.json
similarity index 98%
rename from src/objects/m1/source/nebula.json
rename to src/objects/m1-volume/source/nebula.json
index 1cad8e0062e..f2b3720ddd7 100644
--- a/src/objects/m1/source/nebula.json
+++ b/src/objects/m1-volume/source/nebula.json
@@ -55,7 +55,7 @@
         "sourceRef": "m1-registered-frame"
       },
       "status": "confirmed",
-      "detailedObjectId": "m1"
+      "detailedObjectId": "m1-volume"
     }
   ]
 }
diff --git a/src/objects/m1/source/presentation.json b/src/objects/m1-volume/source/presentation.json
similarity index 88%
rename from src/objects/m1/source/presentation.json
rename to src/objects/m1-volume/source/presentation.json
index 2d9b871c890..bdee801d727 100644
--- a/src/objects/m1/source/presentation.json
+++ b/src/objects/m1-volume/source/presentation.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m1",
+  "objectId": "m1-volume",
   "name": "Crab Nebula",
   "defaultDataset": "hubble-optical",
   "sharedInputs": [
@@ -201,64 +201,64 @@
     }
   ],
   "bank": {
-    "path": "src/objects/m1/prepared/datasets.json"
+    "path": "src/objects/m1-volume/prepared/datasets.json"
   },
   "recipes": [
     {
       "id": "recipe-1",
-      "path": "src/objects/m1/source/delivery.json"
+      "path": "src/objects/m1-volume/source/delivery.json"
     },
     {
       "id": "recipe-2",
-      "path": "src/objects/m1/source/request.json"
+      "path": "src/objects/m1-volume/source/request.json"
     },
     {
       "id": "recipe-3",
-      "path": "src/objects/m1/source/bake-inputs/references/01-chandra-xray-grid-transfer.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/01-chandra-xray-grid-transfer.json"
     },
     {
       "id": "recipe-4",
-      "path": "src/objects/m1/source/bake-inputs/references/02-compiler.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/02-compiler.json"
     },
     {
       "id": "recipe-5",
-      "path": "src/objects/m1/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json"
     },
     {
       "id": "recipe-6",
-      "path": "src/objects/m1/source/bake-inputs/references/04-observation-structures.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/04-observation-structures.json"
     },
     {
       "id": "recipe-7",
-      "path": "src/objects/m1/source/bake-inputs/references/05-observations.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/05-observations.json"
     },
     {
       "id": "recipe-8",
-      "path": "src/objects/m1/source/bake-inputs/references/06-physical-evidence.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json"
     },
     {
       "id": "recipe-9",
-      "path": "src/objects/m1/source/bake-inputs/references/07-sampled.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/07-sampled.json"
     },
     {
       "id": "recipe-10",
-      "path": "src/objects/m1/source/bake-inputs/references/08-sitelle-alignment-check.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/08-sitelle-alignment-check.json"
     },
     {
       "id": "recipe-11",
-      "path": "src/objects/m1/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json"
     },
     {
       "id": "recipe-12",
-      "path": "src/objects/m1/source/bake-inputs/references/10-vla-radio-grid-transfer.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/10-vla-radio-grid-transfer.json"
     },
     {
       "id": "recipe-13",
-      "path": "src/objects/m1/source/bake-inputs/references/11-webb-components-astrometric-calibration.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/11-webb-components-astrometric-calibration.json"
     },
     {
       "id": "recipe-14",
-      "path": "src/objects/m1/source/bake-inputs/references/12-webb-components-matched-stars.json"
+      "path": "src/objects/m1-volume/source/bake-inputs/references/12-webb-components-matched-stars.json"
     }
   ]
 }
diff --git a/src/objects/m1/source/provenance-references.json b/src/objects/m1-volume/source/provenance-references.json
similarity index 53%
rename from src/objects/m1/source/provenance-references.json
rename to src/objects/m1-volume/source/provenance-references.json
index 892124d8f0a..9596bf81d90 100644
--- a/src/objects/m1/source/provenance-references.json
+++ b/src/objects/m1-volume/source/provenance-references.json
@@ -3,62 +3,62 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/m1/physical-evidence.json",
-      "path": "src/objects/m1/source/bake-inputs/references/06-physical-evidence.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/06-physical-evidence.json",
       "bytes": 17007
     },
     {
       "originalPath": "labs/nebula/models/m1/chandra-xray-grid-transfer.json",
-      "path": "src/objects/m1/source/bake-inputs/references/01-chandra-xray-grid-transfer.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/01-chandra-xray-grid-transfer.json",
       "bytes": 1846
     },
     {
       "originalPath": "labs/nebula/models/m1/compiler.json",
-      "path": "src/objects/m1/source/bake-inputs/references/02-compiler.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/02-compiler.json",
       "bytes": 1132
     },
     {
       "originalPath": "labs/nebula/models/m1/hubble-2017-bridge-matched-stars.json",
-      "path": "src/objects/m1/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json",
       "bytes": 28015
     },
     {
       "originalPath": "labs/nebula/models/m1/observation-structures.json",
-      "path": "src/objects/m1/source/bake-inputs/references/04-observation-structures.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/04-observation-structures.json",
       "bytes": 371
     },
     {
       "originalPath": "labs/nebula/models/m1/observations.json",
-      "path": "src/objects/m1/source/bake-inputs/references/05-observations.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/05-observations.json",
       "bytes": 14682
     },
     {
       "originalPath": "labs/nebula/models/m1/sampled.json",
-      "path": "src/objects/m1/source/bake-inputs/references/07-sampled.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/07-sampled.json",
       "bytes": 5839
     },
     {
       "originalPath": "labs/nebula/models/m1/sitelle-alignment-check.json",
-      "path": "src/objects/m1/source/bake-inputs/references/08-sitelle-alignment-check.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/08-sitelle-alignment-check.json",
       "bytes": 25298
     },
     {
       "originalPath": "labs/nebula/models/m1/spitzer-infrared-grid-transfer.json",
-      "path": "src/objects/m1/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json",
       "bytes": 1850
     },
     {
       "originalPath": "labs/nebula/models/m1/vla-radio-grid-transfer.json",
-      "path": "src/objects/m1/source/bake-inputs/references/10-vla-radio-grid-transfer.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/10-vla-radio-grid-transfer.json",
       "bytes": 1843
     },
     {
       "originalPath": "labs/nebula/models/m1/webb-components-astrometric-calibration.json",
-      "path": "src/objects/m1/source/bake-inputs/references/11-webb-components-astrometric-calibration.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/11-webb-components-astrometric-calibration.json",
       "bytes": 1862
     },
     {
       "originalPath": "labs/nebula/models/m1/webb-components-matched-stars.json",
-      "path": "src/objects/m1/source/bake-inputs/references/12-webb-components-matched-stars.json",
+      "path": "src/objects/m1-volume/source/bake-inputs/references/12-webb-components-matched-stars.json",
       "bytes": 15572
     }
   ]
diff --git a/src/objects/m1/source/replay-references.json b/src/objects/m1-volume/source/replay-references.json
similarity index 100%
rename from src/objects/m1/source/replay-references.json
rename to src/objects/m1-volume/source/replay-references.json
diff --git a/src/objects/m1/source/request.json b/src/objects/m1-volume/source/request.json
similarity index 100%
rename from src/objects/m1/source/request.json
rename to src/objects/m1-volume/source/request.json
diff --git a/src/objects/m1/source/stellar-field.json b/src/objects/m1-volume/source/stellar-field.json
similarity index 99%
rename from src/objects/m1/source/stellar-field.json
rename to src/objects/m1-volume/source/stellar-field.json
index 411e2d3b887..ee0e95f62d3 100644
--- a/src/objects/m1/source/stellar-field.json
+++ b/src/objects/m1-volume/source/stellar-field.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-gaia-nebula-field@1",
-  "id": "m1",
+  "id": "m1-volume",
   "coordinateEpochJulianYear": 2016,
   "selection": {
     "centerIcrsDegrees": [
diff --git a/src/objects/m1/README.md b/src/objects/m1/README.md
index cd1e231dd04..1ab7e1876be 100644
--- a/src/objects/m1/README.md
+++ b/src/objects/m1/README.md
@@ -1,46 +1,16 @@
-# Crab Nebula (M1)
+# Crab Nebula
 
-Six spectral datasets share expansion-inferred ejecta and an authored pulsar-wind model. **Hubble optical is the default.** Display color and opacity do not measure gas or dust density.
+Crab Nebula as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Crab Nebula volume](../m1-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Source / dataset | Selected observation and scope |
-| --- | --- |
-| [Hubble optical](https://esahubble.org/images/heic0515a/) | WFPC2 optical-line mosaic, 1999–2002; 3864² pixels, 6.41′ square. |
-| [Webb infrared](https://esawebb.org/images/weic2326a/) | NIRCam/MIRI, 2022–2023; 4000 × 3483 pixels, 5.47′ × 4.76′. |
-| [Webb components](https://esawebb.org/images/weic2417a/) | Derived synchrotron/sulfur/dust display from the same observations; 2958 × 2569 pixels. The registered field is about 5.47′ × 4.75′ after an explicit 2.67% scale correction. |
-| [Spitzer infrared](https://esahubble.org/images/potw1720c/) | MIPS 24 µm attribution comes from the companion release; exposure date unspecified. |
-| [VLA radio](https://esahubble.org/images/potw1720b/) | Approximately 3 GHz; 2012 observations with older large-scale template information. |
-| [Chandra X-rays](https://esahubble.org/images/potw1720f/) | ACIS composite; companion release spans 2000–2013, exact stack/passband unspecified. |
-| [SITELLE ejecta](https://doi.org/10.1093/mnras/staa4046) | 416,573 released 2016 emission samples; depth assumes an expansion law and 2,000 pc. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m1.json) cites the position, distance and velocity that place it.
 
-The last three images share a 5290²-pixel, 8.83′ publisher grid transferred through a separately registered 2017 Hubble bridge. They have no independent field-star registration. Infrared, radio and X-ray colors are representational; compact nonstellar emission is preserved.
+## Processing
 
-The adopted **2,000 pc** scale follows [Martin et al. (2021), §3.4](https://doi.org/10.1093/mnras/staa4046), not a new distance fit; its cited 1.7–2.4 kpc range is not a statistical error. [Lin et al. (2023)](https://arxiv.org/abs/2306.01617) report the alternative VLBI pulsar distance of 1.90 +0.22/−0.18 kpc. The [stellar field](source/stellar-field.json) supplies 280 Gaia sources within an authored 50 pc sphere, G < 16, using Bailer-Jones distance estimates and retained uncertainty intervals. One named pulsar keeps its original conditional depth and spectral appearance: 281 displayed points.
-
-Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
-
-## Evidence
-
-- Recorded app checks cover the catalogue field, projection and star toggle; evidence context states their version and limits.
-- The [object descriptor](object.json) pins the installed bank whose provenance identifies compiler result `3fac3e884fb5…`. The [delivery request](source/delivery.json) pins preparation inputs and retains the older accepted-lab reference separately. This documentation review did not perform a cold replay.
-- [Historical processing evidence](../../../labs/nebula/models/m1/processing-evidence.json) separates stellar registration, native pixel accounting and projected-signal checks. These establish their recorded processing behavior, not physical depth or current material acceptance.
+1. `pnpm prepare:objects --object=m1` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m1` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- Image color repeated through depth, softened filaments and oblique glow remain. Trials that lost the front view or created beads were rejected; shipping this version does not resolve that material failure.
-- Expansion may be nonuniform; smoothing, diffuse interior, jet lengths and strengths remain conditional. The northern ejecta-jet arrays were not acquired.
-- Unequal epochs, footprints and PSFs prevent a calibrated multiband comparison. Missing image coverage is not absent emission; no extinction, dust-density or relativistic radiative-transfer solution is claimed.
-
-<details>
-<summary>Methods and historical comparisons</summary>
-
-The [fixed processing account](../../../labs/nebula/models/m1/README.md) preserves the earlier result identities and failed material trials. [Physical evidence](../../../labs/nebula/models/m1/physical-evidence.json) distinguishes SITELLE measurements, Ng–Romani torus parameters and authored terms; the [source dossier](../../../labs/nebula/models/m1/source-dossier.json) preserves registration, epochs and alternatives. General preparation belongs in the [nebula guide](../../../docs/nebulae/README.md).
-
-</details>
-
-## Compact delivery inputs
-
-The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
-
-Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m1/inventory.json b/src/objects/m1/inventory.json
index 091c1c5b776..9245953a136 100644
--- a/src/objects/m1/inventory.json
+++ b/src/objects/m1/inventory.json
@@ -3,1107 +3,81 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/chandra-xray.webp",
+      "filename": "m1-dataset-chandra-xray.webp",
       "bytes": 4464,
       "sha256": "f1003f7dda2f71284e34864cac22d813741436c701f9acbc48d70e4a9c87e44d"
     },
     {
       "location": "public",
-      "filename": "datasets/hubble-optical.webp",
+      "filename": "m1-dataset-hubble-optical.webp",
       "bytes": 33070,
       "sha256": "53507d986cbe3b15755973f1fbd014985cb6bfd9162d970caf433c47c12d5972"
     },
     {
       "location": "public",
-      "filename": "datasets/spitzer-infrared.webp",
+      "filename": "m1-dataset-spitzer-infrared.webp",
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       "sha256": "997084d4eefa56cefd3deb16d31cc177506c9146886e6a2c3778a9b36d446814"
     },
     {
       "location": "public",
-      "filename": "datasets/vla-radio.webp",
+      "filename": "m1-dataset-vla-radio.webp",
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       "sha256": "091a46d432385f2a5417dce2f1183576119761640482815eb6bb838c24152066"
     },
     {
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-      "filename": "datasets/webb-components.webp",
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-      "bytes": 255012,
-      "sha256": "c6c87d0deb64cc9c3a6f9617a5ba2fa86e445c6b82b557e3ae3f99f65785fddf"
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diff --git a/src/objects/m1/object.json b/src/objects/m1/object.json
index 05227dbe40e..e5ed7166ddd 100644
--- a/src/objects/m1/object.json
+++ b/src/objects/m1/object.json
@@ -1,42 +1,97 @@
 {
   "schema": "cssearth-object@2",
   "id": "m1",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Crab Nebula",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 40627486340224.22
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Crab Nebula",
+      "systemName": "Milky Way",
+      "classification": "nebula",
+      "color": "#9a9a9a",
+      "distanceAu": 412529612.5,
+      "description": "The Crab combines an expanding supernova remnant with a pulsar wind nebula.",
+      "aliases": [
+        "M1",
+        "NGC 1952",
+        "Crab"
+      ],
+      "order": 5139,
+      "context": {}
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       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
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-        0.031045928829824782,
-        0.5582208269556465,
-        0.8278320620053893,
-        0.04604058831023959
+      "presentationToReference": [
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-          183.49862979538614,
-          172.9527315312835,
-          165.92213268854837
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-    "preparation": {
-      "source": "source/delivery.json"
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
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+      "metersPerUnit": 131056407549110.38,
+      "bodyRadiusM": 40627486340224216
     }
   },
   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m1/source/compact/model.json.gz b/src/objects/m1/source/compact/model.json.gz
deleted file mode 100644
index 6aa32a1a3e3..00000000000
Binary files a/src/objects/m1/source/compact/model.json.gz and /dev/null differ
diff --git a/src/objects/m1/source/content/object.json b/src/objects/m1/source/content/object.json
new file mode 100644
index 00000000000..247eef893e5
--- /dev/null
+++ b/src/objects/m1/source/content/object.json
@@ -0,0 +1,143 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m1",
+  "displayName": "Crab Nebula",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "2 kpc",
+        "source": {
+          "catalogueId": "martin-2021",
+          "url": "https://arxiv.org/pdf/2101.02709v1",
+          "label": "Martin, Milisavljevic & Drissen (2021), 3D mapping of the Crab Nebula with SITELLE. I",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "hubble-optical",
+    "controls": [
+      {
+        "id": "hubble-optical",
+        "label": "Hubble \u00b7 optical lines",
+        "thumbnail": "m1-dataset-hubble-optical.webp",
+        "volume": {
+          "objectId": "m1-volume",
+          "datasetId": "hubble-optical",
+          "surface": "hubble-optical"
+        },
+        "source": {
+          "id": "m1-volume-hubble-optical",
+          "path": "../../m1-volume/source/manifest.json",
+          "url": "https://esahubble.org/images/heic0515a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "webb-infrared",
+        "label": "Webb \u00b7 near/mid-infrared",
+        "thumbnail": "m1-dataset-webb-infrared.webp",
+        "volume": {
+          "objectId": "m1-volume",
+          "datasetId": "webb-infrared",
+          "surface": "webb-infrared"
+        },
+        "source": {
+          "id": "m1-volume-webb-infrared",
+          "path": "../../m1-volume/source/manifest.json",
+          "url": "https://esawebb.org/images/weic2326a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "webb-components",
+        "label": "Webb \u00b7 dust, sulfur, synchrotron",
+        "thumbnail": "m1-dataset-webb-components.webp",
+        "volume": {
+          "objectId": "m1-volume",
+          "datasetId": "webb-components",
+          "surface": "webb-components"
+        },
+        "source": {
+          "id": "m1-volume-webb-components",
+          "path": "../../m1-volume/source/manifest.json",
+          "url": "https://esawebb.org/images/weic2417a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "spitzer-infrared",
+        "label": "Spitzer \u00b7 mid-infrared",
+        "thumbnail": "m1-dataset-spitzer-infrared.webp",
+        "volume": {
+          "objectId": "m1-volume",
+          "datasetId": "spitzer-infrared",
+          "surface": "spitzer-infrared"
+        },
+        "source": {
+          "id": "m1-volume-spitzer-infrared",
+          "path": "../../m1-volume/source/manifest.json",
+          "url": "https://esahubble.org/images/potw1720c/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "vla-radio",
+        "label": "VLA \u00b7 radio synchrotron",
+        "thumbnail": "m1-dataset-vla-radio.webp",
+        "volume": {
+          "objectId": "m1-volume",
+          "datasetId": "vla-radio",
+          "surface": "vla-radio"
+        },
+        "source": {
+          "id": "m1-volume-vla-radio",
+          "path": "../../m1-volume/source/manifest.json",
+          "url": "https://esahubble.org/images/potw1720b/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "chandra-xray",
+        "label": "Chandra \u00b7 X-ray pulsar wind",
+        "thumbnail": "m1-dataset-chandra-xray.webp",
+        "volume": {
+          "objectId": "m1-volume",
+          "datasetId": "chandra-xray",
+          "surface": "chandra-xray"
+        },
+        "source": {
+          "id": "m1-volume-chandra-xray",
+          "path": "../../m1-volume/source/manifest.json",
+          "url": "https://esahubble.org/images/potw1720f/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Martin, Milisavljevic & Drissen (2021), 3D mapping of the Crab Nebula with SITELLE. I",
+      "href": "https://arxiv.org/pdf/2101.02709v1"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://arxiv.org/pdf/2101.02709v1",
+      "credit": "Martin, Milisavljevic & Drissen (2021), 3D mapping of the Crab Nebula with SITELLE. I"
+    }
+  }
+}
diff --git a/src/objects/m1/source/manifest.json b/src/objects/m1/source/manifest.json
index 3fa9b865c39..aae9c762195 100644
--- a/src/objects/m1/source/manifest.json
+++ b/src/objects/m1/source/manifest.json
@@ -1,632 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "hubble-optical",
-      "path": ".local/nebula-lab/observations/m1/sources/hubble-optical.tif",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://esahubble.org/images/heic0515a/",
-      "sourceUrl": "https://esahubble.org/images/heic0515a/",
-      "title": "Crab Nebula · Hubble · optical lines",
-      "credit": "NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble)",
-      "displayCredit": "NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble)",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esahubble-heic0515a",
-            "role": "material",
-            "evidence": "labs/nebula/models/m1/observations.json#/images/0"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "hubble-optical",
-      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "hubble",
-            "evidence": "https://esahubble.org/images/heic0515a/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "webb-infrared",
-      "path": ".local/nebula-lab/observations/m1/sources/webb-infrared.tif",
-      "origin": "https://esawebb.org/images/weic2326a/",
-      "sourceUrl": "https://esawebb.org/images/weic2326a/",
-      "title": "Crab Nebula · Webb · near/mid-infrared",
-      "credit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
-      "displayCredit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esawebb-weic2326a",
-            "role": "material",
-            "evidence": "labs/nebula/models/m1/observations.json#/images/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "webb-infrared",
-      "license": "Provider terms: https://esawebb.org/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "webb",
-            "evidence": "https://esawebb.org/images/weic2326a/ — NIRCam and MIRI; Colours & filters"
-          }
-        ]
-      }
-    },
-    {
-      "id": "webb-components",
-      "path": ".local/nebula-lab/observations/m1/sources/webb-components.tif",
-      "origin": "https://esawebb.org/images/weic2417a/",
-      "sourceUrl": "https://esawebb.org/images/weic2417a/",
-      "title": "Crab Nebula · Webb · dust, sulfur, synchrotron",
-      "credit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
-      "displayCredit": "NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esawebb-weic2417a",
-            "role": "material",
-            "evidence": "labs/nebula/models/m1/observations.json#/images/2"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "webb-components",
-      "license": "Provider terms: https://esawebb.org/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "webb",
-            "evidence": "https://esawebb.org/images/weic2417a/ — Webb infrared components"
-          }
-        ]
-      }
-    },
-    {
-      "id": "spitzer-infrared",
-      "path": ".local/nebula-lab/observations/m1/sources/spitzer-infrared.tif",
-      "origin": "https://esahubble.org/images/potw1720c/",
-      "sourceUrl": "https://esahubble.org/images/potw1720c/",
-      "title": "Crab Nebula · Spitzer · mid-infrared",
-      "credit": "JPL/Caltech",
-      "displayCredit": "JPL/Caltech",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esahubble-potw1720c",
-            "role": "material",
-            "evidence": "labs/nebula/models/m1/observations.json#/images/3"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "spitzer-infrared",
+      "credit": "NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble); the default dataset's picture as the Crab Nebula bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "spitzer",
-            "evidence": "https://esahubble.org/images/potw1720c/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "vla-radio",
-      "path": ".local/nebula-lab/observations/m1/sources/vla-radio.tif",
-      "origin": "https://esahubble.org/images/potw1720b/",
-      "sourceUrl": "https://esahubble.org/images/potw1720b/",
-      "title": "Crab Nebula · VLA · radio synchrotron",
-      "credit": "NRAO/AUI/NSF",
-      "displayCredit": "NRAO/AUI/NSF",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esahubble-potw1720b",
-            "role": "material",
-            "evidence": "labs/nebula/models/m1/observations.json#/images/4"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "vla-radio",
-      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "vla",
-            "evidence": "https://esahubble.org/images/potw1720b/ — VLA radio observation"
-          }
-        ]
-      }
-    },
-    {
-      "id": "chandra-xray",
-      "path": ".local/nebula-lab/observations/m1/sources/chandra-xray.tif",
-      "origin": "https://esahubble.org/images/potw1720f/",
-      "sourceUrl": "https://esahubble.org/images/potw1720f/",
-      "title": "Crab Nebula · Chandra · X-ray pulsar wind",
-      "credit": "CXC",
-      "displayCredit": "CXC",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esahubble-potw1720f",
-            "role": "material",
-            "evidence": "labs/nebula/models/m1/observations.json#/images/5"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "chandra-xray",
-      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "chandra",
-            "evidence": "https://esahubble.org/images/potw1720f/ — Chandra X-ray observation"
-          }
-        ]
-      }
-    },
-    {
-      "id": "hubble-2017-bridge",
-      "path": ".local/nebula-lab/observations/m1/sources/hubble-2017-bridge.tif",
-      "origin": "https://esahubble.org/images/potw1720d/",
-      "sourceUrl": "https://esahubble.org/images/potw1720d/",
-      "title": "Crab Nebula · Hubble · 2017 common-grid astrometric bridge",
-      "credit": "NASA, ESA, and J. Hester (Arizona State University)",
-      "displayCredit": "NASA, ESA, and J. Hester (Arizona State University)",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esahubble-potw1720d",
-            "role": "reference",
-            "evidence": "labs/nebula/models/m1/observations.json#/images/6"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "Provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "hubble",
-            "evidence": "https://esahubble.org/images/potw1720d/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "physical-evidence",
-      "path": "src/objects/m1/source/bake-inputs/references/06-physical-evidence.json",
-      "origin": "https://arxiv.org/pdf/2101.02709v1",
-      "sourceUrl": "https://arxiv.org/pdf/2101.02709v1",
-      "title": "Crab Nebula physical evidence and authored limits",
-      "credit": "Published structural studies; authored display assumptions",
-      "acquisition": "Checked-in evidence ledger. This pin identifies the metadata record; cited publications and native scientific arrays retain their own identities. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "martin-2021",
-            "role": "method",
-            "evidence": "src/objects/m1/source/bake-inputs/references/06-physical-evidence.json#/sources/4"
-          },
-          {
-            "catalogueId": "ng-romani-2004",
-            "role": "method",
-            "evidence": "src/objects/m1/source/bake-inputs/references/06-physical-evidence.json#/sources/0"
-          },
-          {
-            "catalogueId": "kaplan-2008",
-            "role": "reference",
-            "evidence": "src/objects/m1/source/bake-inputs/references/06-physical-evidence.json#/sources/3"
-          },
-          {
-            "catalogueId": "lin-2023",
-            "role": "reference",
-            "evidence": "src/objects/m1/source/bake-inputs/references/06-physical-evidence.json#/sources/9"
-          },
-          {
-            "catalogueId": "simbad-gaia-crab-pulsar",
-            "role": "reference",
-            "evidence": "src/objects/m1/source/bake-inputs/references/06-physical-evidence.json#/evidence/8"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "sitelle-1",
-      "path": ".local/nebula-lab/intake/m1/physical/3dmap_XYZflux.fits",
-      "origin": "https://raw.githubusercontent.com/thomasorb/M1_paper/af491d4a13d408464ffb3ea75e6a424f6ef5d140/3dmap_XYZflux.fits",
-      "sourceUrl": "https://github.com/thomasorb/M1_paper/tree/af491d4a13d408464ffb3ea75e6a424f6ef5d140",
-      "title": "Crab SITELLE · 3dmap_XYZflux.fits",
-      "credit": "Thomas Martin; Martin, Milisavljevic & Drissen (2021)",
-      "acquisition": "Native released FITS product pinned by the physical-source receipt. Coordinate units, grid transport and conditional depth interpretation are separately qualified in the sampled recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "sitelle-2016-released-points",
-            "role": "material",
-            "evidence": "labs/nebula/models/m1/physical-sources.json#/dataset/products/0"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "GPL-3.0 repository licence retained in the pinned physical-source receipt.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "cfht",
-            "evidence": "https://www.cfht.hawaii.edu/en/news/HeartofTheCrab/ — SITELLE at CFHT generated Martin, Milisavljevic and Drissen’s Crab mapping; released products are pinned in labs/nebula/models/m1/physical-sources.json"
-          }
-        ]
-      }
-    },
-    {
-      "id": "sitelle-2",
-      "path": ".local/nebula-lab/intake/m1/physical/3dmap_XYZvel.fits",
-      "origin": "https://raw.githubusercontent.com/thomasorb/M1_paper/af491d4a13d408464ffb3ea75e6a424f6ef5d140/3dmap_XYZvel.fits",
-      "sourceUrl": "https://github.com/thomasorb/M1_paper/tree/af491d4a13d408464ffb3ea75e6a424f6ef5d140",
-      "title": "Crab SITELLE · 3dmap_XYZvel.fits",
-      "credit": "Thomas Martin; Martin, Milisavljevic & Drissen (2021)",
-      "acquisition": "Native released FITS product pinned by the physical-source receipt. Coordinate units, grid transport and conditional depth interpretation are separately qualified in the sampled recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "sitelle-2016-released-points",
-            "role": "material",
-            "evidence": "labs/nebula/models/m1/physical-sources.json#/dataset/products/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "GPL-3.0 repository licence retained in the pinned physical-source receipt.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "cfht",
-            "evidence": "https://www.cfht.hawaii.edu/en/news/HeartofTheCrab/ — SITELLE at CFHT generated Martin, Milisavljevic and Drissen’s Crab mapping; released products are pinned in labs/nebula/models/m1/physical-sources.json"
-          }
-        ]
-      }
-    },
-    {
-      "id": "sitelle-4",
-      "path": ".local/nebula-lab/intake/m1/physical/m1.deep_frame.fits",
-      "origin": "https://raw.githubusercontent.com/thomasorb/M1_paper/af491d4a13d408464ffb3ea75e6a424f6ef5d140/m1.deep_frame.fits",
-      "sourceUrl": "https://github.com/thomasorb/M1_paper/tree/af491d4a13d408464ffb3ea75e6a424f6ef5d140",
-      "title": "Crab SITELLE · m1.deep_frame.fits",
-      "credit": "Thomas Martin; Martin, Milisavljevic & Drissen (2021)",
-      "acquisition": "Native released FITS product pinned by the physical-source receipt. Coordinate units, grid transport and conditional depth interpretation are separately qualified in the sampled recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "sitelle-2016-released-points",
-            "role": "reference",
-            "evidence": "labs/nebula/models/m1/physical-sources.json#/dataset/products/3"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "GPL-3.0 repository licence retained in the pinned physical-source receipt.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "cfht",
-            "evidence": "https://www.cfht.hawaii.edu/en/news/HeartofTheCrab/ — SITELLE at CFHT generated Martin, Milisavljevic and Drissen’s Crab mapping; released products are pinned in labs/nebula/models/m1/physical-sources.json"
-          }
-        ]
-      }
-    },
-    {
-      "id": "distance",
-      "path": "src/objects/m1/source/delivery.json",
-      "origin": "https://arxiv.org/pdf/2101.02709v1",
-      "sourceUrl": "https://arxiv.org/pdf/2101.02709v1",
-      "title": "Crab Nebula adopted world placement",
-      "credit": "Martin, Milisavljevic & Drissen (2021), 3D mapping of the Crab Nebula with SITELLE. I",
-      "acquisition": "Checked-in delivery record. The pin identifies our placement metadata, not downloaded paper bytes; the adopted value and uncertainty are explained in the body README.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "martin-2021",
-            "role": "reference",
-            "evidence": "src/objects/m1/source/delivery.json#/sky/distancePc"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "stellar-field",
-      "path": "src/objects/m1/source/stellar-field.json",
-      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "title": "Crab Nebula surrounding Gaia DR3 stellar field",
-      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
-      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
-      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "gaia-dr3-gavo",
-            "role": "material",
-            "evidence": "src/objects/m1/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "bailer-jones-2021-distances",
-            "role": "method",
-            "evidence": "src/objects/m1/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "cardiel-2021-rgb",
-            "role": "method",
-            "evidence": "src/objects/m1/source/stellar-field.json#/provenance"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "gaia",
-            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
-          }
-        ]
-      }
-    }
-  ],
-  "documents": [
-    {
-      "id": "document-1",
-      "path": "src/objects/m1/source/delivery.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "document-2",
-      "path": "src/objects/m1/source/nebula.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "document-3",
-      "path": "src/objects/m1/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "document-4",
-      "path": "src/objects/m1/source/request.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "retained-evidence-5",
-      "path": "src/objects/m1/source/bake-inputs/references/01-chandra-xray-grid-transfer.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-6",
-      "path": "src/objects/m1/source/bake-inputs/references/02-compiler.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-7",
-      "path": "src/objects/m1/source/bake-inputs/references/03-hubble-2017-bridge-matched-stars.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-8",
-      "path": "src/objects/m1/source/bake-inputs/references/04-observation-structures.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-9",
-      "path": "src/objects/m1/source/bake-inputs/references/05-observations.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-10",
-      "path": "src/objects/m1/source/bake-inputs/references/07-sampled.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-11",
-      "path": "src/objects/m1/source/bake-inputs/references/08-sitelle-alignment-check.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-12",
-      "path": "src/objects/m1/source/bake-inputs/references/09-spitzer-infrared-grid-transfer.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-13",
-      "path": "src/objects/m1/source/bake-inputs/references/10-vla-radio-grid-transfer.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-14",
-      "path": "src/objects/m1/source/bake-inputs/references/11-webb-components-astrometric-calibration.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-15",
-      "path": "src/objects/m1/source/bake-inputs/references/12-webb-components-matched-stars.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-16",
-      "path": "src/objects/m1/source/provenance-references.json",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-17",
-      "path": "src/objects/m1/source/replay-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m1-volume/source/manifest.json)."
       }
     }
   ],
-  "generatedIntermediates": [
-    {
-      "id": "compact-compact-hubble-optical-colors-f64-gz",
-      "path": "src/objects/m1/source/compact/hubble-optical-colors.f64.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
-    {
-      "id": "compact-compact-spitzer-infrared-colors-f64-gz",
-      "path": "src/objects/m1/source/compact/spitzer-infrared-colors.f64.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
-    {
-      "id": "compact-compact-webb-components-colors-f64-gz",
-      "path": "src/objects/m1/source/compact/webb-components-colors.f64.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
-    {
-      "id": "compact-compact-chandra-xray-colors-f64-gz",
-      "path": "src/objects/m1/source/compact/chandra-xray-colors.f64.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
-    {
-      "id": "compact-compact-webb-infrared-colors-f64-gz",
-      "path": "src/objects/m1/source/compact/webb-infrared-colors.f64.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
-    {
-      "id": "compact-compact-particles-fits-gz",
-      "path": "src/objects/m1/source/compact/particles.fits.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
+  "documents": [
     {
-      "id": "compact-compact-vla-radio-colors-f64-gz",
-      "path": "src/objects/m1/source/compact/vla-radio-colors.f64.gz",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "compact-compact-model-json-gz",
-      "path": "src/objects/m1/source/compact/model.json.gz",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Accepted pre-slice model/material input or replay record; published inputs are separately bound in this manifest and retained provenance."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "compact-compact-README-md",
-      "path": "src/objects/m1/source/compact/README.md",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice model/material input or replay record; published inputs are separately bound in this manifest and retained provenance."
-      }
+      "path": "preparation/navigation.json"
     }
   ]
 }
diff --git a/src/objects/m1/source/preparation/navigation.json b/src/objects/m1/source/preparation/navigation.json
new file mode 100644
index 00000000000..b1e02db62e3
--- /dev/null
+++ b/src/objects/m1/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m1",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m1/source/presentation/context.png b/src/objects/m1/source/presentation/context.png
new file mode 100644
index 00000000000..006013fa7c1
Binary files /dev/null and b/src/objects/m1/source/presentation/context.png differ
diff --git a/src/objects/m1/source/presentation/solar-system.json b/src/objects/m1/source/presentation/solar-system.json
new file mode 100644
index 00000000000..c736d03a877
--- /dev/null
+++ b/src/objects/m1/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m1",
+  "displayName": "Crab Nebula",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 40627486340224.22,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m1/text.json b/src/objects/m1/text.json
new file mode 100644
index 00000000000..94dde814fa8
--- /dev/null
+++ b/src/objects/m1/text.json
@@ -0,0 +1,114 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m1",
+  "card": {
+    "text": "The Crab combines an expanding supernova remnant with a pulsar wind nebula.",
+    "sources": [
+      {
+        "catalogueId": "martin-2021",
+        "url": "https://arxiv.org/pdf/2101.02709v1",
+        "label": "Martin, Milisavljevic & Drissen (2021), 3D mapping of the Crab Nebula with SITELLE. I",
+        "checked": "2026-10-01",
+        "locator": "distance: 2 kpc"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "The Crab combines an expanding supernova remnant with a pulsar wind nebula. It lies about 2,000 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "martin-2021",
+        "url": "https://arxiv.org/pdf/2101.02709v1",
+        "label": "Martin, Milisavljevic & Drissen (2021), 3D mapping of the Crab Nebula with SITELLE. I",
+        "checked": "2026-10-01",
+        "locator": "distance: 2 kpc"
+      }
+    ]
+  },
+  "datasets": {
+    "hubble-optical": {
+      "title": "Crab ejecta in optical emission lines",
+      "detail": "3864 × 3864 px",
+      "summary": "Optical line colors on expansion-inferred ejecta and a modeled pulsar wind; fine structure is softened.",
+      "sources": [
+        {
+          "catalogueId": "esahubble-heic0515a",
+          "url": "https://esahubble.org/images/heic0515a/",
+          "label": "Crab Nebula · Hubble · optical lines; NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble)",
+          "checked": "2026-10-01",
+          "locator": "Crab Nebula · Hubble · optical lines"
+        }
+      ]
+    },
+    "webb-infrared": {
+      "title": "Crab filaments and wind in infrared",
+      "detail": "4000 × 3483 px",
+      "summary": "Infrared false color on expansion-inferred ejecta and a modeled pulsar wind; fine structure is softened.",
+      "sources": [
+        {
+          "catalogueId": "esawebb-weic2326a",
+          "url": "https://esawebb.org/images/weic2326a/",
+          "label": "Crab Nebula · Webb · near/mid-infrared; NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
+          "checked": "2026-10-01",
+          "locator": "Crab Nebula · Webb · near/mid-infrared"
+        }
+      ]
+    },
+    "webb-components": {
+      "title": "Crab dust, sulfur and synchrotron",
+      "detail": "2958 × 2569 px",
+      "summary": "Published dust, sulfur and synchrotron component colors on an inferred 3D model; not measured material density.",
+      "sources": [
+        {
+          "catalogueId": "esawebb-weic2417a",
+          "url": "https://esawebb.org/images/weic2417a/",
+          "label": "Crab Nebula · Webb · dust, sulfur, synchrotron; NASA, ESA, CSA, STScI, T. Temim (Princeton University)",
+          "checked": "2026-10-01",
+          "locator": "Crab Nebula · Webb · dust, sulfur, synchrotron"
+        }
+      ]
+    },
+    "spitzer-infrared": {
+      "title": "Crab emission at 24 micrometres",
+      "detail": "5290 × 5290 px",
+      "summary": "Mid-infrared false color on inferred ejecta and pulsar-wind geometry; brightness is not calibrated.",
+      "sources": [
+        {
+          "catalogueId": "esahubble-potw1720c",
+          "url": "https://esahubble.org/images/potw1720c/",
+          "label": "Crab Nebula · Spitzer · mid-infrared; JPL/Caltech",
+          "checked": "2026-10-01",
+          "locator": "Crab Nebula · Spitzer · mid-infrared"
+        }
+      ]
+    },
+    "vla-radio": {
+      "title": "Crab radio synchrotron emission",
+      "detail": "5290 × 5290 px",
+      "summary": "Radio display colors on modeled wind and ejecta geometry; no measured radio depth.",
+      "sources": [
+        {
+          "catalogueId": "esahubble-potw1720b",
+          "url": "https://esahubble.org/images/potw1720b/",
+          "label": "Crab Nebula · VLA · radio synchrotron; NRAO/AUI/NSF",
+          "checked": "2026-10-01",
+          "locator": "Crab Nebula · VLA · radio synchrotron"
+        }
+      ]
+    },
+    "chandra-xray": {
+      "title": "Crab inner pulsar wind in X-rays",
+      "detail": "5290 × 5290 px",
+      "summary": "X-ray pulsar-wind display on published torus/jet assumptions; depth and emission strength are modeled.",
+      "sources": [
+        {
+          "catalogueId": "esahubble-potw1720f",
+          "url": "https://esahubble.org/images/potw1720f/",
+          "label": "Crab Nebula · Chandra · X-ray pulsar wind; CXC",
+          "checked": "2026-10-01",
+          "locator": "Crab Nebula · Chandra · X-ray pulsar wind"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m2-9-volume/README.md b/src/objects/m2-9-volume/README.md
new file mode 100644
index 00000000000..1cdfaefeb71
--- /dev/null
+++ b/src/objects/m2-9-volume/README.md
@@ -0,0 +1,42 @@
+# Twin Jet Nebula (M2–9)
+
+One Hubble optical dataset displays an axially symmetric, image-conditioned emission model. **Depth and inclination are not measured.** The adopted physical scale remains substantially uncertain.
+
+## Sources
+
+| Source | Role and limits |
+| --- | --- |
+| [Hubble/WFPC2, opo9738a](https://esahubble.org/images/opo9738a/) and [APOD 2004-02-01](https://apod.nasa.gov/apod/ap040201.html) | Same 1997 optical photograph, with [O I]/nitrogen/[O III] display colors; the pinned 800 × 525 JPEG supplies the image. |
+| [Wenger, Lorenz & Magnor (2013)](https://doi.org/10.1111/cgf.12216) | Independently implemented axial group-sparsity method; no author code or restricted downloadable volumes are used. |
+| [Image-frame record](source/image-frame.json) | Native hashes and cross-edition astrometry; caption-free 788 × 438 crop, 58.0350″ × 32.2766″. |
+
+The adopted **650 pc** distance follows [Sánchez Contreras et al. (2024), §2](https://arxiv.org/html/2411.03825v1#S2). [Corradi et al. (2011), abstract](https://arxiv.org/abs/1102.5634) report an expansion distance of 1300 ± 200 pc, which would double this model’s physical size. At 650 pc the displayed crop is about 0.183 pc wide, not the full nebula’s measured extent.
+
+The [stellar field](source/stellar-field.json) supplies seven Gaia sources in an authored 10 pc sphere, G < 14, using Bailer-Jones distance estimates with uncertainty intervals. The original four manually masked image points are a removal aid, not a catalogue or measured membership sample.
+
+Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
+
+## Evidence
+
+- [Delivery](source/delivery.json) retains the 144-slice symmetry result and adds the independently prepared catalogue field. This does not rerun or relabel the original separation as NOX.
+- The [fixed experiment report](../../../labs/nebula/models/m2-9/README.md) records synthetic hollow-shell and zero-regularization controls, real front/oblique inspection and the original test/build results. Source-image fit errors are not physical depth errors.
+- This provenance update makes no fresh cold-replay, independent scientific-review or material-acceptance claim. The historical external review timed out and was not completed.
+
+## Known problems
+
+- Authored axis position and zero inclination select one of many possible depths from a single photograph.
+- Faint planar background, rings and directional color/brightness changes remain in oblique views. Photographic RGB is neither calibrated additive emission nor measured density.
+- The small working grid is a bounded method trial; finer source pixels alone cannot resolve the distance or symmetry ambiguity.
+
+<details>
+<summary>Methods and historical comparisons</summary>
+
+The [fixed lab account](../../../labs/nebula/models/m2-9/README.md) preserves crop, manual point masks, independent FISTA/proximal implementation, original timings and failed-view limitations. The [planetary-nebula method](../../../labs/nebula/docs/planetary-nebulae.md) describes the paper and its constraints. Common preparation is in the [nebula guide](../../../docs/nebulae/README.md).
+
+</details>
+
+## Compact delivery inputs
+
+The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
+
+Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
diff --git a/src/objects/m2-9-volume/inventory.json b/src/objects/m2-9-volume/inventory.json
new file mode 100644
index 00000000000..aec3489b4f8
--- /dev/null
+++ b/src/objects/m2-9-volume/inventory.json
@@ -0,0 +1,209 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/hst-optical.webp",
+      "bytes": 14756,
+      "sha256": "72f7576c0a11938573b0e6d2d81a9f607abc3a7554eb0c7491c9cee37bc1db56"
+    },
+    {
+      "location": "prepared",
+      "filename": "datasets.json",
+      "bytes": 76770,
+      "sha256": "42cfd255efe4402ed73d7dc9a4e3c381f1053804fbb93da8857626581d61ab93"
+    },
+    {
+      "location": "prepared",
+      "filename": "delivery.json",
+      "bytes": 3882,
+      "sha256": "9cd39a47263ea3d81be7fd8347b350f3fb9b7f0ae0cf9e22f227604a5a81c19f"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/atlases/x.webp",
+      "bytes": 960178,
+      "sha256": "b2791d685eec441c17fc958ad570921ac005501b75e1863f1aa92d324938bf4d"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/atlases/y.webp",
+      "bytes": 559912,
+      "sha256": "f8e3901458d31bbef7950e13b0485577931aa55f85f58d0c5978495c3012f5f6"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/atlases/z.webp",
+      "bytes": 591912,
+      "sha256": "0fdc832b3ad4073a86c3e5a2249f3e9b4a2788c9e0e219f220f97bd88f449a78"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-00n.png",
+      "bytes": 81115,
+      "sha256": "962028f7d4468978fa47ac7d10306c4a69b963de981556f08c63da9797a1a12b"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-00p.png",
+      "bytes": 81144,
+      "sha256": "b32ecef06817bd74fb03c92a236a3b7adec404d168116e2eaaa5b954cd2f5ccf"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-0n0.png",
+      "bytes": 71905,
+      "sha256": "3af5ee55158ecf1f4b772c42708c620425d70a784bf89a341163768707d874c8"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-0nn.png",
+      "bytes": 99004,
+      "sha256": "e09b662f0937c79c4b26f92e048004cc031ce87945a820ec68cd41cc541327ce"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-0np.png",
+      "bytes": 98413,
+      "sha256": "fe7d027b29598fe1759da942e9318a3b8f3e72d29e3429a998c3810afce5bae6"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-0p0.png",
+      "bytes": 71943,
+      "sha256": "177c5b57ea32b9c9556b0b4ef47b686c5d581fa9c59b0bcb6894122be53c4150"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-0pn.png",
+      "bytes": 98363,
+      "sha256": "3765b26e25454119bfe9c4e8eae202c5fe42bd90a40b43cf6b1935ffe718cd87"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-0pp.png",
+      "bytes": 99208,
+      "sha256": "91138a32942bf17c175020018a285b406dbefb6685be884fccd5b5d416274eff"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-n00.png",
+      "bytes": 36398,
+      "sha256": "51e65262db13bf21f36945370ebce205f980026ce8521b0fc8008028c8a4a491"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-n0n.png",
+      "bytes": 83572,
+      "sha256": "00faffefba47fd30933d3a069ba5a607e7b5300c091478c5ecfcacc3dfdceff2"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-n0p.png",
+      "bytes": 84163,
+      "sha256": "43e42f56f3902a55629dec302f5972811cd2f25964c102b6d64ad6847cc53c2e"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-nn0.png",
+      "bytes": 63421,
+      "sha256": "5006b66b582a1723a9fc80796a926bedb45ea22a36b3aebb200ee670e900eee0"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-nnn.png",
+      "bytes": 104125,
+      "sha256": "97d573f715a14216454e0c25fe2286eac424cd102353efe37e0e8b59c70b2ee6"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-nnp.png",
+      "bytes": 104355,
+      "sha256": "57f2040dc8f23226da1114e37615cee6a137d01c4c9a02d980c2d7a564f535be"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-np0.png",
+      "bytes": 59966,
+      "sha256": "b5730ec35fbf115ed480573977e9b90a5209740b5c0c5400282237408629e408"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-npn.png",
+      "bytes": 99463,
+      "sha256": "cf3d81a34180a2616941c1cf0a5dfe153b5e7d43076a6948f6e77bd4079789a8"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-npp.png",
+      "bytes": 99818,
+      "sha256": "91a0b765bcb834cbfdc19549e52162282c67f17fce8d5594febc7cb5fe6fdfcc"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-p00.png",
+      "bytes": 36461,
+      "sha256": "2036703f4570feace3f7fa7f64315fcfd3b43271c7262bea91eb6f588cb788b9"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-p0n.png",
+      "bytes": 84037,
+      "sha256": "1d5075b71e04a5a61204534ea19ed2ee72191a84dba35892d08d0d2e6ec99939"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-p0p.png",
+      "bytes": 83612,
+      "sha256": "e41837a45a7cd9304cc4f329914831a406a534e8b755462dbf89556c5d0b5099"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-pn0.png",
+      "bytes": 59915,
+      "sha256": "92bb11bc3bf9c968e653d9432e32e0dc5c12057e5c7a0bc19d7a4300006b17e3"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-pnn.png",
+      "bytes": 99710,
+      "sha256": "b0885fbe7eeb902cd07f602dc36bb83cbb8c235eea66c1c4866036da39e42e6e"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-pnp.png",
+      "bytes": 99418,
+      "sha256": "ead9b24b605d278ff9a628b1a542ba20118414ac2df4946174c0872dd4f9bd37"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-pp0.png",
+      "bytes": 63385,
+      "sha256": "478733b7b4366fe9e6beac44017ac2de680500b9cfee770a63b8693beb59d147"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-ppn.png",
+      "bytes": 104247,
+      "sha256": "b6595da503bcb4d6be222ee875e4680315a1b7569e47715a2423058a2d071523"
+    },
+    {
+      "location": "prepared",
+      "filename": "hst-optical/impostors/view-ppp.png",
+      "bytes": 104143,
+      "sha256": "1e39f38cda56dfe62fd3494dde07a0881226ed9ee45f6c179837f56c493ec04d"
+    },
+    {
+      "location": "prepared",
+      "filename": "presentation.json",
+      "bytes": 1863,
+      "sha256": "120942527f8b7f6a77d5466a0fcf38363dccf3c1fc50306b4724b3aca5916aba"
+    },
+    {
+      "location": "prepared",
+      "filename": "provenance.json",
+      "bytes": 11338,
+      "sha256": "c4926dfe8ca2815cad5365ed2308514cdc137347df087f2007a8c03dbefe42df"
+    }
+  ]
+}
diff --git a/src/objects/m2-9/investigations.json b/src/objects/m2-9-volume/investigations.json
similarity index 93%
rename from src/objects/m2-9/investigations.json
rename to src/objects/m2-9-volume/investigations.json
index 66ec788fbce..aa06b6fb65b 100644
--- a/src/objects/m2-9/investigations.json
+++ b/src/objects/m2-9-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "m2-9",
+  "objectId": "m2-9-volume",
   "entries": [
     {
       "id": "dataset-hst-optical",
@@ -8,8 +8,8 @@
       "status": "included",
       "finding": "The 1997 Hubble/WFPC2 optical photograph is pinned through its APOD JPEG and cross-edition ESA astrometry. The caption-free crop is 788 by 438 pixels, 58.0350 by 32.2766 arcsec. The 144-slice symmetry fit is conditional emission, not measured depth; four manual point masks are not a catalogue.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9/source/presentation.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9/source/image-frame.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9-volume/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9-volume/source/image-frame.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m2-9/experiment.json"
       ]
     },
@@ -19,8 +19,8 @@
       "status": "included",
       "finding": "Seven Gaia sources in an authored 10 pc sphere, G < 14; sparse surroundings are preserved without inventing missing stars. Actual catalogue source IDs, median distances and uncertainty intervals are retained. Sphere, quality cuts, budget, brightness response and fade are display selections, not a membership survey; Cardiel BP-RP display color uses a neutral fallback outside its valid range.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9/source/stellar-field.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9/source/delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9-volume/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9-volume/source/delivery.json",
         "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
         "https://arxiv.org/abs/2012.05220",
         "https://arxiv.org/abs/2107.08734"
@@ -44,8 +44,8 @@
       "status": "included",
       "finding": "The selected Sánchez Contreras 2024 interpretation sets the frame scale; the displayed optical crop is about 0.183 pc wide at 650 pc. It is not a new parallax or the full paper nebula extent.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9/source/nebula.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9/source/image-frame.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9-volume/source/nebula.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9-volume/source/image-frame.json",
         "https://arxiv.org/abs/2411.03825v1"
       ]
     },
@@ -55,7 +55,7 @@
       "status": "deferred",
       "finding": "Corradi 2011 gives a substantially different expansion distance. Applying it would double physical size; it cannot be silently averaged with the adopted 650 pc model.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9/source/nebula.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9-volume/source/nebula.json",
         "https://arxiv.org/abs/1102.5634"
       ],
       "revisitWhen": "Choose an explicitly justified distance model and propagate its uncertainty through every frame/extent before changing scale."
@@ -67,7 +67,7 @@
       "finding": "The original trial identified an inconsistent NASA science-page coordinate. The app uses the pinned cross-edition image-frame evidence rather than that page value.",
       "evidence": [
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m2-9/README.md",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9/source/image-frame.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m2-9-volume/source/image-frame.json"
       ],
       "revisitWhen": "Revisit only if corrected publisher astrometry is independently verified against the selected native photograph."
     },
diff --git a/src/objects/m2-9-volume/object.json b/src/objects/m2-9-volume/object.json
new file mode 100644
index 00000000000..538746da81d
--- /dev/null
+++ b/src/objects/m2-9-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "m2-9-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        -4639854198945162000,
+        -19190526609290568000,
+        -3531975474921165300
+      ],
+      "localToReferenceXyzw": [
+        -0.34101329716160933,
+        0.6868469990897411,
+        -0.4917021814714364,
+        -0.41252890291059086
+      ],
+      "metersPerUnit": 564324590702700,
+      "boundsUnits": {
+        "min": [
+          -5,
+          -2.7777777777777777,
+          -2.7777777777777777
+        ],
+        "max": [
+          5,
+          2.7777777777777777,
+          2.7777777777777777
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/delivery.json"
+    },
+    "host": "m2-9"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/m2-9/source/bake-inputs/references/00-experiment.json b/src/objects/m2-9-volume/source/bake-inputs/references/00-experiment.json
similarity index 100%
rename from src/objects/m2-9/source/bake-inputs/references/00-experiment.json
rename to src/objects/m2-9-volume/source/bake-inputs/references/00-experiment.json
diff --git a/src/objects/m2-9/source/compact/README.md b/src/objects/m2-9-volume/source/compact/README.md
similarity index 100%
rename from src/objects/m2-9/source/compact/README.md
rename to src/objects/m2-9-volume/source/compact/README.md
diff --git a/src/objects/m2-9/source/compact/emission-0.f32.gz b/src/objects/m2-9-volume/source/compact/emission-0.f32.gz
similarity index 100%
rename from src/objects/m2-9/source/compact/emission-0.f32.gz
rename to src/objects/m2-9-volume/source/compact/emission-0.f32.gz
diff --git a/src/objects/m2-9/source/compact/emission-1.f32.gz b/src/objects/m2-9-volume/source/compact/emission-1.f32.gz
similarity index 100%
rename from src/objects/m2-9/source/compact/emission-1.f32.gz
rename to src/objects/m2-9-volume/source/compact/emission-1.f32.gz
diff --git a/src/objects/m2-9/source/compact/emission-2.f32.gz b/src/objects/m2-9-volume/source/compact/emission-2.f32.gz
similarity index 100%
rename from src/objects/m2-9/source/compact/emission-2.f32.gz
rename to src/objects/m2-9-volume/source/compact/emission-2.f32.gz
diff --git a/src/objects/m2-9/source/compact/model.json b/src/objects/m2-9-volume/source/compact/model.json
similarity index 96%
rename from src/objects/m2-9/source/compact/model.json
rename to src/objects/m2-9-volume/source/compact/model.json
index 0fb83c0a2be..a2bd73978d7 100644
--- a/src/objects/m2-9/source/compact/model.json
+++ b/src/objects/m2-9-volume/source/compact/model.json
@@ -72,15 +72,15 @@
   },
   "channels": [
     {
-      "path": "src/objects/m2-9/source/compact/emission-0.f32.gz",
+      "path": "src/objects/m2-9-volume/source/compact/emission-0.f32.gz",
       "bytes": 3686400
     },
     {
-      "path": "src/objects/m2-9/source/compact/emission-1.f32.gz",
+      "path": "src/objects/m2-9-volume/source/compact/emission-1.f32.gz",
       "bytes": 3686400
     },
     {
-      "path": "src/objects/m2-9/source/compact/emission-2.f32.gz",
+      "path": "src/objects/m2-9-volume/source/compact/emission-2.f32.gz",
       "bytes": 3686400
     }
   ],
diff --git a/src/objects/m2-9/source/delivery.json b/src/objects/m2-9-volume/source/delivery.json
similarity index 69%
rename from src/objects/m2-9/source/delivery.json
rename to src/objects/m2-9-volume/source/delivery.json
index cc2fe1f2cc1..7ee3d24d8b9 100644
--- a/src/objects/m2-9/source/delivery.json
+++ b/src/objects/m2-9-volume/source/delivery.json
@@ -1,13 +1,13 @@
 {
   "schema": "cssearth-nebula-delivery@2",
-  "id": "m2-9",
+  "id": "m2-9-volume",
   "method": "axial-symmetry",
   "request": {
     "path": "labs/nebula/models/m2-9/experiment.json"
   },
   "inputPins": [
     {
-      "path": "src/objects/m2-9/source/image-frame.json"
+      "path": "src/objects/m2-9-volume/source/image-frame.json"
     }
   ],
   "sky": {
@@ -20,16 +20,16 @@
     "arcsecPerUnit": 5.803502910447201
   },
   "sourceUrl": "https://esahubble.org/images/opo9738a/",
-  "description": "Axially symmetric, image-conditioned Hubble emission model; single-image depth and inclination remain unmeasured. Adopted 650 pc model distance is uncertain; the published expansion distance of 1300\u00b1200 pc would double this physical size. The image baseline supplies no stellar catalogue; an independent Gaia field supplies the surrounding stars.",
+  "description": "Axially symmetric, image-conditioned Hubble emission model; single-image depth and inclination remain unmeasured. Adopted 650 pc model distance is uncertain; the published expansion distance of 1300±200 pc would double this physical size. The image baseline supplies no stellar catalogue; an independent Gaia field supplies the surrounding stars.",
   "defaultDataset": "hst-optical",
   "framingRadiusUnits": 5,
   "acceptedLabResult": "m2-9-inferred",
   "symmetryDirectory": ".local/nebula-lab/planetary/m2-9-inferred",
   "fieldStars": {
-    "path": "src/objects/m2-9/source/stellar-field.json"
+    "path": "src/objects/m2-9-volume/source/stellar-field.json"
   },
   "compactInputs": {
-    "path": "src/objects/m2-9/source/compact/model.json"
+    "path": "src/objects/m2-9-volume/source/compact/model.json"
   },
   "compactMethod": "symmetry"
 }
diff --git a/src/objects/m2-9/source/image-frame.json b/src/objects/m2-9-volume/source/image-frame.json
similarity index 90%
rename from src/objects/m2-9/source/image-frame.json
rename to src/objects/m2-9-volume/source/image-frame.json
index e4c99587966..0d906b2ccf4 100644
--- a/src/objects/m2-9/source/image-frame.json
+++ b/src/objects/m2-9-volume/source/image-frame.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-source-image-frame@1",
-  "objectId": "m2-9",
+  "objectId": "m2-9-volume",
   "retrievedAt": "2026-09-13",
   "interpretation": "Published angular astrometry transferred between two editions of the same 1997 HST photograph. The application distance is an explicitly adopted literature value; neither this transfer nor the accepted symmetry reconstruction measures depth or gas density.",
   "publisherImage": {
@@ -20,27 +20,50 @@
     "projection": "TAN",
     "coordinateFrame": "ICRS",
     "equinox": "J2000",
-    "referenceDimension": [2769, 1540],
-    "referencePixel": [1384, 770],
-    "referenceValueDeg": [256.407962101, -10.1425459988],
-    "scaleDeg": [-0.00000582190011481, 0.00000582190011481],
+    "referenceDimension": [
+      2769,
+      1540
+    ],
+    "referencePixel": [
+      1384,
+      770
+    ],
+    "referenceValueDeg": [
+      256.407962101,
+      -10.1425459988
+    ],
+    "scaleDeg": [
+      -5.82190011481e-06,
+      5.82190011481e-06
+    ],
     "rotationDeg": 113.59999999999998,
     "publisherQuality": "Full",
     "absoluteUncertaintyArcsec": null,
     "orientationDescription": "North is 113.6 degrees left of vertical in the displayed image. Preserve AVM/FITS pixel and rotation conventions when converting downward raster coordinates."
   },
-  "angularFrameArcsec": [58.03502910447201, 32.27661423650664],
+  "angularFrameArcsec": [
+    58.03502910447201,
+    32.27661423650664
+  ],
   "acceptedImage": {
     "url": "https://apod.nasa.gov/apod/image/0402/m2-9_hst_big.jpg",
     "pageUrl": "https://apod.nasa.gov/apod/ap040201.html",
     "width": 800,
     "height": 525,
-    "crop": { "left": 6, "top": 6, "width": 788, "height": 438 },
+    "crop": {
+      "left": 6,
+      "top": 6,
+      "width": 788,
+      "height": 438
+    },
     "cropDescription": "The existing accepted lab recipe removes the white border and caption. It does not use the full 800x525 captioned image as the angular field."
   },
   "imageTransfer": {
     "classification": "derived approximate registration between published editions",
-    "nativePerAcceptedPixel": [3.513959390862944, 3.5159817351598175],
+    "nativePerAcceptedPixel": [
+      3.513959390862944,
+      3.5159817351598175
+    ],
     "formula": "For zero-based top-left pixel centers: nativeX=(acceptedX-6+0.5)*2769/788-0.5; nativeY=(acceptedY-6+0.5)*1540/438-0.5. Convert those native raster positions to the WCS pixel convention before projecting.",
     "verification": {
       "samePhotographVisuallyConfirmed": true,
diff --git a/src/objects/m2-9-volume/source/manifest.json b/src/objects/m2-9-volume/source/manifest.json
new file mode 100644
index 00000000000..5e113124918
--- /dev/null
+++ b/src/objects/m2-9-volume/source/manifest.json
@@ -0,0 +1,210 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "hst-optical",
+      "path": ".local/nebula-lab/research/wenger/m2-9-original.jpg",
+      "origin": "https://apod.nasa.gov/apod/ap040201.html",
+      "sourceUrl": "https://apod.nasa.gov/apod/ap040201.html",
+      "title": "Twin Jet Nebula · accepted APOD edition",
+      "credit": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
+      "displayCredit": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "hubble-opo9738a",
+            "role": "material",
+            "evidence": "src/objects/m2-9-volume/source/image-frame.json#/acceptedImage"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "hst-optical",
+      "license": "CC-BY-4.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "hubble",
+            "missionId": "hubble",
+            "evidence": "https://esahubble.org/images/opo9738a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "image-frame",
+      "path": "src/objects/m2-9-volume/source/image-frame.json",
+      "origin": "https://arxiv.org/html/2411.03825v1",
+      "sourceUrl": "https://arxiv.org/html/2411.03825v1",
+      "title": "M2–9 angular frame and adopted distance",
+      "credit": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "sanchez-contreras-2024",
+            "role": "method",
+            "evidence": "src/objects/m2-9-volume/source/image-frame.json: /references"
+          },
+          {
+            "catalogueId": "corradi-2011",
+            "role": "method",
+            "evidence": "src/objects/m2-9-volume/source/image-frame.json: /references"
+          },
+          {
+            "catalogueId": "hubble-opo9738a",
+            "role": "reference",
+            "evidence": "src/objects/m2-9-volume/source/image-frame.json: publisherImage and WCS; angular registration transferred between editions of the same photograph"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "stellar-field",
+      "path": "src/objects/m2-9-volume/source/stellar-field.json",
+      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "title": "Twin Jet Nebula surrounding Gaia DR3 stellar field",
+      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
+      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
+      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "gaia-dr3-gavo",
+            "role": "material",
+            "evidence": "src/objects/m2-9-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "bailer-jones-2021-distances",
+            "role": "method",
+            "evidence": "src/objects/m2-9-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "cardiel-2021-rgb",
+            "role": "method",
+            "evidence": "src/objects/m2-9-volume/source/stellar-field.json#/provenance"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "gaia",
+            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-1",
+      "path": "src/objects/m2-9-volume/source/delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/m2-9-volume/source/image-frame.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-3",
+      "path": "src/objects/m2-9-volume/source/nebula.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/m2-9-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "retained-evidence-5",
+      "path": "src/objects/m2-9-volume/source/bake-inputs/references/00-experiment.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-6",
+      "path": "src/objects/m2-9-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-7",
+      "path": "src/objects/m2-9-volume/source/replay-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
+      }
+    }
+  ],
+  "generatedIntermediates": [
+    {
+      "id": "compact-compact-model-json",
+      "path": "src/objects/m2-9-volume/source/compact/model.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-emission-1-f32-gz",
+      "path": "src/objects/m2-9-volume/source/compact/emission-1.f32.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-emission-2-f32-gz",
+      "path": "src/objects/m2-9-volume/source/compact/emission-2.f32.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-emission-0-f32-gz",
+      "path": "src/objects/m2-9-volume/source/compact/emission-0.f32.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-README-md",
+      "path": "src/objects/m2-9-volume/source/compact/README.md",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice model/material input or replay record; published inputs are separately bound in this manifest and retained provenance."
+      }
+    }
+  ]
+}
diff --git a/src/objects/m2-9/source/nebula.json b/src/objects/m2-9-volume/source/nebula.json
similarity index 98%
rename from src/objects/m2-9/source/nebula.json
rename to src/objects/m2-9-volume/source/nebula.json
index ace9d7eb1eb..76050f4a596 100644
--- a/src/objects/m2-9/source/nebula.json
+++ b/src/objects/m2-9-volume/source/nebula.json
@@ -62,7 +62,7 @@
         "sourceRef": "hst-opo9738a"
       },
       "status": "confirmed",
-      "detailedObjectId": "m2-9"
+      "detailedObjectId": "m2-9-volume"
     }
   ]
 }
diff --git a/src/objects/m2-9/source/presentation.json b/src/objects/m2-9-volume/source/presentation.json
similarity index 88%
rename from src/objects/m2-9/source/presentation.json
rename to src/objects/m2-9-volume/source/presentation.json
index c60257b9199..4abefae0e72 100644
--- a/src/objects/m2-9/source/presentation.json
+++ b/src/objects/m2-9-volume/source/presentation.json
@@ -1,19 +1,19 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m2-9",
+  "objectId": "m2-9-volume",
   "name": "Twin Jet Nebula",
   "defaultDataset": "hst-optical",
   "bank": {
-    "path": "src/objects/m2-9/prepared/datasets.json"
+    "path": "src/objects/m2-9-volume/prepared/datasets.json"
   },
   "recipes": [
     {
       "id": "symmetry",
-      "path": "src/objects/m2-9/source/bake-inputs/references/00-experiment.json"
+      "path": "src/objects/m2-9-volume/source/bake-inputs/references/00-experiment.json"
     },
     {
       "id": "delivery",
-      "path": "src/objects/m2-9/source/delivery.json"
+      "path": "src/objects/m2-9-volume/source/delivery.json"
     }
   ],
   "sharedInputs": [
diff --git a/src/objects/m2-9/source/provenance-references.json b/src/objects/m2-9-volume/source/provenance-references.json
similarity index 65%
rename from src/objects/m2-9/source/provenance-references.json
rename to src/objects/m2-9-volume/source/provenance-references.json
index 6445aebcb9d..4f045cf01bf 100644
--- a/src/objects/m2-9/source/provenance-references.json
+++ b/src/objects/m2-9-volume/source/provenance-references.json
@@ -3,7 +3,7 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/m2-9/experiment.json",
-      "path": "src/objects/m2-9/source/bake-inputs/references/00-experiment.json",
+      "path": "src/objects/m2-9-volume/source/bake-inputs/references/00-experiment.json",
       "bytes": 2015
     }
   ]
diff --git a/src/objects/m2-9/source/replay-references.json b/src/objects/m2-9-volume/source/replay-references.json
similarity index 100%
rename from src/objects/m2-9/source/replay-references.json
rename to src/objects/m2-9-volume/source/replay-references.json
diff --git a/src/objects/m2-9/source/stellar-field.json b/src/objects/m2-9-volume/source/stellar-field.json
similarity index 99%
rename from src/objects/m2-9/source/stellar-field.json
rename to src/objects/m2-9-volume/source/stellar-field.json
index a4331012afe..1c8355f61f5 100644
--- a/src/objects/m2-9/source/stellar-field.json
+++ b/src/objects/m2-9-volume/source/stellar-field.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-gaia-nebula-field@1",
-  "id": "m2-9",
+  "id": "m2-9-volume",
   "coordinateEpochJulianYear": 2016,
   "selection": {
     "centerIcrsDegrees": [
diff --git a/src/objects/m2-9/README.md b/src/objects/m2-9/README.md
index 1cdfaefeb71..55f02d7ea25 100644
--- a/src/objects/m2-9/README.md
+++ b/src/objects/m2-9/README.md
@@ -1,42 +1,16 @@
-# Twin Jet Nebula (M2–9)
+# Twin Jet Nebula
 
-One Hubble optical dataset displays an axially symmetric, image-conditioned emission model. **Depth and inclination are not measured.** The adopted physical scale remains substantially uncertain.
+Twin Jet Nebula as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Twin Jet Nebula volume](../m2-9-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Source | Role and limits |
-| --- | --- |
-| [Hubble/WFPC2, opo9738a](https://esahubble.org/images/opo9738a/) and [APOD 2004-02-01](https://apod.nasa.gov/apod/ap040201.html) | Same 1997 optical photograph, with [O I]/nitrogen/[O III] display colors; the pinned 800 × 525 JPEG supplies the image. |
-| [Wenger, Lorenz & Magnor (2013)](https://doi.org/10.1111/cgf.12216) | Independently implemented axial group-sparsity method; no author code or restricted downloadable volumes are used. |
-| [Image-frame record](source/image-frame.json) | Native hashes and cross-edition astrometry; caption-free 788 × 438 crop, 58.0350″ × 32.2766″. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m2-9.json) cites the position, distance and velocity that place it.
 
-The adopted **650 pc** distance follows [Sánchez Contreras et al. (2024), §2](https://arxiv.org/html/2411.03825v1#S2). [Corradi et al. (2011), abstract](https://arxiv.org/abs/1102.5634) report an expansion distance of 1300 ± 200 pc, which would double this model’s physical size. At 650 pc the displayed crop is about 0.183 pc wide, not the full nebula’s measured extent.
+## Processing
 
-The [stellar field](source/stellar-field.json) supplies seven Gaia sources in an authored 10 pc sphere, G < 14, using Bailer-Jones distance estimates with uncertainty intervals. The original four manually masked image points are a removal aid, not a catalogue or measured membership sample.
-
-Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
-
-## Evidence
-
-- [Delivery](source/delivery.json) retains the 144-slice symmetry result and adds the independently prepared catalogue field. This does not rerun or relabel the original separation as NOX.
-- The [fixed experiment report](../../../labs/nebula/models/m2-9/README.md) records synthetic hollow-shell and zero-regularization controls, real front/oblique inspection and the original test/build results. Source-image fit errors are not physical depth errors.
-- This provenance update makes no fresh cold-replay, independent scientific-review or material-acceptance claim. The historical external review timed out and was not completed.
+1. `pnpm prepare:objects --object=m2-9` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m2-9` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- Authored axis position and zero inclination select one of many possible depths from a single photograph.
-- Faint planar background, rings and directional color/brightness changes remain in oblique views. Photographic RGB is neither calibrated additive emission nor measured density.
-- The small working grid is a bounded method trial; finer source pixels alone cannot resolve the distance or symmetry ambiguity.
-
-<details>
-<summary>Methods and historical comparisons</summary>
-
-The [fixed lab account](../../../labs/nebula/models/m2-9/README.md) preserves crop, manual point masks, independent FISTA/proximal implementation, original timings and failed-view limitations. The [planetary-nebula method](../../../labs/nebula/docs/planetary-nebulae.md) describes the paper and its constraints. Common preparation is in the [nebula guide](../../../docs/nebulae/README.md).
-
-</details>
-
-## Compact delivery inputs
-
-The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
-
-Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m2-9/inventory.json b/src/objects/m2-9/inventory.json
index 40684c65ea6..2b8c6f43717 100644
--- a/src/objects/m2-9/inventory.json
+++ b/src/objects/m2-9/inventory.json
@@ -3,207 +3,51 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/hst-optical.webp",
+      "filename": "m2-9-dataset-hst-optical.webp",
       "bytes": 14756,
       "sha256": "72f7576c0a11938573b0e6d2d81a9f607abc3a7554eb0c7491c9cee37bc1db56"
     },
     {
       "location": "prepared",
-      "filename": "datasets.json",
-      "bytes": 183690,
-      "sha256": "74d647f86f204ce336ff3aed8536e7e30811d7417c43c1a4449477fb31a33c1c"
-    },
-    {
-      "location": "prepared",
-      "filename": "delivery.json",
-      "bytes": 4495,
-      "sha256": "b20f2efd0671fabae4f6ae3a570f94c9bee37c8a349f6d8c9be6f8de30ff6615"
-    },
-    {
-      "location": "prepared",
-      "filename": "hst-optical/atlases/x.webp",
-      "bytes": 960178,
-      "sha256": "b2791d685eec441c17fc958ad570921ac005501b75e1863f1aa92d324938bf4d"
-    },
-    {
-      "location": "prepared",
-      "filename": "hst-optical/atlases/y.webp",
-      "bytes": 559912,
-      "sha256": "f8e3901458d31bbef7950e13b0485577931aa55f85f58d0c5978495c3012f5f6"
-    },
-    {
-      "location": "prepared",
-      "filename": "hst-optical/atlases/z.webp",
-      "bytes": 591912,
-      "sha256": "0fdc832b3ad4073a86c3e5a2249f3e9b4a2788c9e0e219f220f97bd88f449a78"
-    },
-    {
-      "location": "prepared",
-      "filename": "hst-optical/impostors/view-00n.png",
-      "bytes": 81115,
-      "sha256": "962028f7d4468978fa47ac7d10306c4a69b963de981556f08c63da9797a1a12b"
-    },
-    {
-      "location": "prepared",
-      "filename": "hst-optical/impostors/view-00p.png",
-      "bytes": 81144,
-      "sha256": "b32ecef06817bd74fb03c92a236a3b7adec404d168116e2eaaa5b954cd2f5ccf"
-    },
-    {
-      "location": "prepared",
-      "filename": "hst-optical/impostors/view-0n0.png",
-      "bytes": 71905,
-      "sha256": "3af5ee55158ecf1f4b772c42708c620425d70a784bf89a341163768707d874c8"
-    },
-    {
-      "location": "prepared",
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 }
diff --git a/src/objects/m2-9/object.json b/src/objects/m2-9/object.json
index 60bc2f52538..e8a0c89b726 100644
--- a/src/objects/m2-9/object.json
+++ b/src/objects/m2-9/object.json
@@ -1,42 +1,96 @@
 {
   "schema": "cssearth-object@2",
   "id": "m2-9",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Twin Jet Nebula",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 2821622953513.5
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Twin Jet Nebula",
+      "systemName": "Milky Way",
+      "classification": "nebula",
+      "color": "#9a9a9a",
+      "distanceAu": 134072124.1,
+      "description": "The Twin Jet is a bipolar nebula with two opposing lobes.",
+      "aliases": [
+        "M2–9",
+        "PN M2-9"
+      ],
+      "order": 5140,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
         -4639854198945162000,
         -19190526609290568000,
-        -3531975474921165300
+        -3531975474921166000
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-        0.6868469990897411,
-        -0.4917021814714364,
-        -0.41252890291059086
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+        0,
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+        0.3977771559319137,
+        0.21752714908747986,
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-        ]
-      }
-    },
-    "preparation": {
-      "source": "source/delivery.json"
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
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+      "metersPerUnit": 9102009527462.902,
+      "bodyRadiusM": 2821622953513500
     }
   },
   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m2-9/source/content/object.json b/src/objects/m2-9/source/content/object.json
new file mode 100644
index 00000000000..86ea15eef24
--- /dev/null
+++ b/src/objects/m2-9/source/content/object.json
@@ -0,0 +1,91 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m2-9",
+  "displayName": "Twin Jet Nebula",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "650 pc",
+        "source": {
+          "catalogueId": "sanchez-contreras-2024",
+          "url": "https://arxiv.org/html/2411.03825v1",
+          "label": "S\u00e1nchez Contreras et al. A&A 692, A151 (2024)",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 256.4\u00b0, Dec -10.14\u00b0",
+        "source": {
+          "catalogueId": "hubble-opo9738a",
+          "url": "https://esahubble.org/media/archives/images/original/opo9738a.tif",
+          "label": "NASA/ESA Hubble 1997 image opo9738a; AVM sky astrometry",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "classification",
+        "label": "Classification",
+        "value": "Bipolar nebula",
+        "source": {
+          "catalogueId": "hubble-opo9738a",
+          "url": "https://esahubble.org/media/archives/images/original/opo9738a.tif",
+          "label": "NASA/ESA Hubble 1997 image opo9738a; AVM sky astrometry",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "hst-optical",
+    "controls": [
+      {
+        "id": "hst-optical",
+        "label": "Hubble \u00b7 optical",
+        "thumbnail": "m2-9-dataset-hst-optical.webp",
+        "volume": {
+          "objectId": "m2-9-volume",
+          "datasetId": "hst-optical",
+          "surface": "hst-optical"
+        },
+        "source": {
+          "id": "m2-9-volume-hst-optical",
+          "path": "../../m2-9-volume/source/manifest.json",
+          "url": "https://apod.nasa.gov/apod/ap040201.html"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "S\u00e1nchez Contreras et al. A&A 692, A151 (2024)",
+      "href": "https://arxiv.org/html/2411.03825v1"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "NASA/ESA Hubble 1997 image opo9738a; AVM sky astrometry",
+      "href": "https://esahubble.org/media/archives/images/original/opo9738a.tif"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://arxiv.org/html/2411.03825v1",
+      "credit": "S\u00e1nchez Contreras et al. A&A 692, A151 (2024)"
+    }
+  }
+}
diff --git a/src/objects/m2-9/source/manifest.json b/src/objects/m2-9/source/manifest.json
index 9e75402a899..39dabdbdc44 100644
--- a/src/objects/m2-9/source/manifest.json
+++ b/src/objects/m2-9/source/manifest.json
@@ -1,210 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "hst-optical",
-      "path": ".local/nebula-lab/research/wenger/m2-9-original.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://apod.nasa.gov/apod/ap040201.html",
-      "sourceUrl": "https://apod.nasa.gov/apod/ap040201.html",
-      "title": "Twin Jet Nebula · accepted APOD edition",
-      "credit": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
-      "displayCredit": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "hubble-opo9738a",
-            "role": "material",
-            "evidence": "src/objects/m2-9/source/image-frame.json#/acceptedImage"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "hst-optical",
+      "credit": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA; the default dataset's picture as the Twin Jet Nebula bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0",
-      "capture": {
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-            "evidence": "https://esahubble.org/images/opo9738a/"
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-      "path": "src/objects/m2-9/source/image-frame.json",
-      "origin": "https://arxiv.org/html/2411.03825v1",
-      "sourceUrl": "https://arxiv.org/html/2411.03825v1",
-      "title": "M2–9 angular frame and adopted distance",
-      "credit": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes.",
-      "sourceBinding": {
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-          }
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-      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "title": "Twin Jet Nebula surrounding Gaia DR3 stellar field",
-      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
-      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
-      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
-      "sourceBinding": {
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-      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
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-      }
-    },
-    {
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-      "path": "src/objects/m2-9/source/image-frame.json",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
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-    {
-      "id": "retained-evidence-6",
-      "path": "src/objects/m2-9/source/provenance-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-7",
-      "path": "src/objects/m2-9/source/replay-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m2-9-volume/source/manifest.json)."
       }
     }
   ],
-  "generatedIntermediates": [
-    {
-      "id": "compact-compact-model-json",
-      "path": "src/objects/m2-9/source/compact/model.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
-    {
-      "id": "compact-compact-emission-1-f32-gz",
-      "path": "src/objects/m2-9/source/compact/emission-1.f32.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
+  "documents": [
     {
-      "id": "compact-compact-emission-2-f32-gz",
-      "path": "src/objects/m2-9/source/compact/emission-2.f32.gz",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "compact-compact-emission-0-f32-gz",
-      "path": "src/objects/m2-9/source/compact/emission-0.f32.gz",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "compact-compact-README-md",
-      "path": "src/objects/m2-9/source/compact/README.md",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice model/material input or replay record; published inputs are separately bound in this manifest and retained provenance."
-      }
+      "path": "preparation/navigation.json"
     }
   ]
 }
diff --git a/src/objects/m2-9/source/preparation/navigation.json b/src/objects/m2-9/source/preparation/navigation.json
new file mode 100644
index 00000000000..ab0221125bf
--- /dev/null
+++ b/src/objects/m2-9/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m2-9",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m2-9/source/presentation/context.png b/src/objects/m2-9/source/presentation/context.png
new file mode 100644
index 00000000000..57e7d0c2bf8
Binary files /dev/null and b/src/objects/m2-9/source/presentation/context.png differ
diff --git a/src/objects/m2-9/source/presentation/solar-system.json b/src/objects/m2-9/source/presentation/solar-system.json
new file mode 100644
index 00000000000..b22bb1f8f35
--- /dev/null
+++ b/src/objects/m2-9/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m2-9",
+  "displayName": "Twin Jet Nebula",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 2821622953513.5,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m2-9/text.json b/src/objects/m2-9/text.json
new file mode 100644
index 00000000000..3960e0a4465
--- /dev/null
+++ b/src/objects/m2-9/text.json
@@ -0,0 +1,44 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m2-9",
+  "card": {
+    "text": "The Twin Jet is a bipolar nebula with two opposing lobes.",
+    "sources": [
+      {
+        "catalogueId": "sanchez-contreras-2024",
+        "url": "https://arxiv.org/html/2411.03825v1",
+        "label": "Sánchez Contreras et al. A&A 692, A151 (2024)",
+        "checked": "2026-10-01",
+        "locator": "distance: 650 pc"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "The Twin Jet is a bipolar nebula with two opposing lobes. Published distance estimates range from 650 to about 1,300 parsecs.",
+    "sources": [
+      {
+        "catalogueId": "sanchez-contreras-2024",
+        "url": "https://arxiv.org/html/2411.03825v1",
+        "label": "Sánchez Contreras et al. A&A 692, A151 (2024)",
+        "checked": "2026-10-01",
+        "locator": "distance: 650 pc"
+      }
+    ]
+  },
+  "datasets": {
+    "hst-optical": {
+      "title": "The Twin Jet Nebula in visible light",
+      "detail": "788 × 438 px",
+      "summary": "Hubble optical colors on an assumed symmetric cloud; depth and inclination are not measured.",
+      "sources": [
+        {
+          "catalogueId": "hubble-opo9738a",
+          "url": "https://apod.nasa.gov/apod/ap040201.html",
+          "label": "Twin Jet Nebula · accepted APOD edition; Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
+          "checked": "2026-10-01",
+          "locator": "Twin Jet Nebula · accepted APOD edition"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m31-layers/README.md b/src/objects/m31-layers/README.md
new file mode 100644
index 00000000000..0e7d308fcdd
--- /dev/null
+++ b/src/objects/m31-layers/README.md
@@ -0,0 +1,103 @@
+# Andromeda Galaxy (M31)
+
+A survey photograph of M31, cleaned of the Milky Way stars and companion galaxies in front of it and colour-tied to its
+measured integrated colour, is spread through a modelled disc and a round bulge. Published catalogues of its HII regions,
+Cepheids, supernova remnants, planetary nebulae and stars are drawn as dots on the same disc. Image brightness does not
+measure per-pixel distance.
+
+## Sources
+
+| Selected source | Input and meaning |
+| --- | --- |
+| [Panorama of Spiral Galaxy, M31](https://noirlab.edu/public/images/noao-m31lgs_ubvIha/) | [Record](../../sources/noirlab-noao-m31lgs.json). The Local Group Survey's Mayall 4-meter panorama in U, B, V, I and H-alpha: the photograph's main input. |
+| [Wide-field view of the Andromeda Galaxy](https://esahubble.org/images/heic1112f/) | [Record](../../sources/esa-heic1112f.json). ESA/Hubble's DSS2 view (`heic1112f`), filling the survey mosaic's notches and the outer disc. |
+| [Dorman et al. (2013)](https://arxiv.org/abs/1310.4179) | [Record](../../sources/dorman-2013-m31-structural-decomposition.json). Table 3's bulge-plus-disc fit: a Sérsic bulge (half-light radius 0.778 kpc, n = 1.917) and an exponential disc (scale length 5.76 kpc). |
+| [Dalcanton et al. (2023)](https://arxiv.org/abs/2304.08613) | [Record](../../sources/dalcanton-2023-m31-thick-disk.json). Red-giant scale height 770 ± 80 pc, taken by the planetary nebulae. |
+| [Braun (1991)](https://doi.org/10.1086/169954) | [Record](../../sources/braun-1991-m31-neutral-gas.json). The H I layer's scale height, 182 + 16 R pc (R in kpc), taken by the young dots, stars and diffuse slabs. |
+| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | [Gaia record](../../sources/gaia-2023-dr3.json), [Ren record](../../sources/ren-2021-m31-m33-red-supergiants.json). The 148,335 sources within 2.3° of M31 that Ren et al.'s criterion marks as Milky Way stars. |
+| [Local Volume Database v1.1.1](../../sources/lvdb-v1-1-1.json) | M32's and NGC 205's centres and half-light ellipses (structure from McConnachie 2012). |
+| [RC3](../../sources/rc3-1991.json) | NGC 224's total B-V, 0.92 ± 0.02 as observed (CDS VII/155). |
+| [Azimlu et al. (2011)](https://doi.org/10.1088/0004-6256/142/4/139) | [HII regions](source/azimlu-hii/points.json): 3,961 regions (CDS J/AJ/142/139). |
+| [Kodric et al. (2013)](https://doi.org/10.1088/0004-6256/145/4/106) | [Cepheids](source/pandromeda-cepheids/points.json): 2,009 Cepheids from Pan-STARRS1 PAndromeda (CDS J/AJ/145/106). |
+| [Lee & Lee (2014)](https://doi.org/10.1088/0004-637X/786/2/130) | [Supernova remnant candidates](source/lee-snr/points.json): 156 (CDS J/ApJ/786/130). |
+| [Merrett et al. (2006)](https://doi.org/10.1111/j.1365-2966.2006.10268.x) | [Planetary nebulae](source/merrett-pne/points.json) (CDS J/MNRAS/369/120). |
+| [Massey et al. (2006)](https://doi.org/10.1086/503256) | [Stars](source/lggs-stars/points.json): the Local Group Galaxies Survey's 371,781 M31 stars with UBVRI photometry (CDS J/AJ/131/2478). |
+| [Johnson et al. (2015)](https://doi.org/10.1088/0004-637X/802/2/127) | [Star clusters](source/phat-clusters/points.json): 2,753 PHAT clusters, north-east third of the disc only; prepared, not drawn. |
+| [Ibata et al. (2005)](https://arxiv.org/abs/astro-ph/0504164) | [Stellar extent](source/stellar-extent.json): stars measured out to about 40 kpc; inside it M31's caption hides. |
+
+## The photograph
+
+[`compose-optical.mts`](../../../packages/bake/authoring/m31/compose-optical.mts) builds the image-layer input
+(`source/optical-composite.jpg`, 7560 × 2520 px). The DSS2 view fills the panorama's
+mosaic notches and the outer disc, histogram-matched to the survey with a 2′ fade inside the mosaic's edge. The
+composite is not tracked; `restore-source-inputs.mts` restores it from `source-cache/m31/src/objects/m31-layers/source/optical-composite.jpg`.
+
+The image-layer bake ([`prepare.ts`](../../../packages/bake/src/image-layers/prepare.ts)) then:
+
+- **Removes foreground stars** ([`foreground.ts`](../../../packages/bake/src/image-layers/foreground.ts)), replacing
+  30,084 of the 52,363 Gaia foreground stars in the image with the light around them.
+- **Removes M32 and NGC 205** the same way, out to 8.4 and 3 half-light radii.
+- **Ties the colour** to RC3's B-V of 0.92 by scaling red and blue in linear light (gains red 0.896, blue 1.154).
+- **Splits bulge from disc** by Dorman et al.'s fitted share of the light at each sky position. Where the photograph is
+  saturated, the fit's own light stands in.
+
+## Disc, bulge and depth
+
+- **Disc:** inclination 74.0° (from Dorman et al.'s disc ellipticity), line of nodes 37.7° (Chemin et al. 2009). It
+  ends at 27.2 kpc, where the DSS2 frame stops, fading from 20.4 kpc so no frame edge shows.
+- **Thickness:** 32 diffuse slabs follow an exponential of 342 pc, Braun's value at the 10 kpc ring, chosen because
+  770 pc visibly smeared the photograph seen from above.
+- **Bulge:** an oblate spheroid with Dorman et al.'s Sérsic profile, deprojected (Prugniel & Simien 1997), with intrinsic
+  axis ratio 0.695. The view from the Sun is the photograph; seen from above the bulge stays round.
+- **Levels:** none; the photograph is shown as published apart from the steps above.
+
+## Dots and stars
+
+The catalogues give sky positions only. [`prepare-catalogue-points.mts`](../../../packages/bake/cli/prepare-catalogue-points.mts)
+places each object on the image layers' disc ([`disc.ts`](../../../packages/bake/src/image-layers/disc.ts)), and
+[`merge-catalogue-points.mts`](../../../packages/bake/cli/merge-catalogue-points.mts) joins them into the
+[dots](source/dots/merge.json) and the [stars](source/stars/merge.json):
+
+| Catalogue | Drawn | Left out |
+| --- | --- | --- |
+| HII regions (Azimlu et al. 2011) | 3,961 | none |
+| Cepheids (Kodric et al. 2013) | 1,992 | 17 beyond the photograph |
+| Supernova remnant candidates (Lee & Lee 2014) | 156 | none |
+| Planetary nebulae (Merrett et al. 2006) | 2,463, 355 of them in the bulge | 111 beyond the photograph, 726 flagged by the authors |
+| Stars (Massey et al. 2006) | 4,969 | 18,959 Gaia foreground stars; then one in 71 is kept |
+
+Each dot keeps its place in the disc at a height drawn from its population's layer: Braun's gas layer for young objects,
+770 pc for planetary nebulae. Dots are toned by the photograph beneath them so they sit in the galaxy's light; stars are
+coloured by their measured B-V. These are presentation choices.
+
+## Evidence
+
+- [Composite report](evidence/2026-09-29/optical-composite.json): pixels from each input (6,849,915 from the survey,
+  10,004,307 from the fill) and the histogram-matching curve.
+- Bytes: 170 layer images, 3.09 MB. The midplane texture's WebP alpha quality 60 shows no pixel differences under
+  pixelmatch at threshold 0.1 against lossless alpha, at half the bytes.
+
+## Known problems
+
+- **One flat disc and one bulge fit:** the warp to 86° beyond 30 kpc, the bar and the boxy inner bulge are not
+  modelled. The fit's position angle (44.4°) differs from the disc's line of nodes (37.7°). Dorman et al.'s halo term is
+  left out of the share.
+- **Saturated core:** 26,239 pixels carry the fit's light, not the photograph's.
+- **Fill:** the DSS2 fill is blurrier than the survey; a fading seam may show up close in the outer disc.
+- **Depth is modelled:** the slabs and bulge are copies of the photograph along our sight lines, so side views are
+  approximations; the dots' heights are drawn, not measured.
+- **Remaining stars:** 1,080 foreground stars on extended light are left, as are Gaia stars too faint to show,
+  uncatalogued ones and M31's own compact sources. Seen at a slant they still stretch a little. The survey could not
+  resolve the crowded bulge, so its stars thin out toward the centre.
+
+<details>
+<summary>Reproduction</summary>
+
+Restore `source/lggs-panorama.jpg` from the NOIRLab Large JPEG, `source/gaia-dr3-foreground.csv` from the query in the
+Gaia record and `source/lggs-stars/table4.dat.gz` from CDS, then run `node packages/bake/authoring/m31/compose-optical.mts`,
+`node packages/bake/cli/prepare-image-layers.mts src/objects/m31`, the catalogue commands for each bank and the two
+merges. The [shared bake guide](../../../labs/nebula/docs/baking.md) describes the image-layer bank; the
+[manifest](source/manifest.json), [provenance](source/provenance.json) and [investigation ledger](investigations.json)
+record the inputs.
+
+</details>
diff --git a/src/objects/m31/evidence/2026-09-29/optical-composite.json b/src/objects/m31-layers/evidence/2026-09-29/optical-composite.json
similarity index 100%
rename from src/objects/m31/evidence/2026-09-29/optical-composite.json
rename to src/objects/m31-layers/evidence/2026-09-29/optical-composite.json
diff --git a/src/objects/m31-layers/inventory.json b/src/objects/m31-layers/inventory.json
new file mode 100644
index 00000000000..b2d4e5bdc8b
--- /dev/null
+++ b/src/objects/m31-layers/inventory.json
@@ -0,0 +1,1055 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/optical.webp",
+      "bytes": 3062,
+      "sha256": "89d466a644c9087c83a4e64934302cf9b6d0dec95f4eee632a19337591bee1d4"
+    },
+    {
+      "location": "prepared",
+      "filename": "dots.bin",
+      "bytes": 91105,
+      "sha256": "2d1213b82c1d540108d684d191d599564b6ae7eccc31ed71373d5bbc157288d8"
+    },
+    {
+      "location": "prepared",
+      "filename": "image-layers.json",
+      "bytes": 148659,
+      "sha256": "91c76e94a1afd2cd2cba8de6e52a709f6d926646477d010bfc7490847a7525a8"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-00.webp",
+      "bytes": 330,
+      "sha256": "de49ceff0c5aef88867acc5a1401c53017082a6a765ba7c137ddc511bc90b7dd"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-01.webp",
+      "bytes": 542,
+      "sha256": "a77ae8b75fb421ce004b8dcce0d5f7b868e15e0b5d5ff0e4c9df8ded3776faeb"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-02.webp",
+      "bytes": 634,
+      "sha256": "91d3439602dc78df233b65d7fb240ba754b6d4aa44de1f86a09ee809246e8ef2"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-03.webp",
+      "bytes": 702,
+      "sha256": "071c51226fd3c177f17db21a6f1f7cee55db723def8bf252a8360560ced7f6d6"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-04.webp",
+      "bytes": 826,
+      "sha256": "0f0b2dd4f381685e1f0caf8f6cf976e9897a73e4ff0f3220089715cd2cfae7c7"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-05.webp",
+      "bytes": 944,
+      "sha256": "11b82366b040fc951f8628af537d27f423389843d84b7ba09806b3bffeceecb2"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-06.webp",
+      "bytes": 980,
+      "sha256": "48490b83fbf04c6e8c95097fbd82bd5719904259c7f0192e40e7cee0aafe5a31"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-07.webp",
+      "bytes": 992,
+      "sha256": "a0520d7ba63160464e8f76905dd68558b93cd9240db37f46066bbe1481c0f4fd"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-08.webp",
+      "bytes": 974,
+      "sha256": "c90b1db861f7ffd3dd3659c3f7f321bcc4a43e578c392dbf7727f51b9cec3be1"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-09.webp",
+      "bytes": 954,
+      "sha256": "6ef4090c97420b9d99e12a141b05774343a7ca3134cdfcf22bcf20d3bd146cb1"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-10.webp",
+      "bytes": 876,
+      "sha256": "5faf998904ded9bb4b9438a0e313f2c8bebf9578f8b897996df69ad7b161b5cb"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-11.webp",
+      "bytes": 890,
+      "sha256": "fe16bee4403033157ce46b4d9862b9fe1ff8ed8efd4bbd98b3c76964b2d5938f"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-12.webp",
+      "bytes": 888,
+      "sha256": "70f71899b0dcf7c0331525d8ac183797174ad152d0f39d6caf6441559c8ae2c4"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-13.webp",
+      "bytes": 906,
+      "sha256": "2fd5aa345e67c9708a5e0f55719128a5e6bcaf61213e6ef9b489090e8856781f"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-14.webp",
+      "bytes": 972,
+      "sha256": "fbe8d57bfe4933519acb30503506c6acaf1fb8245e8d2c95cd6e0b75fbd52df8"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-15.webp",
+      "bytes": 992,
+      "sha256": "a428554658d7c5dfd4e26ddd5f061a19f680d460c5770ba9fb9dff6acb973740"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-16.webp",
+      "bytes": 974,
+      "sha256": "587e0cec7fbd1888944d6fa4700fef568cd45091f1bbec7b4f2d28f2c44c7148"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-17.webp",
+      "bytes": 1104,
+      "sha256": "8b4f13143f35ec070dfbd2278cafe2de9cee287bf180629111616c87e76aba64"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-18.webp",
+      "bytes": 1044,
+      "sha256": "398fe3ec6d17633a670f73372a8ba00f2af53024acf8f7441b4a71f6ac374866"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-19.webp",
+      "bytes": 894,
+      "sha256": "064f6dc61f26243aa787b2fde8384337169a6147b93f906cbdc462ba8ba12758"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-20.webp",
+      "bytes": 720,
+      "sha256": "2f84687a637d4707a8e7eccc8b455acd9b86f5e52d2be548c0ef4772c364478c"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-21.webp",
+      "bytes": 612,
+      "sha256": "0737519541723d3f381d12c3fd04fa9a9bb35ed12df0327244008f2c17f56484"
+    },
+    {
+      "location": "prepared",
+      "filename": "layers/bulge-x-22.webp",
+      "bytes": 516,
+      "sha256": "08c67536969c8eb23dd477b61baa88484a3c6fcf4038c094a3402c389e75f2d4"
+    },
+    {
+      "location": "prepared",
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diff --git a/src/objects/m31/investigations.json b/src/objects/m31-layers/investigations.json
similarity index 87%
rename from src/objects/m31/investigations.json
rename to src/objects/m31-layers/investigations.json
index 3a04e317712..977e6d1c7be 100644
--- a/src/objects/m31/investigations.json
+++ b/src/objects/m31-layers/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "m31",
+  "objectId": "m31-layers",
   "entries": [
     {
       "id": "dataset-optical",
@@ -8,8 +8,8 @@
       "status": "included",
       "finding": "High-resolution crop/resample derived offline from the publisher Large JPEG. Selected for image-layer display. The wide DSS2 field contains the full visible galaxy and substantial surrounding sky, foreground stars and background objects. Those released sources are retained. Faint halo coverage is limited by the survey composite. This ledger consolidates existing records; no fresh source survey or visual qualification was performed.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31-layers/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31-layers/source/recipe.json"
       ]
     },
     {
@@ -18,8 +18,8 @@
       "status": "included",
       "finding": "The observation is decomposed by local compactness into one high-frequency midplane residual and a diffuse component. Only diffuse optical depth is distributed through 32 normalized parametric slabs; cross-axis textures sample the same separable field. This is not measured per-pixel depth. Adopted thickness: 1 kpc. The cited geometry reference is Chemin, Carignan & Foster 2009, arXiv:0909.3846. Selection does not independently qualify those adopted values.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31-layers/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31-layers/source/recipe.json"
       ]
     },
     {
@@ -27,8 +27,8 @@
       "survey": "scientific-registration",
       "status": "unresolved",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31-layers/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m31-layers/source/recipe.json"
       ]
     }
   ]
diff --git a/src/objects/m31-layers/object.json b/src/objects/m31-layers/object.json
new file mode 100644
index 00000000000..bf0536adef9
--- /dev/null
+++ b/src/objects/m31-layers/object.json
@@ -0,0 +1,47 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "m31-layers",
+  "type": "image-layer-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        1.7692007869096456e+22,
+        3.337796281257527e+21,
+        1.5797893138497694e+22
+      ],
+      "localToReferenceXyzw": [
+        0.26331188380369325,
+        0.31763369940217334,
+        0.7012875471847867,
+        0.5813531293588998
+      ],
+      "metersPerUnit": 30856775814913670000,
+      "boundsUnits": {
+        "min": [
+          -22.28731515949301,
+          -25.381110577192132,
+          -32.120800654900336
+        ],
+        "max": [
+          21.141812397717374,
+          26.81327906792017,
+          33.1202840389268
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/recipe.json"
+    },
+    "cataloguePoints": [
+      "stars",
+      "dots"
+    ],
+    "host": "m31"
+  },
+  "prepared": {
+    "format": "cssearth-image-layer-bank@1",
+    "url": "prepared/image-layers.json"
+  }
+}
diff --git a/src/objects/m31/source/azimlu-hii/points.json b/src/objects/m31-layers/source/azimlu-hii/points.json
similarity index 100%
rename from src/objects/m31/source/azimlu-hii/points.json
rename to src/objects/m31-layers/source/azimlu-hii/points.json
diff --git a/src/objects/m31/source/azimlu-hii/table2.dat b/src/objects/m31-layers/source/azimlu-hii/table2.dat
similarity index 100%
rename from src/objects/m31/source/azimlu-hii/table2.dat
rename to src/objects/m31-layers/source/azimlu-hii/table2.dat
diff --git a/src/objects/m31/source/disc-geometry.json b/src/objects/m31-layers/source/disc-geometry.json
similarity index 95%
rename from src/objects/m31/source/disc-geometry.json
rename to src/objects/m31-layers/source/disc-geometry.json
index 9fe7aa2e01a..8a22b96e262 100644
--- a/src/objects/m31/source/disc-geometry.json
+++ b/src/objects/m31-layers/source/disc-geometry.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-disc-geometry@1",
-  "objectId": "m31",
+  "objectId": "m31-layers",
   "centre": {
     "raDeg": 10.684708333333333,
     "decDeg": 41.26875,
@@ -10,7 +10,10 @@
   },
   "inclinationDeg": 77.7,
   "positionAngleDeg": 38,
-  "radialRangeKpc": [10, 25],
+  "radialRangeKpc": [
+    10,
+    25
+  ],
   "quote": "Considering the galaxy disk between 10 and 25 kpc with an average inclination of 77.7° and position angle 38°",
   "source": "corbelli-2010-m31-hi-warp",
   "choice": "One flat plane from Corbelli et al. (2010), a joint tilted-ring fit of the H I velocity field. Its 10-25 kpc range holds the 10 kpc star-forming ring, where most of the HII regions, Cepheids and young clusters lie, and its inclination agrees with the stellar-disc measurement below. The same paper also calls the inner-disk values i = 77.6°, θ = 38° (Sect. 2); the 0.1° difference is recorded, not resolved.",
@@ -28,7 +31,10 @@
       "inclinationUncertaintyDeg": 1.1,
       "positionAngleDeg": 37.7,
       "positionAngleUncertaintyDeg": 0.9,
-      "radialRangeKpc": [6, 27],
+      "radialRangeKpc": [
+        6,
+        27
+      ],
       "tracer": "H I tilted rings from DRAO data.",
       "agreement": "Position angle agrees; inclination 3.4° lower. Corbelli et al. (2010, Sect. 2.2) discuss the difference and find their 77° closer to optical surface photometry."
     },
diff --git a/src/objects/m31/source/dots/merge.json b/src/objects/m31-layers/source/dots/merge.json
similarity index 100%
rename from src/objects/m31/source/dots/merge.json
rename to src/objects/m31-layers/source/dots/merge.json
diff --git a/src/objects/m31/source/lee-snr/points.json b/src/objects/m31-layers/source/lee-snr/points.json
similarity index 100%
rename from src/objects/m31/source/lee-snr/points.json
rename to src/objects/m31-layers/source/lee-snr/points.json
diff --git a/src/objects/m31/source/lee-snr/table3.dat b/src/objects/m31-layers/source/lee-snr/table3.dat
similarity index 100%
rename from src/objects/m31/source/lee-snr/table3.dat
rename to src/objects/m31-layers/source/lee-snr/table3.dat
diff --git a/src/objects/m31/source/lggs-stars/points.json b/src/objects/m31-layers/source/lggs-stars/points.json
similarity index 100%
rename from src/objects/m31/source/lggs-stars/points.json
rename to src/objects/m31-layers/source/lggs-stars/points.json
diff --git a/src/objects/m31-layers/source/manifest.json b/src/objects/m31-layers/source/manifest.json
new file mode 100644
index 00000000000..675b9f30c56
--- /dev/null
+++ b/src/objects/m31-layers/source/manifest.json
@@ -0,0 +1,345 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "optical",
+      "path": "src/objects/m31-layers/source/optical-composite.jpg",
+      "origin": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/",
+      "sourceUrl": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/",
+      "title": "Panorama of Spiral Galaxy, M31, with the Wide-field view of the Andromeda Galaxy in its gaps",
+      "credit": "Local Group Survey Team and T.A. Rector (University of Alaska Anchorage)/NOIRLab/NSF/AURA; outer disc: ESA/Hubble & Digitized Sky Survey 2, acknowledgment Davide De Martin (ESA/Hubble)",
+      "displayCredit": "NOIRLab · ESA/Hubble",
+      "acquisition": "Built offline by packages/bake/authoring/m31/compose-optical.mts from two publisher images: the NOIRLab Large JPEG of the Local Group Survey panorama (source/lggs-panorama.jpg, restored from its origin) and the ESA/Hubble heic1112f crop (source/source.jpg). Both are resampled into one frame along the major axis at 2 arcsec per pixel; the DSS2 view fills the survey mosaic's notches and the outer disc, histogram-matched to the survey over the pixels both cover (source/optical-composite.json). The hash identifies the local composite, not a calibrated scientific array.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noao-m31lgs",
+            "role": "material",
+            "evidence": "src/objects/m31-layers/source/provenance.json"
+          },
+          {
+            "catalogueId": "esa-heic1112f",
+            "role": "material",
+            "evidence": "src/objects/m31-layers/source/provenance.json"
+          }
+        ]
+      },
+      "dependencies": [],
+      "generator": "packages/bake/authoring/m31/compose-optical.mts",
+      "datasetId": "optical",
+      "license": "CC-BY-4.0 (both images); provider terms: https://noirlab.edu/public/copyright/ and https://esahubble.org/copyright/. Retain the complete recorded credits.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "unresolved",
+            "label": "Local Group Survey (KPNO Mayall 4-m, Mosaic)",
+            "evidence": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/",
+            "reason": "The publisher's colour composite of ten Mosaic pointings in U, B, V, I and H-alpha; the retained record does not identify the individual exposures."
+          },
+          {
+            "kind": "unresolved",
+            "label": "Digitized Sky Survey 2",
+            "evidence": "https://esahubble.org/images/heic1112f/",
+            "reason": "The published display combines DSS2 red and blue survey plates. The retained record does not identify the individual plate exposures and acquisition instruments; ESA/Hubble is the publisher, not evidence of Hubble telescope acquisition."
+          }
+        ]
+      }
+    },
+    {
+      "id": "azimlu-hii-table2",
+      "path": "src/objects/m31-layers/source/azimlu-hii/table2.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/142/139/table2.dat",
+      "title": "A new catalog of H II regions in M31, table2.dat",
+      "credit": "M. Azimlu, R. Marciniak, P. Barmby; AJ 142, 139",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through azimlu-hii/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "azimlu-2011-m31-hii-regions",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/142/139/table2.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "lee-snr-table3",
+      "path": "src/objects/m31-layers/source/lee-snr/table3.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/786/130/table3.dat",
+      "title": "A new optical survey of supernova remnant candidates in M31, table3.dat",
+      "credit": "J. H. Lee, M. G. Lee; ApJ 786, 130",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through lee-snr/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "lee-2014-m31-snr-candidates",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/786/130/table3.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "lggs-stars-table4",
+      "path": "src/objects/m31-layers/source/lggs-stars/table4.dat.gz",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table4.dat.gz",
+      "title": "A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33, table4.dat.gz",
+      "credit": "P. Massey, K. A. G. Olsen, P. W. Hodge, S. B. Strong, G. H. Jacoby, W. Schlingman, R. C. Smith; AJ 131, 2478",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through lggs-stars/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "massey-2006-lggs-m33-stars",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table4.dat.gz"
+          }
+        ]
+      }
+    },
+    {
+      "id": "merrett-pne-table3",
+      "path": "src/objects/m31-layers/source/merrett-pne/table3.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/MNRAS/369/120/table3.dat",
+      "title": "A deep kinematic survey of planetary nebulae in the Andromeda galaxy using the Planetary Nebula Spectrograph, table3.dat",
+      "credit": "H. R. Merrett, M. R. Merrifield, N. G. Douglas, K. Kuijken, A. J. Romanowsky, N. R. Napolitano, M. Arnaboldi, M. Capaccioli, K. C. Freeman, O. Gerhard, L. Coccato, D. Carter, N. W. Evans, M. I. Wilkinson, C. Halliday, T. J. Bridges; MNRAS 369, 120",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through merrett-pne/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "merrett-2006-m31-planetary-nebulae",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/MNRAS/369/120/table3.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "pandromeda-cepheids-table",
+      "path": "src/objects/m31-layers/source/pandromeda-cepheids/table.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/145/106/table.dat",
+      "title": "Properties of M31. II. A Cepheid disk sample derived from the first year of PS1 PAndromeda data, table.dat",
+      "credit": "M. Kodric, A. Riffeser, U. Hopp, S. Seitz, J. Koppenhoefer, R. Bender, C. Goessl, J. Snigula, C. -. Lee, C. -. Ngeow, K. C. Chambers, E. A. Magnier, P. A. Price, W. S. Burgett, K. W. Hodapp, N. Kaiser, R. -. Kudritzki; AJ 145, 106",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through pandromeda-cepheids/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kodric-2013-m31-cepheids",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/145/106/table.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "phat-clusters-table2",
+      "path": "src/objects/m31-layers/source/phat-clusters/table2.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/802/127/table2.dat",
+      "title": "PHAT stellar cluster survey. II. Andromeda Project cluster catalog, table2.dat",
+      "credit": "L. C. Johnson, A. C. Seth, J. J. Dalcanton, M. L. Wallace, R. J. Simpson, C. J. Lintott, A. Kapadia, E. D. Skillman, N. Caldwell, M. Fouesneau, D. R. Weisz, B. F. Williams, L. C. Beerman, D. A. Gouliermis, A. Sarajedini; ApJ 802, 127",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through phat-clusters/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "johnson-2015-phat-clusters",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/802/127/table2.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "heic1112f-crop",
+      "path": "src/objects/m31-layers/source/source.jpg",
+      "origin": "https://esahubble.org/images/heic1112f/",
+      "sourceUrl": "https://esahubble.org/images/heic1112f/",
+      "title": "Wide-field view of the Andromeda Galaxy",
+      "credit": "ESA/Hubble & Digitized Sky Survey 2. Acknowledgment: Davide De Martin (ESA/Hubble)",
+      "displayCredit": "ESA/Hubble",
+      "acquisition": "High-resolution crop/resample derived offline from the publisher Large JPEG; packages/bake/authoring/m31/compose-optical.mts fills the optical composite's notches and outer disc from it.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esa-heic1112f",
+            "role": "material",
+            "evidence": "src/objects/m31-layers/source/provenance.json"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "CC-BY-4.0; provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit."
+    }
+  ],
+  "documents": [
+    {
+      "id": "recipe",
+      "path": "src/objects/m31-layers/source/recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Image-layer preparation recipe",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "provenance",
+      "path": "src/objects/m31-layers/source/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Published image interpretation and acquisition record",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "presentation",
+      "path": "src/objects/m31-layers/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Dataset presentation and prepared-bank bindings",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "stellar-extent",
+      "path": "src/objects/m31-layers/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "ibata-2005-m31-extended-disk",
+            "role": "reference",
+            "evidence": "https://arxiv.org/abs/astro-ph/0504164"
+          }
+        ]
+      }
+    },
+    {
+      "id": "disc-geometry",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/disc-geometry.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored disc orientation that places catalogue dots on the photograph's disc; its values cite their papers inside the file.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "azimlu-hii-points",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/azimlu-hii/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A new catalog of H II regions in M31 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "dots-merge",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/dots/merge.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "lee-snr-points",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/lee-snr/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A new optical survey of supernova remnant candidates in M31 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "lggs-stars-points",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/lggs-stars/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "merrett-pne-points",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/merrett-pne/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A deep kinematic survey of planetary nebulae in the Andromeda galaxy using the Planetary Nebula Spectrograph rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "pandromeda-cepheids-points",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/pandromeda-cepheids/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the Properties of M31. II. A Cepheid disk sample derived from the first year of PS1 PAndromeda data rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "phat-clusters-points",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/phat-clusters/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the PHAT stellar cluster survey. II. Andromeda Project cluster catalog rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "stars-merge",
+      "kind": "authored-document",
+      "path": "src/objects/m31-layers/source/stars/merge.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/m31/source/merrett-pne/points.json b/src/objects/m31-layers/source/merrett-pne/points.json
similarity index 100%
rename from src/objects/m31/source/merrett-pne/points.json
rename to src/objects/m31-layers/source/merrett-pne/points.json
diff --git a/src/objects/m31/source/merrett-pne/table3.dat b/src/objects/m31-layers/source/merrett-pne/table3.dat
similarity index 100%
rename from src/objects/m31/source/merrett-pne/table3.dat
rename to src/objects/m31-layers/source/merrett-pne/table3.dat
diff --git a/src/objects/m31/source/pandromeda-cepheids/points.json b/src/objects/m31-layers/source/pandromeda-cepheids/points.json
similarity index 100%
rename from src/objects/m31/source/pandromeda-cepheids/points.json
rename to src/objects/m31-layers/source/pandromeda-cepheids/points.json
diff --git a/src/objects/m31/source/pandromeda-cepheids/table.dat b/src/objects/m31-layers/source/pandromeda-cepheids/table.dat
similarity index 100%
rename from src/objects/m31/source/pandromeda-cepheids/table.dat
rename to src/objects/m31-layers/source/pandromeda-cepheids/table.dat
diff --git a/src/objects/m31/source/phat-clusters/points.json b/src/objects/m31-layers/source/phat-clusters/points.json
similarity index 100%
rename from src/objects/m31/source/phat-clusters/points.json
rename to src/objects/m31-layers/source/phat-clusters/points.json
diff --git a/src/objects/m31/source/phat-clusters/table2.dat b/src/objects/m31-layers/source/phat-clusters/table2.dat
similarity index 100%
rename from src/objects/m31/source/phat-clusters/table2.dat
rename to src/objects/m31-layers/source/phat-clusters/table2.dat
diff --git a/src/objects/m31/source/presentation.json b/src/objects/m31-layers/source/presentation.json
similarity index 86%
rename from src/objects/m31/source/presentation.json
rename to src/objects/m31-layers/source/presentation.json
index 65e70bd76cf..0a3bc993dbb 100644
--- a/src/objects/m31/source/presentation.json
+++ b/src/objects/m31-layers/source/presentation.json
@@ -1,19 +1,19 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m31",
+  "objectId": "m31-layers",
   "name": "Andromeda Galaxy",
   "defaultDataset": "optical",
   "bank": {
-    "path": "src/objects/m31/prepared/image-layers.json"
+    "path": "src/objects/m31-layers/prepared/image-layers.json"
   },
   "recipes": [
     {
       "id": "image-layer-recipe",
-      "path": "src/objects/m31/source/recipe.json"
+      "path": "src/objects/m31-layers/source/recipe.json"
     },
     {
       "id": "source-evidence",
-      "path": "src/objects/m31/source/provenance.json"
+      "path": "src/objects/m31-layers/source/provenance.json"
     }
   ],
   "sharedInputs": [],
@@ -49,7 +49,7 @@
       ],
       "input": "optical",
       "preview": {
-        "path": "src/objects/m31/source/optical-composite.jpg",
+        "path": "src/objects/m31-layers/source/optical-composite.jpg",
         "url": "https://storage.noirlab.edu/media/archives/images/large/noao-m31lgs_ubvIha.jpg"
       }
     }
diff --git a/src/objects/m31/source/provenance.json b/src/objects/m31-layers/source/provenance.json
similarity index 100%
rename from src/objects/m31/source/provenance.json
rename to src/objects/m31-layers/source/provenance.json
diff --git a/src/objects/m31/source/recipe.json b/src/objects/m31-layers/source/recipe.json
similarity index 99%
rename from src/objects/m31/source/recipe.json
rename to src/objects/m31-layers/source/recipe.json
index 6caa0881af6..df6b01cc5d1 100644
--- a/src/objects/m31/source/recipe.json
+++ b/src/objects/m31-layers/source/recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-image-layer-recipe@1",
-  "id": "m31",
+  "id": "m31-layers",
   "source": {
     "path": "optical-composite.jpg",
     "dimensions": [
diff --git a/src/objects/m31/source/source.jpg b/src/objects/m31-layers/source/source.jpg
similarity index 100%
rename from src/objects/m31/source/source.jpg
rename to src/objects/m31-layers/source/source.jpg
diff --git a/src/objects/m31/source/stars/merge.json b/src/objects/m31-layers/source/stars/merge.json
similarity index 100%
rename from src/objects/m31/source/stars/merge.json
rename to src/objects/m31-layers/source/stars/merge.json
diff --git a/src/objects/m31/source/stellar-extent.json b/src/objects/m31-layers/source/stellar-extent.json
similarity index 95%
rename from src/objects/m31/source/stellar-extent.json
rename to src/objects/m31-layers/source/stellar-extent.json
index 8df0315386e..f56c8391a2e 100644
--- a/src/objects/m31/source/stellar-extent.json
+++ b/src/objects/m31-layers/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "m31",
+  "objectId": "m31-layers",
   "radiusPc": 40000,
   "definition": "Radius from the M31 centre to which its extended rotating disc-like structure spans, from a Keck/DEIMOS kinematic survey of more than 2800 stars; scattered detections reach 70 kpc.",
   "quote": "The stellar structure spans radii from 15 kpc out to ~40 kpc",
diff --git a/src/objects/m31/README.md b/src/objects/m31/README.md
index e40dd4b0023..0cc03e49586 100644
--- a/src/objects/m31/README.md
+++ b/src/objects/m31/README.md
@@ -1,103 +1,16 @@
-# Andromeda Galaxy (M31)
+# Andromeda Galaxy
 
-A survey photograph of M31, cleaned of the Milky Way stars and companion galaxies in front of it and colour-tied to its
-measured integrated colour, is spread through a modelled disc and a round bulge. Published catalogues of its HII regions,
-Cepheids, supernova remnants, planetary nebulae and stars are drawn as dots on the same disc. Image brightness does not
-measure per-pixel distance.
+Andromeda Galaxy as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Andromeda Galaxy image layers](../m31-layers/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Selected source | Input and meaning |
-| --- | --- |
-| [Panorama of Spiral Galaxy, M31](https://noirlab.edu/public/images/noao-m31lgs_ubvIha/) | [Record](../../sources/noirlab-noao-m31lgs.json). The Local Group Survey's Mayall 4-meter panorama in U, B, V, I and H-alpha: the photograph's main input. |
-| [Wide-field view of the Andromeda Galaxy](https://esahubble.org/images/heic1112f/) | [Record](../../sources/esa-heic1112f.json). ESA/Hubble's DSS2 view (`heic1112f`), filling the survey mosaic's notches and the outer disc. |
-| [Dorman et al. (2013)](https://arxiv.org/abs/1310.4179) | [Record](../../sources/dorman-2013-m31-structural-decomposition.json). Table 3's bulge-plus-disc fit: a Sérsic bulge (half-light radius 0.778 kpc, n = 1.917) and an exponential disc (scale length 5.76 kpc). |
-| [Dalcanton et al. (2023)](https://arxiv.org/abs/2304.08613) | [Record](../../sources/dalcanton-2023-m31-thick-disk.json). Red-giant scale height 770 ± 80 pc, taken by the planetary nebulae. |
-| [Braun (1991)](https://doi.org/10.1086/169954) | [Record](../../sources/braun-1991-m31-neutral-gas.json). The H I layer's scale height, 182 + 16 R pc (R in kpc), taken by the young dots, stars and diffuse slabs. |
-| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | [Gaia record](../../sources/gaia-2023-dr3.json), [Ren record](../../sources/ren-2021-m31-m33-red-supergiants.json). The 148,335 sources within 2.3° of M31 that Ren et al.'s criterion marks as Milky Way stars. |
-| [Local Volume Database v1.1.1](../../sources/lvdb-v1-1-1.json) | M32's and NGC 205's centres and half-light ellipses (structure from McConnachie 2012). |
-| [RC3](../../sources/rc3-1991.json) | NGC 224's total B-V, 0.92 ± 0.02 as observed (CDS VII/155). |
-| [Azimlu et al. (2011)](https://doi.org/10.1088/0004-6256/142/4/139) | [HII regions](source/azimlu-hii/points.json): 3,961 regions (CDS J/AJ/142/139). |
-| [Kodric et al. (2013)](https://doi.org/10.1088/0004-6256/145/4/106) | [Cepheids](source/pandromeda-cepheids/points.json): 2,009 Cepheids from Pan-STARRS1 PAndromeda (CDS J/AJ/145/106). |
-| [Lee & Lee (2014)](https://doi.org/10.1088/0004-637X/786/2/130) | [Supernova remnant candidates](source/lee-snr/points.json): 156 (CDS J/ApJ/786/130). |
-| [Merrett et al. (2006)](https://doi.org/10.1111/j.1365-2966.2006.10268.x) | [Planetary nebulae](source/merrett-pne/points.json) (CDS J/MNRAS/369/120). |
-| [Massey et al. (2006)](https://doi.org/10.1086/503256) | [Stars](source/lggs-stars/points.json): the Local Group Galaxies Survey's 371,781 M31 stars with UBVRI photometry (CDS J/AJ/131/2478). |
-| [Johnson et al. (2015)](https://doi.org/10.1088/0004-637X/802/2/127) | [Star clusters](source/phat-clusters/points.json): 2,753 PHAT clusters, north-east third of the disc only; prepared, not drawn. |
-| [Ibata et al. (2005)](https://arxiv.org/abs/astro-ph/0504164) | [Stellar extent](source/stellar-extent.json): stars measured out to about 40 kpc; inside it M31's caption hides. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m31.json) cites the position, distance and velocity that place it.
 
-## The photograph
+## Processing
 
-[`compose-optical.mts`](../../../packages/bake/authoring/m31/compose-optical.mts) builds the image-layer input
-(`source/optical-composite.jpg`, 7560 × 2520 px). The DSS2 view fills the panorama's
-mosaic notches and the outer disc, histogram-matched to the survey with a 2′ fade inside the mosaic's edge. The
-composite is not tracked; `restore-source-inputs.mts` restores it from `source-cache/m31/src/objects/m31/source/optical-composite.jpg`.
-
-The image-layer bake ([`prepare.ts`](../../../packages/bake/src/image-layers/prepare.ts)) then:
-
-- **Removes foreground stars** ([`foreground.ts`](../../../packages/bake/src/image-layers/foreground.ts)), replacing
-  30,084 of the 52,363 Gaia foreground stars in the image with the light around them.
-- **Removes M32 and NGC 205** the same way, out to 8.4 and 3 half-light radii.
-- **Ties the colour** to RC3's B-V of 0.92 by scaling red and blue in linear light (gains red 0.896, blue 1.154).
-- **Splits bulge from disc** by Dorman et al.'s fitted share of the light at each sky position. Where the photograph is
-  saturated, the fit's own light stands in.
-
-## Disc, bulge and depth
-
-- **Disc:** inclination 74.0° (from Dorman et al.'s disc ellipticity), line of nodes 37.7° (Chemin et al. 2009). It
-  ends at 27.2 kpc, where the DSS2 frame stops, fading from 20.4 kpc so no frame edge shows.
-- **Thickness:** 32 diffuse slabs follow an exponential of 342 pc, Braun's value at the 10 kpc ring, chosen because
-  770 pc visibly smeared the photograph seen from above.
-- **Bulge:** an oblate spheroid with Dorman et al.'s Sérsic profile, deprojected (Prugniel & Simien 1997), with intrinsic
-  axis ratio 0.695. The view from the Sun is the photograph; seen from above the bulge stays round.
-- **Levels:** none; the photograph is shown as published apart from the steps above.
-
-## Dots and stars
-
-The catalogues give sky positions only. [`prepare-catalogue-points.mts`](../../../packages/bake/cli/prepare-catalogue-points.mts)
-places each object on the image layers' disc ([`disc.ts`](../../../packages/bake/src/image-layers/disc.ts)), and
-[`merge-catalogue-points.mts`](../../../packages/bake/cli/merge-catalogue-points.mts) joins them into the
-[dots](source/dots/merge.json) and the [stars](source/stars/merge.json):
-
-| Catalogue | Drawn | Left out |
-| --- | --- | --- |
-| HII regions (Azimlu et al. 2011) | 3,961 | none |
-| Cepheids (Kodric et al. 2013) | 1,992 | 17 beyond the photograph |
-| Supernova remnant candidates (Lee & Lee 2014) | 156 | none |
-| Planetary nebulae (Merrett et al. 2006) | 2,463, 355 of them in the bulge | 111 beyond the photograph, 726 flagged by the authors |
-| Stars (Massey et al. 2006) | 4,969 | 18,959 Gaia foreground stars; then one in 71 is kept |
-
-Each dot keeps its place in the disc at a height drawn from its population's layer: Braun's gas layer for young objects,
-770 pc for planetary nebulae. Dots are toned by the photograph beneath them so they sit in the galaxy's light; stars are
-coloured by their measured B-V. These are presentation choices.
-
-## Evidence
-
-- [Composite report](evidence/2026-09-29/optical-composite.json): pixels from each input (6,849,915 from the survey,
-  10,004,307 from the fill) and the histogram-matching curve.
-- Bytes: 170 layer images, 3.09 MB. The midplane texture's WebP alpha quality 60 shows no pixel differences under
-  pixelmatch at threshold 0.1 against lossless alpha, at half the bytes.
+1. `pnpm prepare:objects --object=m31` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m31` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- **One flat disc and one bulge fit:** the warp to 86° beyond 30 kpc, the bar and the boxy inner bulge are not
-  modelled. The fit's position angle (44.4°) differs from the disc's line of nodes (37.7°). Dorman et al.'s halo term is
-  left out of the share.
-- **Saturated core:** 26,239 pixels carry the fit's light, not the photograph's.
-- **Fill:** the DSS2 fill is blurrier than the survey; a fading seam may show up close in the outer disc.
-- **Depth is modelled:** the slabs and bulge are copies of the photograph along our sight lines, so side views are
-  approximations; the dots' heights are drawn, not measured.
-- **Remaining stars:** 1,080 foreground stars on extended light are left, as are Gaia stars too faint to show,
-  uncatalogued ones and M31's own compact sources. Seen at a slant they still stretch a little. The survey could not
-  resolve the crowded bulge, so its stars thin out toward the centre.
-
-<details>
-<summary>Reproduction</summary>
-
-Restore `source/lggs-panorama.jpg` from the NOIRLab Large JPEG, `source/gaia-dr3-foreground.csv` from the query in the
-Gaia record and `source/lggs-stars/table4.dat.gz` from CDS, then run `node packages/bake/authoring/m31/compose-optical.mts`,
-`node packages/bake/cli/prepare-image-layers.mts src/objects/m31`, the catalogue commands for each bank and the two
-merges. The [shared bake guide](../../../labs/nebula/docs/baking.md) describes the image-layer bank; the
-[manifest](source/manifest.json), [provenance](source/provenance.json) and [investigation ledger](investigations.json)
-record the inputs.
-
-</details>
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m31/inventory.json b/src/objects/m31/inventory.json
index b3998469e4b..d83ede0abb4 100644
--- a/src/objects/m31/inventory.json
+++ b/src/objects/m31/inventory.json
@@ -3,1053 +3,51 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/optical.webp",
+      "filename": "m31-dataset-optical.webp",
       "bytes": 3062,
       "sha256": "89d466a644c9087c83a4e64934302cf9b6d0dec95f4eee632a19337591bee1d4"
     },
     {
       "location": "prepared",
-      "filename": "dots.bin",
-      "bytes": 91105,
-      "sha256": "2d1213b82c1d540108d684d191d599564b6ae7eccc31ed71373d5bbc157288d8"
+      "filename": "content.json",
+      "bytes": 1953,
+      "sha256": "a5d4834fa7ef9211c2854ae22612c79da04c1ccc1705a5a450afa42f15070e2f"
     },
     {
       "location": "prepared",
-      "filename": "image-layers.json",
-      "bytes": 296669,
-      "sha256": "ecbb0113a52819e033975c233ff834f2b3e4fdd90068586a271c9723f5e5fde0"
+      "filename": "controls.json",
+      "bytes": 452,
+      "sha256": "e804994e649fd0e5ab8bd1bb2cfb9df634126ed44c46fe4b25b1f2557594801d"
     },
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-      "bytes": 330,
-      "sha256": "de49ceff0c5aef88867acc5a1401c53017082a6a765ba7c137ddc511bc90b7dd"
+      "filename": "datasets.json",
+      "bytes": 545,
+      "sha256": "d7c148c5753104c4c7f77bc2630c2a3994406e21aeb8957a0630a0ebcab390ef"
     },
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-      "bytes": 542,
-      "sha256": "a77ae8b75fb421ce004b8dcce0d5f7b868e15e0b5d5ff0e4c9df8ded3776faeb"
+      "filename": "runtime.json",
+      "bytes": 4577,
+      "sha256": "985a5b9aa52db5b03edff87f6c7790e149a10da7cd51d0dcc1b0378e7d3aa773"
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-      "bytes": 634,
-      "sha256": "91d3439602dc78df233b65d7fb240ba754b6d4aa44de1f86a09ee809246e8ef2"
+      "filename": "scene.json",
+      "bytes": 3870,
+      "sha256": "4c79e7b5779cb442958e66ecc5909186701f983af75c24c714061952b4824081"
     },
     {
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-      "filename": "layers/bulge-x-03.webp",
-      "bytes": 702,
-      "sha256": "071c51226fd3c177f17db21a6f1f7cee55db723def8bf252a8360560ced7f6d6"
+      "filename": "text.json",
+      "bytes": 1644,
+      "sha256": "7631fa1cc2e07a3c617478bf02f8f20ecefd66ac9256720e6cba3716ccbd1e16"
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 }
diff --git a/src/objects/m31/object.json b/src/objects/m31/object.json
index 0c58cfb2a8e..6679952231f 100644
--- a/src/objects/m31/object.json
+++ b/src/objects/m31/object.json
@@ -1,46 +1,95 @@
 {
   "schema": "cssearth-object@2",
   "id": "m31",
-  "type": "image-layer-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Andromeda Galaxy",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 771419395372841900
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "M 31",
+      "systemName": "Local Group",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 160112461100,
+      "description": "A galaxy 776,247 parsecs away.",
+      "aliases": [
+        "Andromeda"
+      ],
+      "order": 5141,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
-        1.7692007869096456e+22,
-        3.337796281257527e+21,
-        1.5797893138497694e+22
+        1.7692007682599817e+22,
+        3.337796246072839e+21,
+        1.5797892971967474e+22
       ],
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-        0.26331188380369325,
-        0.31763369940217334,
-        0.7012875471847867,
-        0.5813531293588998
+      "presentationToReference": [
+        0.8841998226395167,
+        0,
+        0.4671088456069389,
+        0.4285639868782094,
+        0.3977771559319137,
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-    },
-    "preparation": {
-      "source": "source/recipe.json"
-    },
-    "cataloguePoints": [
-      "stars",
-      "dots"
-    ]
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 2488449662493038000,
+      "bodyRadiusM": 771419395372841800000
+    }
   },
   "prepared": {
-    "format": "cssearth-image-layer-bank@1",
-    "url": "prepared/image-layers.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m31/source/content/object.json b/src/objects/m31/source/content/object.json
new file mode 100644
index 00000000000..1a33cea1d49
--- /dev/null
+++ b/src/objects/m31/source/content/object.json
@@ -0,0 +1,91 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m31",
+  "displayName": "M 31",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "776.2 kpc (\u221221,150 / +21,750 pc)",
+        "source": {
+          "catalogueId": "publication-savino2022apj-938-101s",
+          "url": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S",
+          "label": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 10.68\u00b0, Dec 41.27\u00b0",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "membership",
+        "label": "Membership",
+        "value": "Local group, Andromeda",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "optical",
+    "controls": [
+      {
+        "id": "optical",
+        "label": "NOIRLab \u00b7 optical",
+        "thumbnail": "m31-dataset-optical.webp",
+        "volume": {
+          "objectId": "m31-layers",
+          "datasetId": "optical",
+          "surface": "optical"
+        },
+        "source": {
+          "id": "m31-layers-optical",
+          "path": "../../m31-layers/source/manifest.json",
+          "url": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure",
+      "href": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+      "href": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S",
+      "credit": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure"
+    }
+  }
+}
diff --git a/src/objects/m31/source/manifest.json b/src/objects/m31/source/manifest.json
index 43359c9743e..9e278f8f039 100644
--- a/src/objects/m31/source/manifest.json
+++ b/src/objects/m31/source/manifest.json
@@ -1,345 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "optical",
-      "path": "src/objects/m31/source/optical-composite.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/",
-      "sourceUrl": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/",
-      "title": "Panorama of Spiral Galaxy, M31, with the Wide-field view of the Andromeda Galaxy in its gaps",
-      "credit": "Local Group Survey Team and T.A. Rector (University of Alaska Anchorage)/NOIRLab/NSF/AURA; outer disc: ESA/Hubble & Digitized Sky Survey 2, acknowledgment Davide De Martin (ESA/Hubble)",
-      "displayCredit": "NOIRLab · ESA/Hubble",
-      "acquisition": "Built offline by packages/bake/authoring/m31/compose-optical.mts from two publisher images: the NOIRLab Large JPEG of the Local Group Survey panorama (source/lggs-panorama.jpg, restored from its origin) and the ESA/Hubble heic1112f crop (source/source.jpg). Both are resampled into one frame along the major axis at 2 arcsec per pixel; the DSS2 view fills the survey mosaic's notches and the outer disc, histogram-matched to the survey over the pixels both cover (source/optical-composite.json). The hash identifies the local composite, not a calibrated scientific array.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "noirlab-noao-m31lgs",
-            "role": "material",
-            "evidence": "src/objects/m31/source/provenance.json"
-          },
-          {
-            "catalogueId": "esa-heic1112f",
-            "role": "material",
-            "evidence": "src/objects/m31/source/provenance.json"
-          }
-        ]
-      },
-      "dependencies": [],
-      "generator": "packages/bake/authoring/m31/compose-optical.mts",
-      "datasetId": "optical",
+      "credit": "Local Group Survey Team and T.A. Rector (University of Alaska Anchorage)/NOIRLab/NSF/AURA; outer disc: ESA/Hubble & Digitized Sky Survey 2, acknowledgment Davide De Martin (ESA/Hubble); the default dataset's picture as the Andromeda Galaxy bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0 (both images); provider terms: https://noirlab.edu/public/copyright/ and https://esahubble.org/copyright/. Retain the complete recorded credits.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "Local Group Survey (KPNO Mayall 4-m, Mosaic)",
-            "evidence": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/",
-            "reason": "The publisher's colour composite of ten Mosaic pointings in U, B, V, I and H-alpha; the retained record does not identify the individual exposures."
-          },
-          {
-            "kind": "unresolved",
-            "label": "Digitized Sky Survey 2",
-            "evidence": "https://esahubble.org/images/heic1112f/",
-            "reason": "The published display combines DSS2 red and blue survey plates. The retained record does not identify the individual plate exposures and acquisition instruments; ESA/Hubble is the publisher, not evidence of Hubble telescope acquisition."
-          }
-        ]
-      }
-    },
-    {
-      "id": "azimlu-hii-table2",
-      "path": "src/objects/m31/source/azimlu-hii/table2.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/142/139/table2.dat",
-      "title": "A new catalog of H II regions in M31, table2.dat",
-      "credit": "M. Azimlu, R. Marciniak, P. Barmby; AJ 142, 139",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through azimlu-hii/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "azimlu-2011-m31-hii-regions",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/142/139/table2.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "lee-snr-table3",
-      "path": "src/objects/m31/source/lee-snr/table3.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/786/130/table3.dat",
-      "title": "A new optical survey of supernova remnant candidates in M31, table3.dat",
-      "credit": "J. H. Lee, M. G. Lee; ApJ 786, 130",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through lee-snr/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "lee-2014-m31-snr-candidates",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/786/130/table3.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "lggs-stars-table4",
-      "path": "src/objects/m31/source/lggs-stars/table4.dat.gz",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table4.dat.gz",
-      "title": "A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33, table4.dat.gz",
-      "credit": "P. Massey, K. A. G. Olsen, P. W. Hodge, S. B. Strong, G. H. Jacoby, W. Schlingman, R. C. Smith; AJ 131, 2478",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through lggs-stars/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "massey-2006-lggs-m33-stars",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table4.dat.gz"
-          }
-        ]
-      }
-    },
-    {
-      "id": "merrett-pne-table3",
-      "path": "src/objects/m31/source/merrett-pne/table3.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/MNRAS/369/120/table3.dat",
-      "title": "A deep kinematic survey of planetary nebulae in the Andromeda galaxy using the Planetary Nebula Spectrograph, table3.dat",
-      "credit": "H. R. Merrett, M. R. Merrifield, N. G. Douglas, K. Kuijken, A. J. Romanowsky, N. R. Napolitano, M. Arnaboldi, M. Capaccioli, K. C. Freeman, O. Gerhard, L. Coccato, D. Carter, N. W. Evans, M. I. Wilkinson, C. Halliday, T. J. Bridges; MNRAS 369, 120",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through merrett-pne/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "merrett-2006-m31-planetary-nebulae",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/MNRAS/369/120/table3.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "pandromeda-cepheids-table",
-      "path": "src/objects/m31/source/pandromeda-cepheids/table.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/145/106/table.dat",
-      "title": "Properties of M31. II. A Cepheid disk sample derived from the first year of PS1 PAndromeda data, table.dat",
-      "credit": "M. Kodric, A. Riffeser, U. Hopp, S. Seitz, J. Koppenhoefer, R. Bender, C. Goessl, J. Snigula, C. -. Lee, C. -. Ngeow, K. C. Chambers, E. A. Magnier, P. A. Price, W. S. Burgett, K. W. Hodapp, N. Kaiser, R. -. Kudritzki; AJ 145, 106",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through pandromeda-cepheids/points.json.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kodric-2013-m31-cepheids",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/145/106/table.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "phat-clusters-table2",
-      "path": "src/objects/m31/source/phat-clusters/table2.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/802/127/table2.dat",
-      "title": "PHAT stellar cluster survey. II. Andromeda Project cluster catalog, table2.dat",
-      "credit": "L. C. Johnson, A. C. Seth, J. J. Dalcanton, M. L. Wallace, R. J. Simpson, C. J. Lintott, A. Kapadia, E. D. Skillman, N. Caldwell, M. Fouesneau, D. R. Weisz, B. F. Williams, L. C. Beerman, D. A. Gouliermis, A. Sarajedini; ApJ 802, 127",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through phat-clusters/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "johnson-2015-phat-clusters",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/802/127/table2.dat"
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m31-layers/source/manifest.json)."
       }
-    },
-    {
-      "id": "heic1112f-crop",
-      "path": "src/objects/m31/source/source.jpg",
-      "origin": "https://esahubble.org/images/heic1112f/",
-      "sourceUrl": "https://esahubble.org/images/heic1112f/",
-      "title": "Wide-field view of the Andromeda Galaxy",
-      "credit": "ESA/Hubble & Digitized Sky Survey 2. Acknowledgment: Davide De Martin (ESA/Hubble)",
-      "displayCredit": "ESA/Hubble",
-      "acquisition": "High-resolution crop/resample derived offline from the publisher Large JPEG; packages/bake/authoring/m31/compose-optical.mts fills the optical composite's notches and outer disc from it.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esa-heic1112f",
-            "role": "material",
-            "evidence": "src/objects/m31/source/provenance.json"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "CC-BY-4.0; provider terms: https://esahubble.org/copyright/. Retain the complete recorded credit."
     }
   ],
   "documents": [
     {
-      "id": "recipe",
-      "path": "src/objects/m31/source/recipe.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Image-layer preparation recipe",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "provenance",
-      "path": "src/objects/m31/source/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Published image interpretation and acquisition record",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "presentation",
-      "path": "src/objects/m31/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Dataset presentation and prepared-bank bindings",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "stellar-extent",
-      "path": "src/objects/m31/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "ibata-2005-m31-extended-disk",
-            "role": "reference",
-            "evidence": "https://arxiv.org/abs/astro-ph/0504164"
-          }
-        ]
-      }
-    },
-    {
-      "id": "disc-geometry",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/disc-geometry.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored disc orientation that places catalogue dots on the photograph's disc; its values cite their papers inside the file.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "azimlu-hii-points",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/azimlu-hii/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A new catalog of H II regions in M31 rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "dots-merge",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/dots/merge.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "lee-snr-points",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/lee-snr/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A new optical survey of supernova remnant candidates in M31 rows drawn as dots.",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "lggs-stars-points",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/lggs-stars/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33 rows drawn as dots.",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "merrett-pne-points",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/merrett-pne/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A deep kinematic survey of planetary nebulae in the Andromeda galaxy using the Planetary Nebula Spectrograph rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "pandromeda-cepheids-points",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/pandromeda-cepheids/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the Properties of M31. II. A Cepheid disk sample derived from the first year of PS1 PAndromeda data rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "phat-clusters-points",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/phat-clusters/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the PHAT stellar cluster survey. II. Andromeda Project cluster catalog rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "stars-merge",
-      "kind": "authored-document",
-      "path": "src/objects/m31/source/stars/merge.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/m31/source/preparation/navigation.json b/src/objects/m31/source/preparation/navigation.json
new file mode 100644
index 00000000000..e087a1b1a1b
--- /dev/null
+++ b/src/objects/m31/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m31",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m31/source/presentation/context.png b/src/objects/m31/source/presentation/context.png
new file mode 100644
index 00000000000..8ffcca73d78
Binary files /dev/null and b/src/objects/m31/source/presentation/context.png differ
diff --git a/src/objects/m31/source/presentation/solar-system.json b/src/objects/m31/source/presentation/solar-system.json
new file mode 100644
index 00000000000..5a9e9f593aa
--- /dev/null
+++ b/src/objects/m31/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m31",
+  "displayName": "Andromeda Galaxy",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 7.714193953728419e+17,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m31/text.json b/src/objects/m31/text.json
new file mode 100644
index 00000000000..c57a46944c5
--- /dev/null
+++ b/src/objects/m31/text.json
@@ -0,0 +1,44 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m31",
+  "card": {
+    "text": "A galaxy 776,247 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-savino2022apj-938-101s",
+        "url": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S",
+        "label": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure",
+        "checked": "2026-10-01",
+        "locator": "distance: 776.2 kpc (−21,150 / +21,750 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 776,247 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-savino2022apj-938-101s",
+        "url": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S",
+        "label": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure",
+        "checked": "2026-10-01",
+        "locator": "distance: 776.2 kpc (−21,150 / +21,750 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "optical": {
+      "title": "Panorama of Spiral Galaxy, M31",
+      "detail": "7560 × 2520 px",
+      "summary": "Visible-light survey image on an approximate depth model with a round bulge; individual depths are not measured.",
+      "sources": [
+        {
+          "catalogueId": "noirlab-noao-m31lgs",
+          "url": "https://noirlab.edu/public/images/noao-m31lgs_ubvIha/",
+          "label": "Panorama of Spiral Galaxy, M31, with the Wide-field view of the Andromeda Galaxy in its gaps; Local Group Survey Team and T.A. Rector (University of Alaska Anchorage)/NOIRLab/NSF/AURA; outer disc: ESA/Hubble & Digitized Sky Survey 2, acknowledgment Davide De Martin (ESA/Hubble)",
+          "checked": "2026-10-01",
+          "locator": "Panorama of Spiral Galaxy, M31, with the Wide-field view of the Andromeda Galaxy in its gaps"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m33-layers/README.md b/src/objects/m33-layers/README.md
new file mode 100644
index 00000000000..496d98078f7
--- /dev/null
+++ b/src/objects/m33-layers/README.md
@@ -0,0 +1,68 @@
+# Triangulum Galaxy (M33)
+
+A publisher optical image supplies the color of a disc whose depth follows a published scale height, with M33's catalogued objects and stars drawn as dots on it. Image brightness does not measure per-pixel distance.
+
+## Sources
+
+| Selected source | Input and meaning |
+| --- | --- |
+| [VST snaps a very detailed view of the Triangulum Galaxy](https://www.eso.org/public/images/eso1424a/) | `eso1424a`; 4000 × 3355 pixels; publisher JPEG. |
+| Geometry reference | Corbelli et al. 2014, arXiv:1409.2665. Adopted parameters remain in the [recipe](source/recipe.json); exact source-field qualification is unresolved. |
+| [McConnachie et al. (2010)](https://arxiv.org/abs/1009.2804) | [Stellar extent](source/stellar-extent.json): M33's red-giant substructure reaches projected radii of about 40 kpc. Inside 40 kpc M33's caption hides. It marks where stars are still measured, not a boundary. |
+| [Hodge et al. (1999)](https://doi.org/10.1086/316374) | [HII regions](source/hodge-hii/points.json): 1,272 regions new in 1999, from H-alpha images (CDS J/PASP/111/685). The 1,066 regions of earlier catalogues, the brightest among them, are not in this table. |
+| [Pellerin & Macri (2011)](https://doi.org/10.1088/0067-0049/193/2/26) | [Cepheids](source/pellerin-cepheids/points.json): 563 Cepheids of the M33 Synoptic Stellar Survey main sample (CDS J/ApJS/193/26). |
+| [Long et al. (2010)](https://doi.org/10.1088/0067-0049/187/2/495) | [Supernova remnants](source/long-snr/points.json): 137 remnants and candidates (CDS J/ApJS/187/495). |
+| [Ciardullo et al. (2004)](https://doi.org/10.1086/423414) | [Planetary nebulae](source/ciardullo-pne/points.json): 152 candidates from [O III] imaging (CDS J/ApJ/614/167). Its adopted disc scale height gives the dots and the photograph their depth. |
+| [Sarajedini & Mancone (2007)](https://doi.org/10.1086/518835) | [Star clusters](source/sarajedini-clusters/points.json): the 255 of 451 candidates the authors class as clusters (CDS J/AJ/134/447). |
+| [Massey et al. (2006)](https://doi.org/10.1086/503256) | [Stars](source/lggs-stars/points.json): 146,622 stars of the Local Group Galaxies Survey with UBVRI photometry (CDS J/AJ/131/2478, `table5.dat.gz`). |
+| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | Foreground stars: the 8,330 Gaia DR3 sources within 0.75° of M33's centre that Ren et al.'s criterion marks as Milky Way stars (query in the [Gaia DR3 record](../../sources/gaia-2023-dr3.json)). |
+| [Koch et al. (2018)](https://doi.org/10.1093/mnras/sty1674) | [Disc geometry](source/disc-geometry.json): inclination 55.08° ± 1.56° and position angle 201.12° ± 0.47° from a fit to the whole H I velocity field (Table 2). |
+
+The catalogues give sky positions only, so each object is placed where its sight line crosses the midplane of the disc the image layers are baked on (`frame.placement: image-layer-disc`, [`disc.ts`](../../../packages/bake/src/image-layers/disc.ts)), as M31's are. [`merge-catalogue-points.mts`](../../../packages/bake/cli/merge-catalogue-points.mts) joins them into two banks the app draws over the image layers, the [stars](source/stars/merge.json) under the [dots](source/dots/merge.json):
+
+| Catalogue | Drawn | Left out |
+| --- | --- | --- |
+| HII regions (Hodge et al. 1999) | 1,272 | none |
+| Cepheids (Pellerin & Macri 2011) | 562 | 1 beyond the photograph |
+| Supernova remnants (Long et al. 2010) | 137 | none |
+| Planetary nebulae (Ciardullo et al. 2004) | 150 | 2 beyond the photograph |
+| Star clusters (Sarajedini & Mancone 2007) | 255 | 196 the authors class as stellar, galaxy, unknown or on a chip gap |
+| LGGS stars (Massey et al. 2006) | 4,890 | 4,130 Gaia foreground stars; 706 beyond the photograph; then one in 29 is kept |
+
+Every dot keeps its place in the disc and moves along the disc's axis to a height drawn from an isothermal sheet, sech²(z/z0) with z0 = 175 pc: the scale height Ciardullo et al. (2004, Sect. 6) adopt for M33's planetary nebulae, the only one these sources state (at least ±25%). Young tracers are thinner in disc galaxies, so for HII regions, Cepheids and clusters it is an upper value. Half the dots lie within 100 pc of the midplane, 90% within 253 pc. The spread is published; no dot's own height is measured, and the draw is seeded so a bake repeats it.
+
+Ren et al. (2021, Sect. 3.2) call a star foreground when its Gaia parallax, measured to better than 20%, puts it within 50 kpc, or its proper motion in either coordinate exceeds 0.2 mas/yr (500 km/s at M33) plus 2σ, measured to better than 20%. The same criterion is applied to Gaia DR3 (they used DR2), and an LGGS star within 1 arcsec of a foreground source is left out.
+
+One LGGS star in 29, in catalogue order, keeps 4,890 of 141,786 inside the renderer's 5,000-dot bank and thins every region alike, so the density contrast stays the survey's. The survey is limited by crowding in the centre, so there its density is a floor.
+
+Each star takes its measured B−V (observed, not dereddened) through the app's catalogue star colour; the other catalogues take the Milky Way colour for their kind of object, as M31's do. Each catalogue dot (not the stars) takes its tone from the photograph's brightness under it (never below 15%) and moves halfway from its kind's colour to the photograph's colour there. All are mixed halfway to white and raised to the power 1.6. These are presentation choices. Dots are drawn only inside the image layers' 8.7 kpc support radius, so every dot sits on the photograph.
+
+The dots use the image layers' inclination (54°) and line of nodes (22.5°), so that they sit on the photograph. The published [disc geometry](source/disc-geometry.json) of Koch et al. (2018), from arXiv:1806.11218v2, is 1.1° and 1.4° from the recipe's. One flat plane ignores the warp that Corbelli et al. (2014) find beyond the optical disc.
+
+### The photograph's disc
+
+The photograph's frame reaches only 8.7 kpc into the disc on its tightest side, so the disc ends there and fades from 6.5 kpc (`supportRadiusKpc` 8.7, `supportTaperFraction` 0.75). The 32 diffuse slabs follow the same sech²(z/175 pc) profile as the dots, over ±3 z0 (1.05 kpc). They are baked 80 pixels across, so they hold the photograph's low-frequency light and no knots; the midplane layer keeps the full detail.
+
+The image is publisher-prepared display RGB, not common calibrated flux or a qualified natural-color measurement. Observation dates are not retained in the selected records.
+
+The [manifest](source/manifest.json) records complete credits, reuse terms and canonical source bindings. The [source record](source/provenance.json) identifies the provider product and local conversion. The [investigation ledger](investigations.json) records the selected routes and unresolved qualification.
+
+## Evidence
+
+Measured in the app with dots hidden: tilting from face-on to just before edge-on dims the photograph's total light from 3.4 to about 0.5 (screen luminance above the sky), and the edge-on layers that take over show 0.16. A brighter edge-on bake (up to 5×, still thin) was tried and not adopted.
+
+## Known problems
+
+- The 68 by 57 arcminute VST field contains the full bright optical disk. The larger warped neutral-hydrogen outskirts are not represented.
+- Foreground stars and background objects remain in the image. Compact features are not classified or individually placed in three dimensions; no point-source removal is applied.
+- The photograph fades as it tilts toward edge-on: its layers cannot brighten with the longer path through the disc, and edge-on it is a faint strip.
+- Exact source fields, uncertainties and coordinate epoch for the image layers' adopted orientation and placement remain incompletely recorded. No independent sky-registration or measured-depth acceptance is available here.
+
+<details>
+<summary>Image-layer preparation and reproduction</summary>
+
+The observation is decomposed by local compactness into one high-frequency midplane residual and a diffuse component. Only diffuse optical depth is distributed through 32 slabs following the published sech² profile above; cross-axis textures sample the same separable field. This is not measured per-pixel depth.
+
+Lossy WebP encoding can differ across platforms, so a new replay must compare its output against the published bank and report differences. The [shared bake guide](../../../labs/nebula/docs/baking.md) describes reproduction.
+
+</details>
diff --git a/src/objects/m33-layers/inventory.json b/src/objects/m33-layers/inventory.json
new file mode 100644
index 00000000000..bd66527021a
--- /dev/null
+++ b/src/objects/m33-layers/inventory.json
@@ -0,0 +1,551 @@
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+      "filename": "stars.bin",
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+}
diff --git a/src/objects/m33/investigations.json b/src/objects/m33-layers/investigations.json
similarity index 86%
rename from src/objects/m33/investigations.json
rename to src/objects/m33-layers/investigations.json
index f37f8fc4cd3..a15a75deb6d 100644
--- a/src/objects/m33/investigations.json
+++ b/src/objects/m33-layers/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "m33",
+  "objectId": "m33-layers",
   "entries": [
     {
       "id": "dataset-optical",
@@ -8,8 +8,8 @@
       "status": "included",
       "finding": "publisher publication JPEG. Selected for image-layer display. The 68 by 57 arcminute VST field contains the full bright optical disk. The larger warped neutral-hydrogen outskirts are not represented. This ledger consolidates existing records; no fresh source survey or visual qualification was performed.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33-layers/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33-layers/source/recipe.json"
       ]
     },
     {
@@ -18,8 +18,8 @@
       "status": "included",
       "finding": "The observation is decomposed by local compactness into one high-frequency midplane residual and a diffuse component. Only diffuse optical depth is distributed through 32 normalized parametric slabs; cross-axis textures sample the same separable field. This is not measured per-pixel depth. Adopted thickness: 1.2 kpc. The cited geometry reference is Corbelli et al. 2014, arXiv:1409.2665. Selection does not independently qualify those adopted values.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33-layers/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33-layers/source/recipe.json"
       ]
     },
     {
@@ -27,8 +27,8 @@
       "survey": "scientific-registration",
       "status": "unresolved",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33-layers/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m33-layers/source/recipe.json"
       ]
     }
   ]
diff --git a/src/objects/m33-layers/object.json b/src/objects/m33-layers/object.json
new file mode 100644
index 00000000000..744a4bd50e3
--- /dev/null
+++ b/src/objects/m33-layers/object.json
@@ -0,0 +1,47 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "m33-layers",
+  "type": "image-layer-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        2.0915865224036837e+22,
+        9.077987206651928e+21,
+        1.3516853062999489e+22
+      ],
+      "localToReferenceXyzw": [
+        0.2715432376699965,
+        0.4138728867067246,
+        0.7264844221645582,
+        0.47664860020455996
+      ],
+      "metersPerUnit": 30856775814913670000,
+      "boundsUnits": {
+        "min": [
+          -5.770003871080519,
+          -8.046432846731113,
+          -12.266846328305292
+        ],
+        "max": [
+          5.7412440574190455,
+          8.24693905481557,
+          12.574200076453735
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/recipe.json"
+    },
+    "cataloguePoints": [
+      "stars",
+      "dots"
+    ],
+    "host": "m33"
+  },
+  "prepared": {
+    "format": "cssearth-image-layer-bank@1",
+    "url": "prepared/image-layers.json"
+  }
+}
diff --git a/src/objects/m33/source/ciardullo-pne/points.json b/src/objects/m33-layers/source/ciardullo-pne/points.json
similarity index 100%
rename from src/objects/m33/source/ciardullo-pne/points.json
rename to src/objects/m33-layers/source/ciardullo-pne/points.json
diff --git a/src/objects/m33/source/ciardullo-pne/table2.dat b/src/objects/m33-layers/source/ciardullo-pne/table2.dat
similarity index 100%
rename from src/objects/m33/source/ciardullo-pne/table2.dat
rename to src/objects/m33-layers/source/ciardullo-pne/table2.dat
diff --git a/src/objects/m33/source/disc-geometry.json b/src/objects/m33-layers/source/disc-geometry.json
similarity index 97%
rename from src/objects/m33/source/disc-geometry.json
rename to src/objects/m33-layers/source/disc-geometry.json
index e5602dd9926..8ef0a31ee4b 100644
--- a/src/objects/m33/source/disc-geometry.json
+++ b/src/objects/m33-layers/source/disc-geometry.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-disc-geometry@1",
-  "objectId": "m33",
+  "objectId": "m33-layers",
   "centre": {
     "raDeg": 23.4607,
     "decDeg": 30.6583,
diff --git a/src/objects/m33/source/dots/merge.json b/src/objects/m33-layers/source/dots/merge.json
similarity index 100%
rename from src/objects/m33/source/dots/merge.json
rename to src/objects/m33-layers/source/dots/merge.json
diff --git a/src/objects/m33/source/hodge-hii/points.json b/src/objects/m33-layers/source/hodge-hii/points.json
similarity index 100%
rename from src/objects/m33/source/hodge-hii/points.json
rename to src/objects/m33-layers/source/hodge-hii/points.json
diff --git a/src/objects/m33/source/hodge-hii/table1.dat b/src/objects/m33-layers/source/hodge-hii/table1.dat
similarity index 100%
rename from src/objects/m33/source/hodge-hii/table1.dat
rename to src/objects/m33-layers/source/hodge-hii/table1.dat
diff --git a/src/objects/m33/source/lggs-stars/points.json b/src/objects/m33-layers/source/lggs-stars/points.json
similarity index 100%
rename from src/objects/m33/source/lggs-stars/points.json
rename to src/objects/m33-layers/source/lggs-stars/points.json
diff --git a/src/objects/m33/source/lggs-stars/table5.dat.gz b/src/objects/m33-layers/source/lggs-stars/table5.dat.gz
similarity index 100%
rename from src/objects/m33/source/lggs-stars/table5.dat.gz
rename to src/objects/m33-layers/source/lggs-stars/table5.dat.gz
diff --git a/src/objects/m33/source/lggs-stars/table9.dat b/src/objects/m33-layers/source/lggs-stars/table9.dat
similarity index 100%
rename from src/objects/m33/source/lggs-stars/table9.dat
rename to src/objects/m33-layers/source/lggs-stars/table9.dat
diff --git a/src/objects/m33/source/long-snr/points.json b/src/objects/m33-layers/source/long-snr/points.json
similarity index 100%
rename from src/objects/m33/source/long-snr/points.json
rename to src/objects/m33-layers/source/long-snr/points.json
diff --git a/src/objects/m33/source/long-snr/table3.dat b/src/objects/m33-layers/source/long-snr/table3.dat
similarity index 100%
rename from src/objects/m33/source/long-snr/table3.dat
rename to src/objects/m33-layers/source/long-snr/table3.dat
diff --git a/src/objects/m33-layers/source/manifest.json b/src/objects/m33-layers/source/manifest.json
new file mode 100644
index 00000000000..f05c2377ac7
--- /dev/null
+++ b/src/objects/m33-layers/source/manifest.json
@@ -0,0 +1,328 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "optical",
+      "path": "src/objects/m33-layers/source/source.jpg",
+      "origin": "https://www.eso.org/public/images/eso1424a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1424a/",
+      "title": "VST snaps a very detailed view of the Triangulum Galaxy",
+      "credit": "ESO",
+      "displayCredit": "ESO",
+      "acquisition": "publisher publication JPEG. The hash identifies the local JPEG bytes, not a calibrated native scientific array; acquisition details and provider product ID are retained in source/provenance.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1424a",
+            "role": "material",
+            "evidence": "src/objects/m33-layers/source/provenance.json"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "optical",
+      "license": "CC-BY-4.0; provider terms: https://www.eso.org/public/outreach/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vst",
+            "evidence": "https://www.eso.org/public/images/eso1424a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "ciardullo-pne-table2",
+      "path": "src/objects/m33-layers/source/ciardullo-pne/table2.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/614/167/table2.dat",
+      "title": "The Planetary Nebula System of M33, table2.dat",
+      "credit": "R. Ciardullo, P. R. Durrell, M. B. Laychak, K. A. Herrmann, K. Moody, G. H. Jacoby, J. J. Feldmeier; ApJ 614, 167",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through ciardullo-pne/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "ciardullo-2004-m33-pne",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/614/167/table2.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "hodge-hii-table1",
+      "path": "src/objects/m33-layers/source/hodge-hii/table1.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/PASP/111/685/table1.dat",
+      "title": "The HII Regions of M33. II. A Photometric Catalog of 1272 Newly Identified Emission Regions, table1.dat",
+      "credit": "P. W. Hodge, J. Balsley, T. K. Wyder, B. P. Skelton; PASP 111, 685",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through hodge-hii/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "hodge-1999-m33-hii-regions",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/PASP/111/685/table1.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "lggs-stars-table5",
+      "path": "src/objects/m33-layers/source/lggs-stars/table5.dat.gz",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table5.dat.gz",
+      "title": "A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33, table5.dat.gz",
+      "credit": "P. Massey, K. A. G. Olsen, P. W. Hodge, S. B. Strong, G. H. Jacoby, W. Schlingman, R. C. Smith; AJ 131, 2478",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through lggs-stars/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "massey-2006-lggs-m33-stars",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table5.dat.gz"
+          }
+        ]
+      }
+    },
+    {
+      "id": "long-snr-table3",
+      "path": "src/objects/m33-layers/source/long-snr/table3.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/187/495/table3.dat",
+      "title": "The Chandra ACIS Survey of M33: X-ray, Optical, and Radio Properties of the Supernova Remnants, table3.dat",
+      "credit": "K. S. Long, W. P. Blair, P. F. Winkler, R. H. Becker, T. J. Gaetz, P. Ghavamian, D. J. Helfand, J. P. Hughes, R. P. Kirshner, K. D. Kuntz, E. K. McNeil, T. G. Pannuti, P. P. Plucinsky, D. Saul, R. Tüllmann, B. Williams; ApJS 187, 495",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through long-snr/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "long-2010-m33-snrs",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/187/495/table3.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "pellerin-cepheids-table3",
+      "path": "src/objects/m33-layers/source/pellerin-cepheids/table3.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/193/26/table3.dat",
+      "title": "The M33 Synoptic Stellar Survey. I. Cepheid Variables, table3.dat",
+      "credit": "A. Pellerin, L. M. Macri; ApJS 193, 26",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through pellerin-cepheids/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "pellerin-2011-m33-cepheids",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/193/26/table3.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "sarajedini-clusters-table3",
+      "path": "src/objects/m33-layers/source/sarajedini-clusters/table3.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/134/447/table3.dat",
+      "title": "A Catalog of Star Cluster Candidates in M33, table3.dat",
+      "credit": "A. Sarajedini, C. L. Mancone; AJ 134, 447",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through sarajedini-clusters/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "sarajedini-2007-m33-clusters",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/134/447/table3.dat"
+          }
+        ]
+      }
+    },
+    {
+      "id": "lggs-stars-table9",
+      "path": "src/objects/m33-layers/source/lggs-stars/table9.dat",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table9.dat",
+      "title": "A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33, table9.dat",
+      "credit": "P. Massey, K. A. G. Olsen, P. W. Hodge, S. B. Strong, G. H. Jacoby, W. Schlingman, R. C. Smith; AJ 131, 2478",
+      "acquisition": "Published table downloaded unchanged from its CDS origin: the 361 spectroscopically confirmed members, kept beside the photometry and not drawn.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "massey-2006-lggs-m33-stars",
+            "role": "material",
+            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table9.dat"
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "recipe",
+      "path": "src/objects/m33-layers/source/recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Image-layer preparation recipe",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "provenance",
+      "path": "src/objects/m33-layers/source/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Published image interpretation and acquisition record",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "presentation",
+      "path": "src/objects/m33-layers/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Dataset presentation and prepared-bank bindings",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "stellar-extent",
+      "path": "src/objects/m33-layers/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "mcconnachie-2010-m33-substructure",
+            "role": "reference",
+            "evidence": "https://arxiv.org/abs/1009.2804"
+          }
+        ]
+      }
+    },
+    {
+      "id": "disc-geometry",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/disc-geometry.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored disc orientation that places catalogue dots on the photograph's disc; its values cite their papers inside the file.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "ciardullo-pne-points",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/ciardullo-pne/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the The Planetary Nebula System of M33 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "dots-merge",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/dots/merge.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "hodge-hii-points",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/hodge-hii/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the The HII Regions of M33. II. A Photometric Catalog of 1272 Newly Identified Emission Regions rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "lggs-stars-points",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/lggs-stars/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "long-snr-points",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/long-snr/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the The Chandra ACIS Survey of M33: X-ray, Optical, and Radio Properties of the Supernova Remnants rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "pellerin-cepheids-points",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/pellerin-cepheids/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the The M33 Synoptic Stellar Survey. I. Cepheid Variables rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "sarajedini-clusters-points",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/sarajedini-clusters/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A Catalog of Star Cluster Candidates in M33 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "stars-merge",
+      "kind": "authored-document",
+      "path": "src/objects/m33-layers/source/stars/merge.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/m33/source/pellerin-cepheids/points.json b/src/objects/m33-layers/source/pellerin-cepheids/points.json
similarity index 100%
rename from src/objects/m33/source/pellerin-cepheids/points.json
rename to src/objects/m33-layers/source/pellerin-cepheids/points.json
diff --git a/src/objects/m33/source/pellerin-cepheids/table3.dat b/src/objects/m33-layers/source/pellerin-cepheids/table3.dat
similarity index 100%
rename from src/objects/m33/source/pellerin-cepheids/table3.dat
rename to src/objects/m33-layers/source/pellerin-cepheids/table3.dat
diff --git a/src/objects/m33/source/presentation.json b/src/objects/m33-layers/source/presentation.json
similarity index 86%
rename from src/objects/m33/source/presentation.json
rename to src/objects/m33-layers/source/presentation.json
index f9d7d73fe9b..fba7fc51b38 100644
--- a/src/objects/m33/source/presentation.json
+++ b/src/objects/m33-layers/source/presentation.json
@@ -1,19 +1,19 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m33",
+  "objectId": "m33-layers",
   "name": "Triangulum Galaxy",
   "defaultDataset": "optical",
   "bank": {
-    "path": "src/objects/m33/prepared/image-layers.json"
+    "path": "src/objects/m33-layers/prepared/image-layers.json"
   },
   "recipes": [
     {
       "id": "image-layer-recipe",
-      "path": "src/objects/m33/source/recipe.json"
+      "path": "src/objects/m33-layers/source/recipe.json"
     },
     {
       "id": "source-evidence",
-      "path": "src/objects/m33/source/provenance.json"
+      "path": "src/objects/m33-layers/source/provenance.json"
     }
   ],
   "sharedInputs": [],
@@ -49,7 +49,7 @@
       ],
       "input": "optical",
       "preview": {
-        "path": "src/objects/m33/source/source.jpg",
+        "path": "src/objects/m33-layers/source/source.jpg",
         "url": "https://cdn.eso.org/images/publicationjpg/eso1424a.jpg"
       }
     }
diff --git a/src/objects/m33/source/provenance.json b/src/objects/m33-layers/source/provenance.json
similarity index 100%
rename from src/objects/m33/source/provenance.json
rename to src/objects/m33-layers/source/provenance.json
diff --git a/src/objects/m33/source/recipe.json b/src/objects/m33-layers/source/recipe.json
similarity index 99%
rename from src/objects/m33/source/recipe.json
rename to src/objects/m33-layers/source/recipe.json
index d2e7072a3f0..4d0cb907092 100644
--- a/src/objects/m33/source/recipe.json
+++ b/src/objects/m33-layers/source/recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-image-layer-recipe@1",
-  "id": "m33",
+  "id": "m33-layers",
   "source": {
     "path": "source.jpg",
     "dimensions": [
diff --git a/src/objects/m33/source/sarajedini-clusters/points.json b/src/objects/m33-layers/source/sarajedini-clusters/points.json
similarity index 100%
rename from src/objects/m33/source/sarajedini-clusters/points.json
rename to src/objects/m33-layers/source/sarajedini-clusters/points.json
diff --git a/src/objects/m33/source/sarajedini-clusters/table3.dat b/src/objects/m33-layers/source/sarajedini-clusters/table3.dat
similarity index 100%
rename from src/objects/m33/source/sarajedini-clusters/table3.dat
rename to src/objects/m33-layers/source/sarajedini-clusters/table3.dat
diff --git a/src/objects/m33/source/source.jpg b/src/objects/m33-layers/source/source.jpg
similarity index 100%
rename from src/objects/m33/source/source.jpg
rename to src/objects/m33-layers/source/source.jpg
diff --git a/src/objects/m33/source/stars/merge.json b/src/objects/m33-layers/source/stars/merge.json
similarity index 100%
rename from src/objects/m33/source/stars/merge.json
rename to src/objects/m33-layers/source/stars/merge.json
diff --git a/src/objects/m33/source/stellar-extent.json b/src/objects/m33-layers/source/stellar-extent.json
similarity index 95%
rename from src/objects/m33/source/stellar-extent.json
rename to src/objects/m33-layers/source/stellar-extent.json
index 9a868169e7a..c6e7e73f820 100644
--- a/src/objects/m33/source/stellar-extent.json
+++ b/src/objects/m33-layers/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "m33",
+  "objectId": "m33-layers",
   "radiusPc": 40000,
   "definition": "Projected radius from the M33 centre reached by the low-surface-brightness red-giant substructure around its disc in the Pan-Andromeda Archaeological Survey.",
   "quote": "The structure extends to projected radii of ~40 kpc from the center of M33",
diff --git a/src/objects/m33/README.md b/src/objects/m33/README.md
index 496d98078f7..41f94c129d4 100644
--- a/src/objects/m33/README.md
+++ b/src/objects/m33/README.md
@@ -1,68 +1,16 @@
-# Triangulum Galaxy (M33)
+# Triangulum Galaxy
 
-A publisher optical image supplies the color of a disc whose depth follows a published scale height, with M33's catalogued objects and stars drawn as dots on it. Image brightness does not measure per-pixel distance.
+Triangulum Galaxy as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Triangulum Galaxy image layers](../m33-layers/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Selected source | Input and meaning |
-| --- | --- |
-| [VST snaps a very detailed view of the Triangulum Galaxy](https://www.eso.org/public/images/eso1424a/) | `eso1424a`; 4000 × 3355 pixels; publisher JPEG. |
-| Geometry reference | Corbelli et al. 2014, arXiv:1409.2665. Adopted parameters remain in the [recipe](source/recipe.json); exact source-field qualification is unresolved. |
-| [McConnachie et al. (2010)](https://arxiv.org/abs/1009.2804) | [Stellar extent](source/stellar-extent.json): M33's red-giant substructure reaches projected radii of about 40 kpc. Inside 40 kpc M33's caption hides. It marks where stars are still measured, not a boundary. |
-| [Hodge et al. (1999)](https://doi.org/10.1086/316374) | [HII regions](source/hodge-hii/points.json): 1,272 regions new in 1999, from H-alpha images (CDS J/PASP/111/685). The 1,066 regions of earlier catalogues, the brightest among them, are not in this table. |
-| [Pellerin & Macri (2011)](https://doi.org/10.1088/0067-0049/193/2/26) | [Cepheids](source/pellerin-cepheids/points.json): 563 Cepheids of the M33 Synoptic Stellar Survey main sample (CDS J/ApJS/193/26). |
-| [Long et al. (2010)](https://doi.org/10.1088/0067-0049/187/2/495) | [Supernova remnants](source/long-snr/points.json): 137 remnants and candidates (CDS J/ApJS/187/495). |
-| [Ciardullo et al. (2004)](https://doi.org/10.1086/423414) | [Planetary nebulae](source/ciardullo-pne/points.json): 152 candidates from [O III] imaging (CDS J/ApJ/614/167). Its adopted disc scale height gives the dots and the photograph their depth. |
-| [Sarajedini & Mancone (2007)](https://doi.org/10.1086/518835) | [Star clusters](source/sarajedini-clusters/points.json): the 255 of 451 candidates the authors class as clusters (CDS J/AJ/134/447). |
-| [Massey et al. (2006)](https://doi.org/10.1086/503256) | [Stars](source/lggs-stars/points.json): 146,622 stars of the Local Group Galaxies Survey with UBVRI photometry (CDS J/AJ/131/2478, `table5.dat.gz`). |
-| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | Foreground stars: the 8,330 Gaia DR3 sources within 0.75° of M33's centre that Ren et al.'s criterion marks as Milky Way stars (query in the [Gaia DR3 record](../../sources/gaia-2023-dr3.json)). |
-| [Koch et al. (2018)](https://doi.org/10.1093/mnras/sty1674) | [Disc geometry](source/disc-geometry.json): inclination 55.08° ± 1.56° and position angle 201.12° ± 0.47° from a fit to the whole H I velocity field (Table 2). |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m33.json) cites the position, distance and velocity that place it.
 
-The catalogues give sky positions only, so each object is placed where its sight line crosses the midplane of the disc the image layers are baked on (`frame.placement: image-layer-disc`, [`disc.ts`](../../../packages/bake/src/image-layers/disc.ts)), as M31's are. [`merge-catalogue-points.mts`](../../../packages/bake/cli/merge-catalogue-points.mts) joins them into two banks the app draws over the image layers, the [stars](source/stars/merge.json) under the [dots](source/dots/merge.json):
+## Processing
 
-| Catalogue | Drawn | Left out |
-| --- | --- | --- |
-| HII regions (Hodge et al. 1999) | 1,272 | none |
-| Cepheids (Pellerin & Macri 2011) | 562 | 1 beyond the photograph |
-| Supernova remnants (Long et al. 2010) | 137 | none |
-| Planetary nebulae (Ciardullo et al. 2004) | 150 | 2 beyond the photograph |
-| Star clusters (Sarajedini & Mancone 2007) | 255 | 196 the authors class as stellar, galaxy, unknown or on a chip gap |
-| LGGS stars (Massey et al. 2006) | 4,890 | 4,130 Gaia foreground stars; 706 beyond the photograph; then one in 29 is kept |
-
-Every dot keeps its place in the disc and moves along the disc's axis to a height drawn from an isothermal sheet, sech²(z/z0) with z0 = 175 pc: the scale height Ciardullo et al. (2004, Sect. 6) adopt for M33's planetary nebulae, the only one these sources state (at least ±25%). Young tracers are thinner in disc galaxies, so for HII regions, Cepheids and clusters it is an upper value. Half the dots lie within 100 pc of the midplane, 90% within 253 pc. The spread is published; no dot's own height is measured, and the draw is seeded so a bake repeats it.
-
-Ren et al. (2021, Sect. 3.2) call a star foreground when its Gaia parallax, measured to better than 20%, puts it within 50 kpc, or its proper motion in either coordinate exceeds 0.2 mas/yr (500 km/s at M33) plus 2σ, measured to better than 20%. The same criterion is applied to Gaia DR3 (they used DR2), and an LGGS star within 1 arcsec of a foreground source is left out.
-
-One LGGS star in 29, in catalogue order, keeps 4,890 of 141,786 inside the renderer's 5,000-dot bank and thins every region alike, so the density contrast stays the survey's. The survey is limited by crowding in the centre, so there its density is a floor.
-
-Each star takes its measured B−V (observed, not dereddened) through the app's catalogue star colour; the other catalogues take the Milky Way colour for their kind of object, as M31's do. Each catalogue dot (not the stars) takes its tone from the photograph's brightness under it (never below 15%) and moves halfway from its kind's colour to the photograph's colour there. All are mixed halfway to white and raised to the power 1.6. These are presentation choices. Dots are drawn only inside the image layers' 8.7 kpc support radius, so every dot sits on the photograph.
-
-The dots use the image layers' inclination (54°) and line of nodes (22.5°), so that they sit on the photograph. The published [disc geometry](source/disc-geometry.json) of Koch et al. (2018), from arXiv:1806.11218v2, is 1.1° and 1.4° from the recipe's. One flat plane ignores the warp that Corbelli et al. (2014) find beyond the optical disc.
-
-### The photograph's disc
-
-The photograph's frame reaches only 8.7 kpc into the disc on its tightest side, so the disc ends there and fades from 6.5 kpc (`supportRadiusKpc` 8.7, `supportTaperFraction` 0.75). The 32 diffuse slabs follow the same sech²(z/175 pc) profile as the dots, over ±3 z0 (1.05 kpc). They are baked 80 pixels across, so they hold the photograph's low-frequency light and no knots; the midplane layer keeps the full detail.
-
-The image is publisher-prepared display RGB, not common calibrated flux or a qualified natural-color measurement. Observation dates are not retained in the selected records.
-
-The [manifest](source/manifest.json) records complete credits, reuse terms and canonical source bindings. The [source record](source/provenance.json) identifies the provider product and local conversion. The [investigation ledger](investigations.json) records the selected routes and unresolved qualification.
-
-## Evidence
-
-Measured in the app with dots hidden: tilting from face-on to just before edge-on dims the photograph's total light from 3.4 to about 0.5 (screen luminance above the sky), and the edge-on layers that take over show 0.16. A brighter edge-on bake (up to 5×, still thin) was tried and not adopted.
+1. `pnpm prepare:objects --object=m33` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m33` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- The 68 by 57 arcminute VST field contains the full bright optical disk. The larger warped neutral-hydrogen outskirts are not represented.
-- Foreground stars and background objects remain in the image. Compact features are not classified or individually placed in three dimensions; no point-source removal is applied.
-- The photograph fades as it tilts toward edge-on: its layers cannot brighten with the longer path through the disc, and edge-on it is a faint strip.
-- Exact source fields, uncertainties and coordinate epoch for the image layers' adopted orientation and placement remain incompletely recorded. No independent sky-registration or measured-depth acceptance is available here.
-
-<details>
-<summary>Image-layer preparation and reproduction</summary>
-
-The observation is decomposed by local compactness into one high-frequency midplane residual and a diffuse component. Only diffuse optical depth is distributed through 32 slabs following the published sech² profile above; cross-axis textures sample the same separable field. This is not measured per-pixel depth.
-
-Lossy WebP encoding can differ across platforms, so a new replay must compare its output against the published bank and report differences. The [shared bake guide](../../../labs/nebula/docs/baking.md) describes reproduction.
-
-</details>
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m33/inventory.json b/src/objects/m33/inventory.json
index 6a76569fcab..f5342baf30f 100644
--- a/src/objects/m33/inventory.json
+++ b/src/objects/m33/inventory.json
@@ -3,549 +3,51 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/optical.webp",
+      "filename": "m33-dataset-optical.webp",
       "bytes": 15530,
       "sha256": "aa6d1e2ca762edd6454bc1d73f51ec597216f687b3cafe2c92d30f78bb874ad8"
     },
     {
       "location": "prepared",
-      "filename": "dots.bin",
-      "bytes": 23952,
-      "sha256": "730a628907e2ff5b11c9cb20bc1185648c44c4fe009e9ae4d3ade9323b0a8148"
+      "filename": "content.json",
+      "bytes": 1951,
+      "sha256": "8794065a601f47ffa0516575d893b9dcfccf7943ca59e4dbedf4889609c31da5"
     },
     {
       "location": "prepared",
-      "filename": "image-layers.json",
-      "bytes": 150295,
-      "sha256": "59d73cae9da57a167b4083d6f70a6c80710d360e871fede4c9dab38ae60d2427"
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-      "sha256": "95a5c002d7441a2e07a3353703fb2a97f3524fb1b25d89e6c71fa2ad72fc51c6"
-    },
-    {
-      "location": "prepared",
-      "filename": "layers/z-30.webp",
-      "bytes": 186,
-      "sha256": "95a5c002d7441a2e07a3353703fb2a97f3524fb1b25d89e6c71fa2ad72fc51c6"
-    },
-    {
-      "location": "prepared",
-      "filename": "layers/z-31.webp",
-      "bytes": 186,
-      "sha256": "95a5c002d7441a2e07a3353703fb2a97f3524fb1b25d89e6c71fa2ad72fc51c6"
-    },
-    {
-      "location": "prepared",
-      "filename": "layers/z-detail.webp",
-      "bytes": 2256212,
-      "sha256": "a6048b7d124546ccb02e3ee10c39699f2972f75412ff134459628ad7102a8c9e"
-    },
-    {
-      "location": "prepared",
-      "filename": "presentation.json",
-      "bytes": 1688,
-      "sha256": "cf727f858a2e5f3575029e1c8144c6e10758cd787fd04b49009f2713c8514dc2"
-    },
-    {
-      "location": "prepared",
-      "filename": "stars.bin",
-      "bytes": 43443,
-      "sha256": "cd6a11c3222022b8ad3f3c974ec315eb469630113c3cc0b43acc85eed14500fb"
+      "filename": "world-navigation.json",
+      "bytes": 638,
+      "sha256": "7f5fdfc9d266ef8b188645819aeeadc8fc169d9f8dce99530eb5a5f960a477fc"
     }
   ]
 }
diff --git a/src/objects/m33/object.json b/src/objects/m33/object.json
index ac1fc0fa021..e0f3f104ee8 100644
--- a/src/objects/m33/object.json
+++ b/src/objects/m33/object.json
@@ -1,46 +1,97 @@
 {
   "schema": "cssearth-object@2",
   "id": "m33",
-  "type": "image-layer-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Triangulum Galaxy",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 277710982334223070
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "M 33",
+      "systemName": "Local Group",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 177184257600,
+      "description": "A galaxy 859,014 parsecs away.",
+      "aliases": [
+        "Triangulum",
+        "NGC 598",
+        "UGC 1117"
+      ],
+      "order": 5142,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
-        2.0915865224036837e+22,
-        9.077987206651928e+21,
-        1.3516853062999489e+22
+        2.091586510501188e+22,
+        9.077987154992236e+21,
+        1.3516852986079747e+22
       ],
-      "localToReferenceXyzw": [
-        0.2715432376699965,
-        0.4138728867067246,
-        0.7264844221645582,
-        0.47664860020455996
+      "presentationToReference": [
+        0.8364228535488972,
+        0,
+        0.5480846741709895,
+        0.5028578570469151,
+        0.3977771559319137,
+        -0.7674029644358314,
+        0.21801556290160587,
+        -0.9174820620691818,
+        -0.3327099038411359
       ],
-      "metersPerUnit": 30856775814913670000,
-      "boundsUnits": {
-        "min": [
-          -5.770003871080519,
-          -8.046432846731113,
-          -12.266846328305292
-        ],
-        "max": [
-          5.7412440574190455,
-          8.24693905481557,
-          12.574200076453735
-        ]
-      }
-    },
-    "preparation": {
-      "source": "source/recipe.json"
-    },
-    "cataloguePoints": [
-      "stars",
-      "dots"
-    ]
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 895841878497493800,
+      "bodyRadiusM": 277710982334223060000
+    }
   },
   "prepared": {
-    "format": "cssearth-image-layer-bank@1",
-    "url": "prepared/image-layers.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m33/source/content/object.json b/src/objects/m33/source/content/object.json
new file mode 100644
index 00000000000..dbadd3ce3ef
--- /dev/null
+++ b/src/objects/m33/source/content/object.json
@@ -0,0 +1,91 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m33",
+  "displayName": "M 33",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "859 kpc (\u221223,410 / +24,070 pc)",
+        "source": {
+          "catalogueId": "publication-savino2022apj-938-101s",
+          "url": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S",
+          "label": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 23.46\u00b0, Dec 30.66\u00b0",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "membership",
+        "label": "Membership",
+        "value": "Local group, Andromeda",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "optical",
+    "controls": [
+      {
+        "id": "optical",
+        "label": "ESO \u00b7 optical",
+        "thumbnail": "m33-dataset-optical.webp",
+        "volume": {
+          "objectId": "m33-layers",
+          "datasetId": "optical",
+          "surface": "optical"
+        },
+        "source": {
+          "id": "m33-layers-optical",
+          "path": "../../m33-layers/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1424a/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure",
+      "href": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+      "href": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S",
+      "credit": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure"
+    }
+  }
+}
diff --git a/src/objects/m33/source/manifest.json b/src/objects/m33/source/manifest.json
index a13d1c2660b..197a7bed088 100644
--- a/src/objects/m33/source/manifest.json
+++ b/src/objects/m33/source/manifest.json
@@ -1,328 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "optical",
-      "path": "src/objects/m33/source/source.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/eso1424a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1424a/",
-      "title": "VST snaps a very detailed view of the Triangulum Galaxy",
-      "credit": "ESO",
-      "displayCredit": "ESO",
-      "acquisition": "publisher publication JPEG. The hash identifies the local JPEG bytes, not a calibrated native scientific array; acquisition details and provider product ID are retained in source/provenance.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso1424a",
-            "role": "material",
-            "evidence": "src/objects/m33/source/provenance.json"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "optical",
+      "credit": "ESO; the default dataset's picture as the Triangulum Galaxy bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0; provider terms: https://www.eso.org/public/outreach/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "vst",
-            "evidence": "https://www.eso.org/public/images/eso1424a/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "ciardullo-pne-table2",
-      "path": "src/objects/m33/source/ciardullo-pne/table2.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/614/167/table2.dat",
-      "title": "The Planetary Nebula System of M33, table2.dat",
-      "credit": "R. Ciardullo, P. R. Durrell, M. B. Laychak, K. A. Herrmann, K. Moody, G. H. Jacoby, J. J. Feldmeier; ApJ 614, 167",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through ciardullo-pne/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "ciardullo-2004-m33-pne",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/614/167/table2.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "hodge-hii-table1",
-      "path": "src/objects/m33/source/hodge-hii/table1.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/PASP/111/685/table1.dat",
-      "title": "The HII Regions of M33. II. A Photometric Catalog of 1272 Newly Identified Emission Regions, table1.dat",
-      "credit": "P. W. Hodge, J. Balsley, T. K. Wyder, B. P. Skelton; PASP 111, 685",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through hodge-hii/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "hodge-1999-m33-hii-regions",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/PASP/111/685/table1.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "lggs-stars-table5",
-      "path": "src/objects/m33/source/lggs-stars/table5.dat.gz",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table5.dat.gz",
-      "title": "A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33, table5.dat.gz",
-      "credit": "P. Massey, K. A. G. Olsen, P. W. Hodge, S. B. Strong, G. H. Jacoby, W. Schlingman, R. C. Smith; AJ 131, 2478",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through lggs-stars/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "massey-2006-lggs-m33-stars",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table5.dat.gz"
-          }
-        ]
-      }
-    },
-    {
-      "id": "long-snr-table3",
-      "path": "src/objects/m33/source/long-snr/table3.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/187/495/table3.dat",
-      "title": "The Chandra ACIS Survey of M33: X-ray, Optical, and Radio Properties of the Supernova Remnants, table3.dat",
-      "credit": "K. S. Long, W. P. Blair, P. F. Winkler, R. H. Becker, T. J. Gaetz, P. Ghavamian, D. J. Helfand, J. P. Hughes, R. P. Kirshner, K. D. Kuntz, E. K. McNeil, T. G. Pannuti, P. P. Plucinsky, D. Saul, R. Tüllmann, B. Williams; ApJS 187, 495",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through long-snr/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "long-2010-m33-snrs",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/187/495/table3.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "pellerin-cepheids-table3",
-      "path": "src/objects/m33/source/pellerin-cepheids/table3.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/193/26/table3.dat",
-      "title": "The M33 Synoptic Stellar Survey. I. Cepheid Variables, table3.dat",
-      "credit": "A. Pellerin, L. M. Macri; ApJS 193, 26",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through pellerin-cepheids/points.json.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "pellerin-2011-m33-cepheids",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/193/26/table3.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "sarajedini-clusters-table3",
-      "path": "src/objects/m33/source/sarajedini-clusters/table3.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/134/447/table3.dat",
-      "title": "A Catalog of Star Cluster Candidates in M33, table3.dat",
-      "credit": "A. Sarajedini, C. L. Mancone; AJ 134, 447",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through sarajedini-clusters/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "sarajedini-2007-m33-clusters",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/134/447/table3.dat"
-          }
-        ]
-      }
-    },
-    {
-      "id": "lggs-stars-table9",
-      "path": "src/objects/m33/source/lggs-stars/table9.dat",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table9.dat",
-      "title": "A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33, table9.dat",
-      "credit": "P. Massey, K. A. G. Olsen, P. W. Hodge, S. B. Strong, G. H. Jacoby, W. Schlingman, R. C. Smith; AJ 131, 2478",
-      "acquisition": "Published table downloaded unchanged from its CDS origin: the 361 spectroscopically confirmed members, kept beside the photometry and not drawn.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "massey-2006-lggs-m33-stars",
-            "role": "material",
-            "evidence": "https://cdsarc.cds.unistra.fr/ftp/J/AJ/131/2478/table9.dat"
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m33-layers/source/manifest.json)."
       }
     }
   ],
   "documents": [
     {
-      "id": "recipe",
-      "path": "src/objects/m33/source/recipe.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Image-layer preparation recipe",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "provenance",
-      "path": "src/objects/m33/source/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Published image interpretation and acquisition record",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "presentation",
-      "path": "src/objects/m33/source/presentation.json",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Dataset presentation and prepared-bank bindings",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "stellar-extent",
-      "path": "src/objects/m33/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "mcconnachie-2010-m33-substructure",
-            "role": "reference",
-            "evidence": "https://arxiv.org/abs/1009.2804"
-          }
-        ]
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "disc-geometry",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/disc-geometry.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored disc orientation that places catalogue dots on the photograph's disc; its values cite their papers inside the file.",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "ciardullo-pne-points",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/ciardullo-pne/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the The Planetary Nebula System of M33 rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "dots-merge",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/dots/merge.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "hodge-hii-points",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/hodge-hii/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the The HII Regions of M33. II. A Photometric Catalog of 1272 Newly Identified Emission Regions rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "lggs-stars-points",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/lggs-stars/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A Survey of Local Group Galaxies Currently Forming Stars. I. UBVRI Photometry of Stars in M31 and M33 rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "long-snr-points",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/long-snr/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the The Chandra ACIS Survey of M33: X-ray, Optical, and Radio Properties of the Supernova Remnants rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "pellerin-cepheids-points",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/pellerin-cepheids/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the The M33 Synoptic Stellar Survey. I. Cepheid Variables rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "sarajedini-clusters-points",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/sarajedini-clusters/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A Catalog of Star Cluster Candidates in M33 rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "stars-merge",
-      "kind": "authored-document",
-      "path": "src/objects/m33/source/stars/merge.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/m33/source/preparation/navigation.json b/src/objects/m33/source/preparation/navigation.json
new file mode 100644
index 00000000000..5335a88d720
--- /dev/null
+++ b/src/objects/m33/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m33",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m33/source/presentation/context.png b/src/objects/m33/source/presentation/context.png
new file mode 100644
index 00000000000..19a54a0a6cf
Binary files /dev/null and b/src/objects/m33/source/presentation/context.png differ
diff --git a/src/objects/m33/source/presentation/solar-system.json b/src/objects/m33/source/presentation/solar-system.json
new file mode 100644
index 00000000000..b9e063b1a50
--- /dev/null
+++ b/src/objects/m33/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m33",
+  "displayName": "Triangulum Galaxy",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 2.7771098233422307e+17,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m33/text.json b/src/objects/m33/text.json
new file mode 100644
index 00000000000..1d93a4b4177
--- /dev/null
+++ b/src/objects/m33/text.json
@@ -0,0 +1,44 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m33",
+  "card": {
+    "text": "A galaxy 859,014 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-savino2022apj-938-101s",
+        "url": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S",
+        "label": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure",
+        "checked": "2026-10-01",
+        "locator": "distance: 859 kpc (−23,410 / +24,070 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 859,014 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-savino2022apj-938-101s",
+        "url": "https://ui.adsabs.harvard.edu/abs/2022ApJ...938..101S",
+        "label": "Savino2022ApJ...938..101S: The Hubble Space Telescope Survey of M31 Satellite Galaxies. I. RR Lyrae-based Distances and Refined 3D Geometric Structure",
+        "checked": "2026-10-01",
+        "locator": "distance: 859 kpc (−23,410 / +24,070 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "optical": {
+      "title": "VST view of the Triangulum Galaxy",
+      "detail": "4000 × 3355 px",
+      "summary": "Visible-light image on an approximate depth model; individual depths are not measured.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1424a",
+          "url": "https://www.eso.org/public/images/eso1424a/",
+          "label": "VST snaps a very detailed view of the Triangulum Galaxy; ESO",
+          "checked": "2026-10-01",
+          "locator": "VST snaps a very detailed view of the Triangulum Galaxy"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m42-volume/README.md b/src/objects/m42-volume/README.md
new file mode 100644
index 00000000000..6c3d75e07f1
--- /dev/null
+++ b/src/objects/m42-volume/README.md
@@ -0,0 +1,42 @@
+# Orion Nebula (M42)
+
+Two ESO datasets color a coherent, authored ionization-front hypothesis; **optical is the default**. Local literature constraints do not measure the depth of the entire wide field.
+
+## Sources
+
+| Source / dataset | Selected image and coverage |
+| --- | --- |
+| [ESO optical, eso1723a](https://www.eso.org/public/images/eso1723a/) | i/Hα/r/G display; 4000 × 3106 pixels, 59.95′ × 46.56′. |
+| [ESO VISTA, eso1006a](https://www.eso.org/public/images/eso1006a/) | K/J/Z near-IR display; 3252 × 4000 pixels, 71.84′ × 88.35′. |
+| [Local physical evidence](source/bake-inputs/references/05-physical-evidence.json) | Wen–O’Dell, Henney and later Orion interpretations guide central topology; wide-field curvature and thickness are authored. |
+
+Both publisher TIFFs retain their full footprints. Their RGB values are stretched display samples, not common flux units; resolution and coverage differ. The adopted distance is **414 ± 7 pc**, from [Menten et al. (2007), abstract](https://arxiv.org/abs/0709.0485).
+
+The [stellar field](source/stellar-field.json) contains 2780 Gaia candidates in an authored 50 pc sphere, G < 14; 1500 brightness-ranked points are delivered with a spherical fade. Positions use Bailer-Jones distance estimates, with uncertainty intervals retained. Image bounds do not determine stellar depth or selection.
+
+Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
+
+## Evidence
+
+- The [object descriptor](object.json) pins the installed bank; [delivery inputs](source/delivery.json) record saved controls and catalogue preparation. The source manifest distinguishes those inputs from generated delivery bytes.
+- The [fixed lab processing account](../../../labs/nebula/models/m42/README.md) records both-dataset browser checks, native stellar-light accounting and coherent-front projection comparisons. Its older result identities are historical, not a fresh acceptance of the current delivery.
+- This documentation review checks provenance and interpretation; it does not establish a cold replay, independent gas-depth validation or material acceptance.
+
+## Known problems
+
+- A rectangular optical coverage transition, pale neutral residuals and fine oblique slice bands remain. Adding surrounding stars does not repair the cloud’s photographic boundary.
+- The roughly 0.2 pc star/front distance and 0.1 pc equivalent layer are local published models at the papers’ distance, not whole-field measurements.
+- Orion-S, foreground Veil alternatives, extinction and overlapping fronts remain incomplete. Downloaded central MUSE diagnostic maps have not been fitted; several lack required masks, units or complete WCS.
+
+<details>
+<summary>Methods and historical comparisons</summary>
+
+The [physical ledger](../../../labs/nebula/models/m42/physical-evidence.json) separates observed positions, published models and authored parameters; [depth-model.json](../../../labs/nebula/models/m42/depth-model.json) is the runnable hypothesis. The [fixed lab README](../../../labs/nebula/models/m42/README.md) preserves the earlier 355-support and saved-100%-detail comparisons, including their normalized-image error limits. General preparation is documented in the [nebula guide](../../../docs/nebulae/README.md).
+
+</details>
+
+## Compact delivery inputs
+
+The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
+
+Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
diff --git a/src/objects/m42-volume/inventory.json b/src/objects/m42-volume/inventory.json
new file mode 100644
index 00000000000..9326a4f10cd
--- /dev/null
+++ b/src/objects/m42-volume/inventory.json
@@ -0,0 +1,389 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/eso-optical.webp",
+      "bytes": 10124,
+      "sha256": "c38dfe26cf81b31463ebd80e39b58952ac3d759882fef6b06bcc77b8868d2626"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/eso-vista.webp",
+      "bytes": 16000,
+      "sha256": "775d2bc1decb89e944da6992f210dd7ab758222de394d2f9a07f2ce088338bfe"
+    },
+    {
+      "location": "prepared",
+      "filename": "datasets.json",
+      "bytes": 1546913,
+      "sha256": "645d22d96717b37459645187bf5872ccec97f9965dd9a98db4030d5a52e6c25f"
+    },
+    {
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+      "filename": "delivery.json",
+      "bytes": 3940,
+      "sha256": "1b69611434ef3cf0b00033d576118d40765e51f4e6ba253638acaa053fca360c"
+    },
+    {
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+      "filename": "eso-optical/atlases/x.webp",
+      "bytes": 355254,
+      "sha256": "ec7c830e0ebaad7033766c22a7ba069542f6539a481dd8b000fad978e0b9fbd4"
+    },
+    {
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+      "filename": "eso-optical/atlases/y.webp",
+      "bytes": 576088,
+      "sha256": "4da5e7a104c045741a7255a32def82e9d3792a9aef575dd87e7c6df5984e3111"
+    },
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+      "location": "prepared",
+      "filename": "eso-optical/atlases/z.webp",
+      "bytes": 411156,
+      "sha256": "04ef1c52b469b0e191e5a819ff6e98f29a8529bf501345d05e4f90853d006953"
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+    },
+    {
+      "location": "prepared",
+      "filename": "presentation.json",
+      "bytes": 3269,
+      "sha256": "d2804111e0815171cd7d0db74a85c96c1ae16c052b6c807b8ffa9d684e5027b6"
+    },
+    {
+      "location": "prepared",
+      "filename": "provenance.json",
+      "bytes": 33247,
+      "sha256": "7811181cc70f2b75d949ee2e353f9113b15dd1e4ca0a31878be6237f34d6f3f8"
+    }
+  ]
+}
diff --git a/src/objects/m42/investigations.json b/src/objects/m42-volume/investigations.json
similarity index 95%
rename from src/objects/m42/investigations.json
rename to src/objects/m42-volume/investigations.json
index b38c3fe3d5e..abc763489f4 100644
--- a/src/objects/m42/investigations.json
+++ b/src/objects/m42-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "m42",
+  "objectId": "m42-volume",
   "entries": [
     {
       "id": "dataset-eso-optical",
@@ -8,7 +8,7 @@
       "status": "included",
       "finding": "Default i/H-alpha/r/G display, 4000 by 3106 pixels over 59.95 by 46.56 arcmin. It colors the conditional coherent front; image intensity does not measure gas depth. The rectangular optical coverage transition remains unresolved.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m42/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m42/observations.json"
       ]
@@ -19,7 +19,7 @@
       "status": "included",
       "finding": "K/J/Z near-IR display, 3252 by 4000 pixels over 71.84 by 88.35 arcmin, on the same cloud geometry as optical. Different coverage and display color do not imply a second view or calibrated common emission.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m42/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m42/observations.json"
       ]
@@ -30,8 +30,8 @@
       "status": "included",
       "finding": "2780 Gaia candidates in an authored 50 pc sphere, G < 14; the delivered budget selects 1500 by brightness with spherical and faint-edge fades. Actual catalogue source IDs, median distances and uncertainty intervals are retained. Sphere, quality cuts, budget, brightness response and fade are display selections, not a membership survey; Cardiel BP-RP display color uses a neutral fallback outside its valid range.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42/source/stellar-field.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42/source/delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42-volume/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42-volume/source/delivery.json",
         "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
         "https://arxiv.org/abs/2012.05220",
         "https://arxiv.org/abs/2107.08734"
@@ -43,7 +43,7 @@
       "status": "included",
       "finding": "The adopted 414 ± 7 pc scale places the common frame; it is not a per-pixel cloud-distance measurement.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42/source/nebula.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42-volume/source/nebula.json",
         "https://arxiv.org/abs/0709.0485"
       ]
     },
@@ -91,7 +91,7 @@
       "finding": "The lab’s 650 reference-image points and measured aperture-light correction are historical processing evidence. The app replaces this rectangular, depth-conditioned field with Gaia distances; unchanged image counting is not a stellar membership test.",
       "evidence": [
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m42/README.md",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42/source/stellar-field.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m42-volume/source/stellar-field.json"
       ],
       "revisitWhen": "Retain any future compact anchor only with positive image/source evidence and an explicit conditional-depth exception, never by restoring the whole photographic rectangle."
     },
diff --git a/src/objects/m42-volume/object.json b/src/objects/m42-volume/object.json
new file mode 100644
index 00000000000..e2d870db70f
--- /dev/null
+++ b/src/objects/m42-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "m42-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        1388299297133001700,
+        12644723166596753000,
+        -1200350938996617000
+      ],
+      "localToReferenceXyzw": [
+        0.04008130032303666,
+        0.7385465250038857,
+        0.6720211238117233,
+        0.03647093253438646
+      ],
+      "metersPerUnit": 61933518469800,
+      "boundsUnits": {
+        "min": [
+          -2882.2208182738705,
+          -3792.864635137777,
+          -1185.3991963186154
+        ],
+        "max": [
+          2882.2208182738705,
+          3792.864635137777,
+          1185.3991963186154
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/delivery.json"
+    },
+    "host": "m42"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/m42/source/bake-inputs.json.gz b/src/objects/m42-volume/source/bake-inputs.json.gz
similarity index 100%
rename from src/objects/m42/source/bake-inputs.json.gz
rename to src/objects/m42-volume/source/bake-inputs.json.gz
diff --git a/src/objects/m42/source/bake-inputs/references/01-compiler.json b/src/objects/m42-volume/source/bake-inputs/references/01-compiler.json
similarity index 95%
rename from src/objects/m42/source/bake-inputs/references/01-compiler.json
rename to src/objects/m42-volume/source/bake-inputs/references/01-compiler.json
index 9fc37c6399c..e371b1d41cc 100644
--- a/src/objects/m42/source/bake-inputs/references/01-compiler.json
+++ b/src/objects/m42-volume/source/bake-inputs/references/01-compiler.json
@@ -1,7 +1,7 @@
 {
   "schema": "cssearth-nebula-compiler@1",
-  "id": "m42",
-  "label": "Orion \u00b7 M42",
+  "id": "m42-volume",
+  "label": "Orion · M42",
   "observationRecipe": "labs/nebula/models/m42/observations.json",
   "observationCatalogue": ".local/nebula-lab/observations/m42/observations.json",
   "structureRecipe": "labs/nebula/models/m42/observation-structures.json",
diff --git a/src/objects/m42/source/bake-inputs/references/02-observations.json b/src/objects/m42-volume/source/bake-inputs/references/02-observations.json
similarity index 94%
rename from src/objects/m42/source/bake-inputs/references/02-observations.json
rename to src/objects/m42-volume/source/bake-inputs/references/02-observations.json
index ef89fee1833..47e78a9b55e 100644
--- a/src/objects/m42/source/bake-inputs/references/02-observations.json
+++ b/src/objects/m42-volume/source/bake-inputs/references/02-observations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-observation-recipe@1",
-  "id": "m42",
+  "id": "m42-volume",
   "referenceId": "eso-optical",
   "frame": {
     "width": 1024,
@@ -18,7 +18,7 @@
   "images": [
     {
       "id": "eso-optical",
-      "label": "ESO \u00b7 optical",
+      "label": "ESO · optical",
       "url": "https://cdn.eso.org/images/publicationtiff/eso1723a.tif",
       "page": "https://www.eso.org/public/images/eso1723a/",
       "width": 4000,
@@ -32,7 +32,7 @@
         -5.47870026672
       ],
       "northRightDegrees": -0.17999999999999988,
-      "bands": "Optical \u00b7 i / H-alpha / r / G",
+      "bands": "Optical · i / H-alpha / r / G",
       "credit": "ESO/G. Beccari",
       "termsUrl": "https://www.eso.org/public/outreach/copyright/",
       "wcs": {
@@ -66,7 +66,7 @@
     },
     {
       "id": "eso-vista",
-      "label": "ESO VISTA \u00b7 infrared",
+      "label": "ESO VISTA · infrared",
       "url": "https://cdn.eso.org/images/publicationtiff/eso1006a.tif",
       "page": "https://www.eso.org/public/images/eso1006a/",
       "width": 3252,
@@ -80,7 +80,7 @@
         -5.390986
       ],
       "northRightDegrees": -0.07133976132,
-      "bands": "Near-infrared \u00b7 K / J / Z",
+      "bands": "Near-infrared · K / J / Z",
       "credit": "ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit",
       "termsUrl": "https://www.eso.org/public/outreach/copyright/",
       "wcs": {
diff --git a/src/objects/m42/source/bake-inputs/references/03-observation-structures.json b/src/objects/m42-volume/source/bake-inputs/references/03-observation-structures.json
similarity index 100%
rename from src/objects/m42/source/bake-inputs/references/03-observation-structures.json
rename to src/objects/m42-volume/source/bake-inputs/references/03-observation-structures.json
diff --git a/src/objects/m42/source/bake-inputs/references/04-depth-model.json b/src/objects/m42-volume/source/bake-inputs/references/04-depth-model.json
similarity index 99%
rename from src/objects/m42/source/bake-inputs/references/04-depth-model.json
rename to src/objects/m42-volume/source/bake-inputs/references/04-depth-model.json
index b612846d1dd..7c3cbaae135 100644
--- a/src/objects/m42/source/bake-inputs/references/04-depth-model.json
+++ b/src/objects/m42-volume/source/bake-inputs/references/04-depth-model.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-depth-model@1",
-  "id": "m42",
+  "id": "m42-volume",
   "centerIcrsDegrees": [
     83.78715182853901,
     -5.400382551151912
diff --git a/src/objects/m42/source/bake-inputs/references/05-physical-evidence.json b/src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json
similarity index 100%
rename from src/objects/m42/source/bake-inputs/references/05-physical-evidence.json
rename to src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json
diff --git a/src/objects/m42/source/delivery.json b/src/objects/m42-volume/source/delivery.json
similarity index 85%
rename from src/objects/m42/source/delivery.json
rename to src/objects/m42-volume/source/delivery.json
index bdee8da739e..f0e5e642ca0 100644
--- a/src/objects/m42/source/delivery.json
+++ b/src/objects/m42-volume/source/delivery.json
@@ -1,9 +1,9 @@
 {
   "schema": "cssearth-nebula-delivery@2",
-  "id": "m42",
+  "id": "m42-volume",
   "method": "compiler",
   "request": {
-    "path": "src/objects/m42/source/request.json"
+    "path": "src/objects/m42-volume/source/request.json"
   },
   "inputPins": [
     {
@@ -37,10 +37,10 @@
   "framingRadiusUnits": 2400,
   "acceptedLabResult": "m42-compiler",
   "fieldStars": {
-    "path": "src/objects/m42/source/stellar-field.json"
+    "path": "src/objects/m42-volume/source/stellar-field.json"
   },
   "compactInputs": {
-    "path": "src/objects/m42/source/bake-inputs.json.gz"
+    "path": "src/objects/m42-volume/source/bake-inputs.json.gz"
   },
   "compactMethod": "compiler"
 }
diff --git a/src/objects/m42-volume/source/manifest.json b/src/objects/m42-volume/source/manifest.json
new file mode 100644
index 00000000000..38992a2a27b
--- /dev/null
+++ b/src/objects/m42-volume/source/manifest.json
@@ -0,0 +1,258 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "eso-optical",
+      "path": ".local/nebula-lab/observations/m42/sources/eso-optical.tif",
+      "origin": "https://www.eso.org/public/images/eso1723a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1723a/",
+      "title": "Orion · eso1723a",
+      "credit": "ESO/G. Beccari",
+      "displayCredit": "ESO/G. Beccari",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1723a",
+            "role": "material",
+            "evidence": "labs/nebula/models/m42/observations.json#/images/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso-optical",
+      "license": "ESO public-image terms; retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vst",
+            "evidence": "https://www.eso.org/public/images/eso1723a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "eso-vista",
+      "path": ".local/nebula-lab/observations/m42/sources/eso-vista.tif",
+      "origin": "https://www.eso.org/public/images/eso1006a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1006a/",
+      "title": "Orion · eso1006a",
+      "credit": "ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit",
+      "displayCredit": "ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1006a",
+            "role": "material",
+            "evidence": "labs/nebula/models/m42/observations.json#/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso-vista",
+      "license": "ESO public-image terms; retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vista",
+            "evidence": "https://www.eso.org/public/images/eso1006a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "physical-evidence",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json",
+      "origin": "https://doi.org/10.1086/175123",
+      "sourceUrl": "https://doi.org/10.1086/175123",
+      "title": "Orion physical-evidence ledger",
+      "credit": "Published Orion structure studies; authored extrapolation",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "wen-odell-1995",
+            "role": "method",
+            "evidence": "src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json: /sources/1"
+          },
+          {
+            "catalogueId": "henney-2005",
+            "role": "method",
+            "evidence": "src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json: /sources/2"
+          },
+          {
+            "catalogueId": "odell-2009",
+            "role": "method",
+            "evidence": "src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json: /sources/3"
+          },
+          {
+            "catalogueId": "odell-abel-2025",
+            "role": "method",
+            "evidence": "src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json: /sources/4"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "distance",
+      "path": "src/objects/m42-volume/source/delivery.json",
+      "origin": "https://arxiv.org/abs/0709.0485",
+      "sourceUrl": "https://arxiv.org/abs/0709.0485",
+      "title": "Orion adopted world placement",
+      "credit": "Menten et al. (2007); cssEarth placement",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "menten-2007",
+            "role": "reference",
+            "evidence": "src/objects/m42-volume/source/delivery.json: sky.distancePc = 414; adopted world placement"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "stellar-field",
+      "path": "src/objects/m42-volume/source/stellar-field.json",
+      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "title": "Orion Nebula surrounding Gaia DR3 stellar field",
+      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
+      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
+      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "gaia-dr3-gavo",
+            "role": "material",
+            "evidence": "src/objects/m42-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "bailer-jones-2021-distances",
+            "role": "method",
+            "evidence": "src/objects/m42-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "cardiel-2021-rgb",
+            "role": "method",
+            "evidence": "src/objects/m42-volume/source/stellar-field.json#/provenance"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "gaia",
+            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-1",
+      "path": "src/objects/m42-volume/source/delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/m42-volume/source/nebula.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-3",
+      "path": "src/objects/m42-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/m42-volume/source/request.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "retained-evidence-5",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/01-compiler.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-6",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/02-observations.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-7",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/03-observation-structures.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-8",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/04-depth-model.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-9",
+      "path": "src/objects/m42-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-10",
+      "path": "src/objects/m42-volume/source/replay-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
+      }
+    }
+  ],
+  "generatedIntermediates": [
+    {
+      "id": "compact-bake-inputs-json-gz",
+      "path": "src/objects/m42-volume/source/bake-inputs.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    }
+  ]
+}
diff --git a/src/objects/m42/source/nebula.json b/src/objects/m42-volume/source/nebula.json
similarity index 98%
rename from src/objects/m42/source/nebula.json
rename to src/objects/m42-volume/source/nebula.json
index d79fee2907e..1b91512d45b 100644
--- a/src/objects/m42/source/nebula.json
+++ b/src/objects/m42-volume/source/nebula.json
@@ -57,7 +57,7 @@
         "sourceRef": "m42-registered-images"
       },
       "status": "confirmed",
-      "detailedObjectId": "m42"
+      "detailedObjectId": "m42-volume"
     }
   ]
 }
diff --git a/src/objects/m42/source/presentation.json b/src/objects/m42-volume/source/presentation.json
similarity index 83%
rename from src/objects/m42/source/presentation.json
rename to src/objects/m42-volume/source/presentation.json
index a9a553110fe..4698e48123d 100644
--- a/src/objects/m42/source/presentation.json
+++ b/src/objects/m42-volume/source/presentation.json
@@ -1,39 +1,39 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m42",
+  "objectId": "m42-volume",
   "name": "Orion Nebula",
   "defaultDataset": "eso-optical",
   "bank": {
-    "path": "src/objects/m42/prepared/datasets.json"
+    "path": "src/objects/m42-volume/prepared/datasets.json"
   },
   "recipes": [
     {
       "id": "recipe-1",
-      "path": "src/objects/m42/source/delivery.json"
+      "path": "src/objects/m42-volume/source/delivery.json"
     },
     {
       "id": "recipe-2",
-      "path": "src/objects/m42/source/request.json"
+      "path": "src/objects/m42-volume/source/request.json"
     },
     {
       "id": "recipe-3",
-      "path": "src/objects/m42/source/bake-inputs/references/01-compiler.json"
+      "path": "src/objects/m42-volume/source/bake-inputs/references/01-compiler.json"
     },
     {
       "id": "recipe-4",
-      "path": "src/objects/m42/source/bake-inputs/references/02-observations.json"
+      "path": "src/objects/m42-volume/source/bake-inputs/references/02-observations.json"
     },
     {
       "id": "recipe-5",
-      "path": "src/objects/m42/source/bake-inputs/references/03-observation-structures.json"
+      "path": "src/objects/m42-volume/source/bake-inputs/references/03-observation-structures.json"
     },
     {
       "id": "recipe-6",
-      "path": "src/objects/m42/source/bake-inputs/references/04-depth-model.json"
+      "path": "src/objects/m42-volume/source/bake-inputs/references/04-depth-model.json"
     },
     {
       "id": "recipe-7",
-      "path": "src/objects/m42/source/bake-inputs/references/05-physical-evidence.json"
+      "path": "src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json"
     }
   ],
   "sharedInputs": [
diff --git a/src/objects/m42/source/provenance-references.json b/src/objects/m42-volume/source/provenance-references.json
similarity index 55%
rename from src/objects/m42/source/provenance-references.json
rename to src/objects/m42-volume/source/provenance-references.json
index ea399478acc..a33c22ebd7d 100644
--- a/src/objects/m42/source/provenance-references.json
+++ b/src/objects/m42-volume/source/provenance-references.json
@@ -3,27 +3,27 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/m42/physical-evidence.json",
-      "path": "src/objects/m42/source/bake-inputs/references/05-physical-evidence.json",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/05-physical-evidence.json",
       "bytes": 13110
     },
     {
       "originalPath": "labs/nebula/models/m42/compiler.json",
-      "path": "src/objects/m42/source/bake-inputs/references/01-compiler.json",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/01-compiler.json",
       "bytes": 1039
     },
     {
       "originalPath": "labs/nebula/models/m42/observations.json",
-      "path": "src/objects/m42/source/bake-inputs/references/02-observations.json",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/02-observations.json",
       "bytes": 4085
     },
     {
       "originalPath": "labs/nebula/models/m42/observation-structures.json",
-      "path": "src/objects/m42/source/bake-inputs/references/03-observation-structures.json",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/03-observation-structures.json",
       "bytes": 401
     },
     {
       "originalPath": "labs/nebula/models/m42/depth-model.json",
-      "path": "src/objects/m42/source/bake-inputs/references/04-depth-model.json",
+      "path": "src/objects/m42-volume/source/bake-inputs/references/04-depth-model.json",
       "bytes": 3349
     }
   ]
diff --git a/src/objects/m42/source/replay-references.json b/src/objects/m42-volume/source/replay-references.json
similarity index 100%
rename from src/objects/m42/source/replay-references.json
rename to src/objects/m42-volume/source/replay-references.json
diff --git a/src/objects/m42/source/request.json b/src/objects/m42-volume/source/request.json
similarity index 100%
rename from src/objects/m42/source/request.json
rename to src/objects/m42-volume/source/request.json
diff --git a/src/objects/m42/source/stellar-field.json b/src/objects/m42-volume/source/stellar-field.json
similarity index 99%
rename from src/objects/m42/source/stellar-field.json
rename to src/objects/m42-volume/source/stellar-field.json
index 77f0a6c3c72..9996736c6be 100644
--- a/src/objects/m42/source/stellar-field.json
+++ b/src/objects/m42-volume/source/stellar-field.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-gaia-nebula-field@1",
-  "id": "m42",
+  "id": "m42-volume",
   "coordinateEpochJulianYear": 2016,
   "selection": {
     "centerIcrsDegrees": [
diff --git a/src/objects/m42/README.md b/src/objects/m42/README.md
index 6c3d75e07f1..7f5d30e3996 100644
--- a/src/objects/m42/README.md
+++ b/src/objects/m42/README.md
@@ -1,42 +1,16 @@
-# Orion Nebula (M42)
+# Orion Nebula
 
-Two ESO datasets color a coherent, authored ionization-front hypothesis; **optical is the default**. Local literature constraints do not measure the depth of the entire wide field.
+Orion Nebula as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Orion Nebula volume](../m42-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Source / dataset | Selected image and coverage |
-| --- | --- |
-| [ESO optical, eso1723a](https://www.eso.org/public/images/eso1723a/) | i/Hα/r/G display; 4000 × 3106 pixels, 59.95′ × 46.56′. |
-| [ESO VISTA, eso1006a](https://www.eso.org/public/images/eso1006a/) | K/J/Z near-IR display; 3252 × 4000 pixels, 71.84′ × 88.35′. |
-| [Local physical evidence](source/bake-inputs/references/05-physical-evidence.json) | Wen–O’Dell, Henney and later Orion interpretations guide central topology; wide-field curvature and thickness are authored. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m42.json) cites the position, distance and velocity that place it.
 
-Both publisher TIFFs retain their full footprints. Their RGB values are stretched display samples, not common flux units; resolution and coverage differ. The adopted distance is **414 ± 7 pc**, from [Menten et al. (2007), abstract](https://arxiv.org/abs/0709.0485).
+## Processing
 
-The [stellar field](source/stellar-field.json) contains 2780 Gaia candidates in an authored 50 pc sphere, G < 14; 1500 brightness-ranked points are delivered with a spherical fade. Positions use Bailer-Jones distance estimates, with uncertainty intervals retained. Image bounds do not determine stellar depth or selection.
-
-Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
-
-## Evidence
-
-- The [object descriptor](object.json) pins the installed bank; [delivery inputs](source/delivery.json) record saved controls and catalogue preparation. The source manifest distinguishes those inputs from generated delivery bytes.
-- The [fixed lab processing account](../../../labs/nebula/models/m42/README.md) records both-dataset browser checks, native stellar-light accounting and coherent-front projection comparisons. Its older result identities are historical, not a fresh acceptance of the current delivery.
-- This documentation review checks provenance and interpretation; it does not establish a cold replay, independent gas-depth validation or material acceptance.
+1. `pnpm prepare:objects --object=m42` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m42` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- A rectangular optical coverage transition, pale neutral residuals and fine oblique slice bands remain. Adding surrounding stars does not repair the cloud’s photographic boundary.
-- The roughly 0.2 pc star/front distance and 0.1 pc equivalent layer are local published models at the papers’ distance, not whole-field measurements.
-- Orion-S, foreground Veil alternatives, extinction and overlapping fronts remain incomplete. Downloaded central MUSE diagnostic maps have not been fitted; several lack required masks, units or complete WCS.
-
-<details>
-<summary>Methods and historical comparisons</summary>
-
-The [physical ledger](../../../labs/nebula/models/m42/physical-evidence.json) separates observed positions, published models and authored parameters; [depth-model.json](../../../labs/nebula/models/m42/depth-model.json) is the runnable hypothesis. The [fixed lab README](../../../labs/nebula/models/m42/README.md) preserves the earlier 355-support and saved-100%-detail comparisons, including their normalized-image error limits. General preparation is documented in the [nebula guide](../../../docs/nebulae/README.md).
-
-</details>
-
-## Compact delivery inputs
-
-The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
-
-Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m42/inventory.json b/src/objects/m42/inventory.json
index 7e8c6348a76..8c48902bf68 100644
--- a/src/objects/m42/inventory.json
+++ b/src/objects/m42/inventory.json
@@ -3,387 +3,57 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/eso-optical.webp",
+      "filename": "m42-dataset-eso-optical.webp",
       "bytes": 10124,
       "sha256": "c38dfe26cf81b31463ebd80e39b58952ac3d759882fef6b06bcc77b8868d2626"
     },
     {
       "location": "public",
-      "filename": "datasets/eso-vista.webp",
+      "filename": "m42-dataset-eso-vista.webp",
       "bytes": 16000,
       "sha256": "775d2bc1decb89e944da6992f210dd7ab758222de394d2f9a07f2ce088338bfe"
     },
     {
       "location": "prepared",
-      "filename": "datasets.json",
-      "bytes": 3195645,
-      "sha256": "e2b21ff34ae6bd9539e30e97d98ccd18c69f2edc5d3af57d4ce0efeb9193ed77"
-    },
-    {
-      "location": "prepared",
-      "filename": "delivery.json",
-      "bytes": 4669,
-      "sha256": "69694f8d08857ea16d16783200339a513e49f8bb704b97abc2372207b4afe6ef"
-    },
-    {
-      "location": "prepared",
-      "filename": "eso-optical/atlases/x.webp",
-      "bytes": 355254,
-      "sha256": "ec7c830e0ebaad7033766c22a7ba069542f6539a481dd8b000fad978e0b9fbd4"
-    },
-    {
-      "location": "prepared",
-      "filename": "eso-optical/atlases/y.webp",
-      "bytes": 576088,
-      "sha256": "4da5e7a104c045741a7255a32def82e9d3792a9aef575dd87e7c6df5984e3111"
-    },
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-      "location": "prepared",
-      "filename": "eso-optical/atlases/z.webp",
-      "bytes": 411156,
-      "sha256": "04ef1c52b469b0e191e5a819ff6e98f29a8529bf501345d05e4f90853d006953"
-    },
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 }
diff --git a/src/objects/m42/object.json b/src/objects/m42/object.json
index 2f72926f281..300201a9d78 100644
--- a/src/objects/m42/object.json
+++ b/src/objects/m42/object.json
@@ -1,42 +1,96 @@
 {
   "schema": "cssearth-object@2",
   "id": "m42",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
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+      "schema": "cssearth-object-preparation@1",
+      "label": "Orion Nebula",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
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+      "shape": {
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+      },
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+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Orion Nebula",
+      "systemName": "Milky Way",
+      "classification": "nebula",
+      "color": "#9a9a9a",
+      "distanceAu": 85393629.79,
+      "description": "The Orion Nebula is a Milky Way H II region about 414 parsecs away.",
+      "aliases": [
+        "M42",
+        "NGC 1976"
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+      "order": 5143,
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   "prepared": {
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-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m42/source/content/object.json b/src/objects/m42/source/content/object.json
new file mode 100644
index 00000000000..e03bf622861
--- /dev/null
+++ b/src/objects/m42/source/content/object.json
@@ -0,0 +1,107 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m42",
+  "displayName": "Orion Nebula",
+  "panel": {
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+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "414 pc (\u22127 / +7 pc)",
+        "source": {
+          "catalogueId": "menten-2007",
+          "url": "https://arxiv.org/abs/0709.0485",
+          "label": "Menten et al. (2007), The distance to the Orion Nebula",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 83.79\u00b0, Dec -5.4\u00b0",
+        "source": {
+          "catalogueId": "eso-eso1723a",
+          "url": "https://cdn.eso.org/images/publicationtiff/eso1723a.tif",
+          "label": "ESO ESO \u00b7 optical image and publisher astrometry; registration retained in the observation recipe",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "classification",
+        "label": "Classification",
+        "value": "H II region",
+        "source": {
+          "catalogueId": "eso-eso1723a",
+          "url": "https://cdn.eso.org/images/publicationtiff/eso1723a.tif",
+          "label": "ESO ESO \u00b7 optical image and publisher astrometry; registration retained in the observation recipe",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
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+        "label": "ESO \u00b7 optical",
+        "thumbnail": "m42-dataset-eso-optical.webp",
+        "volume": {
+          "objectId": "m42-volume",
+          "datasetId": "eso-optical",
+          "surface": "eso-optical"
+        },
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+          "path": "../../m42-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1723a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "eso-vista",
+        "label": "ESO VISTA \u00b7 infrared",
+        "thumbnail": "m42-dataset-eso-vista.webp",
+        "volume": {
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+          "datasetId": "eso-vista",
+          "surface": "eso-vista"
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+          "url": "https://www.eso.org/public/images/eso1006a/"
+        },
+        "falseColor": false
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+  },
+  "settings": {
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+  "resources": [
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+      "label": "Research",
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+      "description": "Menten et al. (2007), The distance to the Orion Nebula",
+      "href": "https://arxiv.org/abs/0709.0485"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "ESO ESO \u00b7 optical image and publisher astrometry; registration retained in the observation recipe",
+      "href": "https://cdn.eso.org/images/publicationtiff/eso1723a.tif"
+    }
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+      "url": "https://arxiv.org/abs/0709.0485",
+      "credit": "Menten et al. (2007), The distance to the Orion Nebula"
+    }
+  }
+}
diff --git a/src/objects/m42/source/manifest.json b/src/objects/m42/source/manifest.json
index f17b68de25a..238506ace0e 100644
--- a/src/objects/m42/source/manifest.json
+++ b/src/objects/m42/source/manifest.json
@@ -1,258 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "eso-optical",
-      "path": ".local/nebula-lab/observations/m42/sources/eso-optical.tif",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/eso1723a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1723a/",
-      "title": "Orion · eso1723a",
-      "credit": "ESO/G. Beccari",
-      "displayCredit": "ESO/G. Beccari",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
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-      "path": ".local/nebula-lab/observations/m42/sources/eso-vista.tif",
-      "origin": "https://www.eso.org/public/images/eso1006a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1006a/",
-      "title": "Orion · eso1006a",
-      "credit": "ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit",
-      "displayCredit": "ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso1006a",
-            "role": "material",
-            "evidence": "labs/nebula/models/m42/observations.json#/images/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "eso-vista",
+      "credit": "ESO/G. Beccari; the default dataset's picture as the Orion Nebula bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "ESO public-image terms; retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "vista",
-            "evidence": "https://www.eso.org/public/images/eso1006a/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "physical-evidence",
-      "path": "src/objects/m42/source/bake-inputs/references/05-physical-evidence.json",
-      "origin": "https://doi.org/10.1086/175123",
-      "sourceUrl": "https://doi.org/10.1086/175123",
-      "title": "Orion physical-evidence ledger",
-      "credit": "Published Orion structure studies; authored extrapolation",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "wen-odell-1995",
-            "role": "method",
-            "evidence": "src/objects/m42/source/bake-inputs/references/05-physical-evidence.json: /sources/1"
-          },
-          {
-            "catalogueId": "henney-2005",
-            "role": "method",
-            "evidence": "src/objects/m42/source/bake-inputs/references/05-physical-evidence.json: /sources/2"
-          },
-          {
-            "catalogueId": "odell-2009",
-            "role": "method",
-            "evidence": "src/objects/m42/source/bake-inputs/references/05-physical-evidence.json: /sources/3"
-          },
-          {
-            "catalogueId": "odell-abel-2025",
-            "role": "method",
-            "evidence": "src/objects/m42/source/bake-inputs/references/05-physical-evidence.json: /sources/4"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "distance",
-      "path": "src/objects/m42/source/delivery.json",
-      "origin": "https://arxiv.org/abs/0709.0485",
-      "sourceUrl": "https://arxiv.org/abs/0709.0485",
-      "title": "Orion adopted world placement",
-      "credit": "Menten et al. (2007); cssEarth placement",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "menten-2007",
-            "role": "reference",
-            "evidence": "src/objects/m42/source/delivery.json: sky.distancePc = 414; adopted world placement"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "stellar-field",
-      "path": "src/objects/m42/source/stellar-field.json",
-      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "title": "Orion Nebula surrounding Gaia DR3 stellar field",
-      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
-      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
-      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "gaia-dr3-gavo",
-            "role": "material",
-            "evidence": "src/objects/m42/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "bailer-jones-2021-distances",
-            "role": "method",
-            "evidence": "src/objects/m42/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "cardiel-2021-rgb",
-            "role": "method",
-            "evidence": "src/objects/m42/source/stellar-field.json#/provenance"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "gaia",
-            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m42-volume/source/manifest.json)."
       }
     }
   ],
   "documents": [
     {
-      "id": "document-1",
-      "path": "src/objects/m42/source/delivery.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-2",
-      "path": "src/objects/m42/source/nebula.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-3",
-      "path": "src/objects/m42/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-4",
-      "path": "src/objects/m42/source/request.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "retained-evidence-5",
-      "path": "src/objects/m42/source/bake-inputs/references/01-compiler.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-6",
-      "path": "src/objects/m42/source/bake-inputs/references/02-observations.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-7",
-      "path": "src/objects/m42/source/bake-inputs/references/03-observation-structures.json",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "retained-evidence-8",
-      "path": "src/objects/m42/source/bake-inputs/references/04-depth-model.json",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "retained-evidence-9",
-      "path": "src/objects/m42/source/provenance-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-10",
-      "path": "src/objects/m42/source/replay-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
-      }
-    }
-  ],
-  "generatedIntermediates": [
-    {
-      "id": "compact-bake-inputs-json-gz",
-      "path": "src/objects/m42/source/bake-inputs.json.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
+      "path": "preparation/navigation.json"
     }
   ]
 }
diff --git a/src/objects/m42/source/preparation/navigation.json b/src/objects/m42/source/preparation/navigation.json
new file mode 100644
index 00000000000..982101d4a44
--- /dev/null
+++ b/src/objects/m42/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m42",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m42/source/presentation/context.png b/src/objects/m42/source/presentation/context.png
new file mode 100644
index 00000000000..caa5539ddd5
Binary files /dev/null and b/src/objects/m42/source/presentation/context.png differ
diff --git a/src/objects/m42/source/presentation/solar-system.json b/src/objects/m42/source/presentation/solar-system.json
new file mode 100644
index 00000000000..aa4cb76bf85
--- /dev/null
+++ b/src/objects/m42/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m42",
+  "displayName": "Orion Nebula",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 148640444327520.0,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m42/text.json b/src/objects/m42/text.json
new file mode 100644
index 00000000000..c787fbce3d9
--- /dev/null
+++ b/src/objects/m42/text.json
@@ -0,0 +1,58 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m42",
+  "card": {
+    "text": "The Orion Nebula is a Milky Way H II region about 414 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "menten-2007",
+        "url": "https://arxiv.org/abs/0709.0485",
+        "label": "Menten et al. (2007), The distance to the Orion Nebula",
+        "checked": "2026-10-01",
+        "locator": "distance: 414 pc (−7 / +7 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "The Orion Nebula is a Milky Way H II region about 414 parsecs away. Its bright gas surrounds the young Orion Nebula Cluster.",
+    "sources": [
+      {
+        "catalogueId": "menten-2007",
+        "url": "https://arxiv.org/abs/0709.0485",
+        "label": "Menten et al. (2007), The distance to the Orion Nebula",
+        "checked": "2026-10-01",
+        "locator": "distance: 414 pc (−7 / +7 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "eso-optical": {
+      "title": "Orion in visible light",
+      "detail": "4000 × 3106 px",
+      "summary": "Optical display colors on an inferred cloud; physical depth and faint outer structure remain uncertain.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1723a",
+          "url": "https://www.eso.org/public/images/eso1723a/",
+          "label": "Orion · eso1723a; ESO/G. Beccari",
+          "checked": "2026-10-01",
+          "locator": "Orion · eso1723a"
+        }
+      ]
+    },
+    "eso-vista": {
+      "title": "Orion in near infrared",
+      "detail": "3252 × 4000 px",
+      "summary": "Near-infrared false color on the same inferred cloud; the image does not measure its depth.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1006a",
+          "url": "https://www.eso.org/public/images/eso1006a/",
+          "label": "Orion · eso1006a; ESO/J. Emerson/VISTA. Acknowledgment: Cambridge Astronomical Survey Unit",
+          "checked": "2026-10-01",
+          "locator": "Orion · eso1006a"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m45-volume/README.md b/src/objects/m45-volume/README.md
new file mode 100644
index 00000000000..05a9ff66a54
--- /dev/null
+++ b/src/objects/m45-volume/README.md
@@ -0,0 +1,44 @@
+# Pleiades (M45)
+
+Five image datasets share one authored reflection-nebula depth surface. **The default optical composite combines Taavi Niittee’s wide photograph with central NOIRLab detail.** Dust depth, illumination and scattering are not recovered. The catalogue explicitly identifies the Pleiades stellar cluster as the subject of the adopted distance; the nebula uses it for placement. The NOIRLab source carries its published image identity and B/V/I bands, with unknown exposure date and instrument left explicit in that record.
+
+## Sources
+
+| Source / dataset | Selected image and coverage |
+| --- | --- |
+| [Niittee wide optical](https://commons.wikimedia.org/wiki/File:Plejades.jpg) + [NOIRLab](https://noirlab.edu/public/images/noao-m45/) | Default composite: 8000 × 5199-pixel photograph, 264.79′ × 172.08′, observed 2024-01-04; central detail from the separate NOIRLab image. |
+| [NOIRLab optical](https://noirlab.edu/public/images/noao-m45/) | B/V/I display, 4000 × 2920 pixels, 68.68′ × 50.13′; exposure dates unspecified. |
+| [Spitzer IRAC](https://science.nasa.gov/photojournal/pink-pleiades/) | 3.6/4.5/5.8/8 µm false color; 2855² pixels, 58.07′ square. |
+| [Spitzer IRAC + MIPS](https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/) | 4.5/8/24 µm false color; same 58.07′ field. |
+| [WISE](https://science.nasa.gov/photojournal/seven-sisters-get-wise/) | 3.4/4.6/12/22 µm false color; 4007 × 3061 pixels, 182.99′ × 139.79′. |
+
+Niittee’s processed color-camera image uses an L-Pro filter; its delivered pixel count exceeds the sensor grid and does not establish angular resolution. The infrared composites have distinct beams and nonlinear stretches. The cluster scale is **136.2 ± 1.2 pc** from [Melis et al. (2014), main text and Table 1](https://doi.org/10.1126/science.1256101), not a distance for every dust filament.
+
+The [stellar field](source/stellar-field.json) contains 414 Gaia candidates within an authored 20 pc sphere, G < 12. After angular deduplication, 412 use Bailer-Jones distance estimates and eight named Hipparcos stars retain conditional model depths: 420 points shared by all datasets. Neither population establishes dust membership.
+
+Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
+
+## Evidence
+
+- Recorded app checks cover the delivered composite and catalogue field; report context limits their claims.
+- [Delivery](source/delivery.json) pins the compiler and composite recipes. The app composite uses a freshly supplied compiler result; the historical standalone composite remains a separate comparison. This is not a new cold-replay or material acceptance claim.
+- [Historical registration evidence](../../../labs/nebula/models/m45/registration-evidence.json) records relative stellar alignment. Niittee’s 99 held-out stars give 0.450″ RMS only within the central NOIRLab overlap; absolute and outer-field distortion remain unqualified.
+
+## Known problems
+
+- Fine filaments soften, bright-star halos remain, and oblique views can form thin ribbons or show slice/color traces. Prior finite-material trials failed the visual gate.
+- One warped surface cannot represent overlapping foreground/background dust layers. All thicknesses and offsets are authored; the published 0.7 pc scattering-layer hypothesis is not fitted geometry.
+- Each image ends at its own footprint. Wider coverage and exact pixel accounting do not establish complete cloud coverage or calibrated photometry.
+
+<details>
+<summary>Methods and historical comparisons</summary>
+
+The [fixed lab account](../../../labs/nebula/models/m45/README.md) retains historical replay hashes, native separation checks and failed material views. [Physical evidence](../../../labs/nebula/models/m45/physical-evidence.json) scopes the Gibson–Nordsieck and Ritchey interpretations. The [source dossier](../../../labs/nebula/models/m45/source-dossier.json) preserves excluded 2MASS/IRIS and preliminary Usama/Andreo candidates, plus unacquired WISP UV data. General preparation is in the [nebula guide](../../../docs/nebulae/README.md).
+
+</details>
+
+## Compact delivery inputs
+
+The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
+
+Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
diff --git a/src/objects/m45-volume/inventory.json b/src/objects/m45-volume/inventory.json
new file mode 100644
index 00000000000..4a28abd96cd
--- /dev/null
+++ b/src/objects/m45-volume/inventory.json
@@ -0,0 +1,929 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/noirlab-optical.webp",
+      "bytes": 11712,
+      "sha256": "7fe8aff6569baac0de4114d5c32ba685790f91e9196a8da414219bb1ec4e0dc5"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/optical-composite.webp",
+      "bytes": 14636,
+      "sha256": "b320e0f1b2b860bd1c084220be8bcbdea272887211883fbf0da265d0ab6cf279"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/spitzer-irac-mips.webp",
+      "bytes": 13854,
+      "sha256": "d818371e5d4d7337d4a8976bb3362e5e781c116bad69baaa6771ff49cff2fd8a"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/spitzer-irac.webp",
+      "bytes": 14772,
+      "sha256": "6a120665b6b734750f1ba4c2a052456f643c3563234438f5e61329550c61ee40"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/wise-four-band.webp",
+      "bytes": 20398,
+      "sha256": "c8787fbbd36c883b164b7dde13eba0818efa649c253d62ff45571b6157145011"
+    },
+    {
+      "location": "prepared",
+      "filename": "datasets.json",
+      "bytes": 2633681,
+      "sha256": "7ddccb1a8bc3ce92dd2e49840fc2f90486301196679c3f75bac245959a546dca"
+    },
+    {
+      "location": "prepared",
+      "filename": "delivery.json",
+      "bytes": 4586,
+      "sha256": "68a2d4686a317cd84b6f3dc87432e22e7599effb2d901e62f4f1b4a9f6f50954"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/atlases/x.webp",
+      "bytes": 288348,
+      "sha256": "2a1f30c55d98f43cdee2848034a6b404320165ba9ad74ae9d78e052bb0099491"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/atlases/y.webp",
+      "bytes": 350264,
+      "sha256": "5cee049f4e20d2f815541b2b033fa89b5aa018db804983b4f2a2a614c6d90ecf"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/atlases/z.webp",
+      "bytes": 199766,
+      "sha256": "ae6d655f4c76508ff83d81015b1b848647e0597227c975d563f0c517625ca479"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/impostors/view-00n.png",
+      "bytes": 24493,
+      "sha256": "ba01084ed69fd7ab49b44a2aee0318faf7b1da83d64492d94fd5c36be4febde8"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/impostors/view-00p.png",
+      "bytes": 24427,
+      "sha256": "7e930f41066714df3edbe547ac829966f96eee02c5bf626e82b5bcfe1d9b5043"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/impostors/view-0n0.png",
+      "bytes": 3162,
+      "sha256": "bad9d82ab5a834b1131a2026fa96331b1f37d34d796c053a30a4066b9257ca48"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/impostors/view-0nn.png",
+      "bytes": 20611,
+      "sha256": "e2d99331f14b6cdeb6831ae22c786f62a8c0208ba59584e1ed32910dad22592d"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/impostors/view-0np.png",
+      "bytes": 20108,
+      "sha256": "6f16ad0263b4b5786dc5b0dffa7a878859b6960dbe708b7fc1c9ea905b2f6a32"
+    },
+    {
+      "location": "prepared",
+      "filename": "noirlab-optical/impostors/view-0p0.png",
+      "bytes": 3159,
+      "sha256": "acda3e9b568900127c2c7e8a7531f3652332f3075dcc729e90996770cdfbf9ae"
+    },
+    {
+      "location": "prepared",
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+}
diff --git a/src/objects/m45/investigations.json b/src/objects/m45-volume/investigations.json
similarity index 96%
rename from src/objects/m45/investigations.json
rename to src/objects/m45-volume/investigations.json
index 82d38056089..71fe31fd4b6 100644
--- a/src/objects/m45/investigations.json
+++ b/src/objects/m45-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "m45",
+  "objectId": "m45-volume",
   "entries": [
     {
       "id": "dataset-optical-composite",
@@ -8,10 +8,10 @@
       "status": "included",
       "finding": "Default dataset fuses registered Niittee wide optical color with central NOIRLab luminance detail on the same authored cloud. The app recipe accepts the freshly supplied compiler result; the older standalone composite is historical and its failed oblique material assessment is not reclassified.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/processing-observations.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/delivery.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/optical-composite.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/optical-composite-observations.json"
       ]
@@ -22,7 +22,7 @@
       "status": "included",
       "finding": "Selected full-footprint 4000 by 2920 publication TIFF, B/V/I, 68.68 by 50.13 arcmin. Publisher AVM anchors the frame; saturated cores, halos and display stretch remain. The 9700 by 7080 master is a separately identified, initially unacquired source.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/processing-observations.json"
       ]
@@ -33,7 +33,7 @@
       "status": "included",
       "finding": "IRAC 3.6/4.5/5.8/8 micrometre false-color display, 2855² pixels and 58.07 arcmin square. Original decoded RGB equality and native separation accounting are recorded; these are not calibrated band flux or depth measurements.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/processing-observations.json"
       ]
@@ -44,7 +44,7 @@
       "status": "included",
       "finding": "IRAC 4.5/8 plus MIPS 24 micrometre false color on the same 2855² publisher field. Different beams and display mapping remain explicit; a 24 micrometre resampled pixel does not inherit IRAC resolution.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/processing-observations.json"
       ]
@@ -55,7 +55,7 @@
       "status": "included",
       "finding": "Four-band 3.4/4.6/12/22 micrometre display, 4007 by 3061 pixels over 182.99 by 139.79 arcmin. The publisher SIN projection is retained; stellar artifacts and emission beyond the mosaic remain.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/processing-observations.json"
       ]
@@ -66,8 +66,8 @@
       "status": "included",
       "finding": "414 Gaia candidates in an authored 20 pc sphere, G < 12; two angular matches are deduplicated and eight named Hipparcos stars remain, yielding 420 points. Named-star depths remain conditional, distinct from Gaia distances. Actual catalogue source IDs, median distances and uncertainty intervals are retained. Sphere, quality cuts, budget, brightness response and fade are display selections, not a membership survey; Cardiel BP-RP display color uses a neutral fallback outside its valid range.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/stellar-field.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/delivery.json",
         "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
         "https://arxiv.org/abs/2012.05220",
         "https://arxiv.org/abs/2107.08734"
@@ -81,7 +81,7 @@
       "evidence": [
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/source-dossier.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/registration-evidence.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/delivery.json",
         "https://commons.wikimedia.org/wiki/File:Plejades.jpg"
       ]
     },
@@ -91,9 +91,9 @@
       "status": "included",
       "finding": "136.2 ± 1.2 pc is the VLBI cluster scale; the eight retained named Hipparcos stars come from the earlier observed-star preparation. Neither the common scale nor conditional named-star depths measure individual dust distance. The older 450-star catalogue remains a processing baseline, not the current surrounding field.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/nebula.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/nebula.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m45/stellar-evidence.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m45-volume/source/stellar-field.json",
         "https://doi.org/10.1126/science.1256101"
       ]
     },
diff --git a/src/objects/m45-volume/object.json b/src/objects/m45-volume/object.json
new file mode 100644
index 00000000000..aa4bc505477
--- /dev/null
+++ b/src/objects/m45-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "m45-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        2119510582205373200,
+        3194281146813442000,
+        1726240478294435000
+      ],
+      "localToReferenceXyzw": [
+        0.15558031632998595,
+        0.521053271530124,
+        0.8041433741265512,
+        0.2401076576179564
+      ],
+      "metersPerUnit": 20375229989339.996,
+      "boundsUnits": {
+        "min": [
+          -6557.586819211976,
+          -7242.732332445644,
+          -1667.0039128936846
+        ],
+        "max": [
+          6557.586819211976,
+          7242.732332445644,
+          1667.0039128936846
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/delivery.json"
+    },
+    "host": "m45"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/m45/source/bake-inputs.json.gz b/src/objects/m45-volume/source/bake-inputs.json.gz
similarity index 100%
rename from src/objects/m45/source/bake-inputs.json.gz
rename to src/objects/m45-volume/source/bake-inputs.json.gz
diff --git a/src/objects/m45/source/bake-inputs/references/01-compiler.json b/src/objects/m45-volume/source/bake-inputs/references/01-compiler.json
similarity index 97%
rename from src/objects/m45/source/bake-inputs/references/01-compiler.json
rename to src/objects/m45-volume/source/bake-inputs/references/01-compiler.json
index 51734e4b2c9..e4baf4846c2 100644
--- a/src/objects/m45/source/bake-inputs/references/01-compiler.json
+++ b/src/objects/m45-volume/source/bake-inputs/references/01-compiler.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-compiler@1",
-  "id": "m45",
+  "id": "m45-volume",
   "label": "Pleiades",
   "observationRecipe": "labs/nebula/models/m45/processing-observations.json",
   "observationCatalogue": ".local/nebula-lab/observations/m45-processing/observations.json",
diff --git a/src/objects/m45/source/bake-inputs/references/02-depth-model.json b/src/objects/m45-volume/source/bake-inputs/references/02-depth-model.json
similarity index 96%
rename from src/objects/m45/source/bake-inputs/references/02-depth-model.json
rename to src/objects/m45-volume/source/bake-inputs/references/02-depth-model.json
index 51f51f76341..ddbf000ba69 100644
--- a/src/objects/m45/source/bake-inputs/references/02-depth-model.json
+++ b/src/objects/m45-volume/source/bake-inputs/references/02-depth-model.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-depth-model@1",
-  "id": "m45",
+  "id": "m45-volume",
   "centerIcrsDegrees": [
     56.75,
     24.1167
@@ -32,9 +32,9 @@
       -0.012
     ],
     "curvaturePerArcsec": [
-      0.000003,
-      0.000002,
-      -0.000002
+      3e-06,
+      2e-06,
+      -2e-06
     ],
     "thicknessArcsec": 150,
     "strength": 1,
@@ -65,9 +65,9 @@
         0.03
       ],
       "curvaturePerArcsec": [
-        0.00002,
-        -0.000015,
-        0.000008
+        2e-05,
+        -1.5e-05,
+        8e-06
       ],
       "thicknessArcsec": 100,
       "strength": 0.85,
diff --git a/src/objects/m45/source/bake-inputs/references/03-observation-structures.json b/src/objects/m45-volume/source/bake-inputs/references/03-observation-structures.json
similarity index 100%
rename from src/objects/m45/source/bake-inputs/references/03-observation-structures.json
rename to src/objects/m45-volume/source/bake-inputs/references/03-observation-structures.json
diff --git a/src/objects/m45/source/bake-inputs/references/04-physical-evidence.json b/src/objects/m45-volume/source/bake-inputs/references/04-physical-evidence.json
similarity index 100%
rename from src/objects/m45/source/bake-inputs/references/04-physical-evidence.json
rename to src/objects/m45-volume/source/bake-inputs/references/04-physical-evidence.json
diff --git a/src/objects/m45/source/bake-inputs/references/05-processing-observations.json b/src/objects/m45-volume/source/bake-inputs/references/05-processing-observations.json
similarity index 100%
rename from src/objects/m45/source/bake-inputs/references/05-processing-observations.json
rename to src/objects/m45-volume/source/bake-inputs/references/05-processing-observations.json
diff --git a/src/objects/m45/source/bake-inputs/references/06-stellar-catalogue.json b/src/objects/m45-volume/source/bake-inputs/references/06-stellar-catalogue.json
similarity index 100%
rename from src/objects/m45/source/bake-inputs/references/06-stellar-catalogue.json
rename to src/objects/m45-volume/source/bake-inputs/references/06-stellar-catalogue.json
diff --git a/src/objects/m45/source/bake-inputs/references/07-optical-composite-observations.json b/src/objects/m45-volume/source/bake-inputs/references/07-optical-composite-observations.json
similarity index 100%
rename from src/objects/m45/source/bake-inputs/references/07-optical-composite-observations.json
rename to src/objects/m45-volume/source/bake-inputs/references/07-optical-composite-observations.json
diff --git a/src/objects/m45/source/bake-inputs/references/08-optical-composite.json b/src/objects/m45-volume/source/bake-inputs/references/08-optical-composite.json
similarity index 100%
rename from src/objects/m45/source/bake-inputs/references/08-optical-composite.json
rename to src/objects/m45-volume/source/bake-inputs/references/08-optical-composite.json
diff --git a/src/objects/m45/source/delivery.json b/src/objects/m45-volume/source/delivery.json
similarity index 88%
rename from src/objects/m45/source/delivery.json
rename to src/objects/m45-volume/source/delivery.json
index 6b552996cbf..858270a603b 100644
--- a/src/objects/m45/source/delivery.json
+++ b/src/objects/m45-volume/source/delivery.json
@@ -1,9 +1,9 @@
 {
   "schema": "cssearth-nebula-delivery@2",
-  "id": "m45",
+  "id": "m45-volume",
   "method": "compiler",
   "request": {
-    "path": "src/objects/m45/source/request.json"
+    "path": "src/objects/m45-volume/source/request.json"
   },
   "inputPins": [
     {
@@ -46,10 +46,10 @@
     "path": "labs/nebula/models/m45/optical-composite.json"
   },
   "fieldStars": {
-    "path": "src/objects/m45/source/stellar-field.json"
+    "path": "src/objects/m45-volume/source/stellar-field.json"
   },
   "compactInputs": {
-    "path": "src/objects/m45/source/bake-inputs.json.gz"
+    "path": "src/objects/m45-volume/source/bake-inputs.json.gz"
   },
   "compactMethod": "compiler"
 }
diff --git a/src/objects/m45-volume/source/manifest.json b/src/objects/m45-volume/source/manifest.json
new file mode 100644
index 00000000000..b6c0714463e
--- /dev/null
+++ b/src/objects/m45-volume/source/manifest.json
@@ -0,0 +1,402 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "noirlab-optical",
+      "path": ".local/nebula-lab/observations/m45-processing/sources/noirlab-optical.tif",
+      "origin": "https://noirlab.edu/public/images/noao-m45/",
+      "sourceUrl": "https://noirlab.edu/public/images/noao-m45/",
+      "title": "Pleiades · NOIRLab · optical B / V / I",
+      "credit": "NOIRLab/NSF/AURA/T.A. Rector (University of Alaska Anchorage), R. Cool (University of Arizona) and WIYN",
+      "displayCredit": "NOIRLab/NSF/AURA/T.A. Rector (University of Alaska Anchorage), R. Cool (University of Arizona) and WIYN",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noao-m45",
+            "role": "material",
+            "evidence": "labs/nebula/models/m45/processing-observations.json#/images/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "noirlab-optical",
+      "license": "Provider terms: https://noirlab.edu/public/about/image-usage/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "wiyn-0-9m",
+            "evidence": "https://noirlab.edu/public/images/noao-m45/ — NOIRLab-curated mirror https://www.astropix.org/image/noirlab/noao-m45 identifies Mosaic on the WIYN 0.9-metre telescope"
+          }
+        ],
+        "observation": {
+          "id": "noao-m45",
+          "target": "Pleiades",
+          "observedAt": null,
+          "instrument": null,
+          "bands": "Optical B 436 nm / V 537 nm / I 805 nm",
+          "evidence": "labs/nebula/models/m45/processing-observations.json#/images/0; exposure date and instrument are not specified in that pinned record."
+        }
+      }
+    },
+    {
+      "id": "spitzer-irac",
+      "path": ".local/nebula-lab/observations/m45-processing/sources/spitzer-irac.tif",
+      "origin": "https://science.nasa.gov/photojournal/pink-pleiades/",
+      "sourceUrl": "https://science.nasa.gov/photojournal/pink-pleiades/",
+      "title": "Pleiades · Spitzer · IRAC 3.6–8 µm",
+      "credit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
+      "displayCredit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "nasa-pia09262",
+            "role": "material",
+            "evidence": "labs/nebula/models/m45/processing-observations.json#/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "spitzer-irac",
+      "license": "Provider terms: https://www.spitzer.caltech.edu/page/image-use-policy. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "spitzer",
+            "evidence": "https://science.nasa.gov/photojournal/pink-pleiades/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "spitzer-irac-mips",
+      "path": ".local/nebula-lab/observations/m45-processing/sources/spitzer-irac-mips.tif",
+      "origin": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/",
+      "sourceUrl": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/",
+      "title": "Pleiades · Spitzer · IRAC + MIPS 4.5–24 µm",
+      "credit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
+      "displayCredit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "nasa-pia09263",
+            "role": "material",
+            "evidence": "labs/nebula/models/m45/processing-observations.json#/images/2"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "spitzer-irac-mips",
+      "license": "Provider terms: https://www.spitzer.caltech.edu/page/image-use-policy. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "spitzer",
+            "evidence": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "wise-four-band",
+      "path": ".local/nebula-lab/observations/m45-processing/sources/wise-four-band.tif",
+      "origin": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/",
+      "sourceUrl": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/",
+      "title": "Pleiades · WISE · 3.4–22 µm wide field",
+      "credit": "NASA/JPL-Caltech/UCLA",
+      "displayCredit": "NASA/JPL-Caltech/UCLA",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "nasa-pia13121",
+            "role": "material",
+            "evidence": "labs/nebula/models/m45/processing-observations.json#/images/3"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "wise-four-band",
+      "license": "Provider terms: https://www.jpl.nasa.gov/jpl-image-use-policy/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "wise",
+            "evidence": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "niittee-widefield",
+      "path": ".local/nebula-lab/observations/m45-optical-composite/sources/niittee-widefield.tif",
+      "origin": "https://commons.wikimedia.org/wiki/File:Plejades.jpg",
+      "sourceUrl": "https://commons.wikimedia.org/wiki/File:Plejades.jpg",
+      "title": "Pleiades · Tõrva / Niittee · wide optical",
+      "credit": "Taavi Niittee / Tõrva Astronomy Club",
+      "displayCredit": "Taavi Niittee / Tõrva Astronomy Club",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "niittee-plejades",
+            "role": "material",
+            "evidence": "labs/nebula/models/m45/optical-composite-observations.json#/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "optical-composite",
+      "license": "Provider terms: https://creativecommons.org/licenses/by/4.0/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "niittee-sharpstar-61edph-iii",
+            "evidence": "https://commons.wikimedia.org/wiki/File:Plejades.jpg — author’s Equipment Used: Sharpstar 61EDPH III, ZWO ASI071MC Pro; Tõrva, Estonia"
+          }
+        ]
+      }
+    },
+    {
+      "id": "physical-evidence",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/04-physical-evidence.json",
+      "origin": "https://doi.org/10.1086/374590",
+      "sourceUrl": "https://doi.org/10.1086/374590",
+      "title": "Pleiades physical evidence and authored limits",
+      "credit": "Published structural studies; authored display assumptions",
+      "acquisition": "Checked-in evidence ledger. This pin identifies the metadata record; cited publications and native scientific arrays retain their own identities. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "gibson-nordsieck-2003-ii",
+            "role": "method",
+            "evidence": "src/objects/m45-volume/source/bake-inputs/references/04-physical-evidence.json#/sources/1"
+          },
+          {
+            "catalogueId": "ritchey-2006",
+            "role": "method",
+            "evidence": "src/objects/m45-volume/source/bake-inputs/references/04-physical-evidence.json#/sources/5"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "observed-stars",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/06-stellar-catalogue.json",
+      "origin": "https://cdsarc.cds.unistra.fr/viz-bin/cat/I/239",
+      "sourceUrl": "https://cdsarc.cds.unistra.fr/viz-bin/cat/I/239",
+      "title": "Pleiades field stars · Hipparcos and Tycho-2",
+      "credit": "ESA (1997); Høg et al. (2000); CDS/VizieR",
+      "acquisition": "Checked-in normalized stellar catalogue from the two pinned CDS cone queries, preserving native astrometry and photometry. Johnson transformations and display-star selection are documented in the stellar source receipt. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "hipparcos-esa-1997",
+            "role": "material",
+            "evidence": "labs/nebula/models/m45/stellar-sources.json#/sources/0"
+          },
+          {
+            "catalogueId": "tycho2-hog-2000",
+            "role": "material",
+            "evidence": "labs/nebula/models/m45/stellar-sources.json#/sources/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "hipparcos",
+            "evidence": "https://www.esa.int/Science_Exploration/Space_Science/Hipparcos_overview — main instrument and star mapper produced Hipparcos and Tycho; stellar-sources.json pins both catalogue extracts. Tycho-2 proper motions also combine historical catalogues."
+          }
+        ]
+      }
+    },
+    {
+      "id": "distance",
+      "path": "src/objects/m45-volume/source/delivery.json",
+      "origin": "https://arxiv.org/pdf/1408.6544",
+      "sourceUrl": "https://arxiv.org/pdf/1408.6544",
+      "title": "Pleiades adopted world placement",
+      "credit": "Melis et al. (2014), A VLBI Resolution of the Pleiades Distance Controversy",
+      "acquisition": "Checked-in delivery record. The pin identifies our placement metadata, not downloaded paper bytes; the adopted value and uncertainty are explained in the body README.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "melis-2014",
+            "role": "reference",
+            "evidence": "src/objects/m45-volume/source/delivery.json#/sky/distancePc"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "stellar-field",
+      "path": "src/objects/m45-volume/source/stellar-field.json",
+      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "title": "Pleiades surrounding Gaia DR3 stellar field",
+      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
+      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
+      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "gaia-dr3-gavo",
+            "role": "material",
+            "evidence": "src/objects/m45-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "bailer-jones-2021-distances",
+            "role": "method",
+            "evidence": "src/objects/m45-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "cardiel-2021-rgb",
+            "role": "method",
+            "evidence": "src/objects/m45-volume/source/stellar-field.json#/provenance"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "gaia",
+            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-1",
+      "path": "src/objects/m45-volume/source/delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/m45-volume/source/nebula.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-3",
+      "path": "src/objects/m45-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/m45-volume/source/request.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "retained-evidence-5",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/01-compiler.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-6",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/02-depth-model.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-7",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/03-observation-structures.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-8",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/05-processing-observations.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-9",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/07-optical-composite-observations.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-10",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/08-optical-composite.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-11",
+      "path": "src/objects/m45-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-12",
+      "path": "src/objects/m45-volume/source/replay-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
+      }
+    }
+  ],
+  "generatedIntermediates": [
+    {
+      "id": "compact-bake-inputs-json-gz",
+      "path": "src/objects/m45-volume/source/bake-inputs.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    }
+  ]
+}
diff --git a/src/objects/m45/source/nebula.json b/src/objects/m45-volume/source/nebula.json
similarity index 98%
rename from src/objects/m45/source/nebula.json
rename to src/objects/m45-volume/source/nebula.json
index ad60030c319..95d2abe18a0 100644
--- a/src/objects/m45/source/nebula.json
+++ b/src/objects/m45-volume/source/nebula.json
@@ -64,7 +64,7 @@
         "sourceRef": "m45-registered-frame"
       },
       "status": "confirmed",
-      "detailedObjectId": "m45"
+      "detailedObjectId": "m45-volume"
     }
   ]
 }
diff --git a/src/objects/m45/source/presentation.json b/src/objects/m45-volume/source/presentation.json
similarity index 89%
rename from src/objects/m45/source/presentation.json
rename to src/objects/m45-volume/source/presentation.json
index a09178b467f..6091047942d 100644
--- a/src/objects/m45/source/presentation.json
+++ b/src/objects/m45-volume/source/presentation.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m45",
+  "objectId": "m45-volume",
   "name": "Pleiades",
   "defaultDataset": "optical-composite",
   "sharedInputs": [
@@ -167,48 +167,48 @@
     }
   ],
   "bank": {
-    "path": "src/objects/m45/prepared/datasets.json"
+    "path": "src/objects/m45-volume/prepared/datasets.json"
   },
   "recipes": [
     {
       "id": "recipe-1",
-      "path": "src/objects/m45/source/delivery.json"
+      "path": "src/objects/m45-volume/source/delivery.json"
     },
     {
       "id": "recipe-2",
-      "path": "src/objects/m45/source/request.json"
+      "path": "src/objects/m45-volume/source/request.json"
     },
     {
       "id": "recipe-3",
-      "path": "src/objects/m45/source/bake-inputs/references/01-compiler.json"
+      "path": "src/objects/m45-volume/source/bake-inputs/references/01-compiler.json"
     },
     {
       "id": "recipe-4",
-      "path": "src/objects/m45/source/bake-inputs/references/02-depth-model.json"
+      "path": "src/objects/m45-volume/source/bake-inputs/references/02-depth-model.json"
     },
     {
       "id": "recipe-5",
-      "path": "src/objects/m45/source/bake-inputs/references/03-observation-structures.json"
+      "path": "src/objects/m45-volume/source/bake-inputs/references/03-observation-structures.json"
     },
     {
       "id": "recipe-6",
-      "path": "src/objects/m45/source/bake-inputs/references/04-physical-evidence.json"
+      "path": "src/objects/m45-volume/source/bake-inputs/references/04-physical-evidence.json"
     },
     {
       "id": "recipe-7",
-      "path": "src/objects/m45/source/bake-inputs/references/05-processing-observations.json"
+      "path": "src/objects/m45-volume/source/bake-inputs/references/05-processing-observations.json"
     },
     {
       "id": "recipe-8",
-      "path": "src/objects/m45/source/bake-inputs/references/06-stellar-catalogue.json"
+      "path": "src/objects/m45-volume/source/bake-inputs/references/06-stellar-catalogue.json"
     },
     {
       "id": "recipe-9",
-      "path": "src/objects/m45/source/bake-inputs/references/07-optical-composite-observations.json"
+      "path": "src/objects/m45-volume/source/bake-inputs/references/07-optical-composite-observations.json"
     },
     {
       "id": "recipe-10",
-      "path": "src/objects/m45/source/bake-inputs/references/08-optical-composite.json"
+      "path": "src/objects/m45-volume/source/bake-inputs/references/08-optical-composite.json"
     }
   ],
   "inputEvidence": [
diff --git a/src/objects/m45/source/provenance-references.json b/src/objects/m45-volume/source/provenance-references.json
similarity index 54%
rename from src/objects/m45/source/provenance-references.json
rename to src/objects/m45-volume/source/provenance-references.json
index f896f40f8f0..c55bd7228ed 100644
--- a/src/objects/m45/source/provenance-references.json
+++ b/src/objects/m45-volume/source/provenance-references.json
@@ -3,42 +3,42 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/m45/physical-evidence.json",
-      "path": "src/objects/m45/source/bake-inputs/references/04-physical-evidence.json",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/04-physical-evidence.json",
       "bytes": 15400
     },
     {
       "originalPath": "labs/nebula/models/m45/stellar-catalogue.json",
-      "path": "src/objects/m45/source/bake-inputs/references/06-stellar-catalogue.json",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/06-stellar-catalogue.json",
       "bytes": 1654998
     },
     {
       "originalPath": "labs/nebula/models/m45/compiler.json",
-      "path": "src/objects/m45/source/bake-inputs/references/01-compiler.json",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/01-compiler.json",
       "bytes": 1147
     },
     {
       "originalPath": "labs/nebula/models/m45/depth-model.json",
-      "path": "src/objects/m45/source/bake-inputs/references/02-depth-model.json",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/02-depth-model.json",
       "bytes": 3319
     },
     {
       "originalPath": "labs/nebula/models/m45/observation-structures.json",
-      "path": "src/objects/m45/source/bake-inputs/references/03-observation-structures.json",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/03-observation-structures.json",
       "bytes": 423
     },
     {
       "originalPath": "labs/nebula/models/m45/processing-observations.json",
-      "path": "src/objects/m45/source/bake-inputs/references/05-processing-observations.json",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/05-processing-observations.json",
       "bytes": 8832
     },
     {
       "originalPath": "labs/nebula/models/m45/optical-composite-observations.json",
-      "path": "src/objects/m45/source/bake-inputs/references/07-optical-composite-observations.json",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/07-optical-composite-observations.json",
       "bytes": 5257
     },
     {
       "originalPath": "labs/nebula/models/m45/optical-composite.json",
-      "path": "src/objects/m45/source/bake-inputs/references/08-optical-composite.json",
+      "path": "src/objects/m45-volume/source/bake-inputs/references/08-optical-composite.json",
       "bytes": 1320
     }
   ]
diff --git a/src/objects/m45/source/replay-references.json b/src/objects/m45-volume/source/replay-references.json
similarity index 100%
rename from src/objects/m45/source/replay-references.json
rename to src/objects/m45-volume/source/replay-references.json
diff --git a/src/objects/m45/source/request.json b/src/objects/m45-volume/source/request.json
similarity index 100%
rename from src/objects/m45/source/request.json
rename to src/objects/m45-volume/source/request.json
diff --git a/src/objects/m45/source/stellar-field.json b/src/objects/m45-volume/source/stellar-field.json
similarity index 99%
rename from src/objects/m45/source/stellar-field.json
rename to src/objects/m45-volume/source/stellar-field.json
index f3437595c5f..fda7585665f 100644
--- a/src/objects/m45/source/stellar-field.json
+++ b/src/objects/m45-volume/source/stellar-field.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-gaia-nebula-field@1",
-  "id": "m45",
+  "id": "m45-volume",
   "coordinateEpochJulianYear": 2016,
   "selection": {
     "centerIcrsDegrees": [
@@ -278,7 +278,7 @@
       "parallaxMas": 7.3735647,
       "parallaxErrorMas": 0.038997106,
       "photGMeanMag": 6.7019362,
-      "bpRp": 0.00007669999999926347,
+      "bpRp": 7.669999999926347e-05,
       "ruwe": 0.95297456,
       "distancePc": 134.90875,
       "distanceLowerPc": 134.2208,
diff --git a/src/objects/m45/README.md b/src/objects/m45/README.md
index 05a9ff66a54..7f68deffbcb 100644
--- a/src/objects/m45/README.md
+++ b/src/objects/m45/README.md
@@ -1,44 +1,16 @@
-# Pleiades (M45)
+# Pleiades
 
-Five image datasets share one authored reflection-nebula depth surface. **The default optical composite combines Taavi Niittee’s wide photograph with central NOIRLab detail.** Dust depth, illumination and scattering are not recovered. The catalogue explicitly identifies the Pleiades stellar cluster as the subject of the adopted distance; the nebula uses it for placement. The NOIRLab source carries its published image identity and B/V/I bands, with unknown exposure date and instrument left explicit in that record.
+Pleiades as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Pleiades volume](../m45-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Source / dataset | Selected image and coverage |
-| --- | --- |
-| [Niittee wide optical](https://commons.wikimedia.org/wiki/File:Plejades.jpg) + [NOIRLab](https://noirlab.edu/public/images/noao-m45/) | Default composite: 8000 × 5199-pixel photograph, 264.79′ × 172.08′, observed 2024-01-04; central detail from the separate NOIRLab image. |
-| [NOIRLab optical](https://noirlab.edu/public/images/noao-m45/) | B/V/I display, 4000 × 2920 pixels, 68.68′ × 50.13′; exposure dates unspecified. |
-| [Spitzer IRAC](https://science.nasa.gov/photojournal/pink-pleiades/) | 3.6/4.5/5.8/8 µm false color; 2855² pixels, 58.07′ square. |
-| [Spitzer IRAC + MIPS](https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/) | 4.5/8/24 µm false color; same 58.07′ field. |
-| [WISE](https://science.nasa.gov/photojournal/seven-sisters-get-wise/) | 3.4/4.6/12/22 µm false color; 4007 × 3061 pixels, 182.99′ × 139.79′. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m45.json) cites the position, distance and velocity that place it.
 
-Niittee’s processed color-camera image uses an L-Pro filter; its delivered pixel count exceeds the sensor grid and does not establish angular resolution. The infrared composites have distinct beams and nonlinear stretches. The cluster scale is **136.2 ± 1.2 pc** from [Melis et al. (2014), main text and Table 1](https://doi.org/10.1126/science.1256101), not a distance for every dust filament.
+## Processing
 
-The [stellar field](source/stellar-field.json) contains 414 Gaia candidates within an authored 20 pc sphere, G < 12. After angular deduplication, 412 use Bailer-Jones distance estimates and eight named Hipparcos stars retain conditional model depths: 420 points shared by all datasets. Neither population establishes dust membership.
-
-Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
-
-## Evidence
-
-- Recorded app checks cover the delivered composite and catalogue field; report context limits their claims.
-- [Delivery](source/delivery.json) pins the compiler and composite recipes. The app composite uses a freshly supplied compiler result; the historical standalone composite remains a separate comparison. This is not a new cold-replay or material acceptance claim.
-- [Historical registration evidence](../../../labs/nebula/models/m45/registration-evidence.json) records relative stellar alignment. Niittee’s 99 held-out stars give 0.450″ RMS only within the central NOIRLab overlap; absolute and outer-field distortion remain unqualified.
+1. `pnpm prepare:objects --object=m45` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m45` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- Fine filaments soften, bright-star halos remain, and oblique views can form thin ribbons or show slice/color traces. Prior finite-material trials failed the visual gate.
-- One warped surface cannot represent overlapping foreground/background dust layers. All thicknesses and offsets are authored; the published 0.7 pc scattering-layer hypothesis is not fitted geometry.
-- Each image ends at its own footprint. Wider coverage and exact pixel accounting do not establish complete cloud coverage or calibrated photometry.
-
-<details>
-<summary>Methods and historical comparisons</summary>
-
-The [fixed lab account](../../../labs/nebula/models/m45/README.md) retains historical replay hashes, native separation checks and failed material views. [Physical evidence](../../../labs/nebula/models/m45/physical-evidence.json) scopes the Gibson–Nordsieck and Ritchey interpretations. The [source dossier](../../../labs/nebula/models/m45/source-dossier.json) preserves excluded 2MASS/IRIS and preliminary Usama/Andreo candidates, plus unacquired WISP UV data. General preparation is in the [nebula guide](../../../docs/nebulae/README.md).
-
-</details>
-
-## Compact delivery inputs
-
-The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
-
-Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m45/inventory.json b/src/objects/m45/inventory.json
index 547d7ea11e6..1432e25584b 100644
--- a/src/objects/m45/inventory.json
+++ b/src/objects/m45/inventory.json
@@ -3,927 +3,75 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/noirlab-optical.webp",
+      "filename": "m45-dataset-noirlab-optical.webp",
       "bytes": 11712,
       "sha256": "7fe8aff6569baac0de4114d5c32ba685790f91e9196a8da414219bb1ec4e0dc5"
     },
     {
       "location": "public",
-      "filename": "datasets/optical-composite.webp",
+      "filename": "m45-dataset-optical-composite.webp",
       "bytes": 14636,
       "sha256": "b320e0f1b2b860bd1c084220be8bcbdea272887211883fbf0da265d0ab6cf279"
     },
     {
       "location": "public",
-      "filename": "datasets/spitzer-irac-mips.webp",
+      "filename": "m45-dataset-spitzer-irac-mips.webp",
       "bytes": 13854,
       "sha256": "d818371e5d4d7337d4a8976bb3362e5e781c116bad69baaa6771ff49cff2fd8a"
     },
     {
       "location": "public",
-      "filename": "datasets/spitzer-irac.webp",
+      "filename": "m45-dataset-spitzer-irac.webp",
       "bytes": 14772,
       "sha256": "6a120665b6b734750f1ba4c2a052456f643c3563234438f5e61329550c61ee40"
     },
     {
       "location": "public",
-      "filename": "datasets/wise-four-band.webp",
+      "filename": "m45-dataset-wise-four-band.webp",
       "bytes": 20398,
       "sha256": "c8787fbbd36c883b164b7dde13eba0818efa649c253d62ff45571b6157145011"
     },
     {
       "location": "prepared",
-      "filename": "datasets.json",
-      "bytes": 5677355,
-      "sha256": "538c06e2bf8d78707c15e6b4f2c873a1eb692cb1ebc066375e409dacb8df91c2"
-    },
-    {
-      "location": "prepared",
-      "filename": "delivery.json",
-      "bytes": 5624,
-      "sha256": "6970b606a4ed09401dfec5dec6791a1ffb73fe95102021c5c21b3b0e2fc7d6c8"
-    },
-    {
-      "location": "prepared",
-      "filename": "noirlab-optical/atlases/x.webp",
-      "bytes": 288348,
-      "sha256": "2a1f30c55d98f43cdee2848034a6b404320165ba9ad74ae9d78e052bb0099491"
-    },
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-      "filename": "noirlab-optical/atlases/y.webp",
-      "bytes": 350264,
-      "sha256": "5cee049f4e20d2f815541b2b033fa89b5aa018db804983b4f2a2a614c6d90ecf"
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-      "location": "prepared",
-      "filename": "noirlab-optical/atlases/z.webp",
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-      "sha256": "ae6d655f4c76508ff83d81015b1b848647e0597227c975d563f0c517625ca479"
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diff --git a/src/objects/m45/object.json b/src/objects/m45/object.json
index c9e53cab961..2957d12e092 100644
--- a/src/objects/m45/object.json
+++ b/src/objects/m45/object.json
@@ -1,42 +1,103 @@
 {
   "schema": "cssearth-object@2",
   "id": "m45",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Pleiades",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 109203529398159.4
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Pleiades",
+      "systemName": "Milky Way",
+      "classification": "nebula",
+      "color": "#9a9a9a",
+      "distanceAu": 28093266.61,
+      "description": "The Pleiades is an open star cluster surrounded by reflection nebulosity.",
+      "aliases": [
+        "M45",
+        "Seven Sisters",
+        "Pleiades reflection nebula"
+      ],
+      "order": 5144,
+      "context": {},
+      "distanceSubject": {
+        "id": "m45-stellar-cluster",
+        "name": "Pleiades stellar cluster",
+        "relationship": "Associated illuminating stellar cluster",
+        "reason": "The stellar-cluster distance locates the reflection-nebula scene; individual dust-filament distances are not measured."
+      }
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
-        2119510582205373200,
-        3194281146813442000,
-        1726240478294435000
+        2103179275207847000,
+        3207881506511226400,
+        1717207646325540600
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-        0.15558031632998595,
-        0.521053271530124,
-        0.8041433741265512,
-        0.2401076576179564
+      "presentationToReference": [
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+        0,
+        0.8650353054478543,
+        0.793654375804942,
+        0.3977771559319137,
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-      }
-    },
-    "preparation": {
-      "source": "source/delivery.json"
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 352269449671481.94,
+      "bodyRadiusM": 109203529398159410
     }
   },
   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m45/source/content/object.json b/src/objects/m45/source/content/object.json
new file mode 100644
index 00000000000..2b59fd97764
--- /dev/null
+++ b/src/objects/m45/source/content/object.json
@@ -0,0 +1,127 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m45",
+  "displayName": "Pleiades",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "136.2 pc (\u22121.2 / +1.2 pc)",
+        "source": {
+          "catalogueId": "melis-2014",
+          "url": "https://arxiv.org/pdf/1408.6544",
+          "label": "Melis et al. (2014), A VLBI Resolution of the Pleiades Distance Controversy",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "optical-composite",
+    "controls": [
+      {
+        "id": "optical-composite",
+        "label": "Optical composite \u00b7 NOIRLab + Niittee",
+        "thumbnail": "m45-dataset-optical-composite.webp",
+        "volume": {
+          "objectId": "m45-volume",
+          "datasetId": "optical-composite",
+          "surface": "optical-composite"
+        },
+        "source": {
+          "id": "m45-volume-niittee-widefield",
+          "path": "../../m45-volume/source/manifest.json",
+          "url": "https://commons.wikimedia.org/wiki/File:Plejades.jpg"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "noirlab-optical",
+        "label": "NOIRLab \u00b7 optical B / V / I",
+        "thumbnail": "m45-dataset-noirlab-optical.webp",
+        "volume": {
+          "objectId": "m45-volume",
+          "datasetId": "noirlab-optical",
+          "surface": "noirlab-optical"
+        },
+        "source": {
+          "id": "m45-volume-noirlab-optical",
+          "path": "../../m45-volume/source/manifest.json",
+          "url": "https://noirlab.edu/public/images/noao-m45/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "spitzer-irac",
+        "label": "Spitzer \u00b7 IRAC 3.6\u20138 \u00b5m",
+        "thumbnail": "m45-dataset-spitzer-irac.webp",
+        "volume": {
+          "objectId": "m45-volume",
+          "datasetId": "spitzer-irac",
+          "surface": "spitzer-irac"
+        },
+        "source": {
+          "id": "m45-volume-spitzer-irac",
+          "path": "../../m45-volume/source/manifest.json",
+          "url": "https://science.nasa.gov/photojournal/pink-pleiades/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "spitzer-irac-mips",
+        "label": "Spitzer \u00b7 IRAC + MIPS 4.5\u201324 \u00b5m",
+        "thumbnail": "m45-dataset-spitzer-irac-mips.webp",
+        "volume": {
+          "objectId": "m45-volume",
+          "datasetId": "spitzer-irac-mips",
+          "surface": "spitzer-irac-mips"
+        },
+        "source": {
+          "id": "m45-volume-spitzer-irac-mips",
+          "path": "../../m45-volume/source/manifest.json",
+          "url": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "wise-four-band",
+        "label": "WISE \u00b7 3.4\u201322 \u00b5m wide field",
+        "thumbnail": "m45-dataset-wise-four-band.webp",
+        "volume": {
+          "objectId": "m45-volume",
+          "datasetId": "wise-four-band",
+          "surface": "wise-four-band"
+        },
+        "source": {
+          "id": "m45-volume-wise-four-band",
+          "path": "../../m45-volume/source/manifest.json",
+          "url": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Melis et al. (2014), A VLBI Resolution of the Pleiades Distance Controversy",
+      "href": "https://arxiv.org/pdf/1408.6544"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://arxiv.org/pdf/1408.6544",
+      "credit": "Melis et al. (2014), A VLBI Resolution of the Pleiades Distance Controversy"
+    }
+  }
+}
diff --git a/src/objects/m45/source/manifest.json b/src/objects/m45/source/manifest.json
index 10224a7e5dc..63cbfe413af 100644
--- a/src/objects/m45/source/manifest.json
+++ b/src/objects/m45/source/manifest.json
@@ -1,402 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
-    {
-      "id": "noirlab-optical",
-      "path": ".local/nebula-lab/observations/m45-processing/sources/noirlab-optical.tif",
-      "origin": "https://noirlab.edu/public/images/noao-m45/",
-      "sourceUrl": "https://noirlab.edu/public/images/noao-m45/",
-      "title": "Pleiades · NOIRLab · optical B / V / I",
-      "credit": "NOIRLab/NSF/AURA/T.A. Rector (University of Alaska Anchorage), R. Cool (University of Arizona) and WIYN",
-      "displayCredit": "NOIRLab/NSF/AURA/T.A. Rector (University of Alaska Anchorage), R. Cool (University of Arizona) and WIYN",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "noirlab-noao-m45",
-            "role": "material",
-            "evidence": "labs/nebula/models/m45/processing-observations.json#/images/0"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "noirlab-optical",
-      "license": "Provider terms: https://noirlab.edu/public/about/image-usage/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "wiyn-0-9m",
-            "evidence": "https://noirlab.edu/public/images/noao-m45/ — NOIRLab-curated mirror https://www.astropix.org/image/noirlab/noao-m45 identifies Mosaic on the WIYN 0.9-metre telescope"
-          }
-        ],
-        "observation": {
-          "id": "noao-m45",
-          "target": "Pleiades",
-          "observedAt": null,
-          "instrument": null,
-          "bands": "Optical B 436 nm / V 537 nm / I 805 nm",
-          "evidence": "labs/nebula/models/m45/processing-observations.json#/images/0; exposure date and instrument are not specified in that pinned record."
-        }
-      }
-    },
-    {
-      "id": "spitzer-irac",
-      "path": ".local/nebula-lab/observations/m45-processing/sources/spitzer-irac.tif",
-      "origin": "https://science.nasa.gov/photojournal/pink-pleiades/",
-      "sourceUrl": "https://science.nasa.gov/photojournal/pink-pleiades/",
-      "title": "Pleiades · Spitzer · IRAC 3.6–8 µm",
-      "credit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
-      "displayCredit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "nasa-pia09262",
-            "role": "material",
-            "evidence": "labs/nebula/models/m45/processing-observations.json#/images/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "spitzer-irac",
-      "license": "Provider terms: https://www.spitzer.caltech.edu/page/image-use-policy. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "spitzer",
-            "evidence": "https://science.nasa.gov/photojournal/pink-pleiades/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "spitzer-irac-mips",
-      "path": ".local/nebula-lab/observations/m45-processing/sources/spitzer-irac-mips.tif",
-      "origin": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/",
-      "sourceUrl": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/",
-      "title": "Pleiades · Spitzer · IRAC + MIPS 4.5–24 µm",
-      "credit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
-      "displayCredit": "NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "nasa-pia09263",
-            "role": "material",
-            "evidence": "labs/nebula/models/m45/processing-observations.json#/images/2"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "spitzer-irac-mips",
-      "license": "Provider terms: https://www.spitzer.caltech.edu/page/image-use-policy. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "spitzer",
-            "evidence": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "wise-four-band",
-      "path": ".local/nebula-lab/observations/m45-processing/sources/wise-four-band.tif",
-      "origin": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/",
-      "sourceUrl": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/",
-      "title": "Pleiades · WISE · 3.4–22 µm wide field",
-      "credit": "NASA/JPL-Caltech/UCLA",
-      "displayCredit": "NASA/JPL-Caltech/UCLA",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "nasa-pia13121",
-            "role": "material",
-            "evidence": "labs/nebula/models/m45/processing-observations.json#/images/3"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "wise-four-band",
-      "license": "Provider terms: https://www.jpl.nasa.gov/jpl-image-use-policy/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "wise",
-            "evidence": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/"
-          }
-        ]
-      }
-    },
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "niittee-widefield",
-      "path": ".local/nebula-lab/observations/m45-optical-composite/sources/niittee-widefield.tif",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://commons.wikimedia.org/wiki/File:Plejades.jpg",
-      "sourceUrl": "https://commons.wikimedia.org/wiki/File:Plejades.jpg",
-      "title": "Pleiades · Tõrva / Niittee · wide optical",
-      "credit": "Taavi Niittee / Tõrva Astronomy Club",
-      "displayCredit": "Taavi Niittee / Tõrva Astronomy Club",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "niittee-plejades",
-            "role": "material",
-            "evidence": "labs/nebula/models/m45/optical-composite-observations.json#/images/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "optical-composite",
+      "credit": "Taavi Niittee / T\u00f5rva Astronomy Club; the default dataset's picture as the Pleiades bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "Provider terms: https://creativecommons.org/licenses/by/4.0/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "niittee-sharpstar-61edph-iii",
-            "evidence": "https://commons.wikimedia.org/wiki/File:Plejades.jpg — author’s Equipment Used: Sharpstar 61EDPH III, ZWO ASI071MC Pro; Tõrva, Estonia"
-          }
-        ]
-      }
-    },
-    {
-      "id": "physical-evidence",
-      "path": "src/objects/m45/source/bake-inputs/references/04-physical-evidence.json",
-      "origin": "https://doi.org/10.1086/374590",
-      "sourceUrl": "https://doi.org/10.1086/374590",
-      "title": "Pleiades physical evidence and authored limits",
-      "credit": "Published structural studies; authored display assumptions",
-      "acquisition": "Checked-in evidence ledger. This pin identifies the metadata record; cited publications and native scientific arrays retain their own identities. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "gibson-nordsieck-2003-ii",
-            "role": "method",
-            "evidence": "src/objects/m45/source/bake-inputs/references/04-physical-evidence.json#/sources/1"
-          },
-          {
-            "catalogueId": "ritchey-2006",
-            "role": "method",
-            "evidence": "src/objects/m45/source/bake-inputs/references/04-physical-evidence.json#/sources/5"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "observed-stars",
-      "path": "src/objects/m45/source/bake-inputs/references/06-stellar-catalogue.json",
-      "origin": "https://cdsarc.cds.unistra.fr/viz-bin/cat/I/239",
-      "sourceUrl": "https://cdsarc.cds.unistra.fr/viz-bin/cat/I/239",
-      "title": "Pleiades field stars · Hipparcos and Tycho-2",
-      "credit": "ESA (1997); Høg et al. (2000); CDS/VizieR",
-      "acquisition": "Checked-in normalized stellar catalogue from the two pinned CDS cone queries, preserving native astrometry and photometry. Johnson transformations and display-star selection are documented in the stellar source receipt. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "hipparcos-esa-1997",
-            "role": "material",
-            "evidence": "labs/nebula/models/m45/stellar-sources.json#/sources/0"
-          },
-          {
-            "catalogueId": "tycho2-hog-2000",
-            "role": "material",
-            "evidence": "labs/nebula/models/m45/stellar-sources.json#/sources/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "hipparcos",
-            "evidence": "https://www.esa.int/Science_Exploration/Space_Science/Hipparcos_overview — main instrument and star mapper produced Hipparcos and Tycho; stellar-sources.json pins both catalogue extracts. Tycho-2 proper motions also combine historical catalogues."
-          }
-        ]
-      }
-    },
-    {
-      "id": "distance",
-      "path": "src/objects/m45/source/delivery.json",
-      "origin": "https://arxiv.org/pdf/1408.6544",
-      "sourceUrl": "https://arxiv.org/pdf/1408.6544",
-      "title": "Pleiades adopted world placement",
-      "credit": "Melis et al. (2014), A VLBI Resolution of the Pleiades Distance Controversy",
-      "acquisition": "Checked-in delivery record. The pin identifies our placement metadata, not downloaded paper bytes; the adopted value and uncertainty are explained in the body README.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "melis-2014",
-            "role": "reference",
-            "evidence": "src/objects/m45/source/delivery.json#/sky/distancePc"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "stellar-field",
-      "path": "src/objects/m45/source/stellar-field.json",
-      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "title": "Pleiades surrounding Gaia DR3 stellar field",
-      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
-      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
-      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "gaia-dr3-gavo",
-            "role": "material",
-            "evidence": "src/objects/m45/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "bailer-jones-2021-distances",
-            "role": "method",
-            "evidence": "src/objects/m45/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "cardiel-2021-rgb",
-            "role": "method",
-            "evidence": "src/objects/m45/source/stellar-field.json#/provenance"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "gaia",
-            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m45-volume/source/manifest.json)."
       }
     }
   ],
   "documents": [
     {
-      "id": "document-1",
-      "path": "src/objects/m45/source/delivery.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "document-2",
-      "path": "src/objects/m45/source/nebula.json",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "document-3",
-      "path": "src/objects/m45/source/presentation.json",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "document-4",
-      "path": "src/objects/m45/source/request.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "retained-evidence-5",
-      "path": "src/objects/m45/source/bake-inputs/references/01-compiler.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-6",
-      "path": "src/objects/m45/source/bake-inputs/references/02-depth-model.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-7",
-      "path": "src/objects/m45/source/bake-inputs/references/03-observation-structures.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-8",
-      "path": "src/objects/m45/source/bake-inputs/references/05-processing-observations.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-9",
-      "path": "src/objects/m45/source/bake-inputs/references/07-optical-composite-observations.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-10",
-      "path": "src/objects/m45/source/bake-inputs/references/08-optical-composite.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-11",
-      "path": "src/objects/m45/source/provenance-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-12",
-      "path": "src/objects/m45/source/replay-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
-      }
-    }
-  ],
-  "generatedIntermediates": [
-    {
-      "id": "compact-bake-inputs-json-gz",
-      "path": "src/objects/m45/source/bake-inputs.json.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
+      "path": "preparation/navigation.json"
     }
   ]
 }
diff --git a/src/objects/m45/source/preparation/navigation.json b/src/objects/m45/source/preparation/navigation.json
new file mode 100644
index 00000000000..e23888f6a37
--- /dev/null
+++ b/src/objects/m45/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m45",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m45/source/presentation/context.png b/src/objects/m45/source/presentation/context.png
new file mode 100644
index 00000000000..4880a543a2d
Binary files /dev/null and b/src/objects/m45/source/presentation/context.png differ
diff --git a/src/objects/m45/source/presentation/solar-system.json b/src/objects/m45/source/presentation/solar-system.json
new file mode 100644
index 00000000000..0cb1aeeb00d
--- /dev/null
+++ b/src/objects/m45/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m45",
+  "displayName": "Pleiades",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 109203529398159.4,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m45/text.json b/src/objects/m45/text.json
new file mode 100644
index 00000000000..3aa90c6e604
--- /dev/null
+++ b/src/objects/m45/text.json
@@ -0,0 +1,100 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m45",
+  "card": {
+    "text": "The Pleiades is an open star cluster surrounded by reflection nebulosity.",
+    "sources": [
+      {
+        "catalogueId": "melis-2014",
+        "url": "https://arxiv.org/pdf/1408.6544",
+        "label": "Melis et al. (2014), A VLBI Resolution of the Pleiades Distance Controversy",
+        "checked": "2026-10-01",
+        "locator": "distance: 136.2 pc (−1.2 / +1.2 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "The Pleiades is an open star cluster surrounded by reflection nebulosity. Its stars lie about 136 parsecs away; the dust may not.",
+    "sources": [
+      {
+        "catalogueId": "melis-2014",
+        "url": "https://arxiv.org/pdf/1408.6544",
+        "label": "Melis et al. (2014), A VLBI Resolution of the Pleiades Distance Controversy",
+        "checked": "2026-10-01",
+        "locator": "distance: 136.2 pc (−1.2 / +1.2 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "optical-composite": {
+      "title": "Pleiades optical cloud, wider field",
+      "detail": "8000 × 5199 px",
+      "summary": "Wide optical photograph with central detail from NOIRLab; cloud depth is inferred and fine filaments are softened.",
+      "sources": [
+        {
+          "catalogueId": "niittee-plejades",
+          "url": "https://commons.wikimedia.org/wiki/File:Plejades.jpg",
+          "label": "Pleiades · Tõrva / Niittee · wide optical; Taavi Niittee / Tõrva Astronomy Club",
+          "checked": "2026-10-01",
+          "locator": "Pleiades · Tõrva / Niittee · wide optical"
+        }
+      ]
+    },
+    "noirlab-optical": {
+      "title": "Pleiades filaments in visible light",
+      "detail": "4000 × 2920 px",
+      "summary": "Optical B/V/I display on an inferred reflection cloud; this image covers only the central region.",
+      "sources": [
+        {
+          "catalogueId": "noirlab-noao-m45",
+          "url": "https://noirlab.edu/public/images/noao-m45/",
+          "label": "Pleiades · NOIRLab · optical B / V / I; NOIRLab/NSF/AURA/T.A. Rector (University of Alaska Anchorage), R. Cool (University of Arizona) and WIYN",
+          "checked": "2026-10-01",
+          "locator": "Pleiades · NOIRLab · optical B / V / I"
+        }
+      ]
+    },
+    "spitzer-irac": {
+      "title": "Pleiades dust in the Spitzer IRAC bands",
+      "detail": "2855 × 2855 px",
+      "summary": "IRAC infrared false color on an inferred cloud; the image covers only its central region.",
+      "sources": [
+        {
+          "catalogueId": "nasa-pia09262",
+          "url": "https://science.nasa.gov/photojournal/pink-pleiades/",
+          "label": "Pleiades · Spitzer · IRAC 3.6–8 µm; NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
+          "checked": "2026-10-01",
+          "locator": "Pleiades · Spitzer · IRAC 3.6–8 µm"
+        }
+      ]
+    },
+    "spitzer-irac-mips": {
+      "title": "Pleiades warm dust to 24 micrometres",
+      "detail": "2855 × 2855 px",
+      "summary": "IRAC/MIPS infrared false color on an inferred cloud; the image covers only its central region.",
+      "sources": [
+        {
+          "catalogueId": "nasa-pia09263",
+          "url": "https://science.nasa.gov/photojournal/the-seven-sisters-pose-for-spitzer/",
+          "label": "Pleiades · Spitzer · IRAC + MIPS 4.5–24 µm; NASA/JPL-Caltech/J. Stauffer (SSC-Caltech)",
+          "checked": "2026-10-01",
+          "locator": "Pleiades · Spitzer · IRAC + MIPS 4.5–24 µm"
+        }
+      ]
+    },
+    "wise-four-band": {
+      "title": "The wider Pleiades infrared cloud",
+      "detail": "4007 × 3061 px",
+      "summary": "WISE infrared false color on an inferred reflection cloud; dust depth and scattering are not recovered.",
+      "sources": [
+        {
+          "catalogueId": "nasa-pia13121",
+          "url": "https://science.nasa.gov/photojournal/seven-sisters-get-wise/",
+          "label": "Pleiades · WISE · 3.4–22 µm wide field; NASA/JPL-Caltech/UCLA",
+          "checked": "2026-10-01",
+          "locator": "Pleiades · WISE · 3.4–22 µm wide field"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m8-volume/README.md b/src/objects/m8-volume/README.md
new file mode 100644
index 00000000000..1f0826f6d2d
--- /dev/null
+++ b/src/objects/m8-volume/README.md
@@ -0,0 +1,44 @@
+# Lagoon Nebula (M8)
+
+Three datasets color one authored cloud front; **ESO optical is the default**. Local published structure guides its interpretation, but gas depth, extinction and overlapping molecular clouds are not reconstructed.
+
+## Sources
+
+| Source / dataset | Selected image and coverage |
+| --- | --- |
+| [ESO optical, eso0936a](https://www.eso.org/public/images/eso0936a/) | Hα/R/V/B display; 4000 × 2679 pixels, 93.49′ × 62.61′. |
+| [ESO VISTA, eso1101d](https://www.eso.org/public/images/eso1101d/) | J/H/Ks display; 4000 × 2202 pixels, 71.81′ × 39.54′. The publisher’s Hα metadata label conflicts with its near-IR caption. |
+| [Spitzer IRAC maps, CDS HiPS](../../sources/cds-hips-spitzer-irac.json) | IRAC 8.0/4.5/3.6 µm in MJy/sr from CDS hips2fits, [composed](source/sky-bands/spitzer-irac.json) on a 1757 × 1417 pixel, 35.73′ × 28.81′ TAN grid. Each band is scaled to its own measured range, so hue shows where a band is bright, not physical band ratios. MIPS 24 µm is left out: its map has no data over the Hourglass core. |
+
+The Spitzer dataset used the publisher's sig11-012 TIFF until the FITS composite replaced it; preview comparison (publisher left, FITS right). The composite registers against ESO optical with 214 matched stars, 0.12 px held-out RMS (the publisher TIFF: 199 stars).
+
+The ESO publication TIFFs preserve the full master footprints at reduced sampling. Pixel spacing is not measured PSF resolution. Different bands, stretches and masks cannot be interpreted as interchangeable calibrated flux.
+
+The adopted **1326 −69/+77 pc** cluster distance follows [Wright et al. (2019), §3.4](https://doi.org/10.1093/mnras/stz870), including its systematic uncertainty treatment; it is not a measured gas depth. The [stellar field](source/stellar-field.json) supplies 226 Gaia sources within an authored 60 pc sphere, G < 12, with Bailer-Jones distance estimates and uncertainty intervals shared across datasets.
+
+Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
+
+## Evidence
+
+- Final Helix/Lagoon app inspection records front/oblique views of all three Lagoon datasets after the edge correction. The earlier field report predates that correction; report context states reproduction gaps.
+- The final app report identifies cloud result `7545a7a3af30…` and predates the FITS Spitzer dataset. The current result `37a8918fb195…` replays byte for byte from the compact inputs; its app inspection records front, oblique and side captures of all three datasets (views), not a comparison with the earlier bank; the [object descriptor](object.json) pins its installed bank. The [edge-taper evidence](../../../labs/nebula/models/m8/edge-taper-evidence.json) measures source-target preservation, not screen brightness: 99.917% of bright-core target retained with 3.819% of the previous outermost-strip signal.
+- [Historical processing evidence](../../../labs/nebula/models/m8/processing-evidence.json) covers relative registration and native separation. No fresh cold replay or scientific/material acceptance is asserted.
+
+## Known problems
+
+- Fine filaments soften; residual stellar halos, thin layers and oblique grid traces remain. The wider optical taper and 240″ infrared edge fade soften boundaries without creating missing observations.
+- Neutral transitions remain where infrared coverage ends. Foreground absorption, distinct molecular layers and local diagnostic data are not fitted.
+- Hubble central images failed registration qualification; Herschel’s central zero/nonfinite coverage cannot constrain the Lagoon. Neither is a delivered dataset.
+
+<details>
+<summary>Methods and historical comparisons</summary>
+
+The [fixed lab account](../../../labs/nebula/models/m8/README.md), [physical evidence](../../../labs/nebula/models/m8/physical-evidence.json) and [source dossier](../../../labs/nebula/models/m8/source-dossier.json) preserve the Arias/Tiwari local interpretations, historical result identities and Hubble attempts with 0 and 9 matches against a 45-match gate. The papers’ 1250 pc local footprint conversion stays distinct from the adopted application distance. Use the [shared nebula guide](../../../docs/nebulae/README.md) for preparation.
+
+</details>
+
+## Compact delivery inputs
+
+The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
+
+Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
diff --git a/src/objects/m8-volume/inventory.json b/src/objects/m8-volume/inventory.json
new file mode 100644
index 00000000000..61ae5f6f0c1
--- /dev/null
+++ b/src/objects/m8-volume/inventory.json
@@ -0,0 +1,569 @@
+{
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+  "assets": [
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diff --git a/src/objects/m8/investigations.json b/src/objects/m8-volume/investigations.json
similarity index 96%
rename from src/objects/m8/investigations.json
rename to src/objects/m8-volume/investigations.json
index 0cd66c5adbe..1ff5cb3cf25 100644
--- a/src/objects/m8/investigations.json
+++ b/src/objects/m8-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "m8",
+  "objectId": "m8-volume",
   "entries": [
     {
       "id": "dataset-eso-optical",
@@ -8,7 +8,7 @@
       "status": "included",
       "finding": "Default H-alpha/R/V/B publication TIFF preserves the full 93.49 by 62.61 arcmin footprint at 4000 by 2679 pixels. Registration and native separation qualify processing; the 450 arcsec optical support taper is authored and does not infer a physical boundary.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/processing-observations.json"
       ]
@@ -19,7 +19,7 @@
       "status": "included",
       "finding": "J/H/Ks publication TIFF, 4000 by 2202 pixels, 71.81 by 39.54 arcmin. The caption identifies near-IR bands despite an H-alpha metadata mislabel. Its current 240 arcsec source-edge fade softens missing coverage without adding gas.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/processing-observations.json"
       ]
@@ -30,7 +30,7 @@
       "status": "included",
       "finding": "Calibrated IRAC 8.0/4.5/3.6 micrometre maps from CDS hips2fits, composed on the 1757 by 1417 pixel, 35.73 by 28.81 arcmin TAN grid with one measured background and range per band and one asinh display. Registered against ESO optical with 214 matched stars and 0.118 px held-out RMS. MIPS 24 micrometres is left out because its HiPS has no data over the Hourglass core; hue shows band-relative brightness, not physical ratios.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8/source/sky-bands/spitzer-irac.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8-volume/source/sky-bands/spitzer-irac.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/processing-observations.json"
       ]
     },
@@ -41,7 +41,7 @@
       "finding": "Replaced by the calibrated IRAC composite. Its earlier use: IRAC 3.6/4.5/5.8/8 plus MIPS 24 micrometre false color, 1757 by 1417 pixels over 35.73 by 28.81 arcmin. AstroPix supplies the matching WCS; different beams and the narrow footprint remain explicit, with a 240 arcsec source-edge fade.",
       "revisitWhen": "A calibrated MIPS 24 micrometre map with coverage over the Hourglass core, or evidence that the IRAC composite misplaces or loses structure the publisher image shows.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8/source/presentation.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8-volume/source/presentation.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/compiler.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/processing-observations.json"
       ]
@@ -52,8 +52,8 @@
       "status": "included",
       "finding": "226 Gaia sources in an authored 60 pc sphere, G < 12, shared across the three datasets; the sparse brightness selection is intentional and not filled with artificial stars. Actual catalogue source IDs, median distances and uncertainty intervals are retained. Sphere, quality cuts, budget, brightness response and fade are display selections, not a membership survey; Cardiel BP-RP display color uses a neutral fallback outside its valid range.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8/source/stellar-field.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8/source/delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8-volume/source/stellar-field.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8-volume/source/delivery.json",
         "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
         "https://arxiv.org/abs/2012.05220",
         "https://arxiv.org/abs/2107.08734"
@@ -65,7 +65,7 @@
       "status": "included",
       "finding": "The application adopts 1326 -69/+77 pc from the cluster analysis, including its systematic treatment. Anisotropic stellar expansion does not justify a spherical gas-expansion law or membership for every field star.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8/source/nebula.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8-volume/source/nebula.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/physical-evidence.json",
         "https://doi.org/10.1093/mnras/stz870"
       ]
@@ -146,7 +146,7 @@
       "evidence": [
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/edge-taper-evidence.json",
         "https://github.com/layoutit/css.earth/blob/main/labs/nebula/models/m8/optical-window-evidence.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8/source/delivery.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/m8-volume/source/delivery.json"
       ]
     },
     {
diff --git a/src/objects/m8-volume/object.json b/src/objects/m8-volume/object.json
new file mode 100644
index 00000000000..9501090b76b
--- /dev/null
+++ b/src/objects/m8-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "m8-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        516077129585567100,
+        -37305840564853540000,
+        -16843028683624583000
+      ],
+      "localToReferenceXyzw": [
+        0.8401043005513,
+        0.005610842661921013,
+        0.003622443103695396,
+        0.5423837760716987
+      ],
+      "metersPerUnit": 198366776548200,
+      "boundsUnits": {
+        "min": [
+          -3954.981314224592,
+          -2672.51843533766,
+          -1722.1029829216286
+        ],
+        "max": [
+          3954.981314224592,
+          2672.51843533766,
+          1722.1029829216286
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/delivery.json"
+    },
+    "host": "m8"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/m8/source/bake-inputs.json.gz b/src/objects/m8-volume/source/bake-inputs.json.gz
similarity index 100%
rename from src/objects/m8/source/bake-inputs.json.gz
rename to src/objects/m8-volume/source/bake-inputs.json.gz
diff --git a/src/objects/m8/source/bake-inputs/references/01-compiler.json b/src/objects/m8-volume/source/bake-inputs/references/01-compiler.json
similarity index 71%
rename from src/objects/m8/source/bake-inputs/references/01-compiler.json
rename to src/objects/m8-volume/source/bake-inputs/references/01-compiler.json
index 76aeffc4769..1e6a04fd618 100644
--- a/src/objects/m8/source/bake-inputs/references/01-compiler.json
+++ b/src/objects/m8-volume/source/bake-inputs/references/01-compiler.json
@@ -1,16 +1,22 @@
 {
   "schema": "cssearth-nebula-compiler@1",
-  "id": "m8",
+  "id": "m8-volume",
   "label": "Lagoon · M8",
   "observationRecipe": "labs/nebula/models/m8/processing-observations.json",
   "observationCatalogue": ".local/nebula-lab/observations/m8-processed/observations.json",
   "structureRecipe": "labs/nebula/models/m8/processing-structures.json",
   "structureCatalogue": ".local/nebula-lab/observations/m8-processed/structures/catalogue.json",
   "defaultSourceId": "eso-optical",
-  "emissionWindow": { "sourceId": "eso-optical", "featherArcsec": 450 },
+  "emissionWindow": {
+    "sourceId": "eso-optical",
+    "featherArcsec": 450
+  },
   "maximumStars": 650,
   "starCatalogue": {
-    "sourceIds": ["eso-optical", "eso-vista"],
+    "sourceIds": [
+      "eso-optical",
+      "eso-vista"
+    ],
     "mergeRadiusArcsec": 3
   },
   "interpretation": "Relative display emission on one authored coherent front, with locally paper-guided topology. Foreground extinction, separate molecular clouds and unknown front/back distances are not reconstructed. Shared RGB datasets and image-detected compact lights retain one geometry; no gas velocity is converted to depth.",
@@ -27,9 +33,18 @@
   },
   "targetControls": {
     "sources": {
-      "eso-optical": { "backgroundSpread": 1.5, "edgeTaperArcsec": 450 },
-      "eso-vista": { "backgroundSpread": 1.5, "edgeTaperArcsec": 240 },
-      "spitzer-mid-infrared": { "backgroundSpread": 1.5, "edgeTaperArcsec": 240 }
+      "eso-optical": {
+        "backgroundSpread": 1.5,
+        "edgeTaperArcsec": 450
+      },
+      "eso-vista": {
+        "backgroundSpread": 1.5,
+        "edgeTaperArcsec": 240
+      },
+      "spitzer-mid-infrared": {
+        "backgroundSpread": 1.5,
+        "edgeTaperArcsec": 240
+      }
     }
   }
 }
diff --git a/src/objects/m8/source/bake-inputs/references/02-depth-model.json b/src/objects/m8-volume/source/bake-inputs/references/02-depth-model.json
similarity index 98%
rename from src/objects/m8/source/bake-inputs/references/02-depth-model.json
rename to src/objects/m8-volume/source/bake-inputs/references/02-depth-model.json
index 3c5d5480bcd..d83c7f59d9e 100644
--- a/src/objects/m8/source/bake-inputs/references/02-depth-model.json
+++ b/src/objects/m8-volume/source/bake-inputs/references/02-depth-model.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-depth-model@1",
-  "id": "m8",
+  "id": "m8-volume",
   "centerIcrsDegrees": [
     270.76531645904527,
     -24.30622861770443
@@ -32,8 +32,8 @@
     ],
     "curvaturePerArcsec": [
       0.0001,
-      0.000025,
-      -0.00006
+      2.5e-05,
+      -6e-05
     ],
     "thicknessArcsec": 160,
     "strength": 1,
diff --git a/src/objects/m8/source/bake-inputs/references/03-physical-evidence.json b/src/objects/m8-volume/source/bake-inputs/references/03-physical-evidence.json
similarity index 100%
rename from src/objects/m8/source/bake-inputs/references/03-physical-evidence.json
rename to src/objects/m8-volume/source/bake-inputs/references/03-physical-evidence.json
diff --git a/src/objects/m8/source/bake-inputs/references/04-processing-observations.json b/src/objects/m8-volume/source/bake-inputs/references/04-processing-observations.json
similarity index 98%
rename from src/objects/m8/source/bake-inputs/references/04-processing-observations.json
rename to src/objects/m8-volume/source/bake-inputs/references/04-processing-observations.json
index a04cd483a9a..364ffeb1447 100644
--- a/src/objects/m8/source/bake-inputs/references/04-processing-observations.json
+++ b/src/objects/m8-volume/source/bake-inputs/references/04-processing-observations.json
@@ -156,7 +156,7 @@
       "credit": "NASA/JPL-Caltech; HiPS: CDS (CNRS/Unistra)",
       "termsUrl": "https://www.spitzer.caltech.edu/page/image-use-policy",
       "skyBands": {
-        "path": "src/objects/m8/source/sky-bands/spitzer-irac.json"
+        "path": "src/objects/m8-volume/source/sky-bands/spitzer-irac.json"
       },
       "metadataNote": "Composed from pinned CDS hips2fits IRAC maps in MJy/sr, calibrated with IRAC Handbook surface-brightness factors, one measured background and range per band, then one Lupton asinh display. WCS is the recipe grid. MIPS 24 µm is omitted: its HiPS has no data over the Hourglass core."
     }
diff --git a/src/objects/m8/source/bake-inputs/references/05-processing-structures.json b/src/objects/m8-volume/source/bake-inputs/references/05-processing-structures.json
similarity index 100%
rename from src/objects/m8/source/bake-inputs/references/05-processing-structures.json
rename to src/objects/m8-volume/source/bake-inputs/references/05-processing-structures.json
diff --git a/src/objects/m8/source/delivery.json b/src/objects/m8-volume/source/delivery.json
similarity index 86%
rename from src/objects/m8/source/delivery.json
rename to src/objects/m8-volume/source/delivery.json
index 91a0b327ef1..44f77fde91a 100644
--- a/src/objects/m8/source/delivery.json
+++ b/src/objects/m8-volume/source/delivery.json
@@ -1,9 +1,9 @@
 {
   "schema": "cssearth-nebula-delivery@2",
-  "id": "m8",
+  "id": "m8-volume",
   "method": "compiler",
   "request": {
-    "path": "src/objects/m8/source/request.json"
+    "path": "src/objects/m8-volume/source/request.json"
   },
   "inputPins": [
     {
@@ -37,10 +37,10 @@
   "framingRadiusUnits": 3414.784262,
   "acceptedLabResult": "m8",
   "fieldStars": {
-    "path": "src/objects/m8/source/stellar-field.json"
+    "path": "src/objects/m8-volume/source/stellar-field.json"
   },
   "compactInputs": {
-    "path": "src/objects/m8/source/bake-inputs.json.gz"
+    "path": "src/objects/m8-volume/source/bake-inputs.json.gz"
   },
   "compactMethod": "compiler"
 }
diff --git a/src/objects/m8-volume/source/manifest.json b/src/objects/m8-volume/source/manifest.json
new file mode 100644
index 00000000000..6aa79d25786
--- /dev/null
+++ b/src/objects/m8-volume/source/manifest.json
@@ -0,0 +1,293 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "eso-optical",
+      "path": ".local/nebula-lab/observations/m8-processed/sources/eso-optical.tif",
+      "origin": "https://www.eso.org/public/images/eso0936a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso0936a/",
+      "title": "Lagoon Nebula · ESO · optical",
+      "credit": "ESO",
+      "displayCredit": "ESO",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso0936a",
+            "role": "material",
+            "evidence": "labs/nebula/models/m8/processing-observations.json#/images/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso-optical",
+      "license": "Provider terms: https://www.eso.org/public/outreach/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "mpg-eso-2-2m",
+            "evidence": "https://www.eso.org/public/images/eso0936a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "eso-vista",
+      "path": ".local/nebula-lab/observations/m8-processed/sources/eso-vista.tif",
+      "origin": "https://www.eso.org/public/images/eso1101d/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1101d/",
+      "title": "Lagoon Nebula · ESO VISTA · infrared",
+      "credit": "ESO/VVV. Acknowledgment: Cambridge Astronomical Survey Unit",
+      "displayCredit": "ESO/VVV. Acknowledgment: Cambridge Astronomical Survey Unit",
+      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1101d",
+            "role": "material",
+            "evidence": "labs/nebula/models/m8/processing-observations.json#/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso-vista",
+      "license": "Provider terms: https://www.eso.org/public/outreach/copyright/. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vista",
+            "evidence": "https://www.eso.org/public/images/eso1101d/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "spitzer-mid-infrared",
+      "path": ".local/nebula-lab/observations/m8-processed/sources/spitzer-mid-infrared.skybands.png",
+      "origin": "https://alasky.cds.unistra.fr/hips-image-services/hips2fits",
+      "sourceUrl": "https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/",
+      "title": "Lagoon Nebula · Spitzer IRAC · calibrated mid-infrared maps",
+      "credit": "NASA/JPL-Caltech; HiPS: CDS (CNRS/Unistra)",
+      "displayCredit": "NASA/JPL-Caltech; CDS",
+      "acquisition": "Composed by the pinned sky band recipe src/objects/m8-volume/source/sky-bands/spitzer-irac.json from three pinned CDS hips2fits IRAC 8.0/4.5/3.6 µm maps: calibrated to MJy/sr, one measured background and range per band, one Lupton asinh display. The repository-relative path is an ignored cache that the recipe reproduces byte for byte.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "cds-hips-spitzer-irac",
+            "role": "material",
+            "evidence": "src/objects/m8-volume/source/sky-bands/spitzer-irac.json#/bands"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "spitzer-mid-infrared",
+      "license": "Provider terms: https://www.spitzer.caltech.edu/page/image-use-policy; CDS HiPS distribution under ODbL-1.0. Retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "spitzer",
+            "evidence": "https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "physical-evidence",
+      "path": "src/objects/m8-volume/source/bake-inputs/references/03-physical-evidence.json",
+      "origin": "https://doi.org/10.1111/j.1365-2966.2005.09829.x",
+      "sourceUrl": "https://doi.org/10.1111/j.1365-2966.2005.09829.x",
+      "title": "Lagoon Nebula physical evidence and authored limits",
+      "credit": "Published structural studies; authored display assumptions",
+      "acquisition": "Checked-in evidence ledger. This pin identifies the metadata record; cited publications and native scientific arrays retain their own identities. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "arias-2006-hourglass",
+            "role": "method",
+            "evidence": "src/objects/m8-volume/source/bake-inputs/references/03-physical-evidence.json#/sources/0"
+          },
+          {
+            "catalogueId": "tiwari-2018-pdr",
+            "role": "method",
+            "evidence": "src/objects/m8-volume/source/bake-inputs/references/03-physical-evidence.json#/sources/5"
+          },
+          {
+            "catalogueId": "tiwari-2020-east",
+            "role": "method",
+            "evidence": "src/objects/m8-volume/source/bake-inputs/references/03-physical-evidence.json#/sources/6"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "distance",
+      "path": "src/objects/m8-volume/source/delivery.json",
+      "origin": "https://arxiv.org/pdf/1903.12176v1",
+      "sourceUrl": "https://arxiv.org/pdf/1903.12176v1",
+      "title": "Lagoon Nebula adopted world placement",
+      "credit": "Wright et al. (2019), The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2",
+      "acquisition": "Checked-in delivery record. The pin identifies our placement metadata, not downloaded paper bytes; the adopted value and uncertainty are explained in the body README.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "wright-2019-kinematics",
+            "role": "reference",
+            "evidence": "src/objects/m8-volume/source/delivery.json#/sky/distancePc"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "stellar-field",
+      "path": "src/objects/m8-volume/source/stellar-field.json",
+      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
+      "title": "Lagoon Nebula surrounding Gaia DR3 stellar field",
+      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
+      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
+      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "gaia-dr3-gavo",
+            "role": "material",
+            "evidence": "src/objects/m8-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "bailer-jones-2021-distances",
+            "role": "method",
+            "evidence": "src/objects/m8-volume/source/stellar-field.json#/provenance"
+          },
+          {
+            "catalogueId": "cardiel-2021-rgb",
+            "role": "method",
+            "evidence": "src/objects/m8-volume/source/stellar-field.json#/provenance"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "gaia",
+            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-1",
+      "path": "src/objects/m8-volume/source/delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/m8-volume/source/nebula.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-3",
+      "path": "src/objects/m8-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/m8-volume/source/request.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    },
+    {
+      "id": "retained-evidence-5",
+      "path": "src/objects/m8-volume/source/bake-inputs/references/01-compiler.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-6",
+      "path": "src/objects/m8-volume/source/bake-inputs/references/02-depth-model.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-7",
+      "path": "src/objects/m8-volume/source/bake-inputs/references/04-processing-observations.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-8",
+      "path": "src/objects/m8-volume/source/bake-inputs/references/05-processing-structures.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-9",
+      "path": "src/objects/m8-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "retained-evidence-10",
+      "path": "src/objects/m8-volume/source/replay-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
+      }
+    },
+    {
+      "id": "document-11",
+      "path": "src/objects/m8-volume/source/sky-bands/spitzer-irac.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+      }
+    }
+  ],
+  "generatedIntermediates": [
+    {
+      "id": "compact-bake-inputs-json-gz",
+      "path": "src/objects/m8-volume/source/bake-inputs.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    }
+  ]
+}
diff --git a/src/objects/m8/source/nebula.json b/src/objects/m8-volume/source/nebula.json
similarity index 98%
rename from src/objects/m8/source/nebula.json
rename to src/objects/m8-volume/source/nebula.json
index e7f049a6f23..8b38ee9bf86 100644
--- a/src/objects/m8/source/nebula.json
+++ b/src/objects/m8-volume/source/nebula.json
@@ -58,7 +58,7 @@
         "sourceRef": "m8-registered-frame"
       },
       "status": "confirmed",
-      "detailedObjectId": "m8"
+      "detailedObjectId": "m8-volume"
     }
   ]
 }
diff --git a/src/objects/m8/source/presentation.json b/src/objects/m8-volume/source/presentation.json
similarity index 86%
rename from src/objects/m8/source/presentation.json
rename to src/objects/m8-volume/source/presentation.json
index ad6cc741ef6..00fa3745dd1 100644
--- a/src/objects/m8/source/presentation.json
+++ b/src/objects/m8-volume/source/presentation.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m8",
+  "objectId": "m8-volume",
   "name": "Lagoon Nebula",
   "defaultDataset": "eso-optical",
   "sharedInputs": [
@@ -100,46 +100,46 @@
       "preview": {
         "path": ".local/nebula-lab/observations/m8-processed/sources/spitzer-mid-infrared.skybands.png",
         "skyBands": {
-          "path": "src/objects/m8/source/sky-bands/spitzer-irac.json"
+          "path": "src/objects/m8-volume/source/sky-bands/spitzer-irac.json"
         }
       }
     }
   ],
   "bank": {
-    "path": "src/objects/m8/prepared/datasets.json"
+    "path": "src/objects/m8-volume/prepared/datasets.json"
   },
   "recipes": [
     {
       "id": "recipe-1",
-      "path": "src/objects/m8/source/delivery.json"
+      "path": "src/objects/m8-volume/source/delivery.json"
     },
     {
       "id": "recipe-2",
-      "path": "src/objects/m8/source/request.json"
+      "path": "src/objects/m8-volume/source/request.json"
     },
     {
       "id": "recipe-3",
-      "path": "src/objects/m8/source/bake-inputs/references/01-compiler.json"
+      "path": "src/objects/m8-volume/source/bake-inputs/references/01-compiler.json"
     },
     {
       "id": "recipe-4",
-      "path": "src/objects/m8/source/bake-inputs/references/02-depth-model.json"
+      "path": "src/objects/m8-volume/source/bake-inputs/references/02-depth-model.json"
     },
     {
       "id": "recipe-5",
-      "path": "src/objects/m8/source/bake-inputs/references/03-physical-evidence.json"
+      "path": "src/objects/m8-volume/source/bake-inputs/references/03-physical-evidence.json"
     },
     {
       "id": "recipe-6",
-      "path": "src/objects/m8/source/bake-inputs/references/04-processing-observations.json"
+      "path": "src/objects/m8-volume/source/bake-inputs/references/04-processing-observations.json"
     },
     {
       "id": "recipe-7",
-      "path": "src/objects/m8/source/bake-inputs/references/05-processing-structures.json"
+      "path": "src/objects/m8-volume/source/bake-inputs/references/05-processing-structures.json"
     },
     {
       "id": "recipe-8",
-      "path": "src/objects/m8/source/sky-bands/spitzer-irac.json"
+      "path": "src/objects/m8-volume/source/sky-bands/spitzer-irac.json"
     }
   ]
 }
diff --git a/src/objects/m8/source/provenance-references.json b/src/objects/m8-volume/source/provenance-references.json
similarity index 55%
rename from src/objects/m8/source/provenance-references.json
rename to src/objects/m8-volume/source/provenance-references.json
index 48409eb6d9e..8d8da26707b 100644
--- a/src/objects/m8/source/provenance-references.json
+++ b/src/objects/m8-volume/source/provenance-references.json
@@ -3,27 +3,27 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/m8/physical-evidence.json",
-      "path": "src/objects/m8/source/bake-inputs/references/03-physical-evidence.json",
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-      "path": "src/objects/m8/source/bake-inputs/references/01-compiler.json",
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     {
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-      "path": "src/objects/m8/source/bake-inputs/references/02-depth-model.json",
+      "path": "src/objects/m8-volume/source/bake-inputs/references/02-depth-model.json",
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     {
       "originalPath": "labs/nebula/models/m8/processing-observations.json",
-      "path": "src/objects/m8/source/bake-inputs/references/04-processing-observations.json",
+      "path": "src/objects/m8-volume/source/bake-inputs/references/04-processing-observations.json",
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-      "path": "src/objects/m8/source/bake-inputs/references/05-processing-structures.json",
+      "path": "src/objects/m8-volume/source/bake-inputs/references/05-processing-structures.json",
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diff --git a/src/objects/m8/source/replay-references.json b/src/objects/m8-volume/source/replay-references.json
similarity index 100%
rename from src/objects/m8/source/replay-references.json
rename to src/objects/m8-volume/source/replay-references.json
diff --git a/src/objects/m8/source/request.json b/src/objects/m8-volume/source/request.json
similarity index 100%
rename from src/objects/m8/source/request.json
rename to src/objects/m8-volume/source/request.json
diff --git a/src/objects/m8/source/sky-bands/spitzer-irac.json b/src/objects/m8-volume/source/sky-bands/spitzer-irac.json
similarity index 100%
rename from src/objects/m8/source/sky-bands/spitzer-irac.json
rename to src/objects/m8-volume/source/sky-bands/spitzer-irac.json
diff --git a/src/objects/m8/source/stellar-field.json b/src/objects/m8-volume/source/stellar-field.json
similarity index 99%
rename from src/objects/m8/source/stellar-field.json
rename to src/objects/m8-volume/source/stellar-field.json
index 9b48297ebd9..a17e44ac18c 100644
--- a/src/objects/m8/source/stellar-field.json
+++ b/src/objects/m8-volume/source/stellar-field.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-gaia-nebula-field@1",
-  "id": "m8",
+  "id": "m8-volume",
   "coordinateEpochJulianYear": 2016,
   "selection": {
     "centerIcrsDegrees": [
diff --git a/src/objects/m8/README.md b/src/objects/m8/README.md
index 1f0826f6d2d..f87618a640a 100644
--- a/src/objects/m8/README.md
+++ b/src/objects/m8/README.md
@@ -1,44 +1,16 @@
-# Lagoon Nebula (M8)
+# Lagoon Nebula
 
-Three datasets color one authored cloud front; **ESO optical is the default**. Local published structure guides its interpretation, but gas depth, extinction and overlapping molecular clouds are not reconstructed.
+Lagoon Nebula as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Lagoon Nebula volume](../m8-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Source / dataset | Selected image and coverage |
-| --- | --- |
-| [ESO optical, eso0936a](https://www.eso.org/public/images/eso0936a/) | Hα/R/V/B display; 4000 × 2679 pixels, 93.49′ × 62.61′. |
-| [ESO VISTA, eso1101d](https://www.eso.org/public/images/eso1101d/) | J/H/Ks display; 4000 × 2202 pixels, 71.81′ × 39.54′. The publisher’s Hα metadata label conflicts with its near-IR caption. |
-| [Spitzer IRAC maps, CDS HiPS](../../sources/cds-hips-spitzer-irac.json) | IRAC 8.0/4.5/3.6 µm in MJy/sr from CDS hips2fits, [composed](source/sky-bands/spitzer-irac.json) on a 1757 × 1417 pixel, 35.73′ × 28.81′ TAN grid. Each band is scaled to its own measured range, so hue shows where a band is bright, not physical band ratios. MIPS 24 µm is left out: its map has no data over the Hourglass core. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m8.json) cites the position, distance and velocity that place it.
 
-The Spitzer dataset used the publisher's sig11-012 TIFF until the FITS composite replaced it; preview comparison (publisher left, FITS right). The composite registers against ESO optical with 214 matched stars, 0.12 px held-out RMS (the publisher TIFF: 199 stars).
+## Processing
 
-The ESO publication TIFFs preserve the full master footprints at reduced sampling. Pixel spacing is not measured PSF resolution. Different bands, stretches and masks cannot be interpreted as interchangeable calibrated flux.
-
-The adopted **1326 −69/+77 pc** cluster distance follows [Wright et al. (2019), §3.4](https://doi.org/10.1093/mnras/stz870), including its systematic uncertainty treatment; it is not a measured gas depth. The [stellar field](source/stellar-field.json) supplies 226 Gaia sources within an authored 60 pc sphere, G < 12, with Bailer-Jones distance estimates and uncertainty intervals shared across datasets.
-
-Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; “included” means used by this delivery, not scientifically validated.
-
-## Evidence
-
-- Final Helix/Lagoon app inspection records front/oblique views of all three Lagoon datasets after the edge correction. The earlier field report predates that correction; report context states reproduction gaps.
-- The final app report identifies cloud result `7545a7a3af30…` and predates the FITS Spitzer dataset. The current result `37a8918fb195…` replays byte for byte from the compact inputs; its app inspection records front, oblique and side captures of all three datasets (views), not a comparison with the earlier bank; the [object descriptor](object.json) pins its installed bank. The [edge-taper evidence](../../../labs/nebula/models/m8/edge-taper-evidence.json) measures source-target preservation, not screen brightness: 99.917% of bright-core target retained with 3.819% of the previous outermost-strip signal.
-- [Historical processing evidence](../../../labs/nebula/models/m8/processing-evidence.json) covers relative registration and native separation. No fresh cold replay or scientific/material acceptance is asserted.
+1. `pnpm prepare:objects --object=m8` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m8` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- Fine filaments soften; residual stellar halos, thin layers and oblique grid traces remain. The wider optical taper and 240″ infrared edge fade soften boundaries without creating missing observations.
-- Neutral transitions remain where infrared coverage ends. Foreground absorption, distinct molecular layers and local diagnostic data are not fitted.
-- Hubble central images failed registration qualification; Herschel’s central zero/nonfinite coverage cannot constrain the Lagoon. Neither is a delivered dataset.
-
-<details>
-<summary>Methods and historical comparisons</summary>
-
-The [fixed lab account](../../../labs/nebula/models/m8/README.md), [physical evidence](../../../labs/nebula/models/m8/physical-evidence.json) and [source dossier](../../../labs/nebula/models/m8/source-dossier.json) preserve the Arias/Tiwari local interpretations, historical result identities and Hubble attempts with 0 and 9 matches against a 45-match gate. The papers’ 1250 pc local footprint conversion stays distinct from the adopted application distance. Use the [shared nebula guide](../../../docs/nebulae/README.md) for preparation.
-
-</details>
-
-## Compact delivery inputs
-
-The source-owned compact input pin in [delivery.json](source/delivery.json) retains the accepted pre-slice model, material and integration data. Ordinary preparation regenerates the runtime WebP Q80/A80 XYZ atlases and distant impostors without native observation downloads, star extraction or model fitting. Runtime images remain generated and ignored. The [shared bake guide](../../../docs/nebulae/README.md#compact-inputs-and-research-replay) distinguishes this replay from optional full research processing. Source observations and the model limitations above still apply.
-
-Application provenance reads the object-owned evidence and recipe copies recorded in [provenance references](source/provenance-references.json). Their original revisions are preserved; nested research paths describe historical inputs and are not application file reads.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m8/inventory.json b/src/objects/m8/inventory.json
index a57a90abefb..fa7370905c4 100644
--- a/src/objects/m8/inventory.json
+++ b/src/objects/m8/inventory.json
@@ -3,567 +3,63 @@
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diff --git a/src/objects/m8/object.json b/src/objects/m8/object.json
index 359a665a4da..3e06e452602 100644
--- a/src/objects/m8/object.json
+++ b/src/objects/m8/object.json
@@ -1,42 +1,97 @@
 {
   "schema": "cssearth-object@2",
   "id": "m8",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Lagoon Nebula",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 677379746660464.1
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Lagoon Nebula",
+      "systemName": "Milky Way",
+      "classification": "nebula",
+      "color": "#9a9a9a",
+      "distanceAu": 273507133.1,
+      "description": "The Lagoon is a star-forming H II region about 1,326 parsecs away.",
+      "aliases": [
+        "M8",
+        "NGC 6523",
+        "Lagoon"
+      ],
+      "order": 5145,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
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-        -37305840564853540000,
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-        0.005610842661921013,
-        0.003622443103695396,
-        0.5423837760716987
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-      }
-    },
-    "preparation": {
-      "source": "source/delivery.json"
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
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+      "metersPerUnit": 2185095956969239,
+      "bodyRadiusM": 677379746660464100
     }
   },
   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m8/source/content/object.json b/src/objects/m8/source/content/object.json
new file mode 100644
index 00000000000..09c2b2bcbdb
--- /dev/null
+++ b/src/objects/m8/source/content/object.json
@@ -0,0 +1,95 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m8",
+  "displayName": "Lagoon Nebula",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "1.326 kpc (\u221269 / +77 pc)",
+        "source": {
+          "catalogueId": "wright-2019-kinematics",
+          "url": "https://arxiv.org/pdf/1903.12176v1",
+          "label": "Wright et al. (2019), The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "eso-optical",
+    "controls": [
+      {
+        "id": "eso-optical",
+        "label": "ESO \u00b7 optical",
+        "thumbnail": "m8-dataset-eso-optical.webp",
+        "volume": {
+          "objectId": "m8-volume",
+          "datasetId": "eso-optical",
+          "surface": "eso-optical"
+        },
+        "source": {
+          "id": "m8-volume-eso-optical",
+          "path": "../../m8-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso0936a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "eso-vista",
+        "label": "ESO VISTA \u00b7 infrared",
+        "thumbnail": "m8-dataset-eso-vista.webp",
+        "volume": {
+          "objectId": "m8-volume",
+          "datasetId": "eso-vista",
+          "surface": "eso-vista"
+        },
+        "source": {
+          "id": "m8-volume-eso-vista",
+          "path": "../../m8-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1101d/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "spitzer-mid-infrared",
+        "label": "Spitzer \u00b7 infrared",
+        "thumbnail": "m8-dataset-spitzer-mid-infrared.webp",
+        "volume": {
+          "objectId": "m8-volume",
+          "datasetId": "spitzer-mid-infrared",
+          "surface": "spitzer-mid-infrared"
+        },
+        "source": {
+          "id": "m8-volume-spitzer-mid-infrared",
+          "path": "../../m8-volume/source/manifest.json",
+          "url": "https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Wright et al. (2019), The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2",
+      "href": "https://arxiv.org/pdf/1903.12176v1"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://arxiv.org/pdf/1903.12176v1",
+      "credit": "Wright et al. (2019), The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2"
+    }
+  }
+}
diff --git a/src/objects/m8/source/manifest.json b/src/objects/m8/source/manifest.json
index b546db48da3..ccc5cf12903 100644
--- a/src/objects/m8/source/manifest.json
+++ b/src/objects/m8/source/manifest.json
@@ -1,293 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "eso-optical",
-      "path": ".local/nebula-lab/observations/m8-processed/sources/eso-optical.tif",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/eso0936a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso0936a/",
-      "title": "Lagoon Nebula · ESO · optical",
-      "credit": "ESO",
-      "displayCredit": "ESO",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso0936a",
-            "role": "material",
-            "evidence": "labs/nebula/models/m8/processing-observations.json#/images/0"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "eso-optical",
+      "credit": "ESO; the default dataset's picture as the Lagoon Nebula bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "Provider terms: https://www.eso.org/public/outreach/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "mpg-eso-2-2m",
-            "evidence": "https://www.eso.org/public/images/eso0936a/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "eso-vista",
-      "path": ".local/nebula-lab/observations/m8-processed/sources/eso-vista.tif",
-      "origin": "https://www.eso.org/public/images/eso1101d/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1101d/",
-      "title": "Lagoon Nebula · ESO VISTA · infrared",
-      "credit": "ESO/VVV. Acknowledgment: Cambridge Astronomical Survey Unit",
-      "displayCredit": "ESO/VVV. Acknowledgment: Cambridge Astronomical Survey Unit",
-      "acquisition": "Unchanged native publisher raster restored through the pinned Nebula Lab observation recipe. The repository-relative path is an ignored cache; native dimensions and image interpretation remain in that recipe.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso1101d",
-            "role": "material",
-            "evidence": "labs/nebula/models/m8/processing-observations.json#/images/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "eso-vista",
-      "license": "Provider terms: https://www.eso.org/public/outreach/copyright/. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "vista",
-            "evidence": "https://www.eso.org/public/images/eso1101d/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "spitzer-mid-infrared",
-      "path": ".local/nebula-lab/observations/m8-processed/sources/spitzer-mid-infrared.skybands.png",
-      "origin": "https://alasky.cds.unistra.fr/hips-image-services/hips2fits",
-      "sourceUrl": "https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/",
-      "title": "Lagoon Nebula · Spitzer IRAC · calibrated mid-infrared maps",
-      "credit": "NASA/JPL-Caltech; HiPS: CDS (CNRS/Unistra)",
-      "displayCredit": "NASA/JPL-Caltech; CDS",
-      "acquisition": "Composed by the pinned sky band recipe src/objects/m8/source/sky-bands/spitzer-irac.json from three pinned CDS hips2fits IRAC 8.0/4.5/3.6 µm maps: calibrated to MJy/sr, one measured background and range per band, one Lupton asinh display. The repository-relative path is an ignored cache that the recipe reproduces byte for byte.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "cds-hips-spitzer-irac",
-            "role": "material",
-            "evidence": "src/objects/m8/source/sky-bands/spitzer-irac.json#/bands"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "spitzer-mid-infrared",
-      "license": "Provider terms: https://www.spitzer.caltech.edu/page/image-use-policy; CDS HiPS distribution under ODbL-1.0. Retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "spitzer",
-            "evidence": "https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "physical-evidence",
-      "path": "src/objects/m8/source/bake-inputs/references/03-physical-evidence.json",
-      "origin": "https://doi.org/10.1111/j.1365-2966.2005.09829.x",
-      "sourceUrl": "https://doi.org/10.1111/j.1365-2966.2005.09829.x",
-      "title": "Lagoon Nebula physical evidence and authored limits",
-      "credit": "Published structural studies; authored display assumptions",
-      "acquisition": "Checked-in evidence ledger. This pin identifies the metadata record; cited publications and native scientific arrays retain their own identities. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "arias-2006-hourglass",
-            "role": "method",
-            "evidence": "src/objects/m8/source/bake-inputs/references/03-physical-evidence.json#/sources/0"
-          },
-          {
-            "catalogueId": "tiwari-2018-pdr",
-            "role": "method",
-            "evidence": "src/objects/m8/source/bake-inputs/references/03-physical-evidence.json#/sources/5"
-          },
-          {
-            "catalogueId": "tiwari-2020-east",
-            "role": "method",
-            "evidence": "src/objects/m8/source/bake-inputs/references/03-physical-evidence.json#/sources/6"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "distance",
-      "path": "src/objects/m8/source/delivery.json",
-      "origin": "https://arxiv.org/pdf/1903.12176v1",
-      "sourceUrl": "https://arxiv.org/pdf/1903.12176v1",
-      "title": "Lagoon Nebula adopted world placement",
-      "credit": "Wright et al. (2019), The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2",
-      "acquisition": "Checked-in delivery record. The pin identifies our placement metadata, not downloaded paper bytes; the adopted value and uncertainty are explained in the body README.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "wright-2019-kinematics",
-            "role": "reference",
-            "evidence": "src/objects/m8/source/delivery.json#/sky/distancePc"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "stellar-field",
-      "path": "src/objects/m8/source/stellar-field.json",
-      "origin": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "sourceUrl": "https://dc.zah.uni-heidelberg.de/tableinfo/gedr3dist.litewithdist",
-      "title": "Lagoon Nebula surrounding Gaia DR3 stellar field",
-      "credit": "ESA/Gaia/DPAC; Bailer-Jones, Rybizki, Fouesneau, Demleitner and Andrae (2021); GAVO",
-      "displayCredit": "ESA/Gaia/DPAC; Bailer-Jones et al.; GAVO",
-      "acquisition": "Compact checked-in extract of Gaia DR3 and Bailer-Jones geometric distance estimates. Exact source response hash, queries, limits and epochs remain in this JSON; no photo boundaries or invented depths.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "gaia-dr3-gavo",
-            "role": "material",
-            "evidence": "src/objects/m8/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "bailer-jones-2021-distances",
-            "role": "method",
-            "evidence": "src/objects/m8/source/stellar-field.json#/provenance"
-          },
-          {
-            "catalogueId": "cardiel-2021-rgb",
-            "role": "method",
-            "evidence": "src/objects/m8/source/stellar-field.json#/provenance"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "CC-BY-4.0 distance catalogue; retain ESA/Gaia/DPAC, authors and GAVO acknowledgements.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "gaia",
-            "evidence": "https://dc.zah.uni-heidelberg.de/tableinfo/gaia.dr3lite — Gaia DR3 astrometry and G/BP/RP photometry, with EDR3-based Bailer-Jones geometric distance inference; catalogue extraction and exact query receipts are pinned in stellar-field.json. Bailer-Jones is a distance method, not another observing facility."
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m8-volume/source/manifest.json)."
       }
     }
   ],
   "documents": [
     {
-      "id": "document-1",
-      "path": "src/objects/m8/source/delivery.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "document-2",
-      "path": "src/objects/m8/source/nebula.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "document-3",
-      "path": "src/objects/m8/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    },
-    {
-      "id": "document-4",
-      "path": "src/objects/m8/source/request.json",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "retained-evidence-5",
-      "path": "src/objects/m8/source/bake-inputs/references/01-compiler.json",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "retained-evidence-6",
-      "path": "src/objects/m8/source/bake-inputs/references/02-depth-model.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-7",
-      "path": "src/objects/m8/source/bake-inputs/references/04-processing-observations.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-8",
-      "path": "src/objects/m8/source/bake-inputs/references/05-processing-structures.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-9",
-      "path": "src/objects/m8/source/provenance-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
-      }
-    },
-    {
-      "id": "retained-evidence-10",
-      "path": "src/objects/m8/source/replay-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned replay reference map; original input paths and accepted byte pins remain preserved."
-      }
-    },
-    {
-      "id": "document-11",
-      "path": "src/objects/m8/source/sky-bands/spitzer-irac.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, catalogue, presentation or saved processing choices. Native published inputs are separately bound in this manifest."
-      }
-    }
-  ],
-  "generatedIntermediates": [
-    {
-      "id": "compact-bake-inputs-json-gz",
-      "path": "src/objects/m8/source/bake-inputs.json.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
+      "path": "preparation/navigation.json"
     }
   ]
 }
diff --git a/src/objects/m8/source/preparation/navigation.json b/src/objects/m8/source/preparation/navigation.json
new file mode 100644
index 00000000000..dab6c640b45
--- /dev/null
+++ b/src/objects/m8/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m8",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m8/source/presentation/context.png b/src/objects/m8/source/presentation/context.png
new file mode 100644
index 00000000000..181e5d7cfbc
Binary files /dev/null and b/src/objects/m8/source/presentation/context.png differ
diff --git a/src/objects/m8/source/presentation/solar-system.json b/src/objects/m8/source/presentation/solar-system.json
new file mode 100644
index 00000000000..374e95894a6
--- /dev/null
+++ b/src/objects/m8/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m8",
+  "displayName": "Lagoon Nebula",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 677379746660464.1,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m8/text.json b/src/objects/m8/text.json
new file mode 100644
index 00000000000..f301e8761b1
--- /dev/null
+++ b/src/objects/m8/text.json
@@ -0,0 +1,72 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m8",
+  "card": {
+    "text": "The Lagoon is a star-forming H II region about 1,326 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "wright-2019-kinematics",
+        "url": "https://arxiv.org/pdf/1903.12176v1",
+        "label": "Wright et al. (2019), The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2",
+        "checked": "2026-10-01",
+        "locator": "distance: 1.326 kpc (−69 / +77 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "The Lagoon is a star-forming H II region about 1,326 parsecs away. Its young NGC 6530 cluster shares the surrounding cloud complex.",
+    "sources": [
+      {
+        "catalogueId": "wright-2019-kinematics",
+        "url": "https://arxiv.org/pdf/1903.12176v1",
+        "label": "Wright et al. (2019), The Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2",
+        "checked": "2026-10-01",
+        "locator": "distance: 1.326 kpc (−69 / +77 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "eso-optical": {
+      "title": "Lagoon nebula in visible light",
+      "detail": "4000 × 2679 px",
+      "summary": "Optical display colors on one inferred cloud front; physical depth and foreground extinction are not recovered.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso0936a",
+          "url": "https://www.eso.org/public/images/eso0936a/",
+          "label": "Lagoon Nebula · ESO · optical; ESO",
+          "checked": "2026-10-01",
+          "locator": "Lagoon Nebula · ESO · optical"
+        }
+      ]
+    },
+    "eso-vista": {
+      "title": "Lagoon in near infrared",
+      "detail": "4000 × 2202 px",
+      "summary": "Near-infrared false color on an inferred cloud front; image coverage is narrower than the optical view.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1101d",
+          "url": "https://www.eso.org/public/images/eso1101d/",
+          "label": "Lagoon Nebula · ESO VISTA · infrared; ESO/VVV. Acknowledgment: Cambridge Astronomical Survey Unit",
+          "checked": "2026-10-01",
+          "locator": "Lagoon Nebula · ESO VISTA · infrared"
+        }
+      ]
+    },
+    "spitzer-mid-infrared": {
+      "title": "Lagoon warm dust in mid-infrared",
+      "detail": "1757 × 1417 px",
+      "summary": "Calibrated mid-infrared false color on an inferred cloud front; image coverage is narrower than the optical view.",
+      "sources": [
+        {
+          "catalogueId": "cds-hips-spitzer-irac",
+          "url": "https://irsa.ipac.caltech.edu/data/SPITZER/docs/irac/",
+          "label": "Lagoon Nebula · Spitzer IRAC · calibrated mid-infrared maps; NASA/JPL-Caltech; HiPS: CDS (CNRS/Unistra)",
+          "checked": "2026-10-01",
+          "locator": "Lagoon Nebula · Spitzer IRAC · calibrated mid-infrared maps"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m81-layers/README.md b/src/objects/m81-layers/README.md
new file mode 100644
index 00000000000..2f10265fb67
--- /dev/null
+++ b/src/objects/m81-layers/README.md
@@ -0,0 +1,66 @@
+# Bode's Galaxy (M81)
+
+A ground-based photograph of M81, cleaned of the Milky Way stars in front of it and colour-tied to its measured integrated
+colour, is spread through a modelled disc and a round bulge. Published catalogues of its planetary nebulae, globular
+clusters and supernova remnants are drawn as dots on the same disc. Image brightness does not measure per-pixel distance.
+
+## Sources
+
+| Selected source | Input and meaning |
+| --- | --- |
+| [Galaxies M81 & M82](https://noirlab.edu/public/images/noao-m81m82/) | [Record](../../sources/noirlab-noao-m81m82.json). T.A. Rector's Mayall 4-meter view of M81 and M82, 8315 × 4642 px over 58.87 × 32.87 arcmin (`source/source.jpg`, the Large JPEG, restored from its origin). Found with `telescope explore m81`. M82 lies 51 kpc out in M81's disc plane, beyond the photograph's support, so it fades out. |
+| [de Blok et al. (2008)](https://arxiv.org/abs/0810.2100) | [Record](../../sources/de-blok-2008-things-rotation-curves.json). THINGS Table 2: M81's H I disc at inclination 59.0° and position angle 330.2°: the disc the photograph and dots lie on. |
+| [Salo et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/4) | [Record](../../sources/salo-2015-s4g-decompositions.json). S4G's 3.6 µm bulge-plus-disc fit: a Sérsic bulge (half-light radius 102.96″ = 1.80 kpc, n = 3.557, axis ratio 0.654, PA 145.0°, 46% of the light) and an exponential disc (scale length 153.17″ = 2.68 kpc, axis ratio 0.543, PA 156.3°). |
+| [Kregel et al. (2002)](https://arxiv.org/abs/astro-ph/0204154) | [Record](../../sources/kregel-2002-disc-flattening.json). Sect. 4.3: discs are on average 7.3 ± 2.2 times longer than thick, so M81's 2.68 kpc scale length gives a 368 pc scale height. |
+| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | The 3,207 Gaia DR3 sources within 0.58° of the photograph's centre that Ren et al.'s criterion marks as Milky Way stars (`source/gaia-dr3-foreground.csv`, restored by the query in the Gaia record). |
+| [RC3](../../sources/rc3-1991.json) | NGC 3031's total B-V, 0.95 ± 0.01 as observed (0.82 corrected). |
+| [Local Volume Database](../../sources/lvdb-v1-1-1.json) | Centre and distance: distance modulus 27.79 (Newman et al. 2024), 3.61 Mpc. |
+| [Jacoby et al. (1989)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/344/704) | [Planetary nebulae](source/jacoby-pne/points.json): 185 from [O III] imaging (B1950; VizieR's ICRS conversion). |
+| [Nantais & Huchra (2010)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/139/2620) | [Globular clusters](source/nantais-gc/points.json): 108 confirmed by spectroscopy. |
+| [Vučetić et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/943) | [Supernova remnants](source/vucetic-snr/points.json): 41 optically identified remnants. |
+| [Smercina et al. (2020)](https://arxiv.org/abs/1910.14672) | [Stellar extent](source/stellar-extent.json): red-giant halo stars detected out to 65 kpc along the minor axis; inside it M81's caption hides. |
+
+The catalogue tables are TAP queries of CDS (the query is each descriptor's `table.origin`); they are not tracked.
+
+## The photograph
+
+- **Registration:** the publisher's stated centre does not match the Large JPEG: M81's and M82's cores sit 769 px and
+  339 px from where it puts them, with rotation and scale right to 0.09° and 0.03%. The recipe's centre is re-measured
+  from the two cores; bright Gaia stars then land on their images.
+- **Foreground stars:** 1,343 of the 1,585 Gaia foreground stars in the image are removed where they show; 61 on
+  extended light are left.
+- **Colour:** tied to RC3's B-V of 0.95: red/green 0.960 and blue/green 0.853 against 1.328 and 0.776, so red × 1.383
+  and blue × 0.909 in linear light. The publisher's composite had run green.
+- **Bulge:** S4G's fit splits the light; its bulge becomes an oblate spheroid with intrinsic axis ratio 0.47 (the one that
+  projects to 0.654 at 59°), so seen from above it stays round. The fit's bulge falls off more slowly than its disc and
+  would keep a third of the light at 9 kpc, the arms' light, so its share fades to nothing between 3 and 6 kpc
+  (`extentKpc.fadeFrom`), a presentation choice. Where the photograph is saturated (21,105 pixels) the fit's light
+  stands in.
+- **Disc:** inclination 59.0°, line of nodes 150.2°, support 16.5 kpc (where the frame stops on its tightest side), 32
+  slabs with an exponential of 368 pc over ±3 scale heights.
+
+## Dots
+
+| Catalogue | Drawn | Left out |
+| --- | --- | --- |
+| Planetary nebulae (Jacoby et al. 1989) | 185, 127 of them in the bulge | none |
+| Globular clusters (Nantais & Huchra 2010) | 100, 33 of them in the bulge | 8 beyond the photograph |
+| Supernova remnants (Vučetić et al. 2015) | 41 | none |
+
+Dots keep their place in the disc and rise along its axis to heights drawn from the 368 pc layer; old objects near the
+centre are bulge members with the bulge's share of the light. Colours are the Milky Way's and M31's for each kind; each dot takes its tone from the photograph's brightness under it (never below 15%) and moves halfway from its kind's colour to the photograph's colour there, so dots sit in the galaxy's light instead of on it; flat tints read as dark specks on the bright bulge. Globular clusters belong to the halo, so on the disc their places are
+approximate.
+
+## Evidence
+
+- Dots from the photograph: the default view (left) and tilted (right), in the app with each dot's tone and colour taken from the photograph. Captured on this branch on 2026-09-29.
+- The prepared bank's `approximation.limitations` records the foreground, colour-tie and saturation counts quoted above.
+- Bytes: 150 layer images, 1.47 MB.
+- Tests: `packages/bake/src/image-layers/bulge.test.mts` pins the bulge model and its fade (`extentKpc.fadeFrom`), on M81's fit.
+
+## Known problems
+
+- One flat disc and one bulge fit; the ongoing interaction with M82 and NGC 3077 is not modelled.
+- The dot catalogues trace old objects; no catalogue of M81's HII regions with positions is on CDS, so its young
+  population shows only in the photograph.
+- Depth is modelled: slabs and bulge are the photograph along our sight lines, so side views are approximate.
diff --git a/src/objects/m81-layers/inventory.json b/src/objects/m81-layers/inventory.json
new file mode 100644
index 00000000000..2441c42f74f
--- /dev/null
+++ b/src/objects/m81-layers/inventory.json
@@ -0,0 +1,929 @@
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diff --git a/src/objects/m81-layers/object.json b/src/objects/m81-layers/object.json
new file mode 100644
index 00000000000..0b3f439fa27
--- /dev/null
+++ b/src/objects/m81-layers/object.json
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+}
diff --git a/src/objects/m81/source/dots/merge.json b/src/objects/m81-layers/source/dots/merge.json
similarity index 100%
rename from src/objects/m81/source/dots/merge.json
rename to src/objects/m81-layers/source/dots/merge.json
diff --git a/src/objects/m81/source/jacoby-pne/points.json b/src/objects/m81-layers/source/jacoby-pne/points.json
similarity index 100%
rename from src/objects/m81/source/jacoby-pne/points.json
rename to src/objects/m81-layers/source/jacoby-pne/points.json
diff --git a/src/objects/m81-layers/source/manifest.json b/src/objects/m81-layers/source/manifest.json
new file mode 100644
index 00000000000..bfcf73f1d52
--- /dev/null
+++ b/src/objects/m81-layers/source/manifest.json
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+{
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+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "optical",
+      "path": "src/objects/m81-layers/source/source.jpg",
+      "origin": "https://noirlab.edu/public/images/noao-m81m82/",
+      "sourceUrl": "https://noirlab.edu/public/images/noao-m81m82/",
+      "title": "Galaxies M81 & M82",
+      "credit": "T.A. Rector (University of Alaska Anchorage) and NOIRLab/NSF/AURA",
+      "displayCredit": "NOIRLab",
+      "acquisition": "The publisher Large JPEG (8315 x 4642 px), restored from its origin; not tracked. Registration re-measured against catalogued positions (recipe observation). The hash identifies the local JPEG bytes, not a calibrated scientific array.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noao-m81m82",
+            "role": "material",
+            "evidence": "src/objects/m81-layers/source/provenance.json"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "optical",
+      "license": "CC-BY-4.0; retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "unresolved",
+            "label": "Mayall 4-m Mosaic, colour composite",
+            "evidence": "https://noirlab.edu/public/images/noao-m81m82/",
+            "reason": "The publisher's colour composite; the retained record does not identify the individual exposures."
+          }
+        ]
+      }
+    },
+    {
+      "id": "jacoby-pne-table",
+      "path": "src/objects/m81-layers/source/jacoby-pne/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%2A+FROM+%22J%2FApJ%2F344%2F704%2Ftable1%22",
+      "title": "Planetary nebulae as standard candles. III. The distance to M 81, table.csv",
+      "credit": "G. H. Jacoby, R. Ciardullo, H. C. Ford, J. Booth; ApJ 344, 704",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through jacoby-pne/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "jacoby-1989-m81-pne",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%2A+FROM+%22J%2FApJ%2F344%2F704%2Ftable1%22"
+          }
+        ]
+      }
+    },
+    {
+      "id": "nantais-gc-table",
+      "path": "src/objects/m81-layers/source/nantais-gc/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FAJ%2F139%2F2620%2FM81glob%22",
+      "title": "Spectroscopy of M81 globular clusters, table.csv",
+      "credit": "J. B. Nantais, J. P. Huchra; AJ 139, 2620",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through nantais-gc/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "nantais-2010-m81-globular-clusters",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FAJ%2F139%2F2620%2FM81glob%22"
+          }
+        ]
+      }
+    },
+    {
+      "id": "vucetic-snr-table",
+      "path": "src/objects/m81-layers/source/vucetic-snr/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F446%2F943%2Fm81%22",
+      "title": "Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H-alpha emission, table.csv",
+      "credit": "M. M. Vucetic, B. Arbutina, D. Urosevic; MNRAS 446, 943",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through vucetic-snr/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "vucetic-2015-optical-snr",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F446%2F943%2Fm81%22"
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "recipe",
+      "path": "src/objects/m81-layers/source/recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Image-layer preparation recipe",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "provenance",
+      "path": "src/objects/m81-layers/source/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Published image interpretation and acquisition record",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "presentation",
+      "path": "src/objects/m81-layers/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Dataset presentation and prepared-bank bindings",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "stellar-extent",
+      "path": "src/objects/m81-layers/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "smercina-2020-m81-halo",
+            "role": "reference",
+            "evidence": "https://arxiv.org/abs/1910.14672"
+          }
+        ]
+      }
+    },
+    {
+      "id": "dots-merge",
+      "kind": "authored-document",
+      "path": "src/objects/m81-layers/source/dots/merge.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "jacoby-pne-points",
+      "kind": "authored-document",
+      "path": "src/objects/m81-layers/source/jacoby-pne/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the Planetary nebulae as standard candles. III. The distance to M 81 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "nantais-gc-points",
+      "kind": "authored-document",
+      "path": "src/objects/m81-layers/source/nantais-gc/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the Spectroscopy of M81 globular clusters rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "vucetic-snr-points",
+      "kind": "authored-document",
+      "path": "src/objects/m81-layers/source/vucetic-snr/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H-alpha emission rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/m81/source/nantais-gc/points.json b/src/objects/m81-layers/source/nantais-gc/points.json
similarity index 100%
rename from src/objects/m81/source/nantais-gc/points.json
rename to src/objects/m81-layers/source/nantais-gc/points.json
diff --git a/src/objects/m81/source/presentation.json b/src/objects/m81-layers/source/presentation.json
similarity index 85%
rename from src/objects/m81/source/presentation.json
rename to src/objects/m81-layers/source/presentation.json
index b974643bba3..c7ec17f3cc5 100644
--- a/src/objects/m81/source/presentation.json
+++ b/src/objects/m81-layers/source/presentation.json
@@ -1,19 +1,19 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m81",
+  "objectId": "m81-layers",
   "name": "Bode's Galaxy (M81)",
   "defaultDataset": "optical",
   "bank": {
-    "path": "src/objects/m81/prepared/image-layers.json"
+    "path": "src/objects/m81-layers/prepared/image-layers.json"
   },
   "recipes": [
     {
       "id": "image-layer-recipe",
-      "path": "src/objects/m81/source/recipe.json"
+      "path": "src/objects/m81-layers/source/recipe.json"
     },
     {
       "id": "source-evidence",
-      "path": "src/objects/m81/source/provenance.json"
+      "path": "src/objects/m81-layers/source/provenance.json"
     }
   ],
   "sharedInputs": [],
@@ -49,7 +49,7 @@
       ],
       "input": "optical",
       "preview": {
-        "path": "src/objects/m81/source/source.jpg",
+        "path": "src/objects/m81-layers/source/source.jpg",
         "url": "https://storage.noirlab.edu/media/archives/images/large/noao-m81m82.jpg",
         "crop": {
           "left": 508,
diff --git a/src/objects/m81/source/provenance.json b/src/objects/m81-layers/source/provenance.json
similarity index 100%
rename from src/objects/m81/source/provenance.json
rename to src/objects/m81-layers/source/provenance.json
diff --git a/src/objects/m81/source/recipe.json b/src/objects/m81-layers/source/recipe.json
similarity index 99%
rename from src/objects/m81/source/recipe.json
rename to src/objects/m81-layers/source/recipe.json
index a86981414fa..c78ef3bdfe3 100644
--- a/src/objects/m81/source/recipe.json
+++ b/src/objects/m81-layers/source/recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-image-layer-recipe@1",
-  "id": "m81",
+  "id": "m81-layers",
   "source": {
     "path": "source.jpg",
     "dimensions": [
diff --git a/src/objects/m81/source/stellar-extent.json b/src/objects/m81-layers/source/stellar-extent.json
similarity index 94%
rename from src/objects/m81/source/stellar-extent.json
rename to src/objects/m81-layers/source/stellar-extent.json
index 0e19c8ce26e..cc5f7c33d98 100644
--- a/src/objects/m81/source/stellar-extent.json
+++ b/src/objects/m81-layers/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "m81",
+  "objectId": "m81-layers",
   "radiusPc": 65000,
   "definition": "Projected radius along M81's minor axis out to which Subaru Hyper Suprime-Cam star counts still detect its red-giant halo.",
   "quote": "we detect RGB halo sources out to 65 kpc",
diff --git a/src/objects/m81/source/vucetic-snr/points.json b/src/objects/m81-layers/source/vucetic-snr/points.json
similarity index 100%
rename from src/objects/m81/source/vucetic-snr/points.json
rename to src/objects/m81-layers/source/vucetic-snr/points.json
diff --git a/src/objects/m81/README.md b/src/objects/m81/README.md
index 2f10265fb67..c1bfe21595d 100644
--- a/src/objects/m81/README.md
+++ b/src/objects/m81/README.md
@@ -1,66 +1,16 @@
 # Bode's Galaxy (M81)
 
-A ground-based photograph of M81, cleaned of the Milky Way stars in front of it and colour-tied to its measured integrated
-colour, is spread through a modelled disc and a round bulge. Published catalogues of its planetary nebulae, globular
-clusters and supernova remnants are drawn as dots on the same disc. Image brightness does not measure per-pixel distance.
+Bode's Galaxy (M81) as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Bode's Galaxy (M81) image layers](../m81-layers/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Selected source | Input and meaning |
-| --- | --- |
-| [Galaxies M81 & M82](https://noirlab.edu/public/images/noao-m81m82/) | [Record](../../sources/noirlab-noao-m81m82.json). T.A. Rector's Mayall 4-meter view of M81 and M82, 8315 × 4642 px over 58.87 × 32.87 arcmin (`source/source.jpg`, the Large JPEG, restored from its origin). Found with `telescope explore m81`. M82 lies 51 kpc out in M81's disc plane, beyond the photograph's support, so it fades out. |
-| [de Blok et al. (2008)](https://arxiv.org/abs/0810.2100) | [Record](../../sources/de-blok-2008-things-rotation-curves.json). THINGS Table 2: M81's H I disc at inclination 59.0° and position angle 330.2°: the disc the photograph and dots lie on. |
-| [Salo et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/4) | [Record](../../sources/salo-2015-s4g-decompositions.json). S4G's 3.6 µm bulge-plus-disc fit: a Sérsic bulge (half-light radius 102.96″ = 1.80 kpc, n = 3.557, axis ratio 0.654, PA 145.0°, 46% of the light) and an exponential disc (scale length 153.17″ = 2.68 kpc, axis ratio 0.543, PA 156.3°). |
-| [Kregel et al. (2002)](https://arxiv.org/abs/astro-ph/0204154) | [Record](../../sources/kregel-2002-disc-flattening.json). Sect. 4.3: discs are on average 7.3 ± 2.2 times longer than thick, so M81's 2.68 kpc scale length gives a 368 pc scale height. |
-| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | The 3,207 Gaia DR3 sources within 0.58° of the photograph's centre that Ren et al.'s criterion marks as Milky Way stars (`source/gaia-dr3-foreground.csv`, restored by the query in the Gaia record). |
-| [RC3](../../sources/rc3-1991.json) | NGC 3031's total B-V, 0.95 ± 0.01 as observed (0.82 corrected). |
-| [Local Volume Database](../../sources/lvdb-v1-1-1.json) | Centre and distance: distance modulus 27.79 (Newman et al. 2024), 3.61 Mpc. |
-| [Jacoby et al. (1989)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/344/704) | [Planetary nebulae](source/jacoby-pne/points.json): 185 from [O III] imaging (B1950; VizieR's ICRS conversion). |
-| [Nantais & Huchra (2010)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/139/2620) | [Globular clusters](source/nantais-gc/points.json): 108 confirmed by spectroscopy. |
-| [Vučetić et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/943) | [Supernova remnants](source/vucetic-snr/points.json): 41 optically identified remnants. |
-| [Smercina et al. (2020)](https://arxiv.org/abs/1910.14672) | [Stellar extent](source/stellar-extent.json): red-giant halo stars detected out to 65 kpc along the minor axis; inside it M81's caption hides. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m81.json) cites the position, distance and velocity that place it.
 
-The catalogue tables are TAP queries of CDS (the query is each descriptor's `table.origin`); they are not tracked.
+## Processing
 
-## The photograph
-
-- **Registration:** the publisher's stated centre does not match the Large JPEG: M81's and M82's cores sit 769 px and
-  339 px from where it puts them, with rotation and scale right to 0.09° and 0.03%. The recipe's centre is re-measured
-  from the two cores; bright Gaia stars then land on their images.
-- **Foreground stars:** 1,343 of the 1,585 Gaia foreground stars in the image are removed where they show; 61 on
-  extended light are left.
-- **Colour:** tied to RC3's B-V of 0.95: red/green 0.960 and blue/green 0.853 against 1.328 and 0.776, so red × 1.383
-  and blue × 0.909 in linear light. The publisher's composite had run green.
-- **Bulge:** S4G's fit splits the light; its bulge becomes an oblate spheroid with intrinsic axis ratio 0.47 (the one that
-  projects to 0.654 at 59°), so seen from above it stays round. The fit's bulge falls off more slowly than its disc and
-  would keep a third of the light at 9 kpc, the arms' light, so its share fades to nothing between 3 and 6 kpc
-  (`extentKpc.fadeFrom`), a presentation choice. Where the photograph is saturated (21,105 pixels) the fit's light
-  stands in.
-- **Disc:** inclination 59.0°, line of nodes 150.2°, support 16.5 kpc (where the frame stops on its tightest side), 32
-  slabs with an exponential of 368 pc over ±3 scale heights.
-
-## Dots
-
-| Catalogue | Drawn | Left out |
-| --- | --- | --- |
-| Planetary nebulae (Jacoby et al. 1989) | 185, 127 of them in the bulge | none |
-| Globular clusters (Nantais & Huchra 2010) | 100, 33 of them in the bulge | 8 beyond the photograph |
-| Supernova remnants (Vučetić et al. 2015) | 41 | none |
-
-Dots keep their place in the disc and rise along its axis to heights drawn from the 368 pc layer; old objects near the
-centre are bulge members with the bulge's share of the light. Colours are the Milky Way's and M31's for each kind; each dot takes its tone from the photograph's brightness under it (never below 15%) and moves halfway from its kind's colour to the photograph's colour there, so dots sit in the galaxy's light instead of on it; flat tints read as dark specks on the bright bulge. Globular clusters belong to the halo, so on the disc their places are
-approximate.
-
-## Evidence
-
-- Dots from the photograph: the default view (left) and tilted (right), in the app with each dot's tone and colour taken from the photograph. Captured on this branch on 2026-09-29.
-- The prepared bank's `approximation.limitations` records the foreground, colour-tie and saturation counts quoted above.
-- Bytes: 150 layer images, 1.47 MB.
-- Tests: `packages/bake/src/image-layers/bulge.test.mts` pins the bulge model and its fade (`extentKpc.fadeFrom`), on M81's fit.
+1. `pnpm prepare:objects --object=m81` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m81` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- One flat disc and one bulge fit; the ongoing interaction with M82 and NGC 3077 is not modelled.
-- The dot catalogues trace old objects; no catalogue of M81's HII regions with positions is on CDS, so its young
-  population shows only in the photograph.
-- Depth is modelled: slabs and bulge are the photograph along our sight lines, so side views are approximate.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m81/inventory.json b/src/objects/m81/inventory.json
index d384688c361..56d9c15ee37 100644
--- a/src/objects/m81/inventory.json
+++ b/src/objects/m81/inventory.json
@@ -3,927 +3,51 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/optical.webp",
+      "filename": "m81-dataset-optical.webp",
       "bytes": 5842,
       "sha256": "e2fbb981cbaef37caab5c0e14c8440b7e3fdffd70b3f9581d6751b4818f161af"
     },
     {
       "location": "prepared",
-      "filename": "dots.bin",
-      "bytes": 4350,
-      "sha256": "d36a58cae7b957283b39845daeabfa1d101248e94601d65369ddfdbecb62e3a9"
+      "filename": "content.json",
+      "bytes": 1726,
+      "sha256": "ef3498502450a81a49bba10e012c76750c2a2d0061bc742d12c02544f53cd366"
     },
     {
       "location": "prepared",
-      "filename": "image-layers.json",
-      "bytes": 260041,
-      "sha256": "7d91de39526b5c1816c3cf56c123ab40000848c3bac0727902c9d63435a0dbbf"
+      "filename": "controls.json",
+      "bytes": 452,
+      "sha256": "bc6afad13c0ea0ba4a4d32a4642dd2c318d15701505b39ed0242c607a70090f3"
     },
     {
       "location": "prepared",
-      "filename": "layers/bulge-x-01.webp",
-      "bytes": 912,
-      "sha256": "9e9a09b695a375a24a3340404fbe03759f97351e36ad5aa9b7f15b6b9d6127b1"
+      "filename": "datasets.json",
+      "bytes": 538,
+      "sha256": "9ee8b9268273b360f941d7b9219cfe0aa1a51c595aabf420c823a6594e2eb90a"
     },
     {
       "location": "prepared",
-      "filename": "layers/bulge-x-02.webp",
-      "bytes": 1388,
-      "sha256": "e9c0b3b6f25a9501808002ac496a82ea7259b4ac31362731bfee622f652abfba"
+      "filename": "runtime.json",
+      "bytes": 4568,
+      "sha256": "5df3e546bdf0b349e1ccfd3c2a4a7d62acb38d2e5a85a36ae94903611ac9552c"
     },
     {
       "location": "prepared",
-      "filename": "layers/bulge-x-03.webp",
-      "bytes": 1844,
-      "sha256": "73082e6f17a6ec5370f27bb027877c918019ccfdc236dc847eb7a5214e827e57"
+      "filename": "scene.json",
+      "bytes": 3858,
+      "sha256": "79fe0d863316374afce5bdea3f6a852621dbdbfbb2ea50d4b4817863bd8873f3"
     },
     {
       "location": "prepared",
-      "filename": "layers/bulge-x-04.webp",
-      "bytes": 1974,
-      "sha256": "713638c635e1556fd94c1fd1cc80720733975c22adcc579b37f7be3d92a18764"
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diff --git a/src/objects/m81/object.json b/src/objects/m81/object.json
index d1154b16dd1..3bc1dc67143 100644
--- a/src/objects/m81/object.json
+++ b/src/objects/m81/object.json
@@ -1,45 +1,99 @@
 {
   "schema": "cssearth-object@2",
   "id": "m81",
-  "type": "image-layer-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Bode's Galaxy (M81)",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 509136800946075600
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "M81",
+      "systemName": "Galaxy catalogue",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 745461352900,
+      "description": "A galaxy 3.6 million parsecs away.",
+      "aliases": [
+        "NGC 3031",
+        "UGC 5318",
+        "PGC 28630",
+        "MCG+12-10-010",
+        "Bode's Galaxy"
+      ],
+      "order": 5146,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
-        -3.411491722436787e+22,
-        2.058893637352022e+22,
-        1.0415783974140264e+23
+        -3.4114911797827514e+22,
+        2.0588933098510244e+22,
+        1.0415782317338e+23
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-        -0.08930706120176772,
-        0.1582093277807502,
-        0.8563433271933439,
-        -0.4833944180419343
+      "presentationToReference": [
+        -0.49227712395359197,
+        0,
+        0.8704385292667024,
+        0.79861173673608,
+        0.3977771559319137,
+        0.45165543079442777,
+        0.34624056258526664,
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+        0.19581659429660195
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-          14.620661041506528,
-          30.056534702444424
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-      }
-    },
-    "preparation": {
-      "source": "source/recipe.json"
-    },
-    "cataloguePoints": [
-      "dots"
-    ]
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 1642376777245405200,
+      "bodyRadiusM": 509136800946075600000
+    }
   },
   "prepared": {
-    "format": "cssearth-image-layer-bank@1",
-    "url": "prepared/image-layers.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m81/source/content/object.json b/src/objects/m81/source/content/object.json
new file mode 100644
index 00000000000..2f6c6f70575
--- /dev/null
+++ b/src/objects/m81/source/content/object.json
@@ -0,0 +1,80 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m81",
+  "displayName": "M81",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "3.614 Mpc (\u221265,960 / +33,440 pc)",
+        "source": {
+          "catalogueId": "publication-newman2024apj-966-175n",
+          "url": "https://ui.adsabs.harvard.edu/abs/2024ApJ...966..175N",
+          "label": "Newman2024ApJ...966..175N: An Empirical Calibration of the Tip of the Red Giant Branch Distance Method in the Near Infrared. I. Hubble Space Telescope WFC3/IR F110W and F160W Filters",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 148.9\u00b0, Dec 69.07\u00b0",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "optical",
+    "controls": [
+      {
+        "id": "optical",
+        "label": "NOIRLab \u00b7 optical",
+        "thumbnail": "m81-dataset-optical.webp",
+        "volume": {
+          "objectId": "m81-layers",
+          "datasetId": "optical",
+          "surface": "optical"
+        },
+        "source": {
+          "id": "m81-layers-optical",
+          "path": "../../m81-layers/source/manifest.json",
+          "url": "https://noirlab.edu/public/images/noao-m81m82/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Newman2024ApJ...966..175N: An Empirical Calibration of the Tip of the Red Giant Branch Distance Method in the Near Infrared. I. Hubble Space Telescope WFC3/IR F110W and F160W Filters",
+      "href": "https://ui.adsabs.harvard.edu/abs/2024ApJ...966..175N"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+      "href": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://ui.adsabs.harvard.edu/abs/2024ApJ...966..175N",
+      "credit": "Newman2024ApJ...966..175N: An Empirical Calibration of the Tip of the Red Giant Branch Distance Method in the Near Infrared. I. Hubble Space Telescope WFC3/IR F110W and F160W Filters"
+    }
+  }
+}
diff --git a/src/objects/m81/source/manifest.json b/src/objects/m81/source/manifest.json
index 7635a6f9ee9..053c9d79d17 100644
--- a/src/objects/m81/source/manifest.json
+++ b/src/objects/m81/source/manifest.json
@@ -1,197 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "optical",
-      "path": "src/objects/m81/source/source.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://noirlab.edu/public/images/noao-m81m82/",
-      "sourceUrl": "https://noirlab.edu/public/images/noao-m81m82/",
-      "title": "Galaxies M81 & M82",
-      "credit": "T.A. Rector (University of Alaska Anchorage) and NOIRLab/NSF/AURA",
-      "displayCredit": "NOIRLab",
-      "acquisition": "The publisher Large JPEG (8315 x 4642 px), restored from its origin; not tracked. Registration re-measured against catalogued positions (recipe observation). The hash identifies the local JPEG bytes, not a calibrated scientific array.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "noirlab-noao-m81m82",
-            "role": "material",
-            "evidence": "src/objects/m81/source/provenance.json"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "optical",
+      "credit": "T.A. Rector (University of Alaska Anchorage) and NOIRLab/NSF/AURA; the default dataset's picture as the Bode's Galaxy (M81) bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0; retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "Mayall 4-m Mosaic, colour composite",
-            "evidence": "https://noirlab.edu/public/images/noao-m81m82/",
-            "reason": "The publisher's colour composite; the retained record does not identify the individual exposures."
-          }
-        ]
-      }
-    },
-    {
-      "id": "jacoby-pne-table",
-      "path": "src/objects/m81/source/jacoby-pne/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%2A+FROM+%22J%2FApJ%2F344%2F704%2Ftable1%22",
-      "title": "Planetary nebulae as standard candles. III. The distance to M 81, table.csv",
-      "credit": "G. H. Jacoby, R. Ciardullo, H. C. Ford, J. Booth; ApJ 344, 704",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through jacoby-pne/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "jacoby-1989-m81-pne",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%2A+FROM+%22J%2FApJ%2F344%2F704%2Ftable1%22"
-          }
-        ]
-      }
-    },
-    {
-      "id": "nantais-gc-table",
-      "path": "src/objects/m81/source/nantais-gc/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FAJ%2F139%2F2620%2FM81glob%22",
-      "title": "Spectroscopy of M81 globular clusters, table.csv",
-      "credit": "J. B. Nantais, J. P. Huchra; AJ 139, 2620",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through nantais-gc/points.json.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "nantais-2010-m81-globular-clusters",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FAJ%2F139%2F2620%2FM81glob%22"
-          }
-        ]
-      }
-    },
-    {
-      "id": "vucetic-snr-table",
-      "path": "src/objects/m81/source/vucetic-snr/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F446%2F943%2Fm81%22",
-      "title": "Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H-alpha emission, table.csv",
-      "credit": "M. M. Vucetic, B. Arbutina, D. Urosevic; MNRAS 446, 943",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through vucetic-snr/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "vucetic-2015-optical-snr",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F446%2F943%2Fm81%22"
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m81-layers/source/manifest.json)."
       }
     }
   ],
   "documents": [
     {
-      "id": "recipe",
-      "path": "src/objects/m81/source/recipe.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Image-layer preparation recipe",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "provenance",
-      "path": "src/objects/m81/source/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Published image interpretation and acquisition record",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "presentation",
-      "path": "src/objects/m81/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Dataset presentation and prepared-bank bindings",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "stellar-extent",
-      "path": "src/objects/m81/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "smercina-2020-m81-halo",
-            "role": "reference",
-            "evidence": "https://arxiv.org/abs/1910.14672"
-          }
-        ]
-      }
-    },
-    {
-      "id": "dots-merge",
-      "kind": "authored-document",
-      "path": "src/objects/m81/source/dots/merge.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "jacoby-pne-points",
-      "kind": "authored-document",
-      "path": "src/objects/m81/source/jacoby-pne/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the Planetary nebulae as standard candles. III. The distance to M 81 rows drawn as dots.",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "nantais-gc-points",
-      "kind": "authored-document",
-      "path": "src/objects/m81/source/nantais-gc/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the Spectroscopy of M81 globular clusters rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "vucetic-snr-points",
-      "kind": "authored-document",
-      "path": "src/objects/m81/source/vucetic-snr/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H-alpha emission rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/m81/source/preparation/navigation.json b/src/objects/m81/source/preparation/navigation.json
new file mode 100644
index 00000000000..7fc49b2c5e2
--- /dev/null
+++ b/src/objects/m81/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m81",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m81/source/presentation/context.png b/src/objects/m81/source/presentation/context.png
new file mode 100644
index 00000000000..f6e8abad145
Binary files /dev/null and b/src/objects/m81/source/presentation/context.png differ
diff --git a/src/objects/m81/source/presentation/solar-system.json b/src/objects/m81/source/presentation/solar-system.json
new file mode 100644
index 00000000000..a6184bef91a
--- /dev/null
+++ b/src/objects/m81/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m81",
+  "displayName": "Bode's Galaxy (M81)",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 5.091368009460756e+17,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m81/text.json b/src/objects/m81/text.json
new file mode 100644
index 00000000000..0183df440b8
--- /dev/null
+++ b/src/objects/m81/text.json
@@ -0,0 +1,44 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m81",
+  "card": {
+    "text": "A galaxy 3.6 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-newman2024apj-966-175n",
+        "url": "https://ui.adsabs.harvard.edu/abs/2024ApJ...966..175N",
+        "label": "Newman2024ApJ...966..175N: An Empirical Calibration of the Tip of the Red Giant Branch Distance Method in the Near Infrared. I. Hubble Space Telescope WFC3/IR F110W and F160W Filters",
+        "checked": "2026-10-01",
+        "locator": "distance: 3.614 Mpc (−65,960 / +33,440 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 3.6 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-newman2024apj-966-175n",
+        "url": "https://ui.adsabs.harvard.edu/abs/2024ApJ...966..175N",
+        "label": "Newman2024ApJ...966..175N: An Empirical Calibration of the Tip of the Red Giant Branch Distance Method in the Near Infrared. I. Hubble Space Telescope WFC3/IR F110W and F160W Filters",
+        "checked": "2026-10-01",
+        "locator": "distance: 3.614 Mpc (−65,960 / +33,440 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "optical": {
+      "title": "Galaxies M81 & M82",
+      "detail": "8315 × 4642 px",
+      "summary": "Visible-light image on an approximate depth model with a round bulge; individual depths are not measured.",
+      "sources": [
+        {
+          "catalogueId": "noirlab-noao-m81m82",
+          "url": "https://noirlab.edu/public/images/noao-m81m82/",
+          "label": "Galaxies M81 & M82; T.A. Rector (University of Alaska Anchorage) and NOIRLab/NSF/AURA",
+          "checked": "2026-10-01",
+          "locator": "Galaxies M81 & M82"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m83-layers/README.md b/src/objects/m83-layers/README.md
new file mode 100644
index 00000000000..03626dc12a9
--- /dev/null
+++ b/src/objects/m83-layers/README.md
@@ -0,0 +1,62 @@
+# Southern Pinwheel (M83)
+
+A ground-based photograph of M83, cleaned of the Milky Way stars in front of it and colour-tied to its measured
+integrated colour, is spread through a modelled disc. Published catalogues of its supernova remnants, HII regions and
+Wolf-Rayet sources are drawn as dots on the same disc. Image brightness does not measure per-pixel distance.
+
+## Sources
+
+| Selected source | Input and meaning |
+| --- | --- |
+| [The Southern Pinwheel](https://www.eso.org/public/images/m83/) | [Record](../../sources/eso-m83.json). The Danish 1.54-metre view in B, V and R, 2373 × 2164 px over 15.60 × 14.23 arcmin (`source/source.jpg`, the Large JPEG, restored from its origin). Found in the WorldWide Telescope image index; the DECam image (noirlab2107a) cuts the disc at the top and bottom, and HAWK-I's (eso0825a) is near-infrared. |
+| [Lundgren et al. (2004)](https://arxiv.org/abs/astro-ph/0404026) | [Record](../../sources/lundgren-2004-m83-molecular-kinematics.json). Table 1: position angle 45° and inclination 24°, the values their CO kinematics of the whole optical disc adopt: the disc the photograph and dots lie on. |
+| [Salo et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/4) | [Record](../../sources/salo-2015-s4g-decompositions.json). S4G's 3.6 µm fit: an exponential disc with scale length 106.75″ (2.53 kpc), 87% of the light; its bulge is a small nuclear one (8%, half-light radius 9.35″ = 0.22 kpc). |
+| [Kregel et al. (2002)](https://arxiv.org/abs/astro-ph/0204154) | [Record](../../sources/kregel-2002-disc-flattening.json). Sect. 4.3: discs are on average 7.3 ± 2.2 times longer than thick, so the 2.53 kpc scale length gives a 347 pc scale height. |
+| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | The 1,297 Gaia DR3 sources within 0.2° of M83's centre that Ren et al.'s criterion marks as Milky Way stars (`source/gaia-dr3-foreground.csv`, restored by the query in the Gaia record). |
+| [RC3](../../sources/rc3-1991.json) | NGC 5236's total B-V, 0.66 ± 0.03 as observed. |
+| [Local Volume Database](../../sources/lvdb-v1-1-1.json) | Centre and distance: distance modulus 28.45 (Tully et al. 2009), 4.90 Mpc. |
+| [Winkler et al. (2023)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/943/15) | [Supernova remnants](source/winkler-snr/points.json): 366 remnants and candidates over the whole galaxy. |
+| [Long et al. (2022)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/929/144) | [HII regions](source/long-hii/points.json): 188 from MUSE fields over the inner disc. |
+| [Hadfield et al. (2005)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/439/265) | [Wolf-Rayet sources](source/hadfield-wr/points.json): the 132 with confirmed Wolf-Rayet signatures. |
+| [Bell et al. (2025)](https://arxiv.org/abs/2512.11744) | [Stellar extent](source/stellar-extent.json): the resolved red-giant halo mapped out to 40 kpc; inside it M83's caption hides. |
+
+The catalogue tables are TAP queries of CDS (the query is each descriptor's `table.origin`); they are not tracked.
+
+## The photograph
+
+- **Registration:** the publisher's orientation (1.6° right of vertical) and centre do not match the image: 41 of the 150
+  brightest Gaia stars agree on 0.1° and a centre 67 and 87 px away, with the scale unchanged. Bright stars then fall
+  within 2 px of their images.
+- **Foreground stars:** 69 of the 645 Gaia foreground stars in the image are removed where they show; 301 on the
+  galaxy's light are left, and most of the rest are too faint to show.
+- **Colour:** tied to RC3's B-V of 0.66: red/green 1.162 and blue/green 1.263 against 1.126 and 0.891, so red × 0.969
+  and blue × 0.706 in linear light. The publisher's composite ran blue.
+- **Disc:** inclination 24°, line of nodes 45°, support 9.3 kpc (where the frame stops on its tightest side), 32 slabs
+  with an exponential of 347 pc over ±3 scale heights. No bulge: S4G's nuclear bulge, round on the sky (axis ratio
+  0.897), cannot come from an oblate spheroid seen at 24°, and it holds 8% of the light.
+
+## Dots
+
+| Catalogue | Drawn | Left out |
+| --- | --- | --- |
+| Supernova remnants (Winkler et al. 2023) | 365 | 1 beyond the photograph |
+| HII regions (Long et al. 2022) | 188 | none |
+| Wolf-Rayet sources (Hadfield et al. 2005) | 132 | none |
+
+Dots keep their place in the disc and rise along its axis to heights drawn from the 347 pc layer. Colours are the Milky
+Way's and M31's for each kind; each dot takes its tone from the photograph's brightness under it (never below 15%) and
+moves halfway from its kind's colour to the photograph's colour there.
+
+## Evidence
+
+- In the app: the default view (left) and tilted (right), with the dots.
+  Captured on this branch on 2026-09-29.
+- The prepared bank's `approximation.limitations` records the foreground and colour-tie counts quoted above.
+
+## Known problems
+
+- [Heald et al. (2016)](https://arxiv.org/abs/1607.03365) fit M83's HI disc at 48°, twice the optical disc's 24°; the outer HI disc is warped and is not
+  modelled.
+- The frame stops at 9.3 kpc, inside the disc's outer arms, its ultraviolet disc and its stellar halo.
+- The HII regions cover the MUSE fields only.
+- Depth is modelled: slabs are the photograph along our sight lines, so side views are approximate.
diff --git a/src/objects/m83-layers/inventory.json b/src/objects/m83-layers/inventory.json
new file mode 100644
index 00000000000..a60a192dfb7
--- /dev/null
+++ b/src/objects/m83-layers/inventory.json
@@ -0,0 +1,515 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/optical.webp",
+      "bytes": 14088,
+      "sha256": "7ceaa18996340683c680851ac16ff43d2e45a227ece97d38d00dab970dc3478b"
+    },
+    {
+      "location": "prepared",
+      "filename": "dots.bin",
+      "bytes": 7892,
+      "sha256": "75e670e04adb27f151492e6692d1a619ef39add21eba23d5195986e66e1aa8f9"
+    },
+    {
+      "location": "prepared",
+      "filename": "image-layers.json",
+      "bytes": 70882,
+      "sha256": "5901e0843f51d17cfda2b0aa9231d9a01398cda2b876e241d0866315c9e88623"
+    },
+    {
+      "location": "prepared",
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diff --git a/src/objects/m83-layers/object.json b/src/objects/m83-layers/object.json
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index 00000000000..f750fc2a2fd
--- /dev/null
+++ b/src/objects/m83-layers/object.json
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+        ],
+        "max": [
+          8.857859069839915,
+          8.67277921317318,
+          6.5924748266097595
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/recipe.json"
+    },
+    "cataloguePoints": [
+      "dots"
+    ],
+    "host": "m83"
+  },
+  "prepared": {
+    "format": "cssearth-image-layer-bank@1",
+    "url": "prepared/image-layers.json"
+  }
+}
diff --git a/src/objects/m83/source/dots/merge.json b/src/objects/m83-layers/source/dots/merge.json
similarity index 100%
rename from src/objects/m83/source/dots/merge.json
rename to src/objects/m83-layers/source/dots/merge.json
diff --git a/src/objects/m83/source/hadfield-wr/points.json b/src/objects/m83-layers/source/hadfield-wr/points.json
similarity index 100%
rename from src/objects/m83/source/hadfield-wr/points.json
rename to src/objects/m83-layers/source/hadfield-wr/points.json
diff --git a/src/objects/m83/source/long-hii/points.json b/src/objects/m83-layers/source/long-hii/points.json
similarity index 100%
rename from src/objects/m83/source/long-hii/points.json
rename to src/objects/m83-layers/source/long-hii/points.json
diff --git a/src/objects/m83-layers/source/manifest.json b/src/objects/m83-layers/source/manifest.json
new file mode 100644
index 00000000000..f90cc4f824d
--- /dev/null
+++ b/src/objects/m83-layers/source/manifest.json
@@ -0,0 +1,197 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "optical",
+      "path": "src/objects/m83-layers/source/source.jpg",
+      "origin": "https://www.eso.org/public/images/m83/",
+      "sourceUrl": "https://www.eso.org/public/images/m83/",
+      "title": "The Southern Pinwheel",
+      "credit": "ESO/IDA/Danish 1.5 m/R. Gendler, S. Guisard and C. Thöne",
+      "displayCredit": "ESO/IDA/Danish 1.5 m/R. Gendler, S. Guisard and C. Thöne",
+      "acquisition": "The publisher Large JPEG (2373 x 2164 px), restored from its origin; not tracked. Registration re-measured against Gaia stars (recipe observation). The hash identifies the local JPEG bytes, not a calibrated scientific array.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-m83",
+            "role": "material",
+            "evidence": "src/objects/m83-layers/source/provenance.json"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "optical",
+      "license": "CC-BY-4.0; retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "unresolved",
+            "label": "Danish 1.54-m B V R",
+            "evidence": "https://www.eso.org/public/images/m83/",
+            "reason": "The publisher's colour composite; the retained record does not identify the individual exposures."
+          }
+        ]
+      }
+    },
+    {
+      "id": "hadfield-wr-table",
+      "path": "src/objects/m83-layers/source/hadfield-wr/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BHCS2005%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F439%2F265%2Ftablea1%22",
+      "title": "A spectroscopic search for the non-nuclear Wolf-Rayet population of the metal-rich spiral galaxy M83, table.csv",
+      "credit": "L. J. Hadfield, P. A. Crowther, H. Schild, W. Schmutz; A&A 439, 265",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through hadfield-wr/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "hadfield-2005-m83-wolf-rayet",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BHCS2005%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F439%2F265%2Ftablea1%22"
+          }
+        ]
+      }
+    },
+    {
+      "id": "long-hii-table",
+      "path": "src/objects/m83-layers/source/long-hii/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F929%2F144%2Fhiireg%22",
+      "title": "Supernova remnants in M83 as observed with MUSE, table.csv",
+      "credit": "K. S. Long, W. P. Blair, P. F. Winkler, L. Della Bruna; ApJ 929, 144",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through long-hii/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "long-2022-m83-hii",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F929%2F144%2Fhiireg%22"
+          }
+        ]
+      }
+    },
+    {
+      "id": "winkler-snr-table",
+      "path": "src/objects/m83-layers/source/winkler-snr/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F943%2F15%2Ftable5%22",
+      "title": "High-resolution spectra of supernova remnants in M83, table.csv",
+      "credit": "P. F. Winkler, K. S. Long, W. P. Blair, S. D. Points; ApJ 943, 15",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through winkler-snr/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "winkler-2023-m83-snr",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F943%2F15%2Ftable5%22"
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "recipe",
+      "path": "src/objects/m83-layers/source/recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Image-layer preparation recipe",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "provenance",
+      "path": "src/objects/m83-layers/source/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Published image interpretation and acquisition record",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "presentation",
+      "path": "src/objects/m83-layers/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Dataset presentation and prepared-bank bindings",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "stellar-extent",
+      "path": "src/objects/m83-layers/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "bell-2025-m83-halo",
+            "role": "reference",
+            "evidence": "https://arxiv.org/abs/2512.11744"
+          }
+        ]
+      }
+    },
+    {
+      "id": "dots-merge",
+      "kind": "authored-document",
+      "path": "src/objects/m83-layers/source/dots/merge.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "hadfield-wr-points",
+      "kind": "authored-document",
+      "path": "src/objects/m83-layers/source/hadfield-wr/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A spectroscopic search for the non-nuclear Wolf-Rayet population of the metal-rich spiral galaxy M83 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "long-hii-points",
+      "kind": "authored-document",
+      "path": "src/objects/m83-layers/source/long-hii/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the Supernova remnants in M83 as observed with MUSE rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "winkler-snr-points",
+      "kind": "authored-document",
+      "path": "src/objects/m83-layers/source/winkler-snr/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the High-resolution spectra of supernova remnants in M83 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/m83/source/presentation.json b/src/objects/m83-layers/source/presentation.json
similarity index 83%
rename from src/objects/m83/source/presentation.json
rename to src/objects/m83-layers/source/presentation.json
index c47a042b457..1b0cface6a1 100644
--- a/src/objects/m83/source/presentation.json
+++ b/src/objects/m83-layers/source/presentation.json
@@ -1,19 +1,19 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m83",
+  "objectId": "m83-layers",
   "name": "Southern Pinwheel (M83)",
   "defaultDataset": "optical",
   "bank": {
-    "path": "src/objects/m83/prepared/image-layers.json"
+    "path": "src/objects/m83-layers/prepared/image-layers.json"
   },
   "recipes": [
     {
       "id": "image-layer-recipe",
-      "path": "src/objects/m83/source/recipe.json"
+      "path": "src/objects/m83-layers/source/recipe.json"
     },
     {
       "id": "source-evidence",
-      "path": "src/objects/m83/source/provenance.json"
+      "path": "src/objects/m83-layers/source/provenance.json"
     }
   ],
   "sharedInputs": [],
@@ -49,7 +49,7 @@
       ],
       "input": "optical",
       "preview": {
-        "path": "src/objects/m83/source/source.jpg",
+        "path": "src/objects/m83-layers/source/source.jpg",
         "url": "https://cdn.eso.org/images/large/m83.jpg"
       }
     }
diff --git a/src/objects/m83/source/provenance.json b/src/objects/m83-layers/source/provenance.json
similarity index 100%
rename from src/objects/m83/source/provenance.json
rename to src/objects/m83-layers/source/provenance.json
diff --git a/src/objects/m83/source/recipe.json b/src/objects/m83-layers/source/recipe.json
similarity index 99%
rename from src/objects/m83/source/recipe.json
rename to src/objects/m83-layers/source/recipe.json
index ec0a664ab2d..91453b09a64 100644
--- a/src/objects/m83/source/recipe.json
+++ b/src/objects/m83-layers/source/recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-image-layer-recipe@1",
-  "id": "m83",
+  "id": "m83-layers",
   "source": {
     "path": "source.jpg",
     "dimensions": [
diff --git a/src/objects/m83/source/stellar-extent.json b/src/objects/m83-layers/source/stellar-extent.json
similarity index 94%
rename from src/objects/m83/source/stellar-extent.json
rename to src/objects/m83-layers/source/stellar-extent.json
index 17c5bf19eb5..7966d909d84 100644
--- a/src/objects/m83/source/stellar-extent.json
+++ b/src/objects/m83-layers/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "m83",
+  "objectId": "m83-layers",
   "radiusPc": 40000,
   "definition": "Projected radius from the M83 centre reached by the Subaru and HST map of its resolved stellar halo.",
   "quote": "with a mass between 15 and 40 kpc",
diff --git a/src/objects/m83/source/winkler-snr/points.json b/src/objects/m83-layers/source/winkler-snr/points.json
similarity index 100%
rename from src/objects/m83/source/winkler-snr/points.json
rename to src/objects/m83-layers/source/winkler-snr/points.json
diff --git a/src/objects/m83/README.md b/src/objects/m83/README.md
index 03626dc12a9..d2da77cb25b 100644
--- a/src/objects/m83/README.md
+++ b/src/objects/m83/README.md
@@ -1,62 +1,16 @@
 # Southern Pinwheel (M83)
 
-A ground-based photograph of M83, cleaned of the Milky Way stars in front of it and colour-tied to its measured
-integrated colour, is spread through a modelled disc. Published catalogues of its supernova remnants, HII regions and
-Wolf-Rayet sources are drawn as dots on the same disc. Image brightness does not measure per-pixel distance.
+Southern Pinwheel (M83) as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Southern Pinwheel (M83) image layers](../m83-layers/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Selected source | Input and meaning |
-| --- | --- |
-| [The Southern Pinwheel](https://www.eso.org/public/images/m83/) | [Record](../../sources/eso-m83.json). The Danish 1.54-metre view in B, V and R, 2373 × 2164 px over 15.60 × 14.23 arcmin (`source/source.jpg`, the Large JPEG, restored from its origin). Found in the WorldWide Telescope image index; the DECam image (noirlab2107a) cuts the disc at the top and bottom, and HAWK-I's (eso0825a) is near-infrared. |
-| [Lundgren et al. (2004)](https://arxiv.org/abs/astro-ph/0404026) | [Record](../../sources/lundgren-2004-m83-molecular-kinematics.json). Table 1: position angle 45° and inclination 24°, the values their CO kinematics of the whole optical disc adopt: the disc the photograph and dots lie on. |
-| [Salo et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/4) | [Record](../../sources/salo-2015-s4g-decompositions.json). S4G's 3.6 µm fit: an exponential disc with scale length 106.75″ (2.53 kpc), 87% of the light; its bulge is a small nuclear one (8%, half-light radius 9.35″ = 0.22 kpc). |
-| [Kregel et al. (2002)](https://arxiv.org/abs/astro-ph/0204154) | [Record](../../sources/kregel-2002-disc-flattening.json). Sect. 4.3: discs are on average 7.3 ± 2.2 times longer than thick, so the 2.53 kpc scale length gives a 347 pc scale height. |
-| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | The 1,297 Gaia DR3 sources within 0.2° of M83's centre that Ren et al.'s criterion marks as Milky Way stars (`source/gaia-dr3-foreground.csv`, restored by the query in the Gaia record). |
-| [RC3](../../sources/rc3-1991.json) | NGC 5236's total B-V, 0.66 ± 0.03 as observed. |
-| [Local Volume Database](../../sources/lvdb-v1-1-1.json) | Centre and distance: distance modulus 28.45 (Tully et al. 2009), 4.90 Mpc. |
-| [Winkler et al. (2023)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/943/15) | [Supernova remnants](source/winkler-snr/points.json): 366 remnants and candidates over the whole galaxy. |
-| [Long et al. (2022)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/929/144) | [HII regions](source/long-hii/points.json): 188 from MUSE fields over the inner disc. |
-| [Hadfield et al. (2005)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/439/265) | [Wolf-Rayet sources](source/hadfield-wr/points.json): the 132 with confirmed Wolf-Rayet signatures. |
-| [Bell et al. (2025)](https://arxiv.org/abs/2512.11744) | [Stellar extent](source/stellar-extent.json): the resolved red-giant halo mapped out to 40 kpc; inside it M83's caption hides. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m83.json) cites the position, distance and velocity that place it.
 
-The catalogue tables are TAP queries of CDS (the query is each descriptor's `table.origin`); they are not tracked.
+## Processing
 
-## The photograph
-
-- **Registration:** the publisher's orientation (1.6° right of vertical) and centre do not match the image: 41 of the 150
-  brightest Gaia stars agree on 0.1° and a centre 67 and 87 px away, with the scale unchanged. Bright stars then fall
-  within 2 px of their images.
-- **Foreground stars:** 69 of the 645 Gaia foreground stars in the image are removed where they show; 301 on the
-  galaxy's light are left, and most of the rest are too faint to show.
-- **Colour:** tied to RC3's B-V of 0.66: red/green 1.162 and blue/green 1.263 against 1.126 and 0.891, so red × 0.969
-  and blue × 0.706 in linear light. The publisher's composite ran blue.
-- **Disc:** inclination 24°, line of nodes 45°, support 9.3 kpc (where the frame stops on its tightest side), 32 slabs
-  with an exponential of 347 pc over ±3 scale heights. No bulge: S4G's nuclear bulge, round on the sky (axis ratio
-  0.897), cannot come from an oblate spheroid seen at 24°, and it holds 8% of the light.
-
-## Dots
-
-| Catalogue | Drawn | Left out |
-| --- | --- | --- |
-| Supernova remnants (Winkler et al. 2023) | 365 | 1 beyond the photograph |
-| HII regions (Long et al. 2022) | 188 | none |
-| Wolf-Rayet sources (Hadfield et al. 2005) | 132 | none |
-
-Dots keep their place in the disc and rise along its axis to heights drawn from the 347 pc layer. Colours are the Milky
-Way's and M31's for each kind; each dot takes its tone from the photograph's brightness under it (never below 15%) and
-moves halfway from its kind's colour to the photograph's colour there.
-
-## Evidence
-
-- In the app: the default view (left) and tilted (right), with the dots.
-  Captured on this branch on 2026-09-29.
-- The prepared bank's `approximation.limitations` records the foreground and colour-tie counts quoted above.
+1. `pnpm prepare:objects --object=m83` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m83` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- [Heald et al. (2016)](https://arxiv.org/abs/1607.03365) fit M83's HI disc at 48°, twice the optical disc's 24°; the outer HI disc is warped and is not
-  modelled.
-- The frame stops at 9.3 kpc, inside the disc's outer arms, its ultraviolet disc and its stellar halo.
-- The HII regions cover the MUSE fields only.
-- Depth is modelled: slabs are the photograph along our sight lines, so side views are approximate.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m83/inventory.json b/src/objects/m83/inventory.json
index ff8f0875a3c..31e85a69b1a 100644
--- a/src/objects/m83/inventory.json
+++ b/src/objects/m83/inventory.json
@@ -3,513 +3,51 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/optical.webp",
+      "filename": "m83-dataset-optical.webp",
       "bytes": 14088,
       "sha256": "7ceaa18996340683c680851ac16ff43d2e45a227ece97d38d00dab970dc3478b"
     },
     {
       "location": "prepared",
-      "filename": "dots.bin",
-      "bytes": 7892,
-      "sha256": "75e670e04adb27f151492e6692d1a619ef39add21eba23d5195986e66e1aa8f9"
+      "filename": "content.json",
+      "bytes": 1362,
+      "sha256": "2ddd6b13affee9a992d1a33790fb1dd9575b281c08e178a9dd9036a0e748a68e"
     },
     {
       "location": "prepared",
-      "filename": "image-layers.json",
-      "bytes": 141868,
-      "sha256": "aecc0437c64ac5bd3b32fdfea17c37148e3da09c34caa533de9c62f2b3ce9834"
+      "filename": "controls.json",
+      "bytes": 448,
+      "sha256": "8e1ce1883d5b3ff26c73b75a132668ed2289de4c4c9969e6c359281cdd19de18"
     },
     {
       "location": "prepared",
-      "filename": "layers/x-04.webp",
-      "bytes": 462,
-      "sha256": "de17290b3fb4f521964d032eda1c99f392e721f121933a3abad7b6a7b6e670c7"
+      "filename": "datasets.json",
+      "bytes": 526,
+      "sha256": "dff19c0c07739fadd1f6496008bd53cd1656d04d58735dd026f7ed355f2edacf"
     },
     {
       "location": "prepared",
-      "filename": "layers/x-05.webp",
-      "bytes": 674,
-      "sha256": "77767fd525661a25728c6d07d6467d2e37d9ddab5821d0edb1f89655be27de76"
+      "filename": "runtime.json",
+      "bytes": 4568,
+      "sha256": "bb156e93d3357cb040c74901a48ab4cc85628efc419406eacf88f401c3c2b44f"
     },
     {
       "location": "prepared",
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diff --git a/src/objects/m83/object.json b/src/objects/m83/object.json
index c13a4295e67..0c1f834ad7e 100644
--- a/src/objects/m83/object.json
+++ b/src/objects/m83/object.json
@@ -1,45 +1,98 @@
 {
   "schema": "cssearth-object@2",
   "id": "m83",
-  "type": "image-layer-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Southern Pinwheel (M83)",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 286968015078697150
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "M83",
+      "systemName": "Galaxy catalogue",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 1010241333000,
+      "description": "A galaxy 4.9 million parsecs away.",
+      "aliases": [
+        "ESO444-081",
+        "NGC5236",
+        "PGC048082",
+        "UGCA366"
+      ],
+      "order": 5147,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
-        -1.194918435451837e+23,
-        -5.3828196039124266e+22,
-        -7.526278704606262e+22
+        -1.1949184389051951e+23,
+        -5.3828196194689734e+22,
+        -7.526278726357485e+22
       ],
-      "localToReferenceXyzw": [
-        0.72685408361818,
-        -0.4697694917678536,
-        -0.2719446318229126,
-        0.4207682057314321
+      "presentationToReference": [
+        -0.833133188888229,
+        0,
+        -0.5530724089781829,
+        -0.5074340142628732,
+        0.3977771559319137,
+        0.7643847561194455,
+        -0.2199995698677538,
+        -0.9174820620691818,
+        0.3314013503884456
       ],
-      "metersPerUnit": 30856775814913670000,
-      "boundsUnits": {
-        "min": [
-          -8.67185989746515,
-          -8.730768220861005,
-          -6.660592379216723
-        ],
-        "max": [
-          8.857859069839915,
-          8.67277921317318,
-          6.5924748266097595
-        ]
-      }
-    },
-    "preparation": {
-      "source": "source/recipe.json"
-    },
-    "cataloguePoints": [
-      "dots"
-    ]
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 925703274447410200,
+      "bodyRadiusM": 286968015078697140000
+    }
   },
   "prepared": {
-    "format": "cssearth-image-layer-bank@1",
-    "url": "prepared/image-layers.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m83/source/content/object.json b/src/objects/m83/source/content/object.json
new file mode 100644
index 00000000000..7d8e17e06f7
--- /dev/null
+++ b/src/objects/m83/source/content/object.json
@@ -0,0 +1,80 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m83",
+  "displayName": "M83",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "4.898 Mpc (\u221267,200 / +68,140 pc)",
+        "source": {
+          "catalogueId": "publication-tully2009aj-138-323t",
+          "url": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T",
+          "label": "Tully2009AJ....138..323T: The Extragalactic Distance Database",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 204.3\u00b0, Dec -29.87\u00b0",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "optical",
+    "controls": [
+      {
+        "id": "optical",
+        "label": "ESO \u00b7 optical",
+        "thumbnail": "m83-dataset-optical.webp",
+        "volume": {
+          "objectId": "m83-layers",
+          "datasetId": "optical",
+          "surface": "optical"
+        },
+        "source": {
+          "id": "m83-layers-optical",
+          "path": "../../m83-layers/source/manifest.json",
+          "url": "https://www.eso.org/public/images/m83/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Tully2009AJ....138..323T: The Extragalactic Distance Database",
+      "href": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+      "href": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T",
+      "credit": "Tully2009AJ....138..323T: The Extragalactic Distance Database"
+    }
+  }
+}
diff --git a/src/objects/m83/source/manifest.json b/src/objects/m83/source/manifest.json
index dfdd225fd04..2e8490e7e0a 100644
--- a/src/objects/m83/source/manifest.json
+++ b/src/objects/m83/source/manifest.json
@@ -1,197 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "optical",
-      "path": "src/objects/m83/source/source.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/m83/",
-      "sourceUrl": "https://www.eso.org/public/images/m83/",
-      "title": "The Southern Pinwheel",
-      "credit": "ESO/IDA/Danish 1.5 m/R. Gendler, S. Guisard and C. Thöne",
-      "displayCredit": "ESO/IDA/Danish 1.5 m/R. Gendler, S. Guisard and C. Thöne",
-      "acquisition": "The publisher Large JPEG (2373 x 2164 px), restored from its origin; not tracked. Registration re-measured against Gaia stars (recipe observation). The hash identifies the local JPEG bytes, not a calibrated scientific array.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-m83",
-            "role": "material",
-            "evidence": "src/objects/m83/source/provenance.json"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "optical",
+      "credit": "ESO/IDA/Danish 1.5 m/R. Gendler, S. Guisard and C. Th\u00f6ne; the default dataset's picture as the Southern Pinwheel (M83) bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0; retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "Danish 1.54-m B V R",
-            "evidence": "https://www.eso.org/public/images/m83/",
-            "reason": "The publisher's colour composite; the retained record does not identify the individual exposures."
-          }
-        ]
-      }
-    },
-    {
-      "id": "hadfield-wr-table",
-      "path": "src/objects/m83/source/hadfield-wr/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BHCS2005%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F439%2F265%2Ftablea1%22",
-      "title": "A spectroscopic search for the non-nuclear Wolf-Rayet population of the metal-rich spiral galaxy M83, table.csv",
-      "credit": "L. J. Hadfield, P. A. Crowther, H. Schild, W. Schmutz; A&A 439, 265",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through hadfield-wr/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "hadfield-2005-m83-wolf-rayet",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BHCS2005%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F439%2F265%2Ftablea1%22"
-          }
-        ]
-      }
-    },
-    {
-      "id": "long-hii-table",
-      "path": "src/objects/m83/source/long-hii/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F929%2F144%2Fhiireg%22",
-      "title": "Supernova remnants in M83 as observed with MUSE, table.csv",
-      "credit": "K. S. Long, W. P. Blair, P. F. Winkler, L. Della Bruna; ApJ 929, 144",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through long-hii/points.json.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "long-2022-m83-hii",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F929%2F144%2Fhiireg%22"
-          }
-        ]
-      }
-    },
-    {
-      "id": "winkler-snr-table",
-      "path": "src/objects/m83/source/winkler-snr/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F943%2F15%2Ftable5%22",
-      "title": "High-resolution spectra of supernova remnants in M83, table.csv",
-      "credit": "P. F. Winkler, K. S. Long, W. P. Blair, S. D. Points; ApJ 943, 15",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through winkler-snr/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "winkler-2023-m83-snr",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F943%2F15%2Ftable5%22"
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m83-layers/source/manifest.json)."
       }
     }
   ],
   "documents": [
     {
-      "id": "recipe",
-      "path": "src/objects/m83/source/recipe.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Image-layer preparation recipe",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "provenance",
-      "path": "src/objects/m83/source/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Published image interpretation and acquisition record",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "presentation",
-      "path": "src/objects/m83/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Dataset presentation and prepared-bank bindings",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "stellar-extent",
-      "path": "src/objects/m83/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "bell-2025-m83-halo",
-            "role": "reference",
-            "evidence": "https://arxiv.org/abs/2512.11744"
-          }
-        ]
-      }
-    },
-    {
-      "id": "dots-merge",
-      "kind": "authored-document",
-      "path": "src/objects/m83/source/dots/merge.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "hadfield-wr-points",
-      "kind": "authored-document",
-      "path": "src/objects/m83/source/hadfield-wr/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A spectroscopic search for the non-nuclear Wolf-Rayet population of the metal-rich spiral galaxy M83 rows drawn as dots.",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "long-hii-points",
-      "kind": "authored-document",
-      "path": "src/objects/m83/source/long-hii/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the Supernova remnants in M83 as observed with MUSE rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "winkler-snr-points",
-      "kind": "authored-document",
-      "path": "src/objects/m83/source/winkler-snr/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the High-resolution spectra of supernova remnants in M83 rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/m83/source/preparation/navigation.json b/src/objects/m83/source/preparation/navigation.json
new file mode 100644
index 00000000000..001202622ce
--- /dev/null
+++ b/src/objects/m83/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m83",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m83/source/presentation/context.png b/src/objects/m83/source/presentation/context.png
new file mode 100644
index 00000000000..1fc5be7136a
Binary files /dev/null and b/src/objects/m83/source/presentation/context.png differ
diff --git a/src/objects/m83/source/presentation/solar-system.json b/src/objects/m83/source/presentation/solar-system.json
new file mode 100644
index 00000000000..69d76df4235
--- /dev/null
+++ b/src/objects/m83/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m83",
+  "displayName": "Southern Pinwheel (M83)",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 2.8696801507869715e+17,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m83/text.json b/src/objects/m83/text.json
new file mode 100644
index 00000000000..65eac0c102b
--- /dev/null
+++ b/src/objects/m83/text.json
@@ -0,0 +1,44 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m83",
+  "card": {
+    "text": "A galaxy 4.9 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-tully2009aj-138-323t",
+        "url": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T",
+        "label": "Tully2009AJ....138..323T: The Extragalactic Distance Database",
+        "checked": "2026-10-01",
+        "locator": "distance: 4.898 Mpc (−67,200 / +68,140 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 4.9 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-tully2009aj-138-323t",
+        "url": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T",
+        "label": "Tully2009AJ....138..323T: The Extragalactic Distance Database",
+        "checked": "2026-10-01",
+        "locator": "distance: 4.898 Mpc (−67,200 / +68,140 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "optical": {
+      "title": "The Southern Pinwheel",
+      "detail": "2373 × 2164 px",
+      "summary": "Visible-light image on an approximate depth model; individual depths are not measured.",
+      "sources": [
+        {
+          "catalogueId": "eso-m83",
+          "url": "https://www.eso.org/public/images/m83/",
+          "label": "The Southern Pinwheel; ESO/IDA/Danish 1.5 m/R. Gendler, S. Guisard and C. Thöne",
+          "checked": "2026-10-01",
+          "locator": "The Southern Pinwheel"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/m87-star/inventory.json b/src/objects/m87-star/inventory.json
index f98df74dc69..d0b77db02be 100644
--- a/src/objects/m87-star/inventory.json
+++ b/src/objects/m87-star/inventory.json
@@ -70,14 +70,14 @@
     {
       "location": "prepared",
       "filename": "controls.json",
-      "bytes": 439,
-      "sha256": "72c5a262c34e61436f93faac353ad0dfe3d214eed82e52a4c224c9d925ff1298"
+      "bytes": 446,
+      "sha256": "8d84d94192bb769d26ddbfb0829ed70f82c25ed4366ee47b4fe762f9a756e421"
     },
     {
       "location": "prepared",
       "filename": "datasets.json",
-      "bytes": 1177,
-      "sha256": "22bec3f7a0541f944411517f43fbd45510d58b89392ec1ed2974938b0ffd4121"
+      "bytes": 1184,
+      "sha256": "8eb81fe6800e98896aae3dbe276d516285e2caf34dd167b9d065d9ac1cb32d85"
     },
     {
       "location": "prepared",
@@ -94,8 +94,8 @@
     {
       "location": "prepared",
       "filename": "runtime.json",
-      "bytes": 248992,
-      "sha256": "a05e6d1b47023c95e5a24c4205965fe01ca78c0d37b8202c38c75780e4f3a3a9"
+      "bytes": 248999,
+      "sha256": "4ad42f68e2b43e148e5ca50a71a6d9729563d7133ad3e3368b31a60609c6b432"
     },
     {
       "location": "prepared",
diff --git a/src/objects/m87-star/source/content/object.json b/src/objects/m87-star/source/content/object.json
index 87c32b1ad97..606d92ed80b 100644
--- a/src/objects/m87-star/source/content/object.json
+++ b/src/objects/m87-star/source/content/object.json
@@ -64,7 +64,7 @@
           "url": "https://arxiv.org/abs/1906.11238"
         },
         "volume": {
-          "objectId": "m87",
+          "objectId": "m87-volume",
           "datasetId": "eso-optical",
           "surface": "shape"
         },
diff --git a/src/objects/m87-volume/README.md b/src/objects/m87-volume/README.md
new file mode 100644
index 00000000000..59f15d0a761
--- /dev/null
+++ b/src/objects/m87-volume/README.md
@@ -0,0 +1,60 @@
+# M87
+
+The giant elliptical galaxy M87, drawn as a volume of starlight around its black hole,
+[M87\*](../m87-star/README.md). A deep photograph, cleaned of the Milky Way stars and neighbouring galaxies, supplies the
+light along every sight line; the depth of that light follows the measured shape of M87's profile. Its globular clusters
+are drawn as dots through the same volume. **Depth is modelled, not measured.**
+
+## Sources
+
+| Selected source | Input and meaning |
+| --- | --- |
+| [The Halo of Galaxy Messier 87](https://www.eso.org/public/images/eso1525a/) | [Record](../../sources/eso-eso1525a.json). Chris Mihos's deep Burrell Schmidt V-band view, 4001 × 4000 px over 96.66 × 96.63 arcmin. One band, tinted by ESO. Found with `telescope explore m87`. |
+| [Kormendy et al. (2009)](https://arxiv.org/abs/0810.1681) | [Record](../../sources/kormendy-2009-virgo-ellipticals.json). Table 3: M87's V-band surface brightness, ellipticity and position angle along the major axis out to 2443.7″. |
+| [RC3](../../sources/rc3-1991.json) | Positions and D25 sizes of the 24 neighbouring galaxies masked in the photograph. |
+| [EHT M87 Paper I](https://arxiv.org/abs/1906.11238) | Distance, 16.8 ± 0.8 Mpc, the same as M87\*'s. Position from SIMBAD (ICRF3). |
+| [Strader et al. (2011)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/197/33) | [Globular clusters and ultra-compact dwarfs](source/strader-gc/points.json): 739 with measured radial velocities. |
+| [Peng et al. (2009)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/703/42) | [Globular clusters](source/peng-gc/points.json): 2,250 in the Hubble ACS field on the centre. |
+
+M87 is not in the Local Volume Database, so its catalogue row is written from its papers (`citedRows` in
+[the Local Group recipe](../local-group/source/catalogue.json)); the Virgo Cluster Catalog classes it a member.
+
+## Method
+
+The Nebula Lab recipe is [labs/nebula/models/m87/experiment.json](../../../labs/nebula/models/m87/experiment.json);
+`node labs/nebula/run.mts prepare-emission` runs it, and [delivery.json](source/delivery.json) places the result.
+
+1. **Stars:** NOX removes the Milky Way stars from the full photograph.
+2. **Neighbours:** the 24 RC3 galaxies inside the 3400 × 3400 px crop are replaced by the light around them, out to three
+   times their D25 radius. Left in, they would be spread through M87.
+3. **Compact leftovers:** each pixel is clamped to the median of the 61 px around it (88″, 7 kpc, about two and a half
+   of the grid's cells), so star haloes and small background galaxies drop out and M87's smooth light stays.
+4. **Depth:** the light along each sight line is spread in depth by the deprojected density (Prugniel & Simien 1997) of a
+   Sérsic fit to Kormendy et al.'s Table 3 profile: n = 11.89, half-light radius 855.5″ (69.7 kpc), fitted here from 8″
+   (outside the core) to 2443.7″. Kormendy et al. give n = 11.8 (+1.8, −1.2) for their own fit to the whole profile. The
+   spheroid's axis is M87's minor axis (position angle 243.2°, from Table 3 at the half-light radius), placed in the plane
+   of the sky, with the measured axis ratio 0.548; no intrinsic axis is measured. It ends at 2.8 half-light radii (195
+   kpc), where the profile stops.
+5. **Dots:** each cluster sits along its sight line at a depth drawn from the same density
+   (`frame.placement: spheroid` in [prepare-catalogue-points](../../../packages/bake/cli/prepare-catalogue-points.mts)).
+
+The Lab's axisymmetric solver was tried first and rejected: it builds shells, which suits hollow nebulae, and on M87's
+smooth light it left concentric rings in every view along the axis.
+
+## Evidence
+
+![M87 in the app](evidence/2026-09-30/views.jpg)
+
+Top: the M87 page, front and two turns. Bottom: the M87\* page from 720,000 light-years, M87\* at the centre, the globular clusters as dots. Captured on this branch on 2026-09-30.
+
+- The volume reproduces the cleaned photograph along every sight line it covers (the method conditions on it); 3–4% of
+  the light lies outside the 195 kpc spheroid and is not drawn.
+- The photograph's registration matches Gaia: 28 stars of G < 12.5 fall within about 1 px (1.5″) of their positions.
+- Tests: `labs/nebula/packages/reconstruction/src/methods/symmetry/shape-prior.test.ts` pins the Sérsic spheroid.
+
+## Known problems
+
+- One smooth spheroid: the halo's asymmetries and tidal features are spread through it like the rest of its light.
+- The colour is ESO's tint of a one-band image.
+- The two globular-cluster catalogues overlap in the centre: a cluster in both is drawn twice.
+- The jet is not drawn.
diff --git a/src/objects/m87/evidence/2026-09-30/views.jpg b/src/objects/m87-volume/evidence/2026-09-30/views.jpg
similarity index 100%
rename from src/objects/m87/evidence/2026-09-30/views.jpg
rename to src/objects/m87-volume/evidence/2026-09-30/views.jpg
diff --git a/src/objects/m87-volume/inventory.json b/src/objects/m87-volume/inventory.json
new file mode 100644
index 00000000000..66787a559ac
--- /dev/null
+++ b/src/objects/m87-volume/inventory.json
@@ -0,0 +1,209 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/eso-optical.webp",
+      "bytes": 33532,
+      "sha256": "6e58f5db5400945a749221bdb6edc2b0fa859fd60f5c3e1d95f995be0b5cfc3c"
+    },
+    {
+      "location": "prepared",
+      "filename": "datasets.json",
+      "bytes": 62695,
+      "sha256": "927031dd1391af25c71925c235eb921c99a88e547b4a89808b85cd47dcf171e9"
+    },
+    {
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+      "filename": "delivery.json",
+      "bytes": 1203,
+      "sha256": "4fa7c13d9e7dacc56cd179366ce3064691ada2cad19e0d808b127af1fdff06ae"
+    },
+    {
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+      "filename": "dots.bin",
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+      "sha256": "7ba2cda47a6a7658960733deb07b436d084e17c1d8ccac4348669c8938931a99"
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+      "filename": "eso-optical/atlases/x.webp",
+      "bytes": 98420,
+      "sha256": "3e3ecd0d56c262cab1d32444e4368c586f730ade6a6429bed7fdcdb6c3f95076"
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+      "bytes": 107828,
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+      "bytes": 150566,
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+    },
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+      "filename": "eso-optical/impostors/view-pn0.png",
+      "bytes": 20922,
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+      "bytes": 26732,
+      "sha256": "83369ac7a7d4e949d2259bbb8ea16b4757385425cac9da79df8a1f614a53c4dd"
+    },
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+      "bytes": 34116,
+      "sha256": "1e7814573a4294af7a4f7e0d6256fda8f2dd0cb110e5ca44ab0d183ec52f07b9"
+    },
+    {
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+      "filename": "eso-optical/impostors/view-ppn.png",
+      "bytes": 40451,
+      "sha256": "3acb1f80b28a435f13a4be1d21968987648eb06e7074c183b10010f2ac7784a7"
+    },
+    {
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+      "filename": "eso-optical/impostors/view-ppp.png",
+      "bytes": 40369,
+      "sha256": "c5f766e7300d0c7e52076cd044b1eef5c8ab5e349a6257e78e58e338bf8225b2"
+    },
+    {
+      "location": "prepared",
+      "filename": "presentation.json",
+      "bytes": 1364,
+      "sha256": "67eba0c45ca9241f85a6b483c7bf2087dff65cdb0db251430d32406ad8fa338a"
+    }
+  ]
+}
diff --git a/src/objects/m87-volume/object.json b/src/objects/m87-volume/object.json
new file mode 100644
index 00000000000..9e555a938a7
--- /dev/null
+++ b/src/objects/m87-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "m87-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        -5.0174573251150825e+23,
+        -6.789157119362013e+22,
+        1.1123902766447065e+23
+      ],
+      "localToReferenceXyzw": [
+        0.4718928501802452,
+        -0.4123410395284899,
+        -0.512767477257921,
+        0.5868232436908718
+      ],
+      "metersPerUnit": 1.238634295408084e+21,
+      "boundsUnits": {
+        "min": [
+          -5,
+          -5,
+          -5
+        ],
+        "max": [
+          5,
+          5,
+          5
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/delivery.json"
+    },
+    "host": "m87"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/m87/source/bake-inputs/references/00-experiment.json b/src/objects/m87-volume/source/bake-inputs/references/00-experiment.json
similarity index 100%
rename from src/objects/m87/source/bake-inputs/references/00-experiment.json
rename to src/objects/m87-volume/source/bake-inputs/references/00-experiment.json
diff --git a/src/objects/m87/source/compact/emission-0.f32.gz b/src/objects/m87-volume/source/compact/emission-0.f32.gz
similarity index 100%
rename from src/objects/m87/source/compact/emission-0.f32.gz
rename to src/objects/m87-volume/source/compact/emission-0.f32.gz
diff --git a/src/objects/m87/source/compact/emission-1.f32.gz b/src/objects/m87-volume/source/compact/emission-1.f32.gz
similarity index 100%
rename from src/objects/m87/source/compact/emission-1.f32.gz
rename to src/objects/m87-volume/source/compact/emission-1.f32.gz
diff --git a/src/objects/m87/source/compact/emission-2.f32.gz b/src/objects/m87-volume/source/compact/emission-2.f32.gz
similarity index 100%
rename from src/objects/m87/source/compact/emission-2.f32.gz
rename to src/objects/m87-volume/source/compact/emission-2.f32.gz
diff --git a/src/objects/m87/source/compact/model.json b/src/objects/m87-volume/source/compact/model.json
similarity index 98%
rename from src/objects/m87/source/compact/model.json
rename to src/objects/m87-volume/source/compact/model.json
index 9c6b146533f..bb5836569c3 100644
--- a/src/objects/m87/source/compact/model.json
+++ b/src/objects/m87-volume/source/compact/model.json
@@ -233,15 +233,15 @@
   },
   "channels": [
     {
-      "path": "src/objects/m87/source/compact/emission-0.f32.gz",
+      "path": "src/objects/m87-volume/source/compact/emission-0.f32.gz",
       "bytes": 13500000
     },
     {
-      "path": "src/objects/m87/source/compact/emission-1.f32.gz",
+      "path": "src/objects/m87-volume/source/compact/emission-1.f32.gz",
       "bytes": 13500000
     },
     {
-      "path": "src/objects/m87/source/compact/emission-2.f32.gz",
+      "path": "src/objects/m87-volume/source/compact/emission-2.f32.gz",
       "bytes": 13500000
     }
   ],
diff --git a/src/objects/m87/source/delivery.json b/src/objects/m87-volume/source/delivery.json
similarity index 92%
rename from src/objects/m87/source/delivery.json
rename to src/objects/m87-volume/source/delivery.json
index dbb9d773114..0a0a6b659c1 100644
--- a/src/objects/m87/source/delivery.json
+++ b/src/objects/m87-volume/source/delivery.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-delivery@2",
-  "id": "m87",
+  "id": "m87-volume",
   "method": "axial-symmetry",
   "request": {
     "path": "labs/nebula/models/m87/experiment.json"
@@ -23,7 +23,7 @@
   "acceptedLabResult": "m87-inferred",
   "symmetryDirectory": ".local/nebula-lab/planetary/m87-inferred",
   "compactInputs": {
-    "path": "src/objects/m87/source/compact/model.json"
+    "path": "src/objects/m87-volume/source/compact/model.json"
   },
   "compactMethod": "symmetry"
 }
diff --git a/src/objects/m87/source/dots/merge.json b/src/objects/m87-volume/source/dots/merge.json
similarity index 100%
rename from src/objects/m87/source/dots/merge.json
rename to src/objects/m87-volume/source/dots/merge.json
diff --git a/src/objects/m87-volume/source/manifest.json b/src/objects/m87-volume/source/manifest.json
new file mode 100644
index 00000000000..215d9adaa46
--- /dev/null
+++ b/src/objects/m87-volume/source/manifest.json
@@ -0,0 +1,175 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "eso-optical",
+      "path": ".local/nebula-lab/planetary/m87-inferred-original.jpg",
+      "origin": "https://www.eso.org/public/images/eso1525a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1525a/",
+      "title": "The Halo of Galaxy Messier 87",
+      "credit": "Chris Mihos (Case Western Reserve University)/ESO",
+      "displayCredit": "Chris Mihos/ESO",
+      "acquisition": "The publisher Large JPEG (4001 x 4000 px), downloaded unchanged by the Nebula Lab recipe (labs/nebula/models/m87/experiment.json) into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1525a",
+            "role": "material",
+            "evidence": "https://www.eso.org/public/images/eso1525a/"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso-optical",
+      "license": "CC-BY-4.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "unresolved",
+            "label": "Burrell Schmidt V",
+            "evidence": "https://www.eso.org/public/images/eso1525a/",
+            "reason": "The publisher's one-band image, tinted; the retained record does not identify the individual exposures."
+          }
+        ]
+      }
+    },
+    {
+      "id": "strader-gc-table",
+      "path": "src/objects/m87-volume/source/strader-gc/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJS%2F197%2F33%2Ftable9%22",
+      "title": "Wide-field precision kinematics of the M87 globular cluster system, table.csv",
+      "credit": "J. Strader, A. J. Romanowsky, J. P. Brodie et al.; ApJS 197, 33",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through strader-gc/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "strader-2011-m87-globular-clusters",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJS%2F197%2F33%2Ftable9%22"
+          }
+        ]
+      }
+    },
+    {
+      "id": "peng-gc-table",
+      "path": "src/objects/m87-volume/source/peng-gc/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BPJB2009%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F703%2F42%2Ftable1%22",
+      "title": "The color-magnitude relation for metal-poor globular clusters in M87, table.csv",
+      "credit": "E. W. Peng, A. Jordán, J. P. Blakeslee et al.; ApJ 703, 42",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through peng-gc/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "peng-2009-m87-globular-clusters",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BPJB2009%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F703%2F42%2Ftable1%22"
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-1",
+      "path": "src/objects/m87-volume/source/delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/m87-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-3",
+      "path": "src/objects/m87-volume/source/replay-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/m87-volume/source/bake-inputs/references/00-experiment.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-5",
+      "path": "src/objects/m87-volume/source/strader-gc/points.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-6",
+      "path": "src/objects/m87-volume/source/peng-gc/points.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-7",
+      "path": "src/objects/m87-volume/source/dots/merge.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-8",
+      "path": "src/objects/m87-volume/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    }
+  ],
+  "generatedIntermediates": [
+    {
+      "id": "compact-compact-emission-0-f32-gz",
+      "path": "src/objects/m87-volume/source/compact/emission-0.f32.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-emission-1-f32-gz",
+      "path": "src/objects/m87-volume/source/compact/emission-1.f32.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-emission-2-f32-gz",
+      "path": "src/objects/m87-volume/source/compact/emission-2.f32.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    },
+    {
+      "id": "compact-compact-model-json",
+      "path": "src/objects/m87-volume/source/compact/model.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+      }
+    }
+  ]
+}
diff --git a/src/objects/m87/source/peng-gc/points.json b/src/objects/m87-volume/source/peng-gc/points.json
similarity index 100%
rename from src/objects/m87/source/peng-gc/points.json
rename to src/objects/m87-volume/source/peng-gc/points.json
diff --git a/src/objects/m87/source/presentation.json b/src/objects/m87-volume/source/presentation.json
similarity index 90%
rename from src/objects/m87/source/presentation.json
rename to src/objects/m87-volume/source/presentation.json
index 44da143ce9a..10b79491a0d 100644
--- a/src/objects/m87/source/presentation.json
+++ b/src/objects/m87-volume/source/presentation.json
@@ -1,10 +1,10 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "m87",
+  "objectId": "m87-volume",
   "name": "M87",
   "defaultDataset": "eso-optical",
   "bank": {
-    "path": "src/objects/m87/prepared/datasets.json"
+    "path": "src/objects/m87-volume/prepared/datasets.json"
   },
   "recipes": [
     {
@@ -13,7 +13,7 @@
     },
     {
       "id": "delivery",
-      "path": "src/objects/m87/source/delivery.json"
+      "path": "src/objects/m87-volume/source/delivery.json"
     }
   ],
   "sharedInputs": [],
diff --git a/src/objects/m87/source/replay-references.json b/src/objects/m87-volume/source/replay-references.json
similarity index 100%
rename from src/objects/m87/source/replay-references.json
rename to src/objects/m87-volume/source/replay-references.json
diff --git a/src/objects/m87/source/stellar-extent.json b/src/objects/m87-volume/source/stellar-extent.json
similarity index 94%
rename from src/objects/m87/source/stellar-extent.json
rename to src/objects/m87-volume/source/stellar-extent.json
index e817963021f..de65c377c72 100644
--- a/src/objects/m87/source/stellar-extent.json
+++ b/src/objects/m87-volume/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "m87",
+  "objectId": "m87-volume",
   "radiusPc": 199000,
   "definition": "Radius along M87's major axis out to which Kormendy et al. (2009) measured its surface brightness: 2443.7 arcsec at 16.8 Mpc.",
   "quote": "2443.700",
diff --git a/src/objects/m87/source/strader-gc/points.json b/src/objects/m87-volume/source/strader-gc/points.json
similarity index 100%
rename from src/objects/m87/source/strader-gc/points.json
rename to src/objects/m87-volume/source/strader-gc/points.json
diff --git a/src/objects/m87/README.md b/src/objects/m87/README.md
index 59f15d0a761..e1ac51b8452 100644
--- a/src/objects/m87/README.md
+++ b/src/objects/m87/README.md
@@ -1,60 +1,16 @@
 # M87
 
-The giant elliptical galaxy M87, drawn as a volume of starlight around its black hole,
-[M87\*](../m87-star/README.md). A deep photograph, cleaned of the Milky Way stars and neighbouring galaxies, supplies the
-light along every sight line; the depth of that light follows the measured shape of M87's profile. Its globular clusters
-are drawn as dots through the same volume. **Depth is modelled, not measured.**
+M87 as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [M87 volume](../m87-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Selected source | Input and meaning |
-| --- | --- |
-| [The Halo of Galaxy Messier 87](https://www.eso.org/public/images/eso1525a/) | [Record](../../sources/eso-eso1525a.json). Chris Mihos's deep Burrell Schmidt V-band view, 4001 × 4000 px over 96.66 × 96.63 arcmin. One band, tinted by ESO. Found with `telescope explore m87`. |
-| [Kormendy et al. (2009)](https://arxiv.org/abs/0810.1681) | [Record](../../sources/kormendy-2009-virgo-ellipticals.json). Table 3: M87's V-band surface brightness, ellipticity and position angle along the major axis out to 2443.7″. |
-| [RC3](../../sources/rc3-1991.json) | Positions and D25 sizes of the 24 neighbouring galaxies masked in the photograph. |
-| [EHT M87 Paper I](https://arxiv.org/abs/1906.11238) | Distance, 16.8 ± 0.8 Mpc, the same as M87\*'s. Position from SIMBAD (ICRF3). |
-| [Strader et al. (2011)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/197/33) | [Globular clusters and ultra-compact dwarfs](source/strader-gc/points.json): 739 with measured radial velocities. |
-| [Peng et al. (2009)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/703/42) | [Globular clusters](source/peng-gc/points.json): 2,250 in the Hubble ACS field on the centre. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/m87.json) cites the position, distance and velocity that place it.
 
-M87 is not in the Local Volume Database, so its catalogue row is written from its papers (`citedRows` in
-[the Local Group recipe](../local-group/source/catalogue.json)); the Virgo Cluster Catalog classes it a member.
+## Processing
 
-## Method
-
-The Nebula Lab recipe is [labs/nebula/models/m87/experiment.json](../../../labs/nebula/models/m87/experiment.json);
-`node labs/nebula/run.mts prepare-emission` runs it, and [delivery.json](source/delivery.json) places the result.
-
-1. **Stars:** NOX removes the Milky Way stars from the full photograph.
-2. **Neighbours:** the 24 RC3 galaxies inside the 3400 × 3400 px crop are replaced by the light around them, out to three
-   times their D25 radius. Left in, they would be spread through M87.
-3. **Compact leftovers:** each pixel is clamped to the median of the 61 px around it (88″, 7 kpc, about two and a half
-   of the grid's cells), so star haloes and small background galaxies drop out and M87's smooth light stays.
-4. **Depth:** the light along each sight line is spread in depth by the deprojected density (Prugniel & Simien 1997) of a
-   Sérsic fit to Kormendy et al.'s Table 3 profile: n = 11.89, half-light radius 855.5″ (69.7 kpc), fitted here from 8″
-   (outside the core) to 2443.7″. Kormendy et al. give n = 11.8 (+1.8, −1.2) for their own fit to the whole profile. The
-   spheroid's axis is M87's minor axis (position angle 243.2°, from Table 3 at the half-light radius), placed in the plane
-   of the sky, with the measured axis ratio 0.548; no intrinsic axis is measured. It ends at 2.8 half-light radii (195
-   kpc), where the profile stops.
-5. **Dots:** each cluster sits along its sight line at a depth drawn from the same density
-   (`frame.placement: spheroid` in [prepare-catalogue-points](../../../packages/bake/cli/prepare-catalogue-points.mts)).
-
-The Lab's axisymmetric solver was tried first and rejected: it builds shells, which suits hollow nebulae, and on M87's
-smooth light it left concentric rings in every view along the axis.
-
-## Evidence
-
-![M87 in the app](evidence/2026-09-30/views.jpg)
-
-Top: the M87 page, front and two turns. Bottom: the M87\* page from 720,000 light-years, M87\* at the centre, the globular clusters as dots. Captured on this branch on 2026-09-30.
-
-- The volume reproduces the cleaned photograph along every sight line it covers (the method conditions on it); 3–4% of
-  the light lies outside the 195 kpc spheroid and is not drawn.
-- The photograph's registration matches Gaia: 28 stars of G < 12.5 fall within about 1 px (1.5″) of their positions.
-- Tests: `labs/nebula/packages/reconstruction/src/methods/symmetry/shape-prior.test.ts` pins the Sérsic spheroid.
+1. `pnpm prepare:objects --object=m87` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts m87` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- One smooth spheroid: the halo's asymmetries and tidal features are spread through it like the rest of its light.
-- The colour is ESO's tint of a one-band image.
-- The two globular-cluster catalogues overlap in the centre: a cluster in both is drawn twice.
-- The jet is not drawn.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/m87/inventory.json b/src/objects/m87/inventory.json
index 6325115c044..b5f7a2eadf9 100644
--- a/src/objects/m87/inventory.json
+++ b/src/objects/m87/inventory.json
@@ -3,207 +3,51 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/eso-optical.webp",
+      "filename": "m87-dataset-eso-optical.webp",
       "bytes": 33532,
       "sha256": "6e58f5db5400945a749221bdb6edc2b0fa859fd60f5c3e1d95f995be0b5cfc3c"
     },
     {
       "location": "prepared",
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-      "bytes": 152963,
-      "sha256": "2800cf90189343c5271bd8ee72c08137428601582f7452d6f6495e979ca061a3"
-    },
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-      "bytes": 1428,
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-    },
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-      "sha256": "7ba2cda47a6a7658960733deb07b436d084e17c1d8ccac4348669c8938931a99"
-    },
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-      "bytes": 40451,
-      "sha256": "3acb1f80b28a435f13a4be1d21968987648eb06e7074c183b10010f2ac7784a7"
+      "filename": "scene.json",
+      "bytes": 3878,
+      "sha256": "2614bfe7b3524a076030b1b1c43d9723f6f3a10c6fccd62a8f11b64a5bdf4bdf"
     },
     {
       "location": "prepared",
-      "filename": "eso-optical/impostors/view-ppp.png",
-      "bytes": 40369,
-      "sha256": "c5f766e7300d0c7e52076cd044b1eef5c8ab5e349a6257e78e58e338bf8225b2"
+      "filename": "text.json",
+      "bytes": 1288,
+      "sha256": "9e7e02c53205a1b219ff5c5d4107704a718473534ffbc1b44922adcf06313c0d"
     },
     {
       "location": "prepared",
-      "filename": "presentation.json",
-      "bytes": 1343,
-      "sha256": "4bce3962e62ec4dd55d723f986403214dc10f37f4d45a2b24473699bf382f29c"
+      "filename": "world-navigation.json",
+      "bytes": 646,
+      "sha256": "78f1d6fc41a56eaf8699cbb1bf97cfcaa9905d1a7723c42f6e77d159447cf933"
     }
   ]
 }
diff --git a/src/objects/m87/object.json b/src/objects/m87/object.json
index 706d032b361..7d281b7ab8d 100644
--- a/src/objects/m87/object.json
+++ b/src/objects/m87/object.json
@@ -1,42 +1,97 @@
 {
   "schema": "cssearth-object@2",
   "id": "m87",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "M87",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 6140498387167821000
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "M87",
+      "systemName": "Galaxy catalogue",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 3465248745000,
+      "description": "A galaxy 16.8 million parsecs away.",
+      "aliases": [
+        "NGC 4486",
+        "Virgo A",
+        "VCC 1316"
+      ],
+      "order": 5148,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
-        -5.0174573251150825e+23,
-        -6.789157119362013e+22,
-        1.1123902766447065e+23
+        -5.017457335350851e+23,
+        -6.789157133212104e+22,
+        1.1123902789140171e+23
       ],
-      "localToReferenceXyzw": [
-        0.4718928501802452,
-        -0.4123410395284899,
-        -0.512767477257921,
-        0.5868232436908718
+      "presentationToReference": [
+        -0.9993541958990894,
+        0,
+        -0.03593314819055807,
+        -0.0329680188985107,
+        0.3977771559319137,
+        0.9168895483909856,
+        -0.014293385490920197,
+        -0.9174820620691818,
+        0.3975202698133643
       ],
-      "metersPerUnit": 1.238634295408084e+21,
-      "boundsUnits": {
-        "min": [
-          -5,
-          -5,
-          -5
-        ],
-        "max": [
-          5,
-          5,
-          5
-        ]
-      }
-    },
-    "preparation": {
-      "source": "source/delivery.json"
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 19808059313444580000,
+      "bodyRadiusM": 6.140498387167821e+21
     }
   },
   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/m87/source/content/object.json b/src/objects/m87/source/content/object.json
new file mode 100644
index 00000000000..e58fda16b81
--- /dev/null
+++ b/src/objects/m87/source/content/object.json
@@ -0,0 +1,97 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "m87",
+  "displayName": "M87",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "16.8 Mpc (\u2212800,000 / +800,000 pc)",
+        "source": {
+          "catalogueId": "arxiv-1906-11238",
+          "url": "https://arxiv.org/abs/1906.11238",
+          "label": "Event Horizon Telescope Collaboration (2019), ApJL 875, L1 (M87 Paper I), Table 1: D = 16.8 +/- 0.8 Mpc, rederived from likelihood distributions in Paper VI.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 187.7\u00b0, Dec 12.39\u00b0",
+        "source": {
+          "catalogueId": "publication-charlot2020a-a-644a-159c",
+          "url": "https://doi.org/10.1051/0004-6361/202038368",
+          "label": "Charlot et al. (2020), A&A 644, A159: ICRF3, the position SIMBAD adopts for M 87.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "membership",
+        "label": "Membership",
+        "value": "Galaxy cluster, Virgo",
+        "source": {
+          "catalogueId": "publication-binggeli1985aj-90-1681b",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/90/1681",
+          "label": "Binggeli, Sandage & Tammann (1985), AJ 90, 1681: the Virgo Cluster Catalog, VCC 1316 = NGC 4486, membership M (member).",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "eso-optical",
+    "controls": [
+      {
+        "id": "eso-optical",
+        "label": "ESO \u00b7 optical",
+        "thumbnail": "m87-dataset-eso-optical.webp",
+        "volume": {
+          "objectId": "m87-volume",
+          "datasetId": "eso-optical",
+          "surface": "eso-optical"
+        },
+        "source": {
+          "id": "m87-volume-eso-optical",
+          "path": "../../m87-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1525a/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Event Horizon Telescope Collaboration (2019), ApJL 875, L1 (M87 Paper I), Table 1: D = 16.8 +/- 0.8 Mpc, rederived from likelihood distributions in Paper VI.",
+      "href": "https://arxiv.org/abs/1906.11238"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Charlot et al. (2020), A&A 644, A159: ICRF3, the position SIMBAD adopts for M 87.",
+      "href": "https://doi.org/10.1051/0004-6361/202038368"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Binggeli, Sandage & Tammann (1985), AJ 90, 1681: the Virgo Cluster Catalog, VCC 1316 = NGC 4486, membership M (member).",
+      "href": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/90/1681"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://arxiv.org/abs/1906.11238",
+      "credit": "Event Horizon Telescope Collaboration (2019), ApJL 875, L1 (M87 Paper I), Table 1: D = 16.8 +/- 0.8 Mpc, rederived from likelihood distributions in Paper VI."
+    }
+  }
+}
diff --git a/src/objects/m87/source/manifest.json b/src/objects/m87/source/manifest.json
index de302927a3f..f60a66a48ab 100644
--- a/src/objects/m87/source/manifest.json
+++ b/src/objects/m87/source/manifest.json
@@ -1,175 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "eso-optical",
-      "path": ".local/nebula-lab/planetary/m87-inferred-original.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/eso1525a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1525a/",
-      "title": "The Halo of Galaxy Messier 87",
-      "credit": "Chris Mihos (Case Western Reserve University)/ESO",
-      "displayCredit": "Chris Mihos/ESO",
-      "acquisition": "The publisher Large JPEG (4001 x 4000 px), downloaded unchanged by the Nebula Lab recipe (labs/nebula/models/m87/experiment.json) into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso1525a",
-            "role": "material",
-            "evidence": "https://www.eso.org/public/images/eso1525a/"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "eso-optical",
+      "credit": "Chris Mihos (Case Western Reserve University)/ESO; the default dataset's picture as the M87 bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "Burrell Schmidt V",
-            "evidence": "https://www.eso.org/public/images/eso1525a/",
-            "reason": "The publisher's one-band image, tinted; the retained record does not identify the individual exposures."
-          }
-        ]
-      }
-    },
-    {
-      "id": "strader-gc-table",
-      "path": "src/objects/m87/source/strader-gc/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJS%2F197%2F33%2Ftable9%22",
-      "title": "Wide-field precision kinematics of the M87 globular cluster system, table.csv",
-      "credit": "J. Strader, A. J. Romanowsky, J. P. Brodie et al.; ApJS 197, 33",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through strader-gc/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "strader-2011-m87-globular-clusters",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJS%2F197%2F33%2Ftable9%22"
-          }
-        ]
-      }
-    },
-    {
-      "id": "peng-gc-table",
-      "path": "src/objects/m87/source/peng-gc/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BPJB2009%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F703%2F42%2Ftable1%22",
-      "title": "The color-magnitude relation for metal-poor globular clusters in M87, table.csv",
-      "credit": "E. W. Peng, A. Jordán, J. P. Blakeslee et al.; ApJ 703, 42",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through peng-gc/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "peng-2009-m87-globular-clusters",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BPJB2009%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FApJ%2F703%2F42%2Ftable1%22"
-          }
-        ]
-      }
-    }
-  ],
-  "documents": [
-    {
-      "id": "document-1",
-      "path": "src/objects/m87/source/delivery.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-2",
-      "path": "src/objects/m87/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-3",
-      "path": "src/objects/m87/source/replay-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-4",
-      "path": "src/objects/m87/source/bake-inputs/references/00-experiment.json",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-5",
-      "path": "src/objects/m87/source/strader-gc/points.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-6",
-      "path": "src/objects/m87/source/peng-gc/points.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-7",
-      "path": "src/objects/m87/source/dots/merge.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-8",
-      "path": "src/objects/m87/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/m87-volume/source/manifest.json)."
       }
     }
   ],
-  "generatedIntermediates": [
-    {
-      "id": "compact-compact-emission-0-f32-gz",
-      "path": "src/objects/m87/source/compact/emission-0.f32.gz",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
-    },
+  "documents": [
     {
-      "id": "compact-compact-emission-1-f32-gz",
-      "path": "src/objects/m87/source/compact/emission-1.f32.gz",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "compact-compact-emission-2-f32-gz",
-      "path": "src/objects/m87/source/compact/emission-2.f32.gz",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "compact-compact-model-json",
-      "path": "src/objects/m87/source/compact/model.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Accepted pre-slice density/emission, material, stars or replay settings. Original published inputs and methods remain bound in this manifest; compact input provenance preserves their processing lineage."
-      }
+      "path": "preparation/navigation.json"
     }
   ]
 }
diff --git a/src/objects/m87/source/preparation/navigation.json b/src/objects/m87/source/preparation/navigation.json
new file mode 100644
index 00000000000..f8f0e25aa57
--- /dev/null
+++ b/src/objects/m87/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "m87",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/m87/source/presentation/context.png b/src/objects/m87/source/presentation/context.png
new file mode 100644
index 00000000000..d5a570488cd
Binary files /dev/null and b/src/objects/m87/source/presentation/context.png differ
diff --git a/src/objects/m87/source/presentation/solar-system.json b/src/objects/m87/source/presentation/solar-system.json
new file mode 100644
index 00000000000..9f3ddae5a15
--- /dev/null
+++ b/src/objects/m87/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "m87",
+  "displayName": "M87",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 6.140498387167821e+18,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/m87/text.json b/src/objects/m87/text.json
new file mode 100644
index 00000000000..12727f2fd2c
--- /dev/null
+++ b/src/objects/m87/text.json
@@ -0,0 +1,44 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "m87",
+  "card": {
+    "text": "A galaxy 16.8 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "arxiv-1906-11238",
+        "url": "https://arxiv.org/abs/1906.11238",
+        "label": "Event Horizon Telescope Collaboration (2019), ApJL 875, L1 (M87 Paper I), Table 1: D = 16.8 +/- 0.8 Mpc, rederived from likelihood distributions in Paper VI.",
+        "checked": "2026-10-01",
+        "locator": "distance: 16.8 Mpc (−800,000 / +800,000 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 16.8 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "arxiv-1906-11238",
+        "url": "https://arxiv.org/abs/1906.11238",
+        "label": "Event Horizon Telescope Collaboration (2019), ApJL 875, L1 (M87 Paper I), Table 1: D = 16.8 +/- 0.8 Mpc, rederived from likelihood distributions in Paper VI.",
+        "checked": "2026-10-01",
+        "locator": "distance: 16.8 Mpc (−800,000 / +800,000 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "eso-optical": {
+      "title": "The halo of M87 in visible light",
+      "detail": "3400 × 3400 px",
+      "summary": "Deep visible-light image on an inferred symmetric volume; depth is not measured.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1525a",
+          "url": "https://www.eso.org/public/images/eso1525a/",
+          "label": "The Halo of Galaxy Messier 87; Chris Mihos (Case Western Reserve University)/ESO",
+          "checked": "2026-10-01",
+          "locator": "The Halo of Galaxy Messier 87"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/ngc-253-layers/README.md b/src/objects/ngc-253-layers/README.md
new file mode 100644
index 00000000000..b494e2991da
--- /dev/null
+++ b/src/objects/ngc-253-layers/README.md
@@ -0,0 +1,64 @@
+# Sculptor Galaxy (NGC 253)
+
+A ground-based photograph of NGC 253, cleaned of the Milky Way stars in front of it and colour-tied to its measured
+integrated colour, is spread through a modelled disc and a round bulge. Published catalogues of its planetary nebulae,
+globular clusters and young star groups are drawn as dots on the same disc. NGC 253 is seen nearly edge-on, so its
+face-on views are modelled more than seen; image brightness does not measure per-pixel distance.
+
+## Sources
+
+| Selected source | Input and meaning |
+| --- | --- |
+| [Spiral galaxy NGC 253](https://www.eso.org/public/images/eso0902c/) | [Record](../../sources/eso-eso0902c.json). The MPG/ESO 2.2-metre WFI view in [O III], V, R and H-alpha, 8285 × 7510 px over 32.87 × 29.79 arcmin (`source/source.jpg`, the Large JPEG, restored from its origin). The same field as eso0902a, which carries an inset drawn over the sky. Found with `telescope explore "ngc 253"`. |
+| [Lucero et al. (2015)](https://arxiv.org/abs/1504.04082) | [Record](../../sources/lucero-2015-ngc253-hi.json). Sect. 5: the H I disc at inclination 76° and position angle 235°, the disc the photograph and dots lie on. |
+| [Salo et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/4) | [Record](../../sources/salo-2015-s4g-decompositions.json). S4G's 3.6 µm bulge-plus-disc fit: a Sérsic bulge (half-light radius 103.93″ = 1.75 kpc, n = 3.872, axis ratio 0.586, PA 66.65°, 28% of the light) and an exponential disc (scale length 185.12″ = 3.11 kpc, axis ratio 0.193, PA 51.29°). |
+| [Kregel et al. (2002)](https://arxiv.org/abs/astro-ph/0204154) | [Record](../../sources/kregel-2002-disc-flattening.json). Sect. 4.3: discs are on average 7.3 ± 2.2 times longer than thick, so the 3.11 kpc scale length gives a 426 pc scale height. |
+| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | The 910 Gaia DR3 sources within 0.38° of the photograph's centre that Ren et al.'s criterion marks as Milky Way stars (`source/gaia-dr3-foreground.csv`, restored by the query in the Gaia record). |
+| [RC3](../../sources/rc3-1991.json) | NGC 253's total B-V, 0.85 ± 0.05 as observed. |
+| [Local Volume Database](../../sources/lvdb-v1-1-1.json) | Centre and distance: distance modulus 27.70 (Radburn-Smith et al. 2011), 3.47 Mpc. |
+| [Congiu et al. (2025)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A125) | [Planetary nebulae](source/congiu-pne/points.json): 571 from MUSE mosaics of the inner disc. |
+| [Cantiello et al. (2018)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/611/A21) | [Globular clusters](source/cantiello-gc/points.json): the 82 of 347 candidates the authors class as bona fide. |
+| [Rodríguez et al. (2018)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/479/961) | [Young star groups](source/rodriguez-groups/points.json): 875 from HST imaging of parts of the disc. |
+| [Bailin et al. (2011)](https://arxiv.org/abs/1105.0005) | [Stellar extent](source/stellar-extent.json): the resolved stellar halo mapped out to 30 kpc; inside it NGC 253's caption hides. |
+
+The catalogue tables are TAP queries of CDS (the query is each descriptor's `table.origin`); they are not tracked.
+
+## The photograph
+
+- **Registration:** the publisher's orientation (1.6° right of vertical) is off by 1.5°: two bright Gaia stars on
+  opposite sides of the galaxy fit at 0.09°, with the centre moved 5 px. Their images then fall within a pixel.
+- **Foreground stars:** 501 of the 574 Gaia foreground stars in the image are removed where they show; 5 on extended
+  light are left.
+- **Colour:** tied to RC3's B-V of 0.85: red/green 1.203 and blue/green 0.952 against 1.251 and 0.815, so red × 1.040 and
+  blue × 0.857 in linear light.
+- **Bulge:** at 76° the photograph's centre is thicker on the sky than S4G's bulge, and a share of it spread through the
+  bulge made a box and a band seen from above. So the bulge takes the fit's own light, scaled to the photograph
+  (`lightFrom: fit`), in an oblate spheroid with intrinsic axis ratio 0.55, fading out between 3 and 6 kpc; the disc
+  keeps the rest. Where the photograph is saturated (11,380 pixels) the fit's light stands in.
+- **Disc:** inclination 76°, line of nodes 55°, support 19.9 kpc (where the frame stops on its tightest side), 32 slabs
+  with an exponential of 426 pc over ±3 scale heights.
+
+## Dots
+
+| Catalogue | Drawn | Left out |
+| --- | --- | --- |
+| Planetary nebulae (Congiu et al. 2025) | 571, 194 of them in the bulge | none |
+| Globular clusters (Cantiello et al. 2018) | 21, 3 of them in the bulge | 61 beyond the photograph |
+| Young star groups (Rodríguez et al. 2018) | 875 | none |
+
+Dots keep their place in the disc and rise along its axis to heights drawn from the 426 pc layer; old objects near the
+centre are bulge members. Colours are the Milky Way's and M31's for each kind; each dot takes its tone from the photograph's brightness under it (never below 15%) and moves halfway from its kind's colour to the photograph's colour there, so dots sit in the galaxy's light instead of on it; flat tints read as dark specks on the bright bulge. Most globular clusters lie in the halo, far off the disc: placed on it they land beyond the photograph.
+
+## Evidence
+
+- Dots from the photograph: the default view (left) and tilted (right), in the app with each dot's tone and colour taken from the photograph. Captured on this branch on 2026-09-29.
+- The prepared bank's `approximation.limitations` records the foreground, colour-tie and saturation counts quoted above.
+- Bytes: 166 layer images, 1.63 MB.
+- Tests: `packages/bake/src/image-layers/bulge.test.mts` pins the bulge model and its fade (`extentKpc.fadeFrom`), on M81's fit.
+
+## Known problems
+
+- Nearly edge-on: seen from above, the disc's light near the minor axis is thin and its outer edge smears; the bar and
+  the starburst wind are not modelled.
+- The planetary nebulae cover the MUSE mosaic and the young groups the HST fields only.
+- Depth is modelled: slabs and bulge are the photograph along our sight lines, so side views are approximate.
diff --git a/src/objects/ngc-253-layers/inventory.json b/src/objects/ngc-253-layers/inventory.json
new file mode 100644
index 00000000000..f5a78aeea12
--- /dev/null
+++ b/src/objects/ngc-253-layers/inventory.json
@@ -0,0 +1,1025 @@
+{
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+      "sha256": "87541d280ae8f369958491d126144946cc5d76007deb14695a64c0ad1bb4c9f0"
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diff --git a/src/objects/ngc-253-layers/object.json b/src/objects/ngc-253-layers/object.json
new file mode 100644
index 00000000000..14d1b8e92a0
--- /dev/null
+++ b/src/objects/ngc-253-layers/object.json
@@ -0,0 +1,46 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "ngc-253-layers",
+  "type": "image-layer-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        9.466398955991882e+22,
+        1.99281255640934e+22,
+        -4.570390386155572e+22
+      ],
+      "localToReferenceXyzw": [
+        0.5322536118875325,
+        0.6559665237048081,
+        0.41558096803764877,
+        0.33720390184011223
+      ],
+      "metersPerUnit": 30856775814913670000,
+      "boundsUnits": {
+        "min": [
+          -15.93923293966862,
+          -11.729666064687265,
+          -78.56474644888249
+        ],
+        "max": [
+          15.855142372222327,
+          11.981418565749985,
+          81.31495831369375
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/recipe.json"
+    },
+    "cataloguePoints": [
+      "dots"
+    ],
+    "host": "ngc-253"
+  },
+  "prepared": {
+    "format": "cssearth-image-layer-bank@1",
+    "url": "prepared/image-layers.json"
+  }
+}
diff --git a/src/objects/ngc-253/source/cantiello-gc/points.json b/src/objects/ngc-253-layers/source/cantiello-gc/points.json
similarity index 100%
rename from src/objects/ngc-253/source/cantiello-gc/points.json
rename to src/objects/ngc-253-layers/source/cantiello-gc/points.json
diff --git a/src/objects/ngc-253/source/congiu-pne/points.json b/src/objects/ngc-253-layers/source/congiu-pne/points.json
similarity index 100%
rename from src/objects/ngc-253/source/congiu-pne/points.json
rename to src/objects/ngc-253-layers/source/congiu-pne/points.json
diff --git a/src/objects/ngc-253/source/dots/merge.json b/src/objects/ngc-253-layers/source/dots/merge.json
similarity index 100%
rename from src/objects/ngc-253/source/dots/merge.json
rename to src/objects/ngc-253-layers/source/dots/merge.json
diff --git a/src/objects/ngc-253-layers/source/manifest.json b/src/objects/ngc-253-layers/source/manifest.json
new file mode 100644
index 00000000000..892f5525be2
--- /dev/null
+++ b/src/objects/ngc-253-layers/source/manifest.json
@@ -0,0 +1,197 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "optical",
+      "path": "src/objects/ngc-253-layers/source/source.jpg",
+      "origin": "https://www.eso.org/public/images/eso0902c/",
+      "sourceUrl": "https://www.eso.org/public/images/eso0902c/",
+      "title": "Spiral galaxy NGC 253",
+      "credit": "ESO",
+      "displayCredit": "ESO",
+      "acquisition": "The publisher Large JPEG (8285 x 7510 px), restored from its origin; not tracked. Registration re-measured against catalogued positions (recipe observation). The hash identifies the local JPEG bytes, not a calibrated scientific array.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso0902c",
+            "role": "material",
+            "evidence": "src/objects/ngc-253-layers/source/provenance.json"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "optical",
+      "license": "CC-BY-4.0; retain the complete recorded credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "unresolved",
+            "label": "WFI [O III] V R H-alpha",
+            "evidence": "https://www.eso.org/public/images/eso0902c/",
+            "reason": "The publisher's colour composite; the retained record does not identify the individual exposures."
+          }
+        ]
+      }
+    },
+    {
+      "id": "cantiello-gc-table",
+      "path": "src/objects/ngc-253-layers/source/cantiello-gc/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F611%2FA21%2Ftable3%22+WHERE+Class+%3D+%27Bona_Fide%27",
+      "title": "A VST and VISTA study of globular clusters in NGC253, table.csv",
+      "credit": "M. Cantiello, A. Grado, M. Rejkuba, M. Arnaboldi; A&A 611, A21",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through cantiello-gc/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "cantiello-2018-ngc253-globular-clusters",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F611%2FA21%2Ftable3%22+WHERE+Class+%3D+%27Bona_Fide%27"
+          }
+        ]
+      }
+    },
+    {
+      "id": "congiu-pne-table",
+      "path": "src/objects/ngc-253-layers/source/congiu-pne/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F700%2FA125%2Fcatalog%22",
+      "title": "The MUSE view of the Sculptor galaxy: survey overview and the luminosity function of planetary nebulae, table.csv",
+      "credit": "E. Congiu, F. Scheuermann, K. Kreckel, A. Leroy; A&A 700, A125",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through congiu-pne/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "congiu-2025-ngc253-pne",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F700%2FA125%2Fcatalog%22"
+          }
+        ]
+      }
+    },
+    {
+      "id": "rodriguez-groups-table",
+      "path": "src/objects/ngc-253-layers/source/rodriguez-groups/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F479%2F961%2Fcatalog%22",
+      "title": "Identification and analysis of the young population in the starburst galaxy NGC 253, table.csv",
+      "credit": "M. J. Rodriguez, G. Baume, C. Feinstein; MNRAS 479, 961",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through rodriguez-groups/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "rodriguez-2018-ngc253-young-groups",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F479%2F961%2Fcatalog%22"
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "recipe",
+      "path": "src/objects/ngc-253-layers/source/recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Image-layer preparation recipe",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "provenance",
+      "path": "src/objects/ngc-253-layers/source/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Published image interpretation and acquisition record",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "presentation",
+      "path": "src/objects/ngc-253-layers/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Dataset presentation and prepared-bank bindings",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "stellar-extent",
+      "path": "src/objects/ngc-253-layers/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "bailin-2011-ngc253-halo",
+            "role": "reference",
+            "evidence": "https://arxiv.org/abs/1105.0005"
+          }
+        ]
+      }
+    },
+    {
+      "id": "cantiello-gc-points",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-253-layers/source/cantiello-gc/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A VST and VISTA study of globular clusters in NGC253 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "congiu-pne-points",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-253-layers/source/congiu-pne/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the The MUSE view of the Sculptor galaxy: survey overview and the luminosity function of planetary nebulae rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "dots-merge",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-253-layers/source/dots/merge.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "rodriguez-groups-points",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-253-layers/source/rodriguez-groups/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the Identification and analysis of the young population in the starburst galaxy NGC 253 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/ngc-253/source/presentation.json b/src/objects/ngc-253-layers/source/presentation.json
similarity index 87%
rename from src/objects/ngc-253/source/presentation.json
rename to src/objects/ngc-253-layers/source/presentation.json
index b451baaa1b7..83f7e48bdf5 100644
--- a/src/objects/ngc-253/source/presentation.json
+++ b/src/objects/ngc-253-layers/source/presentation.json
@@ -1,19 +1,19 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "ngc-253",
+  "objectId": "ngc-253-layers",
   "name": "Sculptor Galaxy (NGC 253)",
   "defaultDataset": "optical",
   "bank": {
-    "path": "src/objects/ngc-253/prepared/image-layers.json"
+    "path": "src/objects/ngc-253-layers/prepared/image-layers.json"
   },
   "recipes": [
     {
       "id": "image-layer-recipe",
-      "path": "src/objects/ngc-253/source/recipe.json"
+      "path": "src/objects/ngc-253-layers/source/recipe.json"
     },
     {
       "id": "source-evidence",
-      "path": "src/objects/ngc-253/source/provenance.json"
+      "path": "src/objects/ngc-253-layers/source/provenance.json"
     }
   ],
   "sharedInputs": [],
diff --git a/src/objects/ngc-253/source/provenance.json b/src/objects/ngc-253-layers/source/provenance.json
similarity index 100%
rename from src/objects/ngc-253/source/provenance.json
rename to src/objects/ngc-253-layers/source/provenance.json
diff --git a/src/objects/ngc-253/source/recipe.json b/src/objects/ngc-253-layers/source/recipe.json
similarity index 99%
rename from src/objects/ngc-253/source/recipe.json
rename to src/objects/ngc-253-layers/source/recipe.json
index 7157c3acc69..c9e8770ed19 100644
--- a/src/objects/ngc-253/source/recipe.json
+++ b/src/objects/ngc-253-layers/source/recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-image-layer-recipe@1",
-  "id": "ngc-253",
+  "id": "ngc-253-layers",
   "source": {
     "path": "source.jpg",
     "dimensions": [
diff --git a/src/objects/ngc-253/source/rodriguez-groups/points.json b/src/objects/ngc-253-layers/source/rodriguez-groups/points.json
similarity index 100%
rename from src/objects/ngc-253/source/rodriguez-groups/points.json
rename to src/objects/ngc-253-layers/source/rodriguez-groups/points.json
diff --git a/src/objects/ngc-253/source/stellar-extent.json b/src/objects/ngc-253-layers/source/stellar-extent.json
similarity index 94%
rename from src/objects/ngc-253/source/stellar-extent.json
rename to src/objects/ngc-253-layers/source/stellar-extent.json
index 6f82d3612b7..eec7c572285 100644
--- a/src/objects/ngc-253/source/stellar-extent.json
+++ b/src/objects/ngc-253-layers/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "ngc-253",
+  "objectId": "ngc-253-layers",
   "radiusPc": 30000,
   "definition": "Projected radius from the NGC 253 centre reached by the Magellan/IMACS map of its resolved stellar halo.",
   "quote": "reaching out to distances of 30 kpc from the center of the galaxy",
diff --git a/src/objects/ngc-253/README.md b/src/objects/ngc-253/README.md
index b494e2991da..d3c452b2b99 100644
--- a/src/objects/ngc-253/README.md
+++ b/src/objects/ngc-253/README.md
@@ -1,64 +1,16 @@
 # Sculptor Galaxy (NGC 253)
 
-A ground-based photograph of NGC 253, cleaned of the Milky Way stars in front of it and colour-tied to its measured
-integrated colour, is spread through a modelled disc and a round bulge. Published catalogues of its planetary nebulae,
-globular clusters and young star groups are drawn as dots on the same disc. NGC 253 is seen nearly edge-on, so its
-face-on views are modelled more than seen; image brightness does not measure per-pixel distance.
+Sculptor Galaxy (NGC 253) as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Sculptor Galaxy (NGC 253) image layers](../ngc-253-layers/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Selected source | Input and meaning |
-| --- | --- |
-| [Spiral galaxy NGC 253](https://www.eso.org/public/images/eso0902c/) | [Record](../../sources/eso-eso0902c.json). The MPG/ESO 2.2-metre WFI view in [O III], V, R and H-alpha, 8285 × 7510 px over 32.87 × 29.79 arcmin (`source/source.jpg`, the Large JPEG, restored from its origin). The same field as eso0902a, which carries an inset drawn over the sky. Found with `telescope explore "ngc 253"`. |
-| [Lucero et al. (2015)](https://arxiv.org/abs/1504.04082) | [Record](../../sources/lucero-2015-ngc253-hi.json). Sect. 5: the H I disc at inclination 76° and position angle 235°, the disc the photograph and dots lie on. |
-| [Salo et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/4) | [Record](../../sources/salo-2015-s4g-decompositions.json). S4G's 3.6 µm bulge-plus-disc fit: a Sérsic bulge (half-light radius 103.93″ = 1.75 kpc, n = 3.872, axis ratio 0.586, PA 66.65°, 28% of the light) and an exponential disc (scale length 185.12″ = 3.11 kpc, axis ratio 0.193, PA 51.29°). |
-| [Kregel et al. (2002)](https://arxiv.org/abs/astro-ph/0204154) | [Record](../../sources/kregel-2002-disc-flattening.json). Sect. 4.3: discs are on average 7.3 ± 2.2 times longer than thick, so the 3.11 kpc scale length gives a 426 pc scale height. |
-| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | The 910 Gaia DR3 sources within 0.38° of the photograph's centre that Ren et al.'s criterion marks as Milky Way stars (`source/gaia-dr3-foreground.csv`, restored by the query in the Gaia record). |
-| [RC3](../../sources/rc3-1991.json) | NGC 253's total B-V, 0.85 ± 0.05 as observed. |
-| [Local Volume Database](../../sources/lvdb-v1-1-1.json) | Centre and distance: distance modulus 27.70 (Radburn-Smith et al. 2011), 3.47 Mpc. |
-| [Congiu et al. (2025)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/700/A125) | [Planetary nebulae](source/congiu-pne/points.json): 571 from MUSE mosaics of the inner disc. |
-| [Cantiello et al. (2018)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/611/A21) | [Globular clusters](source/cantiello-gc/points.json): the 82 of 347 candidates the authors class as bona fide. |
-| [Rodríguez et al. (2018)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/479/961) | [Young star groups](source/rodriguez-groups/points.json): 875 from HST imaging of parts of the disc. |
-| [Bailin et al. (2011)](https://arxiv.org/abs/1105.0005) | [Stellar extent](source/stellar-extent.json): the resolved stellar halo mapped out to 30 kpc; inside it NGC 253's caption hides. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/ngc-253.json) cites the position, distance and velocity that place it.
 
-The catalogue tables are TAP queries of CDS (the query is each descriptor's `table.origin`); they are not tracked.
+## Processing
 
-## The photograph
-
-- **Registration:** the publisher's orientation (1.6° right of vertical) is off by 1.5°: two bright Gaia stars on
-  opposite sides of the galaxy fit at 0.09°, with the centre moved 5 px. Their images then fall within a pixel.
-- **Foreground stars:** 501 of the 574 Gaia foreground stars in the image are removed where they show; 5 on extended
-  light are left.
-- **Colour:** tied to RC3's B-V of 0.85: red/green 1.203 and blue/green 0.952 against 1.251 and 0.815, so red × 1.040 and
-  blue × 0.857 in linear light.
-- **Bulge:** at 76° the photograph's centre is thicker on the sky than S4G's bulge, and a share of it spread through the
-  bulge made a box and a band seen from above. So the bulge takes the fit's own light, scaled to the photograph
-  (`lightFrom: fit`), in an oblate spheroid with intrinsic axis ratio 0.55, fading out between 3 and 6 kpc; the disc
-  keeps the rest. Where the photograph is saturated (11,380 pixels) the fit's light stands in.
-- **Disc:** inclination 76°, line of nodes 55°, support 19.9 kpc (where the frame stops on its tightest side), 32 slabs
-  with an exponential of 426 pc over ±3 scale heights.
-
-## Dots
-
-| Catalogue | Drawn | Left out |
-| --- | --- | --- |
-| Planetary nebulae (Congiu et al. 2025) | 571, 194 of them in the bulge | none |
-| Globular clusters (Cantiello et al. 2018) | 21, 3 of them in the bulge | 61 beyond the photograph |
-| Young star groups (Rodríguez et al. 2018) | 875 | none |
-
-Dots keep their place in the disc and rise along its axis to heights drawn from the 426 pc layer; old objects near the
-centre are bulge members. Colours are the Milky Way's and M31's for each kind; each dot takes its tone from the photograph's brightness under it (never below 15%) and moves halfway from its kind's colour to the photograph's colour there, so dots sit in the galaxy's light instead of on it; flat tints read as dark specks on the bright bulge. Most globular clusters lie in the halo, far off the disc: placed on it they land beyond the photograph.
-
-## Evidence
-
-- Dots from the photograph: the default view (left) and tilted (right), in the app with each dot's tone and colour taken from the photograph. Captured on this branch on 2026-09-29.
-- The prepared bank's `approximation.limitations` records the foreground, colour-tie and saturation counts quoted above.
-- Bytes: 166 layer images, 1.63 MB.
-- Tests: `packages/bake/src/image-layers/bulge.test.mts` pins the bulge model and its fade (`extentKpc.fadeFrom`), on M81's fit.
+1. `pnpm prepare:objects --object=ngc-253` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts ngc-253` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- Nearly edge-on: seen from above, the disc's light near the minor axis is thin and its outer edge smears; the bar and
-  the starburst wind are not modelled.
-- The planetary nebulae cover the MUSE mosaic and the young groups the HST fields only.
-- Depth is modelled: slabs and bulge are the photograph along our sight lines, so side views are approximate.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/ngc-253/inventory.json b/src/objects/ngc-253/inventory.json
index e45164bec19..3c85db4dac4 100644
--- a/src/objects/ngc-253/inventory.json
+++ b/src/objects/ngc-253/inventory.json
@@ -3,1023 +3,51 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/optical.webp",
+      "filename": "ngc-253-dataset-optical.webp",
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       "sha256": "397d5800500094a72782430a19fcb0a0a012a828bf8b1ba9825305d150ada30f"
     },
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-      "bytes": 14808,
-      "sha256": "87541d280ae8f369958491d126144946cc5d76007deb14695a64c0ad1bb4c9f0"
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-      "bytes": 287205,
-      "sha256": "c86ab38255760da673f45bebd8844cea19dc240ba802569952c061472ddbeebe"
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diff --git a/src/objects/ngc-253/object.json b/src/objects/ngc-253/object.json
index f90ecba9c7f..3a78a9f9b60 100644
--- a/src/objects/ngc-253/object.json
+++ b/src/objects/ngc-253/object.json
@@ -1,45 +1,97 @@
 {
   "schema": "cssearth-object@2",
   "id": "ngc-253",
-  "type": "image-layer-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Sculptor Galaxy (NGC 253)",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 614049838716782100
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "NGC 253",
+      "systemName": "Galaxy catalogue",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 715196092800,
+      "description": "A galaxy 3.5 million parsecs away.",
+      "aliases": [
+        "ESO474-029",
+        "PGC002789",
+        "UGCA013"
+      ],
+      "order": 5149,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
-        9.466398955991882e+22,
-        1.99281255640934e+22,
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+        9.466398987631915e+22,
+        1.9928125630700205e+22,
+        -4.570390401431424e+22
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-        0.5322536118875325,
-        0.6559665237048081,
-        0.41558096803764877,
-        0.33720390184011223
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+        0.0010957575408784143,
+        0.0010053378881329802,
+        0.3977771559319137,
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-    "preparation": {
-      "source": "source/recipe.json"
-    },
-    "cataloguePoints": [
-      "dots"
-    ]
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 1980805931344458500,
+      "bodyRadiusM": 614049838716782100000
+    }
   },
   "prepared": {
-    "format": "cssearth-image-layer-bank@1",
-    "url": "prepared/image-layers.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/ngc-253/source/content/object.json b/src/objects/ngc-253/source/content/object.json
new file mode 100644
index 00000000000..53d3a21116f
--- /dev/null
+++ b/src/objects/ngc-253/source/content/object.json
@@ -0,0 +1,80 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "ngc-253",
+  "displayName": "NGC 253",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "3.467 Mpc (\u2212110,000 / +113,600 pc)",
+        "source": {
+          "catalogueId": "publication-radburnsmith2011apjs-195-18r",
+          "url": "https://ui.adsabs.harvard.edu/abs/2011ApJS..195...18R",
+          "label": "RadburnSmith2011ApJS..195...18R: The GHOSTS Survey. I. Hubble Space Telescope Advanced Camera for Surveys Data",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 11.89\u00b0, Dec -25.29\u00b0",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "optical",
+    "controls": [
+      {
+        "id": "optical",
+        "label": "ESO \u00b7 optical",
+        "thumbnail": "ngc-253-dataset-optical.webp",
+        "volume": {
+          "objectId": "ngc-253-layers",
+          "datasetId": "optical",
+          "surface": "optical"
+        },
+        "source": {
+          "id": "ngc-253-layers-optical",
+          "path": "../../ngc-253-layers/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso0902c/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "RadburnSmith2011ApJS..195...18R: The GHOSTS Survey. I. Hubble Space Telescope Advanced Camera for Surveys Data",
+      "href": "https://ui.adsabs.harvard.edu/abs/2011ApJS..195...18R"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+      "href": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://ui.adsabs.harvard.edu/abs/2011ApJS..195...18R",
+      "credit": "RadburnSmith2011ApJS..195...18R: The GHOSTS Survey. I. Hubble Space Telescope Advanced Camera for Surveys Data"
+    }
+  }
+}
diff --git a/src/objects/ngc-253/source/manifest.json b/src/objects/ngc-253/source/manifest.json
index f6ae2b697c6..d47d057a9f1 100644
--- a/src/objects/ngc-253/source/manifest.json
+++ b/src/objects/ngc-253/source/manifest.json
@@ -1,197 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "optical",
-      "path": "src/objects/ngc-253/source/source.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/eso0902c/",
-      "sourceUrl": "https://www.eso.org/public/images/eso0902c/",
-      "title": "Spiral galaxy NGC 253",
-      "credit": "ESO",
-      "displayCredit": "ESO",
-      "acquisition": "The publisher Large JPEG (8285 x 7510 px), restored from its origin; not tracked. Registration re-measured against catalogued positions (recipe observation). The hash identifies the local JPEG bytes, not a calibrated scientific array.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso0902c",
-            "role": "material",
-            "evidence": "src/objects/ngc-253/source/provenance.json"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "optical",
+      "credit": "ESO; the default dataset's picture as the Sculptor Galaxy (NGC 253) bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0; retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "WFI [O III] V R H-alpha",
-            "evidence": "https://www.eso.org/public/images/eso0902c/",
-            "reason": "The publisher's colour composite; the retained record does not identify the individual exposures."
-          }
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-      "path": "src/objects/ngc-253/source/cantiello-gc/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F611%2FA21%2Ftable3%22+WHERE+Class+%3D+%27Bona_Fide%27",
-      "title": "A VST and VISTA study of globular clusters in NGC253, table.csv",
-      "credit": "M. Cantiello, A. Grado, M. Rejkuba, M. Arnaboldi; A&A 611, A21",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through cantiello-gc/points.json.",
-      "sourceBinding": {
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-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+ID%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F700%2FA125%2Fcatalog%22",
-      "title": "The MUSE view of the Sculptor galaxy: survey overview and the luminosity function of planetary nebulae, table.csv",
-      "credit": "E. Congiu, F. Scheuermann, K. Kreckel, A. Leroy; A&A 700, A125",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through congiu-pne/points.json.",
+      "consumers": [
+        "navigation"
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+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
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-      "path": "src/objects/ngc-253/source/rodriguez-groups/table.csv",
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-      "title": "Identification and analysis of the young population in the starburst galaxy NGC 253, table.csv",
-      "credit": "M. J. Rodriguez, G. Baume, C. Feinstein; MNRAS 479, 961",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through rodriguez-groups/points.json.",
-      "sourceBinding": {
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-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/ngc-253-layers/source/manifest.json)."
       }
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   ],
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-    {
-      "id": "stellar-extent",
-      "path": "src/objects/ngc-253/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "bailin-2011-ngc253-halo",
-            "role": "reference",
-            "evidence": "https://arxiv.org/abs/1105.0005"
-          }
-        ]
-      }
-    },
-    {
-      "id": "cantiello-gc-points",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-253/source/cantiello-gc/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A VST and VISTA study of globular clusters in NGC253 rows drawn as dots.",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "congiu-pne-points",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-253/source/congiu-pne/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the The MUSE view of the Sculptor galaxy: survey overview and the luminosity function of planetary nebulae rows drawn as dots.",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "dots-merge",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-253/source/dots/merge.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "rodriguez-groups-points",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-253/source/rodriguez-groups/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the Identification and analysis of the young population in the starburst galaxy NGC 253 rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/ngc-253/source/preparation/navigation.json b/src/objects/ngc-253/source/preparation/navigation.json
new file mode 100644
index 00000000000..ff25bab6f50
--- /dev/null
+++ b/src/objects/ngc-253/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "ngc-253",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/ngc-253/source/presentation/context.png b/src/objects/ngc-253/source/presentation/context.png
new file mode 100644
index 00000000000..843bea3369c
Binary files /dev/null and b/src/objects/ngc-253/source/presentation/context.png differ
diff --git a/src/objects/ngc-253/source/presentation/solar-system.json b/src/objects/ngc-253/source/presentation/solar-system.json
new file mode 100644
index 00000000000..1dde64f5265
--- /dev/null
+++ b/src/objects/ngc-253/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "ngc-253",
+  "displayName": "Sculptor Galaxy (NGC 253)",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 6.140498387167821e+17,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/ngc-253/text.json b/src/objects/ngc-253/text.json
new file mode 100644
index 00000000000..0b26b89fa19
--- /dev/null
+++ b/src/objects/ngc-253/text.json
@@ -0,0 +1,44 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "ngc-253",
+  "card": {
+    "text": "A galaxy 3.5 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-radburnsmith2011apjs-195-18r",
+        "url": "https://ui.adsabs.harvard.edu/abs/2011ApJS..195...18R",
+        "label": "RadburnSmith2011ApJS..195...18R: The GHOSTS Survey. I. Hubble Space Telescope Advanced Camera for Surveys Data",
+        "checked": "2026-10-01",
+        "locator": "distance: 3.467 Mpc (−110,000 / +113,600 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 3.5 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-radburnsmith2011apjs-195-18r",
+        "url": "https://ui.adsabs.harvard.edu/abs/2011ApJS..195...18R",
+        "label": "RadburnSmith2011ApJS..195...18R: The GHOSTS Survey. I. Hubble Space Telescope Advanced Camera for Surveys Data",
+        "checked": "2026-10-01",
+        "locator": "distance: 3.467 Mpc (−110,000 / +113,600 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "optical": {
+      "title": "Spiral galaxy NGC 253",
+      "detail": "8285 × 7510 px",
+      "summary": "Visible-light image on an approximate depth model with a round bulge; individual depths are not measured.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso0902c",
+          "url": "https://www.eso.org/public/images/eso0902c/",
+          "label": "Spiral galaxy NGC 253; ESO",
+          "checked": "2026-10-01",
+          "locator": "Spiral galaxy NGC 253"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/ngc-300-layers/README.md b/src/objects/ngc-300-layers/README.md
new file mode 100644
index 00000000000..f2c3ed790f5
--- /dev/null
+++ b/src/objects/ngc-300-layers/README.md
@@ -0,0 +1,64 @@
+# NGC 300
+
+A ground-based photograph of NGC 300, cleaned of the Milky Way stars in front of it and colour-tied to its measured
+integrated colour, is spread through a modelled disc. Published catalogues of its planetary nebulae, HII regions,
+Cepheids, OB associations and supernova remnants are drawn as dots on the same disc. Image brightness does not measure
+per-pixel distance.
+
+## Sources
+
+| Selected source | Input and meaning |
+| --- | --- |
+| [Spiral galaxy NGC 300](https://www.eso.org/public/images/eso1037a/) | [Record](../../sources/eso-eso1037a.json). The MPG/ESO 2.2-metre WFI view in B, [O III], V, R and H-alpha, 7603 × 7603 px over 30.22 × 30.22 arcmin (`source/source.jpg`, the Large JPEG, restored from its origin). Found in the WorldWide Telescope image index. |
+| [Westmeier et al. (2011)](https://arxiv.org/abs/1009.0317) | [Record](../../sources/westmeier-2011-ngc300-hi.json). Table 1: the inner HI disc at position angle 290°; Sect. 4: a geometric inclination of about 44°, consistent with their tilted rings (40° to 50°): the disc the photograph and dots lie on. |
+| [Salo et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/4) | [Record](../../sources/salo-2015-s4g-decompositions.json). S4G's 3.6 µm fit: a single exponential disc with scale length 152.16″ (1.54 kpc), no bulge. |
+| [Kregel et al. (2002)](https://arxiv.org/abs/astro-ph/0204154) | [Record](../../sources/kregel-2002-disc-flattening.json). Sect. 4.3: discs are on average 7.3 ± 2.2 times longer than thick, so the 1.54 kpc scale length gives a 211 pc scale height. |
+| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | The 1,027 Gaia DR3 sources within 0.38° of NGC 300's centre that Ren et al.'s criterion marks as Milky Way stars (`source/gaia-dr3-foreground.csv`, restored by the query in the Gaia record). |
+| [RC3](../../sources/rc3-1991.json) | NGC 300's total B-V, 0.59 ± 0.03 as observed. |
+| [Local Volume Database](../../sources/lvdb-v1-1-1.json) | Centre and distance: distance modulus 26.6 (Tully et al. 2009), 2.09 Mpc. |
+| [Peña et al. (2012)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/547/A78) | [Planetary nebulae](source/pena-pne/points.json): 101 of their 112, leaving out the rows they mark as compact HII regions, very uncertain or indefinite. |
+| [Soffner et al. (1996)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/306/9) | [HII regions](source/soffner-hii/points.json): 90 in their three fields. |
+| [Pietrzyński et al. (2002)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/123/789) | [Cepheids](source/pietrzynski-cepheids/points.json): 117 with periods. |
+| [Pietrzyński et al. (2001)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/371/497) | [OB associations](source/pietrzynski-ob/points.json): 117 candidates. |
+| [Vučetić et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/943) | [Supernova remnants](source/vucetic-snr/points.json): 22 optically identified remnants. |
+| [Bland-Hawthorn et al. (2005)](https://arxiv.org/abs/astro-ph/0503488) | [Stellar extent](source/stellar-extent.json): star counts trace the disc to 24′, about 14.4 kpc at their 2.0 Mpc, with no truncation; inside it NGC 300's caption hides. |
+
+The catalogue tables are TAP queries of CDS (the query is each descriptor's `table.origin`); they are not tracked.
+
+## The photograph
+
+- **Registration:** the publisher's stated centre is 28 px from the image's: bright Gaia stars all sat 28 px to one side.
+  With the centre moved, they fall within a few pixels of their images; the stated orientation fits.
+- **Foreground stars:** 145 of the 567 Gaia foreground stars in the image are removed where they show; 125 on the
+  galaxy's light are left, and most of the rest are too faint to show at the 3000 px face size.
+- **Colour:** tied to RC3's B-V of 0.59: red/green 1.099 and blue/green 1.183 against 1.085 and 0.919, so red × 0.987
+  and blue × 0.777 in linear light. The publisher's composite ran blue.
+- **Disc:** inclination 44°, line of nodes 110°, support 9.4 kpc (where the frame stops on its tightest side), 32 slabs
+  with an exponential of 211 pc over ±3 scale heights. No bulge: S4G fits NGC 300 with a disc alone.
+
+## Dots
+
+| Catalogue | Drawn | Left out |
+| --- | --- | --- |
+| Planetary nebulae (Peña et al. 2012) | 101 | 11 rows the authors flag |
+| HII regions (Soffner et al. 1996) | 90 | none |
+| Cepheids (Pietrzyński et al. 2002) | 115 | 2 beyond the photograph |
+| OB associations (Pietrzyński et al. 2001) | 117 | none |
+| Supernova remnants (Vučetić et al. 2015) | 22 | none |
+
+Dots keep their place in the disc and rise along its axis to heights drawn from the 211 pc layer. Colours are the Milky
+Way's and M31's for each kind; each dot takes its tone from the photograph's brightness under it (never below 15%) and
+moves halfway from its kind's colour to the photograph's colour there.
+
+## Evidence
+
+- In the app: the default view (left) and tilted (right), with the dots.
+  Captured on this branch on 2026-09-29.
+- The prepared bank's `approximation.limitations` records the foreground and colour-tie counts quoted above.
+
+## Known problems
+
+- Westmeier et al.'s HI disc twists by about 40° beyond 10 arcmin; only the inner disc's orientation is used.
+- The frame stops at 9.4 kpc, inside the 14.4 kpc to which the stars are traced.
+- Soffner et al.'s HII regions cover three fields only.
+- Depth is modelled: slabs are the photograph along our sight lines, so side views are approximate.
diff --git a/src/objects/ngc-300-layers/inventory.json b/src/objects/ngc-300-layers/inventory.json
new file mode 100644
index 00000000000..66edac0ef9d
--- /dev/null
+++ b/src/objects/ngc-300-layers/inventory.json
@@ -0,0 +1,539 @@
+{
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+  "assets": [
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+      "location": "public",
+      "filename": "datasets/optical.webp",
+      "bytes": 15188,
+      "sha256": "0ed77e15491e63b596c389d65125d52812c4a96b5c7f2b94bcc5606623f2de95"
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diff --git a/src/objects/ngc-300-layers/object.json b/src/objects/ngc-300-layers/object.json
new file mode 100644
index 00000000000..79a497cce45
--- /dev/null
+++ b/src/objects/ngc-300-layers/object.json
@@ -0,0 +1,46 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "ngc-300-layers",
+  "type": "image-layer-bank",
+  "properties": {
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+    "preparation": {
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+    "host": "ngc-300"
+  },
+  "prepared": {
+    "format": "cssearth-image-layer-bank@1",
+    "url": "prepared/image-layers.json"
+  }
+}
diff --git a/src/objects/ngc-300/source/dots/merge.json b/src/objects/ngc-300-layers/source/dots/merge.json
similarity index 100%
rename from src/objects/ngc-300/source/dots/merge.json
rename to src/objects/ngc-300-layers/source/dots/merge.json
diff --git a/src/objects/ngc-300-layers/source/manifest.json b/src/objects/ngc-300-layers/source/manifest.json
new file mode 100644
index 00000000000..8d507d725a0
--- /dev/null
+++ b/src/objects/ngc-300-layers/source/manifest.json
@@ -0,0 +1,257 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
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+      "origin": "https://www.eso.org/public/images/eso1037a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1037a/",
+      "title": "Spiral galaxy NGC 300",
+      "credit": "ESO",
+      "displayCredit": "ESO",
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+          }
+        ]
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+      "datasetId": "optical",
+      "license": "CC-BY-4.0; retain the complete recorded credit.",
+      "capture": {
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+          {
+            "kind": "unresolved",
+            "label": "WFI B [O III] V R H-alpha",
+            "evidence": "https://www.eso.org/public/images/eso1037a/",
+            "reason": "The publisher's colour composite; the retained record does not identify the individual exposures."
+          }
+        ]
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+    {
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+      "path": "src/objects/ngc-300-layers/source/pena-pne/table.csv",
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+      "title": "A catalog of planetary nebula candidates in the Sculptor spiral galaxy NGC300, table.csv",
+      "credit": "M. Pena, J. Reyes-Perez, L. Hernandez-Martinez, M. Perez-Guillen; A&A 547, A78",
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+      "credit": "G. Pietrzynski, W. Gieren, P. Fouque, F. Pont; AJ 123, 789",
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+          }
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+    },
+    {
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+      "title": "A catalog of OB associations in the spiral galaxy NGC 300, table.csv",
+      "credit": "G. Pietrzynski, W. Gieren, P. Fouque, F. Pont; A&A 371, 497",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through pietrzynski-ob/points.json.",
+      "sourceBinding": {
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+    },
+    {
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+      "title": "Planetary nebulae and HII regions in NGC 300, table.csv",
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+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through soffner-hii/points.json.",
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+      "id": "vucetic-snr-table",
+      "path": "src/objects/ngc-300-layers/source/vucetic-snr/table.csv",
+      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F446%2F943%2Fngc300%22",
+      "title": "Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H-alpha emission, table.csv",
+      "credit": "M. M. Vucetic, B. Arbutina, D. Urosevic; MNRAS 446, 943",
+      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through vucetic-snr/points.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "vucetic-2015-optical-snr",
+            "role": "material",
+            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F446%2F943%2Fngc300%22"
+          }
+        ]
+      }
+    }
+  ],
+  "documents": [
+    {
+      "id": "recipe",
+      "path": "src/objects/ngc-300-layers/source/recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Image-layer preparation recipe",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "provenance",
+      "path": "src/objects/ngc-300-layers/source/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Published image interpretation and acquisition record",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "presentation",
+      "path": "src/objects/ngc-300-layers/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
+      },
+      "kind": "authored-document",
+      "origin": "cssEarth project-authored record",
+      "credit": "cssEarth contributors",
+      "title": "Dataset presentation and prepared-bank bindings",
+      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
+    },
+    {
+      "id": "stellar-extent",
+      "path": "src/objects/ngc-300-layers/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "bland-hawthorn-2005-ngc300-outer-disc",
+            "role": "reference",
+            "evidence": "https://arxiv.org/abs/astro-ph/0503488"
+          }
+        ]
+      }
+    },
+    {
+      "id": "dots-merge",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-300-layers/source/dots/merge.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "pena-pne-points",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-300-layers/source/pena-pne/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A catalog of planetary nebula candidates in the Sculptor spiral galaxy NGC300 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "pietrzynski-cepheids-points",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-300-layers/source/pietrzynski-cepheids/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the The ARAUCARIA project: discovery of Cepheid variables in NGC 300 from a wide-field imaging survey rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "pietrzynski-ob-points",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-300-layers/source/pietrzynski-ob/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the A catalog of OB associations in the spiral galaxy NGC 300 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "soffner-hii-points",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-300-layers/source/soffner-hii/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the Planetary nebulae and HII regions in NGC 300 rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "id": "vucetic-snr-points",
+      "kind": "authored-document",
+      "path": "src/objects/ngc-300-layers/source/vucetic-snr/points.json",
+      "origin": "project-authored",
+      "credit": "cssEarth contributors",
+      "acquisition": "Authored selection, frame and colour of the Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H-alpha emission rows drawn as dots.",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/ngc-300/source/pena-pne/points.json b/src/objects/ngc-300-layers/source/pena-pne/points.json
similarity index 100%
rename from src/objects/ngc-300/source/pena-pne/points.json
rename to src/objects/ngc-300-layers/source/pena-pne/points.json
diff --git a/src/objects/ngc-300/source/pietrzynski-cepheids/points.json b/src/objects/ngc-300-layers/source/pietrzynski-cepheids/points.json
similarity index 100%
rename from src/objects/ngc-300/source/pietrzynski-cepheids/points.json
rename to src/objects/ngc-300-layers/source/pietrzynski-cepheids/points.json
diff --git a/src/objects/ngc-300/source/pietrzynski-ob/points.json b/src/objects/ngc-300-layers/source/pietrzynski-ob/points.json
similarity index 100%
rename from src/objects/ngc-300/source/pietrzynski-ob/points.json
rename to src/objects/ngc-300-layers/source/pietrzynski-ob/points.json
diff --git a/src/objects/ngc-300/source/presentation.json b/src/objects/ngc-300-layers/source/presentation.json
similarity index 86%
rename from src/objects/ngc-300/source/presentation.json
rename to src/objects/ngc-300-layers/source/presentation.json
index 3de57d9c0c5..49133e45fd5 100644
--- a/src/objects/ngc-300/source/presentation.json
+++ b/src/objects/ngc-300-layers/source/presentation.json
@@ -1,19 +1,19 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "ngc-300",
+  "objectId": "ngc-300-layers",
   "name": "NGC 300",
   "defaultDataset": "optical",
   "bank": {
-    "path": "src/objects/ngc-300/prepared/image-layers.json"
+    "path": "src/objects/ngc-300-layers/prepared/image-layers.json"
   },
   "recipes": [
     {
       "id": "image-layer-recipe",
-      "path": "src/objects/ngc-300/source/recipe.json"
+      "path": "src/objects/ngc-300-layers/source/recipe.json"
     },
     {
       "id": "source-evidence",
-      "path": "src/objects/ngc-300/source/provenance.json"
+      "path": "src/objects/ngc-300-layers/source/provenance.json"
     }
   ],
   "sharedInputs": [],
diff --git a/src/objects/ngc-300/source/provenance.json b/src/objects/ngc-300-layers/source/provenance.json
similarity index 100%
rename from src/objects/ngc-300/source/provenance.json
rename to src/objects/ngc-300-layers/source/provenance.json
diff --git a/src/objects/ngc-300/source/recipe.json b/src/objects/ngc-300-layers/source/recipe.json
similarity index 99%
rename from src/objects/ngc-300/source/recipe.json
rename to src/objects/ngc-300-layers/source/recipe.json
index 01a0f20934a..d8b8b163ceb 100644
--- a/src/objects/ngc-300/source/recipe.json
+++ b/src/objects/ngc-300-layers/source/recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-image-layer-recipe@1",
-  "id": "ngc-300",
+  "id": "ngc-300-layers",
   "source": {
     "path": "source.jpg",
     "dimensions": [
diff --git a/src/objects/ngc-300/source/soffner-hii/points.json b/src/objects/ngc-300-layers/source/soffner-hii/points.json
similarity index 100%
rename from src/objects/ngc-300/source/soffner-hii/points.json
rename to src/objects/ngc-300-layers/source/soffner-hii/points.json
diff --git a/src/objects/ngc-300/source/stellar-extent.json b/src/objects/ngc-300-layers/source/stellar-extent.json
similarity index 94%
rename from src/objects/ngc-300/source/stellar-extent.json
rename to src/objects/ngc-300-layers/source/stellar-extent.json
index da74ff924f8..e39da26c013 100644
--- a/src/objects/ngc-300/source/stellar-extent.json
+++ b/src/objects/ngc-300-layers/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "ngc-300",
+  "objectId": "ngc-300-layers",
   "radiusPc": 14400,
   "definition": "Projected radius from the NGC 300 centre to which Gemini star counts trace its stellar disc, with no truncation.",
   "quote": "or about 14.4 kpc at a cepheid distance of 2.0 +/- 0.07 Mpc",
diff --git a/src/objects/ngc-300/source/vucetic-snr/points.json b/src/objects/ngc-300-layers/source/vucetic-snr/points.json
similarity index 100%
rename from src/objects/ngc-300/source/vucetic-snr/points.json
rename to src/objects/ngc-300-layers/source/vucetic-snr/points.json
diff --git a/src/objects/ngc-300/README.md b/src/objects/ngc-300/README.md
index f2c3ed790f5..6dd178de1b4 100644
--- a/src/objects/ngc-300/README.md
+++ b/src/objects/ngc-300/README.md
@@ -1,64 +1,16 @@
 # NGC 300
 
-A ground-based photograph of NGC 300, cleaned of the Milky Way stars in front of it and colour-tied to its measured
-integrated colour, is spread through a modelled disc. Published catalogues of its planetary nebulae, HII regions,
-Cepheids, OB associations and supernova remnants are drawn as dots on the same disc. Image brightness does not measure
-per-pixel distance.
+NGC 300 as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [NGC 300 image layers](../ngc-300-layers/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Selected source | Input and meaning |
-| --- | --- |
-| [Spiral galaxy NGC 300](https://www.eso.org/public/images/eso1037a/) | [Record](../../sources/eso-eso1037a.json). The MPG/ESO 2.2-metre WFI view in B, [O III], V, R and H-alpha, 7603 × 7603 px over 30.22 × 30.22 arcmin (`source/source.jpg`, the Large JPEG, restored from its origin). Found in the WorldWide Telescope image index. |
-| [Westmeier et al. (2011)](https://arxiv.org/abs/1009.0317) | [Record](../../sources/westmeier-2011-ngc300-hi.json). Table 1: the inner HI disc at position angle 290°; Sect. 4: a geometric inclination of about 44°, consistent with their tilted rings (40° to 50°): the disc the photograph and dots lie on. |
-| [Salo et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/219/4) | [Record](../../sources/salo-2015-s4g-decompositions.json). S4G's 3.6 µm fit: a single exponential disc with scale length 152.16″ (1.54 kpc), no bulge. |
-| [Kregel et al. (2002)](https://arxiv.org/abs/astro-ph/0204154) | [Record](../../sources/kregel-2002-disc-flattening.json). Sect. 4.3: discs are on average 7.3 ± 2.2 times longer than thick, so the 1.54 kpc scale length gives a 211 pc scale height. |
-| [Gaia DR3](https://doi.org/10.1051/0004-6361/202243940) with [Ren et al. (2021)](https://doi.org/10.3847/1538-4357/abcda5) | The 1,027 Gaia DR3 sources within 0.38° of NGC 300's centre that Ren et al.'s criterion marks as Milky Way stars (`source/gaia-dr3-foreground.csv`, restored by the query in the Gaia record). |
-| [RC3](../../sources/rc3-1991.json) | NGC 300's total B-V, 0.59 ± 0.03 as observed. |
-| [Local Volume Database](../../sources/lvdb-v1-1-1.json) | Centre and distance: distance modulus 26.6 (Tully et al. 2009), 2.09 Mpc. |
-| [Peña et al. (2012)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/547/A78) | [Planetary nebulae](source/pena-pne/points.json): 101 of their 112, leaving out the rows they mark as compact HII regions, very uncertain or indefinite. |
-| [Soffner et al. (1996)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/306/9) | [HII regions](source/soffner-hii/points.json): 90 in their three fields. |
-| [Pietrzyński et al. (2002)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/123/789) | [Cepheids](source/pietrzynski-cepheids/points.json): 117 with periods. |
-| [Pietrzyński et al. (2001)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/371/497) | [OB associations](source/pietrzynski-ob/points.json): 117 candidates. |
-| [Vučetić et al. (2015)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/446/943) | [Supernova remnants](source/vucetic-snr/points.json): 22 optically identified remnants. |
-| [Bland-Hawthorn et al. (2005)](https://arxiv.org/abs/astro-ph/0503488) | [Stellar extent](source/stellar-extent.json): star counts trace the disc to 24′, about 14.4 kpc at their 2.0 Mpc, with no truncation; inside it NGC 300's caption hides. |
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/ngc-300.json) cites the position, distance and velocity that place it.
 
-The catalogue tables are TAP queries of CDS (the query is each descriptor's `table.origin`); they are not tracked.
+## Processing
 
-## The photograph
-
-- **Registration:** the publisher's stated centre is 28 px from the image's: bright Gaia stars all sat 28 px to one side.
-  With the centre moved, they fall within a few pixels of their images; the stated orientation fits.
-- **Foreground stars:** 145 of the 567 Gaia foreground stars in the image are removed where they show; 125 on the
-  galaxy's light are left, and most of the rest are too faint to show at the 3000 px face size.
-- **Colour:** tied to RC3's B-V of 0.59: red/green 1.099 and blue/green 1.183 against 1.085 and 0.919, so red × 0.987
-  and blue × 0.777 in linear light. The publisher's composite ran blue.
-- **Disc:** inclination 44°, line of nodes 110°, support 9.4 kpc (where the frame stops on its tightest side), 32 slabs
-  with an exponential of 211 pc over ±3 scale heights. No bulge: S4G fits NGC 300 with a disc alone.
-
-## Dots
-
-| Catalogue | Drawn | Left out |
-| --- | --- | --- |
-| Planetary nebulae (Peña et al. 2012) | 101 | 11 rows the authors flag |
-| HII regions (Soffner et al. 1996) | 90 | none |
-| Cepheids (Pietrzyński et al. 2002) | 115 | 2 beyond the photograph |
-| OB associations (Pietrzyński et al. 2001) | 117 | none |
-| Supernova remnants (Vučetić et al. 2015) | 22 | none |
-
-Dots keep their place in the disc and rise along its axis to heights drawn from the 211 pc layer. Colours are the Milky
-Way's and M31's for each kind; each dot takes its tone from the photograph's brightness under it (never below 15%) and
-moves halfway from its kind's colour to the photograph's colour there.
-
-## Evidence
-
-- In the app: the default view (left) and tilted (right), with the dots.
-  Captured on this branch on 2026-09-29.
-- The prepared bank's `approximation.limitations` records the foreground and colour-tie counts quoted above.
+1. `pnpm prepare:objects --object=ngc-300` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts ngc-300` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- Westmeier et al.'s HI disc twists by about 40° beyond 10 arcmin; only the inner disc's orientation is used.
-- The frame stops at 9.4 kpc, inside the 14.4 kpc to which the stars are traced.
-- Soffner et al.'s HII regions cover three fields only.
-- Depth is modelled: slabs are the photograph along our sight lines, so side views are approximate.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/ngc-300/inventory.json b/src/objects/ngc-300/inventory.json
index aae4285cc75..8e34414665c 100644
--- a/src/objects/ngc-300/inventory.json
+++ b/src/objects/ngc-300/inventory.json
@@ -3,537 +3,51 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/optical.webp",
+      "filename": "ngc-300-dataset-optical.webp",
       "bytes": 15188,
       "sha256": "0ed77e15491e63b596c389d65125d52812c4a96b5c7f2b94bcc5606623f2de95"
     },
     {
       "location": "prepared",
-      "filename": "dots.bin",
-      "bytes": 5527,
-      "sha256": "63eb630a762e679a4e34b71e78de3fc19166830275ba4a187eb255d3e5ed447a"
+      "filename": "content.json",
+      "bytes": 2766,
+      "sha256": "3e8a8eef5cdfd9d3218a9223773840715973393c3e28c52ed755629337b89481"
     },
     {
       "location": "prepared",
-      "filename": "image-layers.json",
-      "bytes": 148841,
-      "sha256": "d8cda8deb4f85250e83a77bd0a0b61dc73ca605291482defb017de37e0100efc"
+      "filename": "controls.json",
+      "bytes": 460,
+      "sha256": "194bf1a66c8b646e8f88c43cd8c4ab5acc396b14995f946a6e4ae5a5368d439a"
     },
     {
       "location": "prepared",
-      "filename": "layers/x-02.webp",
-      "bytes": 594,
-      "sha256": "7ac60474106fb05bf512c7b9706a5e3975bce3d298e916a3858c436dac532dd6"
+      "filename": "datasets.json",
+      "bytes": 555,
+      "sha256": "b831151d904339033e67e7d5078fec5b9b82bb30b82bf736500fe602e0b6c84e"
     },
     {
       "location": "prepared",
-      "filename": "layers/x-03.webp",
-      "bytes": 1170,
-      "sha256": "200a3e88535889707f8cfa17eab6db15a17234f65f5d778ad806039ff8bd7d8a"
+      "filename": "runtime.json",
+      "bytes": 4605,
+      "sha256": "14546b00193a92f55c91970be2ceb3dc488ebd7f0737776c94022fcf4a25e930"
     },
     {
       "location": "prepared",
-      "filename": "layers/x-04.webp",
-      "bytes": 1418,
-      "sha256": "7291e74b7e7145450d5ab5c41342ed1e5047afc5fca32f1176b520439d603012"
+      "filename": "scene.json",
+      "bytes": 3882,
+      "sha256": "7131dbf625221de2c9f8cdc2ce3c174b2ed5c919ed05107b98940796ac8178ca"
     },
     {
       "location": "prepared",
-      "filename": "layers/x-05.webp",
-      "bytes": 1588,
-      "sha256": "a0c2a3c0d3e5a71c45a58e8abc57050727b2152abd16680e9759beb51e501209"
+      "filename": "text.json",
+      "bytes": 1099,
+      "sha256": "b39a3752d48ce474a948f22cac3e57364c734539d12a6b973d29833b89a5ff6b"
     },
     {
       "location": "prepared",
-      "filename": "layers/x-06.webp",
-      "bytes": 2044,
-      "sha256": "32ea5ef3d3e26c203fa8c02930c71ec8c7e9339998b677df47a514d3c035797c"
-    },
-    {
-      "location": "prepared",
-      "filename": "layers/x-07.webp",
-      "bytes": 2412,
-      "sha256": "293a8f1d2fb7f75c2234a1e681d4ef728d96c41d375877fe2dcb30b2aa645a51"
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-      "bytes": 2502,
-      "sha256": "1ea6f45a5430cfb8461a45bfe6b574720ca05b2e2e0f02e4c810dfa5d0eb2c65"
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-      "bytes": 2660,
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-      "bytes": 2588,
-      "sha256": "f4a2d0531d5b28525d3e7ab02acfe8ab4999c359adecc7d4d81d764ec0f47fa4"
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-      "bytes": 3398,
-      "sha256": "77b98a0d8fe725f81b224a4ab53f70fbb1f5a0b5f589a4321652a03f539648e4"
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diff --git a/src/objects/ngc-300/object.json b/src/objects/ngc-300/object.json
index 508f9f7a32c..da9e2e7edef 100644
--- a/src/objects/ngc-300/object.json
+++ b/src/objects/ngc-300/object.json
@@ -1,45 +1,92 @@
 {
   "schema": "cssearth-object@2",
   "id": "ngc-300",
-  "type": "image-layer-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "NGC 300",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 290053692660188500
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "NGC 300",
+      "systemName": "Galaxy catalogue",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 430948261600,
+      "description": "A galaxy 2.1 million parsecs away.",
+      "order": 5150,
+      "context": {}
+    },
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       "referenceFrame": "sun-icrf",
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-        "min": [
-          -8.902334352164612,
-          -7.014792587616671,
-          -10.154972684155837
-        ],
-        "max": [
-          8.95685837380931,
-          7.084676922939968,
-          10.270064401717264
-        ]
-      }
-    },
-    "preparation": {
-      "source": "source/recipe.json"
-    },
-    "cataloguePoints": [
-      "dots"
-    ]
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 935657073097382100,
+      "bodyRadiusM": 290053692660188480000
+    }
   },
   "prepared": {
-    "format": "cssearth-image-layer-bank@1",
-    "url": "prepared/image-layers.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/ngc-300/source/content/object.json b/src/objects/ngc-300/source/content/object.json
new file mode 100644
index 00000000000..73e88beac4f
--- /dev/null
+++ b/src/objects/ngc-300/source/content/object.json
@@ -0,0 +1,114 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "ngc-300",
+  "displayName": "NGC 300",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "2.089 Mpc (\u221256,940 / +58,530 pc)",
+        "source": {
+          "catalogueId": "publication-tully2009aj-138-323t",
+          "url": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T",
+          "label": "Tully2009AJ....138..323T: The Extragalactic Distance Database",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 13.72\u00b0, Dec -37.68\u00b0",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "membership",
+        "label": "Membership",
+        "value": "Local volume, Field",
+        "source": {
+          "catalogueId": "publication-mcconnachie2012aj-144-4m",
+          "url": "https://cadc-west-01.canfar.net/vault/files/PANDAS/NearbyGals/table1_OCT2019.pdf",
+          "label": "McConnachie (2012), AJ 144, 4, DOI 10.1088/0004-6256/144/1/4; author October 2019 Table 1 update, read from its text transcription (first seven pages, pypdf 5.9.0; numeric membership classifications unchanged).",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "half-light-radius",
+        "label": "Half-light radius",
+        "value": "3.039 kpc",
+        "source": {
+          "catalogueId": "publication-mcconnachie2012aj-144-4m",
+          "url": "https://ui.adsabs.harvard.edu/abs/2012AJ....144....4M/abstract",
+          "label": "McConnachie2012AJ....144....4M: The Observed Properties of Dwarf Galaxies in and around the Local Group",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "optical",
+    "controls": [
+      {
+        "id": "optical",
+        "label": "ESO \u00b7 optical",
+        "thumbnail": "ngc-300-dataset-optical.webp",
+        "volume": {
+          "objectId": "ngc-300-layers",
+          "datasetId": "optical",
+          "surface": "optical"
+        },
+        "source": {
+          "id": "ngc-300-layers-optical",
+          "path": "../../ngc-300-layers/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1037a/"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Tully2009AJ....138..323T: The Extragalactic Distance Database",
+      "href": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+      "href": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "McConnachie (2012), AJ 144, 4, DOI 10.1088/0004-6256/144/1/4; author October 2019 Table 1 update, read from its text transcription (first seven pages, pypdf 5.9.0; numeric membership classifications unchanged).",
+      "href": "https://cadc-west-01.canfar.net/vault/files/PANDAS/NearbyGals/table1_OCT2019.pdf"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "McConnachie2012AJ....144....4M: The Observed Properties of Dwarf Galaxies in and around the Local Group",
+      "href": "https://ui.adsabs.harvard.edu/abs/2012AJ....144....4M/abstract"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T",
+      "credit": "Tully2009AJ....138..323T: The Extragalactic Distance Database"
+    }
+  }
+}
diff --git a/src/objects/ngc-300/source/manifest.json b/src/objects/ngc-300/source/manifest.json
index 487ffc7821a..7513566703d 100644
--- a/src/objects/ngc-300/source/manifest.json
+++ b/src/objects/ngc-300/source/manifest.json
@@ -1,257 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "optical",
-      "path": "src/objects/ngc-300/source/source.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/eso1037a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1037a/",
-      "title": "Spiral galaxy NGC 300",
-      "credit": "ESO",
-      "displayCredit": "ESO",
-      "acquisition": "The publisher Large JPEG (7603 x 7603 px), restored from its origin; not tracked. Registration re-measured against Gaia stars (recipe observation). The hash identifies the local JPEG bytes, not a calibrated scientific array.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso1037a",
-            "role": "material",
-            "evidence": "src/objects/ngc-300/source/provenance.json"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "optical",
+      "credit": "ESO; the default dataset's picture as the NGC 300 bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0; retain the complete recorded credit.",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "WFI B [O III] V R H-alpha",
-            "evidence": "https://www.eso.org/public/images/eso1037a/",
-            "reason": "The publisher's colour composite; the retained record does not identify the individual exposures."
-          }
-        ]
-      }
-    },
-    {
-      "id": "pena-pne-table",
-      "path": "src/objects/ngc-300/source/pena-pne/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Seq%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F547%2FA78%2Ftable2%22+WHERE+Com+NOT+LIKE+%27%25cHII%25%27+AND+Com+NOT+LIKE+%27%25uncertain%25%27+AND+Com+NOT+LIKE+%27%25indef%25%27",
-      "title": "A catalog of planetary nebula candidates in the Sculptor spiral galaxy NGC300, table.csv",
-      "credit": "M. Pena, J. Reyes-Perez, L. Hernandez-Martinez, M. Perez-Guillen; A&A 547, A78",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through pena-pne/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "pena-2012-ngc300-pne",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Seq%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FA%2BA%2F547%2FA78%2Ftable2%22+WHERE+Com+NOT+LIKE+%27%25cHII%25%27+AND+Com+NOT+LIKE+%27%25uncertain%25%27+AND+Com+NOT+LIKE+%27%25indef%25%27"
-          }
-        ]
-      }
-    },
-    {
-      "id": "pietrzynski-cepheids-table",
-      "path": "src/objects/ngc-300/source/pietrzynski-cepheids/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BPGF2002%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FAJ%2F123%2F789%2Ftable2%22",
-      "title": "The ARAUCARIA project: discovery of Cepheid variables in NGC 300 from a wide-field imaging survey, table.csv",
-      "credit": "G. Pietrzynski, W. Gieren, P. Fouque, F. Pont; AJ 123, 789",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through pietrzynski-cepheids/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "pietrzynski-2002-ngc300-cepheids",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BPGF2002%5D%22%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FAJ%2F123%2F789%2Ftable2%22"
-          }
-        ]
-      }
-    },
-    {
-      "id": "pietrzynski-ob-table",
-      "path": "src/objects/ngc-300/source/pietrzynski-ob/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BPGF2001%5D%22%2C+RA2000%2C+DE2000+FROM+%22J%2FA%2BA%2F371%2F497%2Ftable1%22",
-      "title": "A catalog of OB associations in the spiral galaxy NGC 300, table.csv",
-      "credit": "G. Pietrzynski, W. Gieren, P. Fouque, F. Pont; A&A 371, 497",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through pietrzynski-ob/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "pietrzynski-2001-ngc300-ob-associations",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+%22%5BPGF2001%5D%22%2C+RA2000%2C+DE2000+FROM+%22J%2FA%2BA%2F371%2F497%2Ftable1%22"
-          }
-        ]
-      }
-    },
-    {
-      "id": "soffner-hii-table",
-      "path": "src/objects/ngc-300/source/soffner-hii/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Field+%7C%7C+%27-%27+%7C%7C+HII%2C+RA2000%2C+DE2000+FROM+%22J%2FA%2BA%2F306%2F9%2Ftab3-5%22",
-      "title": "Planetary nebulae and HII regions in NGC 300, table.csv",
-      "credit": "T. Soffner, R. H. Mendez, G. H. Jacoby, R. Ciardullo; A&A 306, 9",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through soffner-hii/points.json.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "soffner-1996-ngc300-hii",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Field+%7C%7C+%27-%27+%7C%7C+HII%2C+RA2000%2C+DE2000+FROM+%22J%2FA%2BA%2F306%2F9%2Ftab3-5%22"
-          }
-        ]
-      }
-    },
-    {
-      "id": "vucetic-snr-table",
-      "path": "src/objects/ngc-300/source/vucetic-snr/table.csv",
-      "origin": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F446%2F943%2Fngc300%22",
-      "title": "Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H-alpha emission, table.csv",
-      "credit": "M. M. Vucetic, B. Arbutina, D. Urosevic; MNRAS 446, 943",
-      "acquisition": "Published table downloaded unchanged from its CDS origin; read by packages/bake/cli/prepare-catalogue-points.mts through vucetic-snr/points.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "vucetic-2015-optical-snr",
-            "role": "material",
-            "evidence": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync?REQUEST=doQuery&LANG=ADQL&FORMAT=csv&QUERY=SELECT+Name%2C+RAJ2000%2C+DEJ2000+FROM+%22J%2FMNRAS%2F446%2F943%2Fngc300%22"
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/ngc-300-layers/source/manifest.json)."
       }
     }
   ],
   "documents": [
     {
-      "id": "recipe",
-      "path": "src/objects/ngc-300/source/recipe.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Image-layer preparation recipe",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "provenance",
-      "path": "src/objects/ngc-300/source/provenance.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Published image interpretation and acquisition record",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "presentation",
-      "path": "src/objects/ngc-300/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned processing, source interpretation or presentation record; the published image is separately bound as a material input."
-      },
-      "kind": "authored-document",
-      "origin": "cssEarth project-authored record",
-      "credit": "cssEarth contributors",
-      "title": "Dataset presentation and prepared-bank bindings",
-      "acquisition": "Checked-in project-authored JSON. This pin identifies local processing or interpretation metadata, not an original publisher document; the published image is separately bound in inputs."
-    },
-    {
-      "id": "stellar-extent",
-      "path": "src/objects/ngc-300/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "bland-hawthorn-2005-ngc300-outer-disc",
-            "role": "reference",
-            "evidence": "https://arxiv.org/abs/astro-ph/0503488"
-          }
-        ]
-      }
-    },
-    {
-      "id": "dots-merge",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-300/source/dots/merge.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored merge of the catalogue dot banks into one layer.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "pena-pne-points",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-300/source/pena-pne/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A catalog of planetary nebula candidates in the Sculptor spiral galaxy NGC300 rows drawn as dots.",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "pietrzynski-cepheids-points",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-300/source/pietrzynski-cepheids/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the The ARAUCARIA project: discovery of Cepheid variables in NGC 300 from a wide-field imaging survey rows drawn as dots.",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "pietrzynski-ob-points",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-300/source/pietrzynski-ob/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the A catalog of OB associations in the spiral galaxy NGC 300 rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "soffner-hii-points",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-300/source/soffner-hii/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the Planetary nebulae and HII regions in NGC 300 rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
-    },
-    {
-      "id": "vucetic-snr-points",
-      "kind": "authored-document",
-      "path": "src/objects/ngc-300/source/vucetic-snr/points.json",
-      "origin": "project-authored",
-      "credit": "cssEarth contributors",
-      "acquisition": "Authored selection, frame and colour of the Optical supernova remnants in nearby galaxies and their influence on star formation rates derived from H-alpha emission rows drawn as dots.",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Project-authored processing configuration."
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/ngc-300/source/preparation/navigation.json b/src/objects/ngc-300/source/preparation/navigation.json
new file mode 100644
index 00000000000..3bc37b5c986
--- /dev/null
+++ b/src/objects/ngc-300/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "ngc-300",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/ngc-300/source/presentation/context.png b/src/objects/ngc-300/source/presentation/context.png
new file mode 100644
index 00000000000..b2ab0668206
Binary files /dev/null and b/src/objects/ngc-300/source/presentation/context.png differ
diff --git a/src/objects/ngc-300/source/presentation/solar-system.json b/src/objects/ngc-300/source/presentation/solar-system.json
new file mode 100644
index 00000000000..259340eccae
--- /dev/null
+++ b/src/objects/ngc-300/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "ngc-300",
+  "displayName": "NGC 300",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 2.900536926601885e+17,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/ngc-300/text.json b/src/objects/ngc-300/text.json
new file mode 100644
index 00000000000..08d4a742e9e
--- /dev/null
+++ b/src/objects/ngc-300/text.json
@@ -0,0 +1,44 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "ngc-300",
+  "card": {
+    "text": "A galaxy 2.1 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-tully2009aj-138-323t",
+        "url": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T",
+        "label": "Tully2009AJ....138..323T: The Extragalactic Distance Database",
+        "checked": "2026-10-01",
+        "locator": "distance: 2.089 Mpc (−56,940 / +58,530 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 2.1 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "publication-tully2009aj-138-323t",
+        "url": "https://ui.adsabs.harvard.edu/abs/2009AJ....138..323T",
+        "label": "Tully2009AJ....138..323T: The Extragalactic Distance Database",
+        "checked": "2026-10-01",
+        "locator": "distance: 2.089 Mpc (−56,940 / +58,530 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "optical": {
+      "title": "Spiral galaxy NGC 300",
+      "detail": "7603 × 7603 px",
+      "summary": "Visible-light image on an approximate depth model; individual depths are not measured.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1037a",
+          "url": "https://www.eso.org/public/images/eso1037a/",
+          "label": "Spiral galaxy NGC 300; ESO",
+          "checked": "2026-10-01",
+          "locator": "Spiral galaxy NGC 300"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/omega-centauri-volume/README.md b/src/objects/omega-centauri-volume/README.md
new file mode 100644
index 00000000000..5b70d7de614
--- /dev/null
+++ b/src/objects/omega-centauri-volume/README.md
@@ -0,0 +1,65 @@
+# Omega Centauri (NGC 5139)
+
+Omega Centauri is shown as a volume of 149 XYZ slabs with stellar light baked
+into them, and one shared geometry bank for both optical datasets. The app keeps
+493 elements, inside the 500-element limit. **Visual acceptance remains
+blocked:** the result fails the fixed axis-handoff image gate and is an
+integration candidate.
+
+## Sources
+
+| Dataset | Native image and coverage |
+| --- | --- |
+| [VST/OmegaCAM, eso1119b](https://www.eso.org/public/images/eso1119b/) | G/R/I display composite; 14540 × 14540 pixels; 50.88′ square. Selected geometry/light reference. |
+| [MPG/ESO 2.2-m WFI, eso0844a](https://www.eso.org/public/images/eso0844a/) | B/V/I display composite; 8040 × 7560 pixels; 31.88′ × 29.99′. Same model geometry, different image material. Two mosaic gaps contain publisher-supplied DSS data. |
+
+The [source manifest](source/manifest.json) keeps exact image identities, full
+credits and ESO's reuse terms. Published display colors do not establish natural
+color or calibrated luminosity.
+
+The [MGE recipe](source/bake-inputs/references/02-photometric-mge.json) uses the
+eight projected Gaussians in [D’Souza & Rix (2013), Table 1](https://doi.org/10.1093/mnras/sts426),
+with inclination 50° and photometric major-axis PA 100° east of north. The
+[5426 ± 47 pc distance](https://doi.org/10.1093/mnras/stab1474) is the combined
+NGC 5139 distance in Baumgardt & Vasiliev (2021), Table 2. It locates the
+cluster, not individual stars. Competing fits and the rejected spherical
+King-Abel experiment are in the [physical evidence](source/bake-inputs/references/04-physical-evidence.json).
+
+## Processing
+
+A smooth oblate MGE envelope carries broad integrated starlight. Finite positive
+image residuals receive conditional depths and dataset-specific materials. Both
+optical datasets use the same geometry, and no separate star layer counts the
+light twice. The [method account](../../../labs/nebula/models/omega-centauri/README.md)
+explains the numerical choices.
+
+The compiler reserves renderer copies and overhead before allocating slabs. It
+keeps **X 48, Y 45, Z 56**, so the app holds 447 slab elements, 26 impostors
+and 20 wrappers. All 4,085 fitted emission features, the photometric envelope,
+registration and optical materials are kept. The source-owned
+[compact input](source/bake-inputs.json.gz) replays without the Lab, caches or
+network. The [delivery recipe](source/delivery.json) records the failed visual
+qualification; `acceptedLabResult` identifies this candidate, not an acceptance
+certificate. Shared preparation and replay commands are in the
+[nebula guide](../../../docs/nebulae/README.md).
+
+## Evidence
+
+- Replay reproduced all 447 expected raw PNGs and 59 delivery files exactly.
+- Native arrival, orbit, close zoom, galaxy-context return and both dataset switches each keep exactly 493 elements. Arrival framing is 204.5516 pixels in a 1440 × 1000 viewport.
+- All 1,040 reference depth cells stay integrated, but on fewer slabs: estimated axis errors are 10.5–10.7% against a 1% target, and front views are 23–25% brighter than the previous 459-slab bank.
+- Neutral X/Z and Y/Z handoff L1 is **0.131881 / 0.125192**, above the **0.04** limit. All nine tested dataset/axis pairs fail it; brightness disagreement between axes stays below 5%.
+
+The [descriptor](object.json) and [inventory](inventory.json) pin the delivery.
+
+## Known problems
+
+- Axis-handoff image stability is outside the acceptance limits. Earlier Lab inspection also exposed a false grid and an oblique compositor rectangle.
+- Desktop GPU performance has not been measured.
+- The shared zoom minimum is **0.05 framing radii (2.17 pc)**. Reaching it does not establish an acceptable close-up view.
+- Near/far tilt and the six-sigma numerical support cutoff are authored. The MGE's coefficient uncertainties are unavailable.
+- Absolute astrometry starts from publisher AVM. Relative image registration does not establish absolute Gaia astrometry or independent WFI detections in DSS-filled gaps.
+- The 512-pixel fit and minimum 5.80-arcsec projected sigma soften native stellar texture. Crowding, saturated cores, seeing and publisher display stretches remain. Fitted light features are not a resolved-star catalogue, dynamical mass map or N-body simulation.
+
+The [investigation ledger](investigations.json) records selected sources,
+alternatives and unresolved acceptance.
diff --git a/src/objects/omega-centauri-volume/inventory.json b/src/objects/omega-centauri-volume/inventory.json
new file mode 100644
index 00000000000..a8b09f66517
--- /dev/null
+++ b/src/objects/omega-centauri-volume/inventory.json
@@ -0,0 +1,389 @@
+{
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+      "filename": "eso1119b/impostors/view-ppn.png",
+      "bytes": 23507,
+      "sha256": "b16791ed70b6ca22bbd84ce8d9a295711c1b55cc8e1dd28dab6e968d535b9788"
+    },
+    {
+      "location": "prepared",
+      "filename": "eso1119b/impostors/view-ppp.png",
+      "bytes": 23343,
+      "sha256": "cd8a0f7a94149a386a8b98ec8a47257539193ef9f612701309e32cc6def08212"
+    },
+    {
+      "location": "prepared",
+      "filename": "presentation.json",
+      "bytes": 4018,
+      "sha256": "1208d328bbaab4c3d4ec55b9f6be8b14072ec4a2f8fc2b604ea67b9d9b66ec0f"
+    },
+    {
+      "location": "prepared",
+      "filename": "provenance.json",
+      "bytes": 55565,
+      "sha256": "4cc7176b64136617c26f945b8f4a23b003824b0a7d066ddd20fea71f095e123d"
+    }
+  ]
+}
diff --git a/src/objects/omega-centauri/investigations.json b/src/objects/omega-centauri-volume/investigations.json
similarity index 99%
rename from src/objects/omega-centauri/investigations.json
rename to src/objects/omega-centauri-volume/investigations.json
index b9ad8aadd51..6fbb968d5a2 100644
--- a/src/objects/omega-centauri/investigations.json
+++ b/src/objects/omega-centauri-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "omega-centauri",
+  "objectId": "omega-centauri-volume",
   "entries": [
     {
       "id": "dataset-eso1119b",
diff --git a/src/objects/omega-centauri-volume/object.json b/src/objects/omega-centauri-volume/object.json
new file mode 100644
index 00000000000..417a528415f
--- /dev/null
+++ b/src/objects/omega-centauri-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "omega-centauri-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        -105005412559826930000,
+        -41769153670092810000,
+        -123207430757263850000
+      ],
+      "localToReferenceXyzw": [
+        0.7712350124749122,
+        -0.5231773789172258,
+        -0.20356010658195295,
+        0.3000754383991924
+      ],
+      "metersPerUnit": 811718046418199.9,
+      "boundsUnits": {
+        "min": [
+          -2190.705034159304,
+          -2194.8969278075674,
+          -4259.5353966530165
+        ],
+        "max": [
+          2190.705034159304,
+          2194.8969278075674,
+          4259.5353966530165
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/delivery.json"
+    },
+    "host": "omega-centauri"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/omega-centauri/source/bake-inputs.json.gz b/src/objects/omega-centauri-volume/source/bake-inputs.json.gz
similarity index 100%
rename from src/objects/omega-centauri/source/bake-inputs.json.gz
rename to src/objects/omega-centauri-volume/source/bake-inputs.json.gz
diff --git a/src/objects/omega-centauri/source/bake-inputs/references/01-compiler.json b/src/objects/omega-centauri-volume/source/bake-inputs/references/01-compiler.json
similarity index 87%
rename from src/objects/omega-centauri/source/bake-inputs/references/01-compiler.json
rename to src/objects/omega-centauri-volume/source/bake-inputs/references/01-compiler.json
index 1acd5bdc907..421b49ae982 100644
--- a/src/objects/omega-centauri/source/bake-inputs/references/01-compiler.json
+++ b/src/objects/omega-centauri-volume/source/bake-inputs/references/01-compiler.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-nebula-compiler@1",
-  "id": "omega-centauri",
+  "id": "omega-centauri-volume",
   "label": "Omega Centauri",
   "observationRecipe": "labs/nebula/models/omega-centauri/observations.json",
   "observationCatalogue": ".local/nebula-lab/observations/omega-centauri/observations.json",
@@ -8,8 +8,15 @@
   "structureCatalogue": ".local/nebula-lab/observations/omega-centauri/structures/catalogue.json",
   "photometricPriorRecipe": "labs/nebula/models/omega-centauri/photometric-mge.json",
   "defaultSourceId": "eso1119b",
-  "sourceWeights": { "eso1119b": 1, "eso0844a": 0 },
-  "defaultControls": { "detail": 1, "faint": 0.35, "depth": 1 },
+  "sourceWeights": {
+    "eso1119b": 1,
+    "eso0844a": 0
+  },
+  "defaultControls": {
+    "detail": 1,
+    "faint": 0.35,
+    "depth": 1
+  },
   "maximumStars": 0,
   "interpretation": "The published oblate eight-Gaussian surface-brightness model supplies a conditional three-dimensional starlight prior at its selected inclination and position angle. Registered VST light fits finite emission components within that prior; the independent WFI image recolours the same geometry. Individual feature depths, finite supports and near/far tilt are conditional display choices, not measured stellar positions or membership. Integrated stellar light is preserved; no duplicate compact-star catalogue is added. This is relative display emission, not calibrated luminosity, gas density or a recovered dynamical model."
 }
diff --git a/src/objects/omega-centauri/source/bake-inputs/references/02-photometric-mge.json b/src/objects/omega-centauri-volume/source/bake-inputs/references/02-photometric-mge.json
similarity index 92%
rename from src/objects/omega-centauri/source/bake-inputs/references/02-photometric-mge.json
rename to src/objects/omega-centauri-volume/source/bake-inputs/references/02-photometric-mge.json
index 28d3235e302..afa68691f01 100644
--- a/src/objects/omega-centauri/source/bake-inputs/references/02-photometric-mge.json
+++ b/src/objects/omega-centauri-volume/source/bake-inputs/references/02-photometric-mge.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-photometric-mge@1",
-  "id": "omega-centauri",
+  "id": "omega-centauri-volume",
   "centerIcrsDegrees": [
     201.696958,
     -47.479539
@@ -57,7 +57,7 @@
   },
   "source": {
     "url": "https://wwwmpa.mpa-garching.mpg.de/mpa/publications/preprints/pp2013/MPA3537.pdf",
-    "locator": "D\u2019Souza & Rix2013, Table1, manuscript page12 (PDF page12), eight projected MGE components; arcmin dispersions multiplied by60."
+    "locator": "D’Souza & Rix2013, Table1, manuscript page12 (PDF page12), eight projected MGE components; arcmin dispersions multiplied by60."
   },
   "interpretation": "Published oblate MGE conditioned integrated starlight, interpreted as relative display light. Inclination50 degrees and PA100 degrees follow the selected literature model; the near/far tilt sign and six-sigma cutoff are authored. Gaussian widths retain their published angular scale at adopted distance5426pc and the common observation center. This is not measured star-by-star depth, calibrated luminosity, an N-body simulation or a completed bake/registration acceptance.",
   "envelope": {
diff --git a/src/objects/omega-centauri/source/bake-inputs/references/03-observation-structures.json b/src/objects/omega-centauri-volume/source/bake-inputs/references/03-observation-structures.json
similarity index 100%
rename from src/objects/omega-centauri/source/bake-inputs/references/03-observation-structures.json
rename to src/objects/omega-centauri-volume/source/bake-inputs/references/03-observation-structures.json
diff --git a/src/objects/omega-centauri/source/bake-inputs/references/04-physical-evidence.json b/src/objects/omega-centauri-volume/source/bake-inputs/references/04-physical-evidence.json
similarity index 100%
rename from src/objects/omega-centauri/source/bake-inputs/references/04-physical-evidence.json
rename to src/objects/omega-centauri-volume/source/bake-inputs/references/04-physical-evidence.json
diff --git a/src/objects/omega-centauri/source/bake-inputs/references/05-observations.json b/src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json
similarity index 64%
rename from src/objects/omega-centauri/source/bake-inputs/references/05-observations.json
rename to src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json
index 321db66ed62..792a0324a1f 100644
--- a/src/objects/omega-centauri/source/bake-inputs/references/05-observations.json
+++ b/src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json
@@ -1,12 +1,18 @@
 {
   "schema": "cssearth-nebula-observation-recipe@1",
-  "id": "omega-centauri",
+  "id": "omega-centauri-volume",
   "referenceId": "eso1119b",
   "frame": {
     "width": 1024,
     "height": 1024,
-    "fieldArcminutes": [55, 55],
-    "centerIcrsDegrees": [201.696958, -47.479539],
+    "fieldArcminutes": [
+      55,
+      55
+    ],
+    "centerIcrsDegrees": [
+      201.696958,
+      -47.479539
+    ],
     "northUp": true
   },
   "nativeRemoval": {
@@ -23,22 +29,44 @@
       "page": "https://www.eso.org/public/images/eso1119b/",
       "width": 14540,
       "height": 14540,
-      "fieldArcminutes": [50.88, 50.88],
-      "centerIcrsDegrees": [201.69695833333333, -47.47953888888889],
+      "fieldArcminutes": [
+        50.88,
+        50.88
+      ],
+      "centerIcrsDegrees": [
+        201.69695833333333,
+        -47.47953888888889
+      ],
       "northRightDegrees": -0.00051173061,
       "bands": "Optical G (480nm) / R (625nm) / I (770nm)",
       "credit": "ESO/INAF-VST/OmegaCAM. Acknowledgement: A. Grado, L. Limatola/INAF-Capodimonte Observatory",
       "termsUrl": "https://www.eso.org/public/outreach/copyright/",
       "registrationMode": "field-stars",
-      "registrationDetection": { "sourceMaximum": 8000, "referenceMaximum": 8000, "maximumStars": 12000 },
+      "registrationDetection": {
+        "sourceMaximum": 8000,
+        "referenceMaximum": 8000,
+        "maximumStars": 12000
+      },
       "stellarTreatment": "preserve",
       "wcs": {
         "projection": "TAN",
         "coordinateFrame": "ICRS",
-        "referenceDimension": [1280, 1280],
-        "referencePixel": [633.141898442, 623.135269606],
-        "referenceValueDeg": [201.696944, -47.479539],
-        "scaleDeg": [-0.00066245096, 0.00066245096],
+        "referenceDimension": [
+          1280,
+          1280
+        ],
+        "referencePixel": [
+          633.141898442,
+          623.135269606
+        ],
+        "referenceValueDeg": [
+          201.696944,
+          -47.479539
+        ],
+        "scaleDeg": [
+          -0.00066245096,
+          0.00066245096
+        ],
         "rotationDeg": 0.00051173061
       },
       "metadataNote": "Exact embedded AVM WCS from the downloaded native TIFF, including its 1280-pixel reference grid and noncentral reference pixel. The AVM sky reference is not the raster centre. Native 14540x14540; the ignored derivative is an 8192px WebP. Relative alignment is tested against WFI; absolute astrometry remains publisher metadata."
@@ -51,22 +79,44 @@
       "page": "https://www.eso.org/public/images/eso0844a/",
       "width": 8040,
       "height": 7560,
-      "fieldArcminutes": [31.88, 29.99],
-      "centerIcrsDegrees": [201.69716666666667, -47.479683333333334],
+      "fieldArcminutes": [
+        31.88,
+        29.99
+      ],
+      "centerIcrsDegrees": [
+        201.69716666666667,
+        -47.479683333333334
+      ],
       "northRightDegrees": 0.00724264734,
       "bands": "Optical B (451nm) / V (539nm) / I (783nm)",
       "credit": "ESO",
       "termsUrl": "https://www.eso.org/public/outreach/copyright/",
       "registrationMode": "field-stars",
-      "registrationDetection": { "sourceMaximum": 8000, "referenceMaximum": 8000, "maximumStars": 12000 },
+      "registrationDetection": {
+        "sourceMaximum": 8000,
+        "referenceMaximum": 8000,
+        "maximumStars": 12000
+      },
       "stellarTreatment": "preserve",
       "wcs": {
         "projection": "TAN",
         "coordinateFrame": "ICRS",
-        "referenceDimension": [1280, 1204],
-        "referencePixel": [620.447024342, 636.048276073],
-        "referenceValueDeg": [201.697148, -47.479684],
-        "scaleDeg": [-0.00041507559, 0.00041507559],
+        "referenceDimension": [
+          1280,
+          1204
+        ],
+        "referencePixel": [
+          620.447024342,
+          636.048276073
+        ],
+        "referenceValueDeg": [
+          201.697148,
+          -47.479684
+        ],
+        "scaleDeg": [
+          -0.00041507559,
+          0.00041507559
+        ],
         "rotationDeg": -0.00724264734
       },
       "metadataNote": "Exact embedded AVM WCS from the downloaded native TIFF, including its 1280x1204 reference grid and noncentral reference pixel. Independent telescope/instrument/epoch from VST/OmegaCAM. Publisher notes Digitized Sky Survey data fills some gaps in this mosaic; DSS-filled regions are not independently attributed star detections."
diff --git a/src/objects/omega-centauri/source/delivery.json b/src/objects/omega-centauri-volume/source/delivery.json
similarity index 89%
rename from src/objects/omega-centauri/source/delivery.json
rename to src/objects/omega-centauri-volume/source/delivery.json
index a413b60bba7..1903f9a837d 100644
--- a/src/objects/omega-centauri/source/delivery.json
+++ b/src/objects/omega-centauri-volume/source/delivery.json
@@ -1,9 +1,9 @@
 {
   "schema": "cssearth-nebula-delivery@2",
-  "id": "omega-centauri",
+  "id": "omega-centauri-volume",
   "method": "compiler",
   "request": {
-    "path": "src/objects/omega-centauri/source/request.json"
+    "path": "src/objects/omega-centauri-volume/source/request.json"
   },
   "inputPins": [
     {
@@ -38,7 +38,7 @@
   "acceptedLabResult": "omega-centauri",
   "compactMethod": "compiler",
   "compactInputs": {
-    "path": "src/objects/omega-centauri/source/bake-inputs.json.gz"
+    "path": "src/objects/omega-centauri-volume/source/bake-inputs.json.gz"
   },
   "qualification": {
     "status": "app-integration-candidate",
diff --git a/src/objects/omega-centauri-volume/source/manifest.json b/src/objects/omega-centauri-volume/source/manifest.json
new file mode 100644
index 00000000000..44188f64298
--- /dev/null
+++ b/src/objects/omega-centauri-volume/source/manifest.json
@@ -0,0 +1,221 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "eso1119b",
+      "path": ".local/nebula-lab/observations/omega-centauri/sources/eso1119b.tif",
+      "origin": "https://www.eso.org/public/images/eso1119b/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1119b/",
+      "title": "Omega Centauri · VST/OmegaCAM · optical",
+      "credit": "ESO/INAF-VST/OmegaCAM. Acknowledgement: A. Grado, L. Limatola/INAF-Capodimonte Observatory",
+      "displayCredit": "ESO/INAF-VST/OmegaCAM. Acknowledgement: A. Grado, L. Limatola/INAF-Capodimonte Observatory",
+      "acquisition": "Unchanged native publisher TIFF restored through the pinned observation recipe. Integrated starlight is preserved. Embedded AVM includes the original reference grid and noncentral reference pixel; absolute astrometry remains publisher metadata.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1119b",
+            "role": "material",
+            "evidence": "src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json#/images/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso1119b",
+      "license": "ESO image-use terms: https://www.eso.org/public/outreach/copyright/; retain the complete credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vst",
+            "evidence": "https://www.eso.org/public/images/eso1119b/"
+          }
+        ],
+        "observation": {
+          "id": "eso1119b",
+          "target": "Omega Centauri",
+          "observedAt": null,
+          "instrument": "OmegaCAM",
+          "bands": "Optical G (480nm) / R (625nm) / I (770nm)",
+          "evidence": "src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json#/images/0; capture date is not inferred from the publication date."
+        }
+      }
+    },
+    {
+      "id": "eso0844a",
+      "path": ".local/nebula-lab/observations/omega-centauri/sources/eso0844a.tif",
+      "origin": "https://www.eso.org/public/images/eso0844a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso0844a/",
+      "title": "Omega Centauri · MPG/ESO 2.2-m WFI · optical",
+      "credit": "ESO",
+      "displayCredit": "ESO",
+      "acquisition": "Unchanged native publisher TIFF restored through the pinned observation recipe. Integrated starlight is preserved. Embedded AVM includes the original reference grid and noncentral reference pixel; absolute astrometry remains publisher metadata.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso0844a",
+            "role": "material",
+            "evidence": "src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json#/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "eso0844a",
+      "license": "ESO image-use terms: https://www.eso.org/public/outreach/copyright/; retain the complete credit.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "mpg-eso-2-2m",
+            "evidence": "https://www.eso.org/public/images/eso0844a/"
+          }
+        ],
+        "observation": {
+          "id": "eso0844a",
+          "target": "Omega Centauri",
+          "observedAt": null,
+          "instrument": "Wide Field Imager (WFI)",
+          "bands": "Optical B (451nm) / V (539nm) / I (783nm)",
+          "evidence": "src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json#/images/1; capture date is not inferred from the publication date."
+        }
+      }
+    },
+    {
+      "id": "physical-evidence",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/04-physical-evidence.json",
+      "origin": "https://doi.org/10.1093/mnras/sts426",
+      "sourceUrl": "https://doi.org/10.1093/mnras/sts426",
+      "title": "Omega Centauri source evidence and model limits",
+      "credit": "D’Souza & Rix (2013); source interpretation by cssEarth",
+      "acquisition": "Byte-identical application copy of the physical-evidence ledger. The hash identifies this curated record; individual publications retain their own download identities and access qualifications.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "dsouza-rix-2013",
+            "role": "method",
+            "evidence": "src/objects/omega-centauri-volume/source/bake-inputs/references/04-physical-evidence.json"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "photometric-mge",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/02-photometric-mge.json",
+      "origin": "https://doi.org/10.1093/mnras/sts426",
+      "sourceUrl": "https://doi.org/10.1093/mnras/sts426",
+      "title": "Omega Centauri published MGE and explicit transport choices",
+      "credit": "D’Souza & Rix (2013); source interpretation by cssEarth",
+      "acquisition": "Byte-identical recipe copy. Published angular widths are converted from arcmin to arcsec; the recipe pins the complete source PDF and evidence ledger. Near/far sign and six-sigma cutoff are authored.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "dsouza-rix-2013",
+            "role": "method",
+            "evidence": "src/objects/omega-centauri-volume/source/bake-inputs/references/02-photometric-mge.json"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "distance",
+      "path": "src/objects/omega-centauri-volume/source/nebula.json",
+      "origin": "https://doi.org/10.1093/mnras/stab1474",
+      "sourceUrl": "https://doi.org/10.1093/mnras/stab1474",
+      "title": "Omega Centauri adopted cluster distance",
+      "credit": "Baumgardt & Vasiliev (2021); source interpretation by cssEarth",
+      "acquisition": "Source-owned catalogue record preserves the exact 5426 +/-47 pc value and full-paper download pin. This file hash identifies the catalogue record, not the remote paper.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "baumgardt-vasiliev-2021",
+            "role": "method",
+            "evidence": "src/objects/omega-centauri-volume/source/nebula.json"
+          }
+        ]
+      },
+      "dependencies": []
+    }
+  ],
+  "documents": [
+    {
+      "id": "recipe-compiler",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/01-compiler.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical source-owned scientific processing recipe; external input identities are retained in its content and the selected input records."
+      }
+    },
+    {
+      "id": "recipe-observation-structures",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/03-observation-structures.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical source-owned scientific processing recipe; external input identities are retained in its content and the selected input records."
+      }
+    },
+    {
+      "id": "recipe-observations",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical source-owned scientific processing recipe; external input identities are retained in its content and the selected input records."
+      }
+    },
+    {
+      "id": "compact-inputs",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs.json.gz",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Pinned pre-slice emission field, per-component materials and adaptive sampling; no derived runtime textures. Quantitative handoff qualification remains failed."
+      }
+    },
+    {
+      "id": "provenance-references",
+      "path": "src/objects/omega-centauri-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Maps source-owned evidence bytes to their exact published research revision."
+      }
+    },
+    {
+      "id": "replay-references",
+      "path": "src/objects/omega-centauri-volume/source/replay-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Maps retained research input identities to the application-owned copies."
+      }
+    },
+    {
+      "id": "document-request",
+      "path": "src/objects/omega-centauri-volume/source/request.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned application candidate recipe or presentation; qualification and published source identities are recorded explicitly."
+      }
+    },
+    {
+      "id": "document-delivery",
+      "path": "src/objects/omega-centauri-volume/source/delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned application candidate recipe or presentation; qualification and published source identities are recorded explicitly."
+      }
+    },
+    {
+      "id": "document-presentation",
+      "path": "src/objects/omega-centauri-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned application candidate recipe or presentation; qualification and published source identities are recorded explicitly."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/omega-centauri/source/nebula.json b/src/objects/omega-centauri-volume/source/nebula.json
similarity index 98%
rename from src/objects/omega-centauri/source/nebula.json
rename to src/objects/omega-centauri-volume/source/nebula.json
index 5b51f2ca32c..5e2fe076a3c 100644
--- a/src/objects/omega-centauri/source/nebula.json
+++ b/src/objects/omega-centauri-volume/source/nebula.json
@@ -64,7 +64,7 @@
         "sourceRef": "dsouza-rix-2013"
       },
       "status": "confirmed",
-      "detailedObjectId": "omega-centauri"
+      "detailedObjectId": "omega-centauri-volume"
     }
   ]
 }
diff --git a/src/objects/omega-centauri/source/presentation.json b/src/objects/omega-centauri-volume/source/presentation.json
similarity index 85%
rename from src/objects/omega-centauri/source/presentation.json
rename to src/objects/omega-centauri-volume/source/presentation.json
index 3f8e031e5f9..7ab44bdf6c5 100644
--- a/src/objects/omega-centauri/source/presentation.json
+++ b/src/objects/omega-centauri-volume/source/presentation.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "omega-centauri",
+  "objectId": "omega-centauri-volume",
   "name": "Omega Centauri",
   "defaultDataset": "eso1119b",
   "sharedInputs": [
@@ -83,31 +83,31 @@
   "recipes": [
     {
       "id": "request",
-      "path": "src/objects/omega-centauri/source/request.json"
+      "path": "src/objects/omega-centauri-volume/source/request.json"
     },
     {
       "id": "recipe-1",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/01-compiler.json"
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/01-compiler.json"
     },
     {
       "id": "recipe-2",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/02-photometric-mge.json"
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/02-photometric-mge.json"
     },
     {
       "id": "recipe-3",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/03-observation-structures.json"
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/03-observation-structures.json"
     },
     {
       "id": "recipe-4",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/04-physical-evidence.json"
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/04-physical-evidence.json"
     },
     {
       "id": "recipe-5",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/05-observations.json"
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json"
     },
     {
       "id": "delivery",
-      "path": "src/objects/omega-centauri/source/delivery.json"
+      "path": "src/objects/omega-centauri-volume/source/delivery.json"
     }
   ],
   "inputEvidence": [
@@ -123,6 +123,6 @@
     }
   ],
   "bank": {
-    "path": "src/objects/omega-centauri/prepared/datasets.json"
+    "path": "src/objects/omega-centauri-volume/prepared/datasets.json"
   }
 }
diff --git a/src/objects/omega-centauri/source/provenance-references.json b/src/objects/omega-centauri-volume/source/provenance-references.json
similarity index 54%
rename from src/objects/omega-centauri/source/provenance-references.json
rename to src/objects/omega-centauri-volume/source/provenance-references.json
index 36c5af46452..b72a4d40d77 100644
--- a/src/objects/omega-centauri/source/provenance-references.json
+++ b/src/objects/omega-centauri-volume/source/provenance-references.json
@@ -3,27 +3,27 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/omega-centauri/compiler.json",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/01-compiler.json",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/01-compiler.json",
       "bytes": 1361
     },
     {
       "originalPath": "labs/nebula/models/omega-centauri/photometric-mge.json",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/02-photometric-mge.json",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/02-photometric-mge.json",
       "bytes": 2508
     },
     {
       "originalPath": "labs/nebula/models/omega-centauri/observation-structures.json",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/03-observation-structures.json",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/03-observation-structures.json",
       "bytes": 397
     },
     {
       "originalPath": "labs/nebula/models/omega-centauri/physical-evidence.json",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/04-physical-evidence.json",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/04-physical-evidence.json",
       "bytes": 36711
     },
     {
       "originalPath": "labs/nebula/models/omega-centauri/observations.json",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/05-observations.json",
+      "path": "src/objects/omega-centauri-volume/source/bake-inputs/references/05-observations.json",
       "bytes": 3842
     }
   ]
diff --git a/src/objects/omega-centauri/source/replay-references.json b/src/objects/omega-centauri-volume/source/replay-references.json
similarity index 100%
rename from src/objects/omega-centauri/source/replay-references.json
rename to src/objects/omega-centauri-volume/source/replay-references.json
diff --git a/src/objects/omega-centauri/source/request.json b/src/objects/omega-centauri-volume/source/request.json
similarity index 100%
rename from src/objects/omega-centauri/source/request.json
rename to src/objects/omega-centauri-volume/source/request.json
diff --git a/src/objects/omega-centauri/README.md b/src/objects/omega-centauri/README.md
index 5b70d7de614..8e46103b0f8 100644
--- a/src/objects/omega-centauri/README.md
+++ b/src/objects/omega-centauri/README.md
@@ -1,65 +1,16 @@
-# Omega Centauri (NGC 5139)
+# Omega Centauri
 
-Omega Centauri is shown as a volume of 149 XYZ slabs with stellar light baked
-into them, and one shared geometry bank for both optical datasets. The app keeps
-493 elements, inside the 500-element limit. **Visual acceptance remains
-blocked:** the result fails the fixed axis-handoff image gate and is an
-integration candidate.
+Omega Centauri as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Omega Centauri volume](../omega-centauri-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Dataset | Native image and coverage |
-| --- | --- |
-| [VST/OmegaCAM, eso1119b](https://www.eso.org/public/images/eso1119b/) | G/R/I display composite; 14540 × 14540 pixels; 50.88′ square. Selected geometry/light reference. |
-| [MPG/ESO 2.2-m WFI, eso0844a](https://www.eso.org/public/images/eso0844a/) | B/V/I display composite; 8040 × 7560 pixels; 31.88′ × 29.99′. Same model geometry, different image material. Two mosaic gaps contain publisher-supplied DSS data. |
-
-The [source manifest](source/manifest.json) keeps exact image identities, full
-credits and ESO's reuse terms. Published display colors do not establish natural
-color or calibrated luminosity.
-
-The [MGE recipe](source/bake-inputs/references/02-photometric-mge.json) uses the
-eight projected Gaussians in [D’Souza & Rix (2013), Table 1](https://doi.org/10.1093/mnras/sts426),
-with inclination 50° and photometric major-axis PA 100° east of north. The
-[5426 ± 47 pc distance](https://doi.org/10.1093/mnras/stab1474) is the combined
-NGC 5139 distance in Baumgardt & Vasiliev (2021), Table 2. It locates the
-cluster, not individual stars. Competing fits and the rejected spherical
-King-Abel experiment are in the [physical evidence](source/bake-inputs/references/04-physical-evidence.json).
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/omega-centauri.json) cites the position, distance and velocity that place it.
 
 ## Processing
 
-A smooth oblate MGE envelope carries broad integrated starlight. Finite positive
-image residuals receive conditional depths and dataset-specific materials. Both
-optical datasets use the same geometry, and no separate star layer counts the
-light twice. The [method account](../../../labs/nebula/models/omega-centauri/README.md)
-explains the numerical choices.
-
-The compiler reserves renderer copies and overhead before allocating slabs. It
-keeps **X 48, Y 45, Z 56**, so the app holds 447 slab elements, 26 impostors
-and 20 wrappers. All 4,085 fitted emission features, the photometric envelope,
-registration and optical materials are kept. The source-owned
-[compact input](source/bake-inputs.json.gz) replays without the Lab, caches or
-network. The [delivery recipe](source/delivery.json) records the failed visual
-qualification; `acceptedLabResult` identifies this candidate, not an acceptance
-certificate. Shared preparation and replay commands are in the
-[nebula guide](../../../docs/nebulae/README.md).
-
-## Evidence
-
-- Replay reproduced all 447 expected raw PNGs and 59 delivery files exactly.
-- Native arrival, orbit, close zoom, galaxy-context return and both dataset switches each keep exactly 493 elements. Arrival framing is 204.5516 pixels in a 1440 × 1000 viewport.
-- All 1,040 reference depth cells stay integrated, but on fewer slabs: estimated axis errors are 10.5–10.7% against a 1% target, and front views are 23–25% brighter than the previous 459-slab bank.
-- Neutral X/Z and Y/Z handoff L1 is **0.131881 / 0.125192**, above the **0.04** limit. All nine tested dataset/axis pairs fail it; brightness disagreement between axes stays below 5%.
-
-The [descriptor](object.json) and [inventory](inventory.json) pin the delivery.
+1. `pnpm prepare:objects --object=omega-centauri` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts omega-centauri` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- Axis-handoff image stability is outside the acceptance limits. Earlier Lab inspection also exposed a false grid and an oblique compositor rectangle.
-- Desktop GPU performance has not been measured.
-- The shared zoom minimum is **0.05 framing radii (2.17 pc)**. Reaching it does not establish an acceptable close-up view.
-- Near/far tilt and the six-sigma numerical support cutoff are authored. The MGE's coefficient uncertainties are unavailable.
-- Absolute astrometry starts from publisher AVM. Relative image registration does not establish absolute Gaia astrometry or independent WFI detections in DSS-filled gaps.
-- The 512-pixel fit and minimum 5.80-arcsec projected sigma soften native stellar texture. Crowding, saturated cores, seeing and publisher display stretches remain. Fitted light features are not a resolved-star catalogue, dynamical mass map or N-body simulation.
-
-The [investigation ledger](investigations.json) records selected sources,
-alternatives and unresolved acceptance.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/omega-centauri/inventory.json b/src/objects/omega-centauri/inventory.json
index 66a80aeb180..c0be102d49d 100644
--- a/src/objects/omega-centauri/inventory.json
+++ b/src/objects/omega-centauri/inventory.json
@@ -3,387 +3,57 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/eso0844a.webp",
+      "filename": "omega-centauri-dataset-eso0844a.webp",
       "bytes": 74642,
       "sha256": "02ce9f288e4bb7b656153833c64fc41dbdfce9502c8d6780721ee680903aef6b"
     },
     {
       "location": "public",
-      "filename": "datasets/eso1119b.webp",
+      "filename": "omega-centauri-dataset-eso1119b.webp",
       "bytes": 54638,
       "sha256": "6bcfba73ffa33a2f54c81bf3c0a291373a3c50dd13796e52d1eb03647031350c"
     },
     {
       "location": "prepared",
-      "filename": "datasets.json",
-      "bytes": 428635,
-      "sha256": "47b7a90ef2a78a6c26dbc05d3023c6a9bb58c83a2fb0666e66278eed84d1c3c8"
-    },
-    {
-      "location": "prepared",
-      "filename": "delivery.json",
-      "bytes": 2151,
-      "sha256": "3dfd50ca17bee0da9836091dee54cc16780efdace5c13a375c9fc2e55bfe5c98"
-    },
-    {
-      "location": "prepared",
-      "filename": "eso0844a/atlases/x.webp",
-      "bytes": 630850,
-      "sha256": "2be14d24b7b8c9207982a44d0257d2d33e9e2f4c6f1a20e11e8e83a2d419ff3e"
-    },
-    {
-      "location": "prepared",
-      "filename": "eso0844a/atlases/y.webp",
-      "bytes": 588746,
-      "sha256": "f378d5167d5c82e2779c3507a67f5f3cc7d3cd67e8396a70a5e8d47d0bca3247"
+      "filename": "content.json",
+      "bytes": 2765,
+      "sha256": "9bac3efd92d01e91a6f354c58d4551a13be00c81469105db00663a51510e7a4e"
     },
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       "location": "prepared",
-      "filename": "eso0844a/atlases/z.webp",
-      "bytes": 619926,
-      "sha256": "f2cfe0f147d8dd07d66be1acb6442c9898e52a37426ed332818e704111ba2a6a"
+      "filename": "controls.json",
+      "bytes": 716,
+      "sha256": "a4fdd9177f143bc46a15aa4af82d0d7dd645de877d8c04ec403f14a5d22f61a2"
     },
     {
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-      "bytes": 12813,
-      "sha256": "4156c57dd44f146b3de1b146f31da37f676ef5ca97c388fc03d3442064c3fcae"
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diff --git a/src/objects/omega-centauri/object.json b/src/objects/omega-centauri/object.json
index 8378d6e44db..bb64a8bdc9f 100644
--- a/src/objects/omega-centauri/object.json
+++ b/src/objects/omega-centauri/object.json
@@ -1,42 +1,97 @@
 {
   "schema": "cssearth-object@2",
   "id": "omega-centauri",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
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+      "schema": "cssearth-object-preparation@1",
+      "label": "Omega Centauri",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
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+      "surfaces": [],
+      "shape": {
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+        "radiusKm": 1339334776590029.8
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+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Omega Centauri",
+      "systemName": "Milky Way",
+      "classification": "globular-cluster",
+      "color": "#9a9a9a",
+      "distanceAu": 1119192839,
+      "description": "Omega Centauri is a globular star cluster in the Milky Way, about 5,426 parsecs away.",
+      "aliases": [
+        "NGC 5139",
+        "ω Centauri",
+        "Caldwell 80"
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   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/omega-centauri/source/content/object.json b/src/objects/omega-centauri/source/content/object.json
new file mode 100644
index 00000000000..0042b5e255d
--- /dev/null
+++ b/src/objects/omega-centauri/source/content/object.json
@@ -0,0 +1,113 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "omega-centauri",
+  "displayName": "Omega Centauri",
+  "panel": {
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+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "5.426 kpc (\u221247 / +47 pc)",
+        "source": {
+          "catalogueId": "baumgardt-vasiliev-2021-gc-distances",
+          "url": "https://arxiv.org/pdf/2105.09526",
+          "label": "Baumgardt & Vasiliev (2021), Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data, Table 2, NGC 5139: combined distance 5.426 +/- 0.047 kpc. Full downloaded paper bytes.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 201.7\u00b0, Dec -47.48\u00b0",
+        "source": {
+          "catalogueId": "eso-eso1119b",
+          "url": "https://cdn.eso.org/images/original/eso1119b.tif",
+          "label": "ESO/INAF-VST/OmegaCAM eso1119b native TIFF and embedded AVM. The common observation-frame center is an adopted registration origin, not a new dynamical centroid measurement.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "classification",
+        "label": "Classification",
+        "value": "Globular stellar cluster",
+        "source": {
+          "catalogueId": "dsouza-rix-2013",
+          "url": "https://wwwmpa.mpa-garching.mpg.de/mpa/publications/preprints/pp2013/MPA3537.pdf",
+          "label": "D\u2019Souza & Rix (2013), Mass estimates from stellar proper motions: the mass of omega Centauri, Table 1 and section 4.3. Eight projected Gaussian components define a conditional oblate light prior, not resolved stellar depths.",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
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+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "eso1119b",
+    "controls": [
+      {
+        "id": "eso1119b",
+        "label": "VST \u00b7 optical G / R / I",
+        "thumbnail": "omega-centauri-dataset-eso1119b.webp",
+        "volume": {
+          "objectId": "omega-centauri-volume",
+          "datasetId": "eso1119b",
+          "surface": "eso1119b"
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+          "id": "omega-centauri-volume-eso1119b",
+          "path": "../../omega-centauri-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1119b/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "eso0844a",
+        "label": "WFI \u00b7 optical B / V / I",
+        "thumbnail": "omega-centauri-dataset-eso0844a.webp",
+        "volume": {
+          "objectId": "omega-centauri-volume",
+          "datasetId": "eso0844a",
+          "surface": "eso0844a"
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+          "id": "omega-centauri-volume-eso0844a",
+          "path": "../../omega-centauri-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso0844a/"
+        },
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+  "settings": {
+    "titleKey": "settings",
+    "controls": []
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+  "resources": [
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+      "href": "https://arxiv.org/pdf/2105.09526"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "ESO/INAF-VST/OmegaCAM eso1119b native TIFF and embedded AVM. The common observation-frame center is an adopted registration origin, not a new dynamical centroid measurement.",
+      "href": "https://cdn.eso.org/images/original/eso1119b.tif"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "D\u2019Souza & Rix (2013), Mass estimates from stellar proper motions: the mass of omega Centauri, Table 1 and section 4.3. Eight projected Gaussian components define a conditional oblate light prior, not resolved stellar depths.",
+      "href": "https://wwwmpa.mpa-garching.mpg.de/mpa/publications/preprints/pp2013/MPA3537.pdf"
+    }
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+  "provenance": {
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+      "credit": "Baumgardt & Vasiliev (2021), Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data, Table 2, NGC 5139: combined distance 5.426 +/- 0.047 kpc. Full downloaded paper bytes."
+    }
+  }
+}
diff --git a/src/objects/omega-centauri/source/manifest.json b/src/objects/omega-centauri/source/manifest.json
index 0568a86ca37..c115eebe08c 100644
--- a/src/objects/omega-centauri/source/manifest.json
+++ b/src/objects/omega-centauri/source/manifest.json
@@ -1,221 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
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-      "path": ".local/nebula-lab/observations/omega-centauri/sources/eso1119b.tif",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://www.eso.org/public/images/eso1119b/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1119b/",
-      "title": "Omega Centauri · VST/OmegaCAM · optical",
-      "credit": "ESO/INAF-VST/OmegaCAM. Acknowledgement: A. Grado, L. Limatola/INAF-Capodimonte Observatory",
-      "displayCredit": "ESO/INAF-VST/OmegaCAM. Acknowledgement: A. Grado, L. Limatola/INAF-Capodimonte Observatory",
-      "acquisition": "Unchanged native publisher TIFF restored through the pinned observation recipe. Integrated starlight is preserved. Embedded AVM includes the original reference grid and noncentral reference pixel; absolute astrometry remains publisher metadata.",
-      "sourceBinding": {
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-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "eso1119b",
+      "credit": "ESO/INAF-VST/OmegaCAM. Acknowledgement: A. Grado, L. Limatola/INAF-Capodimonte Observatory; the default dataset's picture as the Omega Centauri bank publishes it, saved by site/build/prepare/companion-context.mts",
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-      "credit": "ESO",
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-      "acquisition": "Unchanged native publisher TIFF restored through the pinned observation recipe. Integrated starlight is preserved. Embedded AVM includes the original reference grid and noncentral reference pixel; absolute astrometry remains publisher metadata.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
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-            "evidence": "https://www.eso.org/public/images/eso0844a/"
-          }
-        ],
-        "observation": {
-          "id": "eso0844a",
-          "target": "Omega Centauri",
-          "observedAt": null,
-          "instrument": "Wide Field Imager (WFI)",
-          "bands": "Optical B (451nm) / V (539nm) / I (783nm)",
-          "evidence": "src/objects/omega-centauri/source/bake-inputs/references/05-observations.json#/images/1; capture date is not inferred from the publication date."
-        }
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/omega-centauri-volume/source/manifest.json)."
       }
-    },
-    {
-      "id": "physical-evidence",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/04-physical-evidence.json",
-      "origin": "https://doi.org/10.1093/mnras/sts426",
-      "sourceUrl": "https://doi.org/10.1093/mnras/sts426",
-      "title": "Omega Centauri source evidence and model limits",
-      "credit": "D’Souza & Rix (2013); source interpretation by cssEarth",
-      "acquisition": "Byte-identical application copy of the physical-evidence ledger. The hash identifies this curated record; individual publications retain their own download identities and access qualifications.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "dsouza-rix-2013",
-            "role": "method",
-            "evidence": "src/objects/omega-centauri/source/bake-inputs/references/04-physical-evidence.json"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "photometric-mge",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/02-photometric-mge.json",
-      "origin": "https://doi.org/10.1093/mnras/sts426",
-      "sourceUrl": "https://doi.org/10.1093/mnras/sts426",
-      "title": "Omega Centauri published MGE and explicit transport choices",
-      "credit": "D’Souza & Rix (2013); source interpretation by cssEarth",
-      "acquisition": "Byte-identical recipe copy. Published angular widths are converted from arcmin to arcsec; the recipe pins the complete source PDF and evidence ledger. Near/far sign and six-sigma cutoff are authored.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "dsouza-rix-2013",
-            "role": "method",
-            "evidence": "src/objects/omega-centauri/source/bake-inputs/references/02-photometric-mge.json"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "distance",
-      "path": "src/objects/omega-centauri/source/nebula.json",
-      "origin": "https://doi.org/10.1093/mnras/stab1474",
-      "sourceUrl": "https://doi.org/10.1093/mnras/stab1474",
-      "title": "Omega Centauri adopted cluster distance",
-      "credit": "Baumgardt & Vasiliev (2021); source interpretation by cssEarth",
-      "acquisition": "Source-owned catalogue record preserves the exact 5426 +/-47 pc value and full-paper download pin. This file hash identifies the catalogue record, not the remote paper.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "baumgardt-vasiliev-2021",
-            "role": "method",
-            "evidence": "src/objects/omega-centauri/source/nebula.json"
-          }
-        ]
-      },
-      "dependencies": []
     }
   ],
   "documents": [
     {
-      "id": "recipe-compiler",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/01-compiler.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical source-owned scientific processing recipe; external input identities are retained in its content and the selected input records."
-      }
-    },
-    {
-      "id": "recipe-observation-structures",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/03-observation-structures.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Byte-identical source-owned scientific processing recipe; external input identities are retained in its content and the selected input records."
-      }
-    },
-    {
-      "id": "recipe-observations",
-      "path": "src/objects/omega-centauri/source/bake-inputs/references/05-observations.json",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Byte-identical source-owned scientific processing recipe; external input identities are retained in its content and the selected input records."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "id": "compact-inputs",
-      "path": "src/objects/omega-centauri/source/bake-inputs.json.gz",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Pinned pre-slice emission field, per-component materials and adaptive sampling; no derived runtime textures. Quantitative handoff qualification remains failed."
+        "reason": "Project-authored framing: the radius the page frames the object at, a presentation value."
       }
     },
     {
-      "id": "provenance-references",
-      "path": "src/objects/omega-centauri/source/provenance-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Maps source-owned evidence bytes to their exact published research revision."
-      }
-    },
-    {
-      "id": "replay-references",
-      "path": "src/objects/omega-centauri/source/replay-references.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Maps retained research input identities to the application-owned copies."
-      }
-    },
-    {
-      "id": "document-request",
-      "path": "src/objects/omega-centauri/source/request.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned application candidate recipe or presentation; qualification and published source identities are recorded explicitly."
-      }
-    },
-    {
-      "id": "document-delivery",
-      "path": "src/objects/omega-centauri/source/delivery.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned application candidate recipe or presentation; qualification and published source identities are recorded explicitly."
-      }
-    },
-    {
-      "id": "document-presentation",
-      "path": "src/objects/omega-centauri/source/presentation.json",
-      "sourceBinding": {
-        "kind": "local",
-        "reason": "Object-owned application candidate recipe or presentation; qualification and published source identities are recorded explicitly."
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/omega-centauri/source/preparation/navigation.json b/src/objects/omega-centauri/source/preparation/navigation.json
new file mode 100644
index 00000000000..92bd9ac470e
--- /dev/null
+++ b/src/objects/omega-centauri/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "omega-centauri",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/omega-centauri/source/presentation/context.png b/src/objects/omega-centauri/source/presentation/context.png
new file mode 100644
index 00000000000..58af3d87e16
Binary files /dev/null and b/src/objects/omega-centauri/source/presentation/context.png differ
diff --git a/src/objects/omega-centauri/source/presentation/solar-system.json b/src/objects/omega-centauri/source/presentation/solar-system.json
new file mode 100644
index 00000000000..7c8f827d7c2
--- /dev/null
+++ b/src/objects/omega-centauri/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "omega-centauri",
+  "displayName": "Omega Centauri",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 1339334776590029.8,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/omega-centauri/text.json b/src/objects/omega-centauri/text.json
new file mode 100644
index 00000000000..6d3dbd8b062
--- /dev/null
+++ b/src/objects/omega-centauri/text.json
@@ -0,0 +1,58 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "omega-centauri",
+  "card": {
+    "text": "Omega Centauri is a globular star cluster in the Milky Way, about 5,426 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "baumgardt-vasiliev-2021-gc-distances",
+        "url": "https://arxiv.org/pdf/2105.09526",
+        "label": "Baumgardt & Vasiliev (2021), Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data, Table 2, NGC 5139: combined distance 5.426 +/- 0.047 kpc. Full downloaded paper bytes.",
+        "checked": "2026-10-01",
+        "locator": "distance: 5.426 kpc (−47 / +47 pc)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "Omega Centauri is a globular star cluster in the Milky Way, about 5,426 parsecs away. That published distance locates the cluster, not its individual stars.",
+    "sources": [
+      {
+        "catalogueId": "baumgardt-vasiliev-2021-gc-distances",
+        "url": "https://arxiv.org/pdf/2105.09526",
+        "label": "Baumgardt & Vasiliev (2021), Accurate distances to Galactic globular clusters through a combination of Gaia EDR3, HST and literature data, Table 2, NGC 5139: combined distance 5.426 +/- 0.047 kpc. Full downloaded paper bytes.",
+        "checked": "2026-10-01",
+        "locator": "distance: 5.426 kpc (−47 / +47 pc)"
+      }
+    ]
+  },
+  "datasets": {
+    "eso1119b": {
+      "title": "Omega Centauri in the wider VST field",
+      "detail": "14540 × 14540 px",
+      "summary": "Integrated optical starlight with conditional oblate depth; individual stellar positions are not recovered.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1119b",
+          "url": "https://www.eso.org/public/images/eso1119b/",
+          "label": "Omega Centauri · VST/OmegaCAM · optical; ESO/INAF-VST/OmegaCAM. Acknowledgement: A. Grado, L. Limatola/INAF-Capodimonte Observatory",
+          "checked": "2026-10-01",
+          "locator": "Omega Centauri · VST/OmegaCAM · optical"
+        }
+      ]
+    },
+    "eso0844a": {
+      "title": "Omega Centauri in the WFI mosaic",
+      "detail": "8040 × 7560 px",
+      "summary": "A second optical view on the same conditional geometry, limited to the WFI mosaic footprint.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso0844a",
+          "url": "https://www.eso.org/public/images/eso0844a/",
+          "label": "Omega Centauri · MPG/ESO 2.2-m WFI · optical; ESO",
+          "checked": "2026-10-01",
+          "locator": "Omega Centauri · MPG/ESO 2.2-m WFI · optical"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/smc-volume/README.md b/src/objects/smc-volume/README.md
new file mode 100644
index 00000000000..7a77d995911
--- /dev/null
+++ b/src/objects/smc-volume/README.md
@@ -0,0 +1,47 @@
+# Small Magellanic Cloud (SMC)
+
+Five published images colour one shared three-dimensional emission model; **Horálek optical is the default**. Each dataset carries the same 272 directional slices (80 x, 64 y, 128 z), packed into three WebP axis atlases, and the same 1,803 catalogue stars. Switching datasets changes colour and never geometry. Nothing here measures gas or dust depth.
+
+The shape is a hypothesis with two parts. A broad envelope carries 82.79% of the image light along the depth distribution of a **VMC-constrained ellipsoid**, and 476 fitted detail components sit at conditional modes of the **Garver stellar simulation** along their own sightlines. Catalogue-star depths are realizations inside that model, not distances.
+
+## Sources
+
+| Source / dataset | Role and selected input |
+| --- | --- |
+| [Tatton et al. (2021) red clump](https://doi.org/10.1093/mnras/staa3857) with [ESO VMC DR5.1 PSF photometry](https://www.eso.org/rm/api/v1/public/releaseDescriptions/155) | 489,760 observed tracers constrain the envelope shape; their distances are standard-candle estimates, not geometry. |
+| [Garver, Nidever, Debattista & Deg simulation](https://doi.org/10.5061/dryad.1vhhmgr82) | 225,000 stellar particles supply conditional line-of-sight modes for the detail components. |
+| [Horálek optical, iotw2615a](https://noirlab.edu/public/images/iotw2615a/) | 6069 × 4045-pixel wide-field photograph; also the baseline the emission model was fitted to. |
+| [ESO VISTA, eso1714a](https://www.eso.org/public/images/eso1714a/) | Y/J/Ks near-infrared display; 4000 × 3540 pixels. |
+| [SMASH, noirlab2030b](https://noirlab.edu/public/images/noirlab2030b/) | DECam g/r/i/z optical survey image, 3827 × 3190 pixels; also the publisher sky anchor every relative registration is matched to. |
+| [DSS2, heic0514c](https://esahubble.org/images/heic0514c/) | 13096 × 13616-pixel photographic plate composite; narrower footprint than VISTA or SMASH. |
+| [AllWISE colour HiPS through CDS](https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json) | W4/W2/W1 false colour over a 10° TAN field, 4000² pixels; not native detector sampling. |
+| [Bonanos et al. (2010)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/416) | Observed sky positions and Johnson V for 1,803 selected massive stars. |
+| [Nidever et al. (2011)](https://arxiv.org/abs/1104.2594) | [Stellar extent](source/stellar-extent.json): SMC red giants detected out to about 11 kpc. Inside that radius the SMC's caption hides. It marks where stars are still measured, not a boundary. |
+
+None of the images covers the full Bridge, Wing or tidal debris. Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; "included" means used by this delivery, not scientifically validated.
+
+## Processing
+
+1. **Shape.** The simulation particles and a Gaussian ellipsoid are each fitted to VMC red-clump sky positions and distance moduli on training regions. Withheld deviance per observed count, lower better: **ellipsoid 0.45749**, affine simulation 0.60119, simulation with bounded regional weights 0.59503. See [`fit.json`](source/evidence/smc/constrained/fit.json), [`fit-evidence.json`](source/evidence/smc/constrained/fit-evidence.json) and [the shape trial](../../../labs/nebula/models/smc/constrained/README.md).
+2. **Emission.** The registered, star-removed Horálek image is smoothed and divided by the integrated ellipsoid column to give an envelope gain, so image brightness scales the envelope but never moves it in depth. The remaining detail is fitted with 476 components at the strongest simulation mode along each ray. [`emission-envelope-ellipsoid.json`](source/evidence/smc/constrained/emission-envelope-ellipsoid.json) is the recipe; [EMISSION-METHOD.md](../../../labs/nebula/models/smc/constrained/EMISSION-METHOD.md) explains the method.
+3. **Datasets.** [`finite-datasets-ellipsoid.json`](source/evidence/smc/constrained/finite-lenses-ellipsoid.json) bakes each registered image onto that one geometry ([appearance receipt](source/lens-settings-evidence.json)). The [compact inputs](source/compact/inputs.json) carry what a replay needs; each delivered byte's laboratory record is under [`bake-inputs/references/`](source/bake-inputs/references).
+4. **Stars.** Table 3 rows with finite V ≤ 16 whose ray lands on covered footprint; each depth inverts the joint emission and ellipsoid density at a fixed per-star quantile. [Star preparation](../../../labs/nebula/models/smc/stars/README.md) records the selection.
+
+`prepared/` is generated, not committed: `pnpm prepare:nebulae --if-missing` rebuilds the bank and its atlases from the compact inputs alone, and the [object descriptor](object.json) pins the result. Application provenance reads the evidence and recipe copies listed in [provenance references](source/provenance-references.json).
+
+## Evidence
+
+- **Fit.** Total front-projection relative squared error 0.006282; projection RMSE 0.01264 after fitting against 0.04694 before. 8 of the 476 components (0.35% of projected light) found no prior support and keep an authored finite depth.
+- **Registration.** The [alignment report](source/evidence/smc/registration/alignment-report.json) qualifies all five shipped images. AllWISE has its own check against 7,172 bright W1 stars; SMASH's absolute solution remains the publisher's.
+- **Stars against images.** Of the 40 brightest stars projected onto each original, those within 1 px of a photographic peak: Horálek 22 (median 0.67 px), DSS2 35 (0.70 px), VISTA 20 (3.12 px), AllWISE 14 (3.84 px), SMASH 9 (5.26 px). Mirroring east–west gives 0 for every image.
+- **App.** Each dataset decodes one texture at the Earth framing, the world camera is unchanged across all five switches, and all 1,803 stars mount and toggle. The side views show line-of-sight extent rather than a flat sheet.
+- **Replay.** From a removed `prepared/`, all 1,360 regenerated slice textures are byte-identical to the promotion output.
+
+## Known problems
+
+- The envelope is the ellipsoid's shape hypothesis and the detail components are conditioned on the simulation that the same VMC comparison disfavours. The two carry different depth hypotheses, and neither is measured gas geometry. The model records `materialGatePassed: false`.
+- Photometric red-clump distances include intrinsic luminosity scatter, photometric error, reddening uncertainty and contamination, and have not been deconvolved into geometric depth. Large-scale extensions outside the survey footprint remain model-dependent.
+- Faint concentric ripples remain in the outer halo where alpha is still quantized. Detail resolution is bounded by the 384-pixel fit and 128 slabs.
+- Star removal leaves crowded and saturated stars and can remove compact nebular light. A bright foreground cluster is masked by an authored exclusion rather than classified.
+- The dust and survey-band lab composites are not shipped: the AllWISE W2 background gradient, W3 Galactic cirrus and scattered light, SPIRE covering only about 26% of the field and uncorrected DSS2 plate-to-plate steps are still present in them.
+- The earlier SMASH image-layer delivery is retired; its [source record](source/provenance.json) and [recipe](source/recipe.json) are kept as documents.
diff --git a/src/objects/smc-volume/inventory.json b/src/objects/smc-volume/inventory.json
new file mode 100644
index 00000000000..af26af2676d
--- /dev/null
+++ b/src/objects/smc-volume/inventory.json
@@ -0,0 +1,929 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "public",
+      "filename": "datasets/smc-allwise-wide.webp",
+      "bytes": 3552,
+      "sha256": "6057861e4424b9a819becefb2f7aa0306bd0e01f913d23e41ffea5b467190506"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/smc-dss2.webp",
+      "bytes": 27364,
+      "sha256": "508f0e2ca7b04ddd63dac86270a7d324ff706aaa49658864c488fbf085cd8f91"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/smc-horalek-wide.webp",
+      "bytes": 19112,
+      "sha256": "fda3435e21b465383e5b67015fc266cb8eeb1ac228958c8f5569774748ebc05c"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/smc-smash.webp",
+      "bytes": 31424,
+      "sha256": "09f5ddfe27b79021873cb66ef5d11374ae31c61feec3c7b5f571211a3ea242d0"
+    },
+    {
+      "location": "public",
+      "filename": "datasets/smc-vista.webp",
+      "bytes": 23910,
+      "sha256": "d1583e13394f881eaa5903b7471bff19df1bcaa4a055ffed0ccc5818b78a22d1"
+    },
+    {
+      "location": "prepared",
+      "filename": "datasets.json",
+      "bytes": 2823516,
+      "sha256": "83eeb184c461491df9d33cda08e9120ac3471e8e88d239bf60cc7898c68660d0"
+    },
+    {
+      "location": "prepared",
+      "filename": "delivery.json",
+      "bytes": 73557,
+      "sha256": "740c10b91cfc82ce1462b1a1222495de16578a4ace48e6a9a93f1befef3db120"
+    },
+    {
+      "location": "prepared",
+      "filename": "presentation.json",
+      "bytes": 7701,
+      "sha256": "98075fb920984613ad2404f266872f5950935ff955ed67106df9a0531ff11f3b"
+    },
+    {
+      "location": "prepared",
+      "filename": "provenance.json",
+      "bytes": 47020,
+      "sha256": "625a05a445cfd67797834a7928ff50d17348785b9b4f67b802e85abcfc806cb1"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/atlases/x.webp",
+      "bytes": 354550,
+      "sha256": "5cdfa0ae73819a70c7b9eeabc6da0f468359653bf4ded44b61e81bbff8b919bd"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/atlases/y.webp",
+      "bytes": 359010,
+      "sha256": "fd8f652d8236c46b2c6333a3b59fc342347338cdfc11bbd1fc2fab900411f4bd"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/atlases/z.webp",
+      "bytes": 356956,
+      "sha256": "f3408af0fab5c2c2054d8def7fd999276ed4eeae0613c42ad0a09847a67a6ade"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/impostors/view-00n.png",
+      "bytes": 9058,
+      "sha256": "48dc06022b77ac21de561830e9d9146909a8026884f25e688d928b8924df3b44"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/impostors/view-00p.png",
+      "bytes": 8958,
+      "sha256": "5ddd8bc03c80174d9e0f2b952c32e9726be2707bec5911acd5e12afe3a2eaa18"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/impostors/view-0n0.png",
+      "bytes": 16142,
+      "sha256": "f11907c37fd77f1b379577e6539918358b3d2483a41fbfe2531e887c4b5f1f88"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/impostors/view-0nn.png",
+      "bytes": 16230,
+      "sha256": "2d48ffd3fe5eccb071394734af1e4ee550056628d6e8cee0eb92f9ffa7b5aa41"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/impostors/view-0np.png",
+      "bytes": 15488,
+      "sha256": "746b0673ffa4d6018bc68247da33fb251991ecfc0ae6e3f88fec44c21f08990e"
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+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/impostors/view-0p0.png",
+      "bytes": 16215,
+      "sha256": "3bb6276f4f8567de6f391392392643917b77b11b7efec70de03f8c3819bfbc3b"
+    },
+    {
+      "location": "prepared",
+      "filename": "smc-allwise-wide/impostors/view-0pn.png",
+      "bytes": 15481,
+      "sha256": "69a9ed2444db6bbbc79ad69b322a019ceb1c0ca35ddb97961c48259c45584149"
+    },
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+}
diff --git a/src/objects/smc/investigations.json b/src/objects/smc-volume/investigations.json
similarity index 97%
rename from src/objects/smc/investigations.json
rename to src/objects/smc-volume/investigations.json
index b2cf2b0034b..52507c1ec1f 100644
--- a/src/objects/smc/investigations.json
+++ b/src/objects/smc-volume/investigations.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-investigation-ledger@1",
-  "objectId": "smc",
+  "objectId": "smc-volume",
   "entries": [
     {
       "id": "dataset-optical",
@@ -8,8 +8,8 @@
       "status": "included",
       "finding": "publisher-curated AstroPix JPEG derivative. Selected for image-layer display. The SMASH image covers the main optical body, not the full Bridge, Wing or tidal debris. Released foreground and background sources remain. This ledger consolidates existing records; no fresh source survey or visual qualification was performed.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/recipe.json"
       ]
     },
     {
@@ -18,8 +18,8 @@
       "status": "included",
       "finding": "The observation is decomposed by local compactness into one high-frequency midplane residual and a diffuse component. Only diffuse optical depth is distributed through 32 normalized parametric slabs; cross-axis textures sample the same separable field. This is not measured per-pixel depth. Adopted thickness: 25 kpc. The cited geometry reference is Ripepi et al. 2017, arXiv:1707.04500; the broad envelope is not a thin disk or per-pixel distance map. Selection does not independently qualify those adopted values.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/recipe.json"
       ]
     },
     {
@@ -27,8 +27,8 @@
       "survey": "scientific-registration",
       "status": "unresolved",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/recipe.json"
       ]
     },
     {
@@ -130,8 +130,8 @@
       "finding": "The previous SMC object distributed one SMASH image through 32 normalized parametric slabs with an authored 25 kpc thickness and no observational depth constraint. Its prepared bank and 96 layer images are removed; its source record, recipe and publisher photograph are retained as documents, and that photograph is now the SMASH dataset preview.",
       "evidence": [
         "https://noirlab.edu/public/images/noirlab2030b/",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/provenance.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/recipe.json"
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/provenance.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/recipe.json"
       ],
       "revisitWhen": "A future delivery needs a separable parametric envelope again, or the retired record is shown to misstate its own inputs."
     },
@@ -169,8 +169,8 @@
       "status": "included",
       "finding": "Resolved. The delivery is regenerated from its own checked-in inputs: 9.3 MB of compact replay inputs (fitted emission field, envelope gain map, neutral alpha bank, the VMC ellipsoid density grid, and per dataset the registered colour raster with an alpha-only coverage mask) plus numbered records of the laboratory inputs behind them. `prepare:nebulae --if-missing` rebuilds the bank and its axis atlases, and `prepared/**` is no longer tracked. Verified with the ignored laboratory caches moved aside: all 1,360 regenerated slice textures are byte-identical to the promotion output, every dataset is value-identical in label, stars, brightness, frame, provenance and leaf geometry, and the committed descriptor pin matches the regenerated bank. This replaces the earlier finding that a clean checkout could verify the bank but not regenerate it, and that the runtime loaded 272 slice images per dataset; it now loads three axis atlases. Re-proven on the merged tree: the restore is byte-identical across all 15 atlases, the bank and the delivery receipt, and re-preparing over an installed delivery is idempotent.",
       "evidence": [
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/compact/inputs.json",
-        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc/source/compact-delivery.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/compact/inputs.json",
+        "https://github.com/layoutit/css.earth/blob/main/src/objects/smc-volume/source/compact-delivery.json",
         "https://github.com/layoutit/css.earth/blob/main/packages/bake/src/nebula/finite-emission-object.ts",
         "https://github.com/layoutit/css.earth/blob/main/packages/bake/src/volume/node/compact-inputs/finite-emission.ts"
       ]
diff --git a/src/objects/smc-volume/object.json b/src/objects/smc-volume/object.json
new file mode 100644
index 00000000000..60bc1d3d927
--- /dev/null
+++ b/src/objects/smc-volume/object.json
@@ -0,0 +1,43 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "smc-volume",
+  "type": "volume-dataset-bank",
+  "properties": {
+    "frame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        558685736318132900000,
+        162842042038617440000,
+        -1.83671292332706e+21
+      ],
+      "localToReferenceXyzw": [
+        0.5930234436925893,
+        0.7905512466577111,
+        0.12224251888534837,
+        0.09169889975068647
+      ],
+      "metersPerUnit": 30856775814913670000,
+      "boundsUnits": {
+        "min": [
+          -7.921340139025261,
+          -9.077825371668188,
+          -10.652996905888628
+        ],
+        "max": [
+          8.600007418943365,
+          6.891913440126711,
+          8.882893247926392
+        ]
+      }
+    },
+    "preparation": {
+      "source": "source/compact-delivery.json"
+    },
+    "host": "smc"
+  },
+  "prepared": {
+    "format": "cssearth-volume-datasets@1",
+    "url": "prepared/datasets.json"
+  }
+}
diff --git a/src/objects/smc/source/bake-inputs/references/01-emission-model.json b/src/objects/smc-volume/source/bake-inputs/references/01-emission-model.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/01-emission-model.json
rename to src/objects/smc-volume/source/bake-inputs/references/01-emission-model.json
diff --git a/src/objects/smc/source/bake-inputs/references/02-emission-recipe.json b/src/objects/smc-volume/source/bake-inputs/references/02-emission-recipe.json
similarity index 64%
rename from src/objects/smc/source/bake-inputs/references/02-emission-recipe.json
rename to src/objects/smc-volume/source/bake-inputs/references/02-emission-recipe.json
index f48bd01fe03..ab6e6babb13 100644
--- a/src/objects/smc/source/bake-inputs/references/02-emission-recipe.json
+++ b/src/objects/smc-volume/source/bake-inputs/references/02-emission-recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-delivered-input-reference@1",
-  "originalPath": "src/objects/smc/source/evidence/smc/constrained/emission-envelope-ellipsoid.json",
+  "originalPath": "src/objects/smc-volume/source/evidence/smc/constrained/emission-envelope-ellipsoid.json",
   "bytes": 1724,
   "role": "Laboratory record behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
 }
diff --git a/src/objects/smc/source/bake-inputs/references/03-lens-recipe.json b/src/objects/smc-volume/source/bake-inputs/references/03-lens-recipe.json
similarity index 65%
rename from src/objects/smc/source/bake-inputs/references/03-lens-recipe.json
rename to src/objects/smc-volume/source/bake-inputs/references/03-lens-recipe.json
index 67592793c09..fd6f0b57687 100644
--- a/src/objects/smc/source/bake-inputs/references/03-lens-recipe.json
+++ b/src/objects/smc-volume/source/bake-inputs/references/03-lens-recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-delivered-input-reference@1",
-  "originalPath": "src/objects/smc/source/evidence/smc/constrained/finite-lenses-ellipsoid.json",
+  "originalPath": "src/objects/smc-volume/source/evidence/smc/constrained/finite-lenses-ellipsoid.json",
   "bytes": 2224,
   "role": "Laboratory record behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
 }
diff --git a/src/objects/smc/source/bake-inputs/references/04-promotion-recipe.json b/src/objects/smc-volume/source/bake-inputs/references/04-promotion-recipe.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/04-promotion-recipe.json
rename to src/objects/smc-volume/source/bake-inputs/references/04-promotion-recipe.json
diff --git a/src/objects/smc/source/bake-inputs/references/05-depth-density.json b/src/objects/smc-volume/source/bake-inputs/references/05-depth-density.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/05-depth-density.json
rename to src/objects/smc-volume/source/bake-inputs/references/05-depth-density.json
diff --git a/src/objects/smc/source/bake-inputs/references/06-catalogue-stars.json b/src/objects/smc-volume/source/bake-inputs/references/06-catalogue-stars.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/06-catalogue-stars.json
rename to src/objects/smc-volume/source/bake-inputs/references/06-catalogue-stars.json
diff --git a/src/objects/smc/source/bake-inputs/references/07-baseline-smc-horalek-wide.json b/src/objects/smc-volume/source/bake-inputs/references/07-baseline-smc-horalek-wide.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/07-baseline-smc-horalek-wide.json
rename to src/objects/smc-volume/source/bake-inputs/references/07-baseline-smc-horalek-wide.json
diff --git a/src/objects/smc/source/bake-inputs/references/08-baseline-smc-vista.json b/src/objects/smc-volume/source/bake-inputs/references/08-baseline-smc-vista.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/08-baseline-smc-vista.json
rename to src/objects/smc-volume/source/bake-inputs/references/08-baseline-smc-vista.json
diff --git a/src/objects/smc/source/bake-inputs/references/09-baseline-smc-smash.json b/src/objects/smc-volume/source/bake-inputs/references/09-baseline-smc-smash.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/09-baseline-smc-smash.json
rename to src/objects/smc-volume/source/bake-inputs/references/09-baseline-smc-smash.json
diff --git a/src/objects/smc/source/bake-inputs/references/10-baseline-smc-dss2.json b/src/objects/smc-volume/source/bake-inputs/references/10-baseline-smc-dss2.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/10-baseline-smc-dss2.json
rename to src/objects/smc-volume/source/bake-inputs/references/10-baseline-smc-dss2.json
diff --git a/src/objects/smc/source/bake-inputs/references/11-baseline-smc-allwise-wide.json b/src/objects/smc-volume/source/bake-inputs/references/11-baseline-smc-allwise-wide.json
similarity index 100%
rename from src/objects/smc/source/bake-inputs/references/11-baseline-smc-allwise-wide.json
rename to src/objects/smc-volume/source/bake-inputs/references/11-baseline-smc-allwise-wide.json
diff --git a/src/objects/smc/source/compact-delivery.json b/src/objects/smc-volume/source/compact-delivery.json
similarity index 62%
rename from src/objects/smc/source/compact-delivery.json
rename to src/objects/smc-volume/source/compact-delivery.json
index 8b2fa50291b..ad44babfd63 100644
--- a/src/objects/smc/source/compact-delivery.json
+++ b/src/objects/smc-volume/source/compact-delivery.json
@@ -1,11 +1,11 @@
 {
   "schema": "cssearth-compact-density-delivery@1",
-  "id": "smc",
+  "id": "smc-volume",
   "delivery": {
-    "directory": "src/objects/smc",
+    "directory": "src/objects/smc-volume",
     "method": "finite-emission",
     "compactInputs": {
-      "path": "src/objects/smc/source/compact/inputs.json"
+      "path": "src/objects/smc-volume/source/compact/inputs.json"
     }
   },
   "researchRecipe": {
diff --git a/src/objects/smc/source/compact/emission-field.json.gz b/src/objects/smc-volume/source/compact/emission-field.json.gz
similarity index 100%
rename from src/objects/smc/source/compact/emission-field.json.gz
rename to src/objects/smc-volume/source/compact/emission-field.json.gz
diff --git a/src/objects/smc/source/compact/envelope.json.gz b/src/objects/smc-volume/source/compact/envelope.json.gz
similarity index 100%
rename from src/objects/smc/source/compact/envelope.json.gz
rename to src/objects/smc-volume/source/compact/envelope.json.gz
diff --git a/src/objects/smc/source/compact/inputs.json b/src/objects/smc-volume/source/compact/inputs.json
similarity index 82%
rename from src/objects/smc/source/compact/inputs.json
rename to src/objects/smc-volume/source/compact/inputs.json
index ad5570140ff..6c6919e45ba 100644
--- a/src/objects/smc/source/compact/inputs.json
+++ b/src/objects/smc-volume/source/compact/inputs.json
@@ -73,26 +73,26 @@
     "quality": 92
   },
   "emissionField": {
-    "path": "src/objects/smc/source/compact/emission-field.json.gz",
+    "path": "src/objects/smc-volume/source/compact/emission-field.json.gz",
     "bytes": 21537
   },
   "envelope": {
-    "path": "src/objects/smc/source/compact/envelope.json.gz",
+    "path": "src/objects/smc-volume/source/compact/envelope.json.gz",
     "bytes": 245420
   },
   "neutralSlices": {
-    "path": "src/objects/smc/source/compact/neutral-slices.json.gz",
+    "path": "src/objects/smc-volume/source/compact/neutral-slices.json.gz",
     "bytes": 43001
   },
-  "neutralTextures": "src/objects/smc/source/compact/neutral",
+  "neutralTextures": "src/objects/smc-volume/source/compact/neutral",
   "priorCloud": {
     "recipe": {
-      "path": "src/objects/smc/source/compact/prior/volume.json",
+      "path": "src/objects/smc-volume/source/compact/prior/volume.json",
       "bytes": 1369
     }
   },
   "stars": {
-    "path": "src/objects/smc/source/compact/stars.json.gz",
+    "path": "src/objects/smc-volume/source/compact/stars.json.gz",
     "bytes": 159252
   },
   "datasets": [
@@ -109,11 +109,11 @@
         ]
       },
       "registered": {
-        "path": "src/objects/smc/source/compact/lenses/smc-horalek-wide/registered.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-horalek-wide/registered.png",
         "bytes": 778199
       },
       "coverage": {
-        "path": "src/objects/smc/source/compact/lenses/smc-horalek-wide/coverage.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-horalek-wide/coverage.png",
         "bytes": 9928
       },
       "densityFilter": {
@@ -125,7 +125,7 @@
         "all-light"
       ],
       "provenance": {
-        "path": "src/objects/smc/source/lenses/smc-horalek-wide/provenance.json"
+        "path": "src/objects/smc-volume/source/lenses/smc-horalek-wide/provenance.json"
       },
       "presentation": {
         "label": "Hor\u00e1lek optical",
@@ -157,11 +157,11 @@
         ]
       },
       "registered": {
-        "path": "src/objects/smc/source/compact/lenses/smc-vista/registered.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-vista/registered.png",
         "bytes": 1639979
       },
       "coverage": {
-        "path": "src/objects/smc/source/compact/lenses/smc-vista/coverage.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-vista/coverage.png",
         "bytes": 7724
       },
       "densityFilter": {
@@ -173,7 +173,7 @@
         "all-light"
       ],
       "provenance": {
-        "path": "src/objects/smc/source/lenses/smc-vista/provenance.json"
+        "path": "src/objects/smc-volume/source/lenses/smc-vista/provenance.json"
       },
       "presentation": {
         "label": "ESO VISTA",
@@ -205,11 +205,11 @@
         ]
       },
       "registered": {
-        "path": "src/objects/smc/source/compact/lenses/smc-smash/registered.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-smash/registered.png",
         "bytes": 1274535
       },
       "coverage": {
-        "path": "src/objects/smc/source/compact/lenses/smc-smash/coverage.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-smash/coverage.png",
         "bytes": 9582
       },
       "densityFilter": {
@@ -221,7 +221,7 @@
         "all-light"
       ],
       "provenance": {
-        "path": "src/objects/smc/source/lenses/smc-smash/provenance.json"
+        "path": "src/objects/smc-volume/source/lenses/smc-smash/provenance.json"
       },
       "presentation": {
         "label": "NOIRLab SMASH",
@@ -253,11 +253,11 @@
         ]
       },
       "registered": {
-        "path": "src/objects/smc/source/compact/lenses/smc-dss2/registered.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-dss2/registered.png",
         "bytes": 1857412
       },
       "coverage": {
-        "path": "src/objects/smc/source/compact/lenses/smc-dss2/coverage.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-dss2/coverage.png",
         "bytes": 7133
       },
       "densityFilter": {
@@ -269,7 +269,7 @@
         "all-light"
       ],
       "provenance": {
-        "path": "src/objects/smc/source/lenses/smc-dss2/provenance.json"
+        "path": "src/objects/smc-volume/source/lenses/smc-dss2/provenance.json"
       },
       "presentation": {
         "label": "DSS2 optical",
@@ -301,11 +301,11 @@
         ]
       },
       "registered": {
-        "path": "src/objects/smc/source/compact/lenses/smc-allwise-wide/registered.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-allwise-wide/registered.png",
         "bytes": 632401
       },
       "coverage": {
-        "path": "src/objects/smc/source/compact/lenses/smc-allwise-wide/coverage.png",
+        "path": "src/objects/smc-volume/source/compact/lenses/smc-allwise-wide/coverage.png",
         "bytes": 7938
       },
       "densityFilter": {
@@ -317,7 +317,7 @@
         "all-light"
       ],
       "provenance": {
-        "path": "src/objects/smc/source/lenses/smc-allwise-wide/provenance.json"
+        "path": "src/objects/smc-volume/source/lenses/smc-allwise-wide/provenance.json"
       },
       "presentation": {
         "label": "NASA AllWISE",
diff --git a/src/objects/smc/source/compact/lenses/smc-allwise-wide/coverage.png b/src/objects/smc-volume/source/compact/lenses/smc-allwise-wide/coverage.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-allwise-wide/coverage.png
rename to src/objects/smc-volume/source/compact/lenses/smc-allwise-wide/coverage.png
diff --git a/src/objects/smc/source/compact/lenses/smc-allwise-wide/registered.png b/src/objects/smc-volume/source/compact/lenses/smc-allwise-wide/registered.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-allwise-wide/registered.png
rename to src/objects/smc-volume/source/compact/lenses/smc-allwise-wide/registered.png
diff --git a/src/objects/smc/source/compact/lenses/smc-dss2/coverage.png b/src/objects/smc-volume/source/compact/lenses/smc-dss2/coverage.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-dss2/coverage.png
rename to src/objects/smc-volume/source/compact/lenses/smc-dss2/coverage.png
diff --git a/src/objects/smc/source/compact/lenses/smc-dss2/registered.png b/src/objects/smc-volume/source/compact/lenses/smc-dss2/registered.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-dss2/registered.png
rename to src/objects/smc-volume/source/compact/lenses/smc-dss2/registered.png
diff --git a/src/objects/smc/source/compact/lenses/smc-horalek-wide/coverage.png b/src/objects/smc-volume/source/compact/lenses/smc-horalek-wide/coverage.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-horalek-wide/coverage.png
rename to src/objects/smc-volume/source/compact/lenses/smc-horalek-wide/coverage.png
diff --git a/src/objects/smc/source/compact/lenses/smc-horalek-wide/registered.png b/src/objects/smc-volume/source/compact/lenses/smc-horalek-wide/registered.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-horalek-wide/registered.png
rename to src/objects/smc-volume/source/compact/lenses/smc-horalek-wide/registered.png
diff --git a/src/objects/smc/source/compact/lenses/smc-smash/coverage.png b/src/objects/smc-volume/source/compact/lenses/smc-smash/coverage.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-smash/coverage.png
rename to src/objects/smc-volume/source/compact/lenses/smc-smash/coverage.png
diff --git a/src/objects/smc/source/compact/lenses/smc-smash/registered.png b/src/objects/smc-volume/source/compact/lenses/smc-smash/registered.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-smash/registered.png
rename to src/objects/smc-volume/source/compact/lenses/smc-smash/registered.png
diff --git a/src/objects/smc/source/compact/lenses/smc-vista/coverage.png b/src/objects/smc-volume/source/compact/lenses/smc-vista/coverage.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-vista/coverage.png
rename to src/objects/smc-volume/source/compact/lenses/smc-vista/coverage.png
diff --git a/src/objects/smc/source/compact/lenses/smc-vista/registered.png b/src/objects/smc-volume/source/compact/lenses/smc-vista/registered.png
similarity index 100%
rename from src/objects/smc/source/compact/lenses/smc-vista/registered.png
rename to src/objects/smc-volume/source/compact/lenses/smc-vista/registered.png
diff --git a/src/objects/smc/source/compact/neutral-slices.json.gz b/src/objects/smc-volume/source/compact/neutral-slices.json.gz
similarity index 100%
rename from src/objects/smc/source/compact/neutral-slices.json.gz
rename to src/objects/smc-volume/source/compact/neutral-slices.json.gz
diff --git a/src/objects/smc/source/compact/neutral/slices/x/00.png b/src/objects/smc-volume/source/compact/neutral/slices/x/00.png
similarity index 100%
rename from src/objects/smc/source/compact/neutral/slices/x/00.png
rename to src/objects/smc-volume/source/compact/neutral/slices/x/00.png
diff --git a/src/objects/smc/source/compact/neutral/slices/x/01.png b/src/objects/smc-volume/source/compact/neutral/slices/x/01.png
similarity index 100%
rename from src/objects/smc/source/compact/neutral/slices/x/01.png
rename to src/objects/smc-volume/source/compact/neutral/slices/x/01.png
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similarity index 100%
rename from src/objects/smc/source/compact/neutral/slices/x/02.png
rename to src/objects/smc-volume/source/compact/neutral/slices/x/02.png
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similarity index 100%
rename from src/objects/smc/source/compact/neutral/slices/x/03.png
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similarity index 100%
rename from src/objects/smc/source/compact/neutral/slices/x/04.png
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similarity index 100%
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rename from src/objects/smc/source/compact/neutral/slices/x/10.png
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index e80e5557091..01aa2c0b2f3 100644
--- a/src/objects/smc/source/lenses.json
+++ b/src/objects/smc-volume/source/lenses.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-volume-dataset-promotion@1",
-  "id": "smc",
+  "id": "smc-volume",
   "defaultDataset": "smc-horalek-wide",
   "framingRadiusUnits": 7,
   "datasets": [
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similarity index 100%
rename from src/objects/smc/source/lenses/smc-allwise-wide/provenance.json
rename to src/objects/smc-volume/source/lenses/smc-allwise-wide/provenance.json
diff --git a/src/objects/smc/source/lenses/smc-allwise-wide/result.json b/src/objects/smc-volume/source/lenses/smc-allwise-wide/result.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-allwise-wide/result.json
rename to src/objects/smc-volume/source/lenses/smc-allwise-wide/result.json
diff --git a/src/objects/smc/source/lenses/smc-allwise-wide/selection.json b/src/objects/smc-volume/source/lenses/smc-allwise-wide/selection.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-allwise-wide/selection.json
rename to src/objects/smc-volume/source/lenses/smc-allwise-wide/selection.json
diff --git a/src/objects/smc/source/lenses/smc-dss2/provenance.json b/src/objects/smc-volume/source/lenses/smc-dss2/provenance.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-dss2/provenance.json
rename to src/objects/smc-volume/source/lenses/smc-dss2/provenance.json
diff --git a/src/objects/smc/source/lenses/smc-dss2/result.json b/src/objects/smc-volume/source/lenses/smc-dss2/result.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-dss2/result.json
rename to src/objects/smc-volume/source/lenses/smc-dss2/result.json
diff --git a/src/objects/smc/source/lenses/smc-dss2/selection.json b/src/objects/smc-volume/source/lenses/smc-dss2/selection.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-dss2/selection.json
rename to src/objects/smc-volume/source/lenses/smc-dss2/selection.json
diff --git a/src/objects/smc/source/lenses/smc-horalek-wide/provenance.json b/src/objects/smc-volume/source/lenses/smc-horalek-wide/provenance.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-horalek-wide/provenance.json
rename to src/objects/smc-volume/source/lenses/smc-horalek-wide/provenance.json
diff --git a/src/objects/smc/source/lenses/smc-horalek-wide/result.json b/src/objects/smc-volume/source/lenses/smc-horalek-wide/result.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-horalek-wide/result.json
rename to src/objects/smc-volume/source/lenses/smc-horalek-wide/result.json
diff --git a/src/objects/smc/source/lenses/smc-horalek-wide/selection.json b/src/objects/smc-volume/source/lenses/smc-horalek-wide/selection.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-horalek-wide/selection.json
rename to src/objects/smc-volume/source/lenses/smc-horalek-wide/selection.json
diff --git a/src/objects/smc/source/lenses/smc-smash/provenance.json b/src/objects/smc-volume/source/lenses/smc-smash/provenance.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-smash/provenance.json
rename to src/objects/smc-volume/source/lenses/smc-smash/provenance.json
diff --git a/src/objects/smc/source/lenses/smc-smash/result.json b/src/objects/smc-volume/source/lenses/smc-smash/result.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-smash/result.json
rename to src/objects/smc-volume/source/lenses/smc-smash/result.json
diff --git a/src/objects/smc/source/lenses/smc-smash/selection.json b/src/objects/smc-volume/source/lenses/smc-smash/selection.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-smash/selection.json
rename to src/objects/smc-volume/source/lenses/smc-smash/selection.json
diff --git a/src/objects/smc/source/lenses/smc-vista/provenance.json b/src/objects/smc-volume/source/lenses/smc-vista/provenance.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-vista/provenance.json
rename to src/objects/smc-volume/source/lenses/smc-vista/provenance.json
diff --git a/src/objects/smc/source/lenses/smc-vista/result.json b/src/objects/smc-volume/source/lenses/smc-vista/result.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-vista/result.json
rename to src/objects/smc-volume/source/lenses/smc-vista/result.json
diff --git a/src/objects/smc/source/lenses/smc-vista/selection.json b/src/objects/smc-volume/source/lenses/smc-vista/selection.json
similarity index 100%
rename from src/objects/smc/source/lenses/smc-vista/selection.json
rename to src/objects/smc-volume/source/lenses/smc-vista/selection.json
diff --git a/src/objects/smc-volume/source/manifest.json b/src/objects/smc-volume/source/manifest.json
new file mode 100644
index 00000000000..efccf6d0980
--- /dev/null
+++ b/src/objects/smc-volume/source/manifest.json
@@ -0,0 +1,3505 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "smc-horalek-wide",
+      "path": ".local/nebula-lab/smc-intake/iotw2615a.jpg",
+      "origin": "https://noirlab.edu/public/images/iotw2615a/",
+      "sourceUrl": "https://noirlab.edu/public/images/iotw2615a/",
+      "title": "Small Magellanic Cloud · NOIRLab iotw2615a",
+      "credit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
+      "displayCredit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-iotw2615a",
+            "role": "material",
+            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/8"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "smc-horalek-wide",
+      "license": "CC-BY-4.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "unresolved",
+            "label": "Petr Horálek",
+            "evidence": "https://noirlab.edu/public/images/iotw2615a/",
+            "reason": "The photograph credits Petr Horálek but does not identify the individual camera or optics."
+          }
+        ]
+      }
+    },
+    {
+      "id": "smc-vista",
+      "path": ".local/nebula-lab/smc-intake/eso1714a.jpg",
+      "origin": "https://www.eso.org/public/images/eso1714a/",
+      "sourceUrl": "https://www.eso.org/public/images/eso1714a/",
+      "title": "Small Magellanic Cloud · ESO eso1714a",
+      "credit": "ESO/VISTA VMC",
+      "displayCredit": "ESO/VISTA VMC",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "eso-eso1714a",
+            "role": "material",
+            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/0"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "smc-vista",
+      "license": "CC-BY-4.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "vista",
+            "evidence": "https://www.eso.org/public/images/eso1714a/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "smc-smash",
+      "path": ".local/nebula-lab/source-originals/noirlab2030b.tif",
+      "origin": "https://noirlab.edu/public/images/noirlab2030b/",
+      "sourceUrl": "https://noirlab.edu/public/images/noirlab2030b/",
+      "title": "Small Magellanic Cloud · NOIRLab noirlab2030b",
+      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University); image processing Travis Rector (University of Alaska Anchorage), Mahdi Zamani and Davide de Martin",
+      "displayCredit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University); image processing Travis Rector (University of Alaska Anchorage), Mahdi Zamani and Davide de Martin",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noirlab2030b",
+            "role": "material",
+            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/1"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "smc-smash",
+      "license": "CC-BY-4.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "blanco-4m",
+            "evidence": "https://noirlab.edu/public/images/noirlab2030b/"
+          }
+        ]
+      }
+    },
+    {
+      "id": "smc-dss2",
+      "path": ".local/nebula-lab/smc-intake/heic0514c.jpg",
+      "origin": "https://esahubble.org/images/heic0514c/",
+      "sourceUrl": "https://esahubble.org/images/heic0514c/",
+      "title": "Small Magellanic Cloud · ESA/Hubble heic0514c",
+      "credit": "ESA/Hubble and Digitized Sky Survey 2; acknowledgement Davide De Martin (ESA/Hubble)",
+      "displayCredit": "ESA/Hubble and Digitized Sky Survey 2; acknowledgement Davide De Martin (ESA/Hubble)",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "esahubble-heic0514c",
+            "role": "material",
+            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/2"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "smc-dss2",
+      "license": "CC-BY-4.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "unresolved",
+            "label": "Digitized Sky Survey 2 photographic plates",
+            "evidence": "https://esahubble.org/images/heic0514c/",
+            "reason": "The publisher names the Digitized Sky Survey 2 as the plate source without identifying the individual Schmidt telescope and plates behind this composite."
+          }
+        ]
+      }
+    },
+    {
+      "id": "smc-allwise-wide",
+      "path": ".local/nebula-lab/smc-intake/allwise-smc-10deg.jpg",
+      "origin": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json",
+      "sourceUrl": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json",
+      "title": "Small Magellanic Cloud · AllWISE colour HiPS, 10° TAN field",
+      "credit": "IPAC/NASA; colour HiPS CDS (CNRS/Unistra)",
+      "displayCredit": "IPAC/NASA; colour HiPS CDS (CNRS/Unistra)",
+      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "cds-allwise-color",
+            "role": "material",
+            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/4"
+          }
+        ]
+      },
+      "dependencies": [],
+      "datasetId": "smc-allwise-wide",
+      "license": "ODbL-1.0",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "wise",
+            "evidence": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json"
+          }
+        ]
+      }
+    },
+    {
+      "id": "density-prior",
+      "path": "src/objects/smc-volume/source/evidence/smc/full-density/source/provenance.json",
+      "origin": "https://doi.org/10.5061/dryad.1vhhmgr82",
+      "sourceUrl": "https://doi.org/10.5061/dryad.1vhhmgr82",
+      "title": "SMC simulated stellar-density prior",
+      "credit": "Stellar simulation: Garver, Nidever, Debattista & Deg (2026), CC0",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "garver-magellanic-simulation",
+            "role": "method",
+            "evidence": "src/objects/smc-volume/source/evidence/smc/full-density/source/provenance.json: /source — archive, snapshot and star-family particle selection pins"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "vmc-red-clump",
+      "path": "src/objects/smc-volume/source/evidence/smc/vmc/recipe.json",
+      "origin": "https://doi.org/10.1093/mnras/staa3857",
+      "sourceUrl": "https://doi.org/10.1093/mnras/staa3857",
+      "title": "SMC red-clump distance tracers",
+      "credit": "VMC red-clump stars: Tatton et al. (2021), CDS and ESO VMC DR5.1 PSF photometry",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "tatton-2021-smc-reddening",
+            "role": "material",
+            "evidence": "src/objects/smc-volume/source/evidence/smc/vmc/recipe.json: /calibration — published reddening and the paper’s standard-candle constants"
+          },
+          {
+            "catalogueId": "eso-vmc-dr5-psf",
+            "role": "material",
+            "evidence": "src/objects/smc-volume/source/evidence/smc/vmc/recipe.json: /acquisition — DR5.1 PSF table, tiles and selection"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "catalogue-stars",
+      "path": "src/objects/smc-volume/source/evidence/smc/stars/source/catalogue.json",
+      "origin": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/416",
+      "sourceUrl": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/416",
+      "title": "SMC published massive stars",
+      "credit": "Bonanos et al. (2010), AJ 140, 416; CDS/VizieR J/AJ/140/416",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "bonanos-2010-smc",
+            "role": "material",
+            "evidence": "src/objects/smc-volume/source/evidence/smc/stars/source/catalogue.json: /files — ReadMe, table1.dat, table3.dat and refs.dat byte pins"
+          }
+        ]
+      },
+      "dependencies": []
+    },
+    {
+      "id": "sky-registration",
+      "path": "src/objects/smc-volume/source/evidence/image-candidates.json",
+      "origin": "https://noirlab.edu/public/images/noirlab2030b/",
+      "sourceUrl": "https://noirlab.edu/public/images/noirlab2030b/",
+      "title": "SMC shared sky registration",
+      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University)",
+      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noirlab2030b",
+            "role": "method",
+            "evidence": "src/objects/smc-volume/source/evidence/image-candidates.json: /targets/0/images/*/wcsSource — SMASH supplies the publisher sky anchor every relative registration is matched to"
+          }
+        ]
+      },
+      "dependencies": []
+    }
+  ],
+  "documents": [
+    {
+      "id": "document-1",
+      "path": "src/objects/smc-volume/source/compact-delivery.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-2",
+      "path": "src/objects/smc-volume/source/lens-manifest.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-3",
+      "path": "src/objects/smc-volume/source/lens-settings-evidence.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-4",
+      "path": "src/objects/smc-volume/source/lenses.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-5",
+      "path": "src/objects/smc-volume/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-6",
+      "path": "src/objects/smc-volume/source/provenance-references.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-7",
+      "path": "src/objects/smc-volume/source/provenance.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noirlab2030b",
+            "role": "reference",
+            "evidence": "src/objects/smc-volume/source/provenance.json#/checkedSource"
+          }
+        ]
+      },
+      "origin": "https://noirlab.edu/public/images/noirlab2030b/",
+      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
+      "acquisition": "Retired image-layer source record for the superseded SMASH parametric-slab delivery. Kept as the published identity, coverage and geometry account of that retired dataset."
+    },
+    {
+      "id": "document-8",
+      "path": "src/objects/smc-volume/source/recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-9",
+      "path": "src/objects/smc-volume/source/source.jpg",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "noirlab-noirlab2030b",
+            "role": "reference",
+            "evidence": "src/objects/smc-volume/source/provenance.json#/checkedSource"
+          }
+        ]
+      },
+      "origin": "https://noirlab.edu/public/images/noirlab2030b/",
+      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
+      "acquisition": "Unchanged publisher-curated AstroPix 3000-pixel JPEG derivative of NOIRLab noirlab2030b, retained from the superseded image-layer delivery and reused as the SMASH dataset preview. The pinned bytes identify this derivative, not the publisher master.",
+      "capture": {
+        "attributions": [
+          {
+            "kind": "facility",
+            "facilityId": "blanco-4m",
+            "evidence": "https://noirlab.edu/public/images/noirlab2030b/ — the publisher page identifies Blanco/DECam SMASH imaging in g, r, i and z."
+          }
+        ]
+      }
+    },
+    {
+      "id": "document-10",
+      "path": "src/objects/smc-volume/source/bake-inputs/references/01-emission-model.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-11",
+      "path": "src/objects/smc-volume/source/bake-inputs/references/02-emission-recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-12",
+      "path": "src/objects/smc-volume/source/bake-inputs/references/03-lens-recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-13",
+      "path": "src/objects/smc-volume/source/bake-inputs/references/04-promotion-recipe.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-14",
+      "path": "src/objects/smc-volume/source/bake-inputs/references/05-depth-density.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
+      "id": "document-15",
+      "path": "src/objects/smc-volume/source/bake-inputs/references/06-catalogue-stars.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Numbered record of a laboratory input behind a delivered replay input; the delivered bytes are pinned in source/compact/inputs.json."
+      }
+    },
+    {
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+    {
+      "id": "document-382",
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/finite-lenses-ellipsoid.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-383",
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/fit-evidence.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-384",
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/fit.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-385",
+      "path": "src/objects/smc-volume/source/evidence/smc/registration/alignment-report.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-386",
+      "path": "src/objects/smc-volume/source/evidence/smc/vmc/density.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Byte-identical historical research evidence retained by the application; original path, revision and byte pins are recorded in source/provenance-references.json."
+      }
+    },
+    {
+      "id": "document-388",
+      "path": "src/objects/smc-volume/source/lenses/smc-allwise-wide/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-389",
+      "path": "src/objects/smc-volume/source/lenses/smc-allwise-wide/result.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-390",
+      "path": "src/objects/smc-volume/source/lenses/smc-allwise-wide/selection.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-392",
+      "path": "src/objects/smc-volume/source/lenses/smc-dss2/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-393",
+      "path": "src/objects/smc-volume/source/lenses/smc-dss2/result.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-394",
+      "path": "src/objects/smc-volume/source/lenses/smc-dss2/selection.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-396",
+      "path": "src/objects/smc-volume/source/lenses/smc-horalek-wide/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-397",
+      "path": "src/objects/smc-volume/source/lenses/smc-horalek-wide/result.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-398",
+      "path": "src/objects/smc-volume/source/lenses/smc-horalek-wide/selection.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-400",
+      "path": "src/objects/smc-volume/source/lenses/smc-smash/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-401",
+      "path": "src/objects/smc-volume/source/lenses/smc-smash/result.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-402",
+      "path": "src/objects/smc-volume/source/lenses/smc-smash/selection.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-404",
+      "path": "src/objects/smc-volume/source/lenses/smc-vista/provenance.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-405",
+      "path": "src/objects/smc-volume/source/lenses/smc-vista/result.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-406",
+      "path": "src/objects/smc-volume/source/lenses/smc-vista/selection.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
+      }
+    },
+    {
+      "id": "document-407",
+      "path": "src/objects/smc-volume/source/stellar-extent.json",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "nidever-2011-smc-periphery",
+            "role": "reference",
+            "evidence": "https://arxiv.org/abs/1104.2594"
+          }
+        ]
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/smc/source/presentation.json b/src/objects/smc-volume/source/presentation.json
similarity index 91%
rename from src/objects/smc/source/presentation.json
rename to src/objects/smc-volume/source/presentation.json
index ebabd0f4c80..2146f8f1372 100644
--- a/src/objects/smc/source/presentation.json
+++ b/src/objects/smc-volume/source/presentation.json
@@ -1,35 +1,35 @@
 {
   "schema": "cssearth-volume-presentation-source@2",
-  "objectId": "smc",
+  "objectId": "smc-volume",
   "name": "Small Magellanic Cloud",
   "defaultDataset": "smc-horalek-wide",
   "bank": {
-    "path": "src/objects/smc/prepared/datasets.json"
+    "path": "src/objects/smc-volume/prepared/datasets.json"
   },
   "recipes": [
     {
       "id": "recipe-1",
-      "path": "src/objects/smc/source/lenses.json"
+      "path": "src/objects/smc-volume/source/lenses.json"
     },
     {
       "id": "recipe-2",
-      "path": "src/objects/smc/source/evidence/smc/constrained/emission-envelope-ellipsoid.json"
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/emission-envelope-ellipsoid.json"
     },
     {
       "id": "recipe-3",
-      "path": "src/objects/smc/source/evidence/smc/constrained/finite-lenses-ellipsoid.json"
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/finite-lenses-ellipsoid.json"
     },
     {
       "id": "recipe-4",
-      "path": "src/objects/smc/source/evidence/smc/constrained/fit.json"
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/fit.json"
     },
     {
       "id": "recipe-5",
-      "path": "src/objects/smc/source/evidence/smc/registration/alignment-report.json"
+      "path": "src/objects/smc-volume/source/evidence/smc/registration/alignment-report.json"
     },
     {
       "id": "recipe-6",
-      "path": "src/objects/smc/source/lens-settings-evidence.json"
+      "path": "src/objects/smc-volume/source/lens-settings-evidence.json"
     }
   ],
   "sharedInputs": [
@@ -126,7 +126,7 @@
       ],
       "input": "smc-smash",
       "preview": {
-        "path": "src/objects/smc/source/source.jpg",
+        "path": "src/objects/smc-volume/source/source.jpg",
         "url": "https://www.astropix.org/archive/noirlab/noirlab2030b/noirlab_noirlab2030b_3000.jpg"
       }
     },
diff --git a/src/objects/smc/source/provenance-references.json b/src/objects/smc-volume/source/provenance-references.json
similarity index 57%
rename from src/objects/smc/source/provenance-references.json
rename to src/objects/smc-volume/source/provenance-references.json
index 6ea205da57c..baa7c414d61 100644
--- a/src/objects/smc/source/provenance-references.json
+++ b/src/objects/smc-volume/source/provenance-references.json
@@ -3,52 +3,52 @@
   "references": [
     {
       "originalPath": "labs/nebula/models/smc/image-candidates.json",
-      "path": "src/objects/smc/source/evidence/image-candidates.json",
+      "path": "src/objects/smc-volume/source/evidence/image-candidates.json",
       "bytes": 29958
     },
     {
       "originalPath": "labs/nebula/models/smc/registration/alignment-report.json",
-      "path": "src/objects/smc/source/evidence/smc/registration/alignment-report.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/registration/alignment-report.json",
       "bytes": 12990
     },
     {
       "originalPath": "labs/nebula/models/smc/stars/source/catalogue.json",
-      "path": "src/objects/smc/source/evidence/smc/stars/source/catalogue.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/stars/source/catalogue.json",
       "bytes": 1015
     },
     {
       "originalPath": "labs/nebula/models/smc/constrained/emission-envelope-ellipsoid.json",
-      "path": "src/objects/smc/source/evidence/smc/constrained/emission-envelope-ellipsoid.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/emission-envelope-ellipsoid.json",
       "bytes": 1724
     },
     {
       "originalPath": "labs/nebula/models/smc/constrained/finite-datasets-ellipsoid.json",
-      "path": "src/objects/smc/source/evidence/smc/constrained/finite-lenses-ellipsoid.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/finite-lenses-ellipsoid.json",
       "bytes": 2224
     },
     {
       "originalPath": "labs/nebula/models/smc/constrained/fit.json",
-      "path": "src/objects/smc/source/evidence/smc/constrained/fit.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/fit.json",
       "bytes": 4922
     },
     {
       "originalPath": "labs/nebula/models/smc/constrained/fit-evidence.json",
-      "path": "src/objects/smc/source/evidence/smc/constrained/fit-evidence.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/constrained/fit-evidence.json",
       "bytes": 32306
     },
     {
       "originalPath": "labs/nebula/models/smc/vmc/recipe.json",
-      "path": "src/objects/smc/source/evidence/smc/vmc/recipe.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/vmc/recipe.json",
       "bytes": 817
     },
     {
       "originalPath": "labs/nebula/models/smc/vmc/density.json",
-      "path": "src/objects/smc/source/evidence/smc/vmc/density.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/vmc/density.json",
       "bytes": 626
     },
     {
       "originalPath": "labs/nebula/models/smc/full-density/source/provenance.json",
-      "path": "src/objects/smc/source/evidence/smc/full-density/source/provenance.json",
+      "path": "src/objects/smc-volume/source/evidence/smc/full-density/source/provenance.json",
       "bytes": 5794
     }
   ]
diff --git a/src/objects/smc/source/provenance.json b/src/objects/smc-volume/source/provenance.json
similarity index 100%
rename from src/objects/smc/source/provenance.json
rename to src/objects/smc-volume/source/provenance.json
diff --git a/src/objects/smc/source/recipe.json b/src/objects/smc-volume/source/recipe.json
similarity index 99%
rename from src/objects/smc/source/recipe.json
rename to src/objects/smc-volume/source/recipe.json
index 67c7a19615a..d92e882882a 100644
--- a/src/objects/smc/source/recipe.json
+++ b/src/objects/smc-volume/source/recipe.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-image-layer-recipe@1",
-  "id": "smc",
+  "id": "smc-volume",
   "source": {
     "path": "source.jpg",
     "dimensions": [
diff --git a/src/objects/smc/source/source.jpg b/src/objects/smc-volume/source/source.jpg
similarity index 100%
rename from src/objects/smc/source/source.jpg
rename to src/objects/smc-volume/source/source.jpg
diff --git a/src/objects/smc/source/stellar-extent.json b/src/objects/smc-volume/source/stellar-extent.json
similarity index 95%
rename from src/objects/smc/source/stellar-extent.json
rename to src/objects/smc-volume/source/stellar-extent.json
index 1cf35e99adb..05babc67cbd 100644
--- a/src/objects/smc/source/stellar-extent.json
+++ b/src/objects/smc-volume/source/stellar-extent.json
@@ -1,6 +1,6 @@
 {
   "schema": "cssearth-stellar-extent@1",
-  "objectId": "smc",
+  "objectId": "smc-volume",
   "radiusPc": 11000,
   "definition": "Projected radius from the SMC centre reached by its metal-poor red giant branch stars in the MAgellanic Periphery Survey.",
   "quote": "Red giant branch stars that extend to large radii (~11 kpc)",
diff --git a/src/objects/smc/README.md b/src/objects/smc/README.md
index 7a77d995911..4adb481cb2d 100644
--- a/src/objects/smc/README.md
+++ b/src/objects/smc/README.md
@@ -1,47 +1,16 @@
-# Small Magellanic Cloud (SMC)
+# Small Magellanic Cloud
 
-Five published images colour one shared three-dimensional emission model; **Horálek optical is the default**. Each dataset carries the same 272 directional slices (80 x, 64 y, 128 z), packed into three WebP axis atlases, and the same 1,803 catalogue stars. Switching datasets changes colour and never geometry. Nothing here measures gas or dust depth.
-
-The shape is a hypothesis with two parts. A broad envelope carries 82.79% of the image light along the depth distribution of a **VMC-constrained ellipsoid**, and 476 fitted detail components sit at conditional modes of the **Garver stellar simulation** along their own sightlines. Catalogue-star depths are realizations inside that model, not distances.
+Small Magellanic Cloud as an object of the world: its place, its card and its list marker. It has no surface. Its datasets show the [Small Magellanic Cloud volume](../smc-volume/README.md) bank, whose README holds the sources, processing, evidence and known problems of the imagery.
 
 ## Sources
 
-| Source / dataset | Role and selected input |
-| --- | --- |
-| [Tatton et al. (2021) red clump](https://doi.org/10.1093/mnras/staa3857) with [ESO VMC DR5.1 PSF photometry](https://www.eso.org/rm/api/v1/public/releaseDescriptions/155) | 489,760 observed tracers constrain the envelope shape; their distances are standard-candle estimates, not geometry. |
-| [Garver, Nidever, Debattista & Deg simulation](https://doi.org/10.5061/dryad.1vhhmgr82) | 225,000 stellar particles supply conditional line-of-sight modes for the detail components. |
-| [Horálek optical, iotw2615a](https://noirlab.edu/public/images/iotw2615a/) | 6069 × 4045-pixel wide-field photograph; also the baseline the emission model was fitted to. |
-| [ESO VISTA, eso1714a](https://www.eso.org/public/images/eso1714a/) | Y/J/Ks near-infrared display; 4000 × 3540 pixels. |
-| [SMASH, noirlab2030b](https://noirlab.edu/public/images/noirlab2030b/) | DECam g/r/i/z optical survey image, 3827 × 3190 pixels; also the publisher sky anchor every relative registration is matched to. |
-| [DSS2, heic0514c](https://esahubble.org/images/heic0514c/) | 13096 × 13616-pixel photographic plate composite; narrower footprint than VISTA or SMASH. |
-| [AllWISE colour HiPS through CDS](https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json) | W4/W2/W1 false colour over a 10° TAN field, 4000² pixels; not native detector sampling. |
-| [Bonanos et al. (2010)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/416) | Observed sky positions and Johnson V for 1,803 selected massive stars. |
-| [Nidever et al. (2011)](https://arxiv.org/abs/1104.2594) | [Stellar extent](source/stellar-extent.json): SMC red giants detected out to about 11 kpc. Inside that radius the SMC's caption hides. It marks where stars are still measured, not a boundary. |
-
-None of the images covers the full Bridge, Wing or tidal debris. Exact input identities, credits, reuse terms and processing pins are in the [source manifest](source/manifest.json). The [investigation ledger](investigations.json) records selected and rejected routes; "included" means used by this delivery, not scientifically validated.
+The card's facts cite their catalogues in [source/content/object.json](source/content/object.json); the [astronomy record](../../../packages/astronomy/data/bodies/smc.json) cites the position, distance and velocity that place it.
 
 ## Processing
 
-1. **Shape.** The simulation particles and a Gaussian ellipsoid are each fitted to VMC red-clump sky positions and distance moduli on training regions. Withheld deviance per observed count, lower better: **ellipsoid 0.45749**, affine simulation 0.60119, simulation with bounded regional weights 0.59503. See [`fit.json`](source/evidence/smc/constrained/fit.json), [`fit-evidence.json`](source/evidence/smc/constrained/fit-evidence.json) and [the shape trial](../../../labs/nebula/models/smc/constrained/README.md).
-2. **Emission.** The registered, star-removed Horálek image is smoothed and divided by the integrated ellipsoid column to give an envelope gain, so image brightness scales the envelope but never moves it in depth. The remaining detail is fitted with 476 components at the strongest simulation mode along each ray. [`emission-envelope-ellipsoid.json`](source/evidence/smc/constrained/emission-envelope-ellipsoid.json) is the recipe; [EMISSION-METHOD.md](../../../labs/nebula/models/smc/constrained/EMISSION-METHOD.md) explains the method.
-3. **Datasets.** [`finite-datasets-ellipsoid.json`](source/evidence/smc/constrained/finite-lenses-ellipsoid.json) bakes each registered image onto that one geometry ([appearance receipt](source/lens-settings-evidence.json)). The [compact inputs](source/compact/inputs.json) carry what a replay needs; each delivered byte's laboratory record is under [`bake-inputs/references/`](source/bake-inputs/references).
-4. **Stars.** Table 3 rows with finite V ≤ 16 whose ray lands on covered footprint; each depth inverts the joint emission and ellipsoid density at a fixed per-star quantile. [Star preparation](../../../labs/nebula/models/smc/stars/README.md) records the selection.
-
-`prepared/` is generated, not committed: `pnpm prepare:nebulae --if-missing` rebuilds the bank and its atlases from the compact inputs alone, and the [object descriptor](object.json) pins the result. Application provenance reads the evidence and recipe copies listed in [provenance references](source/provenance-references.json).
-
-## Evidence
-
-- **Fit.** Total front-projection relative squared error 0.006282; projection RMSE 0.01264 after fitting against 0.04694 before. 8 of the 476 components (0.35% of projected light) found no prior support and keep an authored finite depth.
-- **Registration.** The [alignment report](source/evidence/smc/registration/alignment-report.json) qualifies all five shipped images. AllWISE has its own check against 7,172 bright W1 stars; SMASH's absolute solution remains the publisher's.
-- **Stars against images.** Of the 40 brightest stars projected onto each original, those within 1 px of a photographic peak: Horálek 22 (median 0.67 px), DSS2 35 (0.70 px), VISTA 20 (3.12 px), AllWISE 14 (3.84 px), SMASH 9 (5.26 px). Mirroring east–west gives 0 for every image.
-- **App.** Each dataset decodes one texture at the Earth framing, the world camera is unchanged across all five switches, and all 1,803 stars mount and toggle. The side views show line-of-sight extent rather than a flat sheet.
-- **Replay.** From a removed `prepared/`, all 1,360 regenerated slice textures are byte-identical to the promotion output.
+1. `pnpm prepare:objects --object=smc` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the framing radius is a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+2. `node site/build/prepare/companion-context.mts smc` saves the list marker from the default dataset's picture.
 
 ## Known problems
 
-- The envelope is the ellipsoid's shape hypothesis and the detail components are conditioned on the simulation that the same VMC comparison disfavours. The two carry different depth hypotheses, and neither is measured gas geometry. The model records `materialGatePassed: false`.
-- Photometric red-clump distances include intrinsic luminosity scatter, photometric error, reddening uncertainty and contamination, and have not been deconvolved into geometric depth. Large-scale extensions outside the survey footprint remain model-dependent.
-- Faint concentric ripples remain in the outer halo where alpha is still quantized. Detail resolution is bounded by the 384-pixel fit and 128 slabs.
-- Star removal leaves crowded and saturated stars and can remove compact nebular light. A bright foreground cluster is masked by an authored exclusion rather than classified.
-- The dust and survey-band lab composites are not shipped: the AllWISE W2 background gradient, W3 Galactic cirrus and scattered light, SPIRE covering only about 26% of the field and uncorrected DSS2 plate-to-plate steps are still present in them.
-- The earlier SMASH image-layer delivery is retired; its [source record](source/provenance.json) and [recipe](source/recipe.json) are kept as documents.
+- The framing radius is a presentation value, not a measured extent.
diff --git a/src/objects/smc/inventory.json b/src/objects/smc/inventory.json
index 7294548e041..532495cc9e7 100644
--- a/src/objects/smc/inventory.json
+++ b/src/objects/smc/inventory.json
@@ -3,927 +3,75 @@
   "assets": [
     {
       "location": "public",
-      "filename": "datasets/smc-allwise-wide.webp",
+      "filename": "smc-dataset-smc-allwise-wide.webp",
       "bytes": 3552,
       "sha256": "6057861e4424b9a819becefb2f7aa0306bd0e01f913d23e41ffea5b467190506"
     },
     {
       "location": "public",
-      "filename": "datasets/smc-dss2.webp",
+      "filename": "smc-dataset-smc-dss2.webp",
       "bytes": 27364,
       "sha256": "508f0e2ca7b04ddd63dac86270a7d324ff706aaa49658864c488fbf085cd8f91"
     },
     {
       "location": "public",
-      "filename": "datasets/smc-horalek-wide.webp",
+      "filename": "smc-dataset-smc-horalek-wide.webp",
       "bytes": 19112,
       "sha256": "fda3435e21b465383e5b67015fc266cb8eeb1ac228958c8f5569774748ebc05c"
     },
     {
       "location": "public",
-      "filename": "datasets/smc-smash.webp",
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diff --git a/src/objects/smc/object.json b/src/objects/smc/object.json
index 0afd8f4476c..9910dcae3d8 100644
--- a/src/objects/smc/object.json
+++ b/src/objects/smc/object.json
@@ -1,42 +1,98 @@
 {
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   "id": "smc",
-  "type": "volume-dataset-bank",
+  "type": "layered-body",
   "properties": {
-    "frame": {
+    "preparation": {
+      "schema": "cssearth-object-preparation@1",
+      "label": "Small Magellanic Cloud",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 123427103259654690
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "SMC",
+      "systemName": "Local Group",
+      "classification": "galaxy",
+      "color": "#9a9a9a",
+      "distanceAu": 12879174500,
+      "description": "A galaxy 62,440 parsecs away.",
+      "aliases": [
+        "Nubecula Minor",
+        "NGC 292",
+        "Small Magellanic Cloud",
+        "Small Milky Cloud"
+      ],
+      "order": 5152,
+      "context": {}
+    },
+    "worldFrame": {
       "referenceFrame": "sun-icrf",
       "epochJdTt": 2461286.5,
       "originM": [
-        558685736318132900000,
-        162842042038617440000,
-        -1.83671292332706e+21
+        558685771853032800000,
+        162842052396096230000,
+        -1.8367130401501783e+21
       ],
-      "localToReferenceXyzw": [
-        0.5930234436925893,
-        0.7905512466577111,
-        0.12224251888534837,
-        0.09169889975068647
+      "presentationToReference": [
+        0.693006685704213,
+        0,
+        -0.7209311573023195,
+        -0.6614414048116538,
+        0.3977771559319137,
+        -0.6358212030276307,
+        -0.2867699453744198,
+        -0.9174820620691818,
+        -0.27566222848122346
       ],
-      "metersPerUnit": 30856775814913670000,
-      "boundsUnits": {
-        "min": [
-          -7.921340139025261,
-          -9.077825371668188,
-          -10.652996905888628
-        ],
-        "max": [
-          8.600007418943365,
-          6.891913440126711,
-          8.882893247926392
-        ]
-      }
-    },
-    "preparation": {
-      "source": "source/compact-delivery.json"
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 398151945998886100,
+      "bodyRadiusM": 123427103259654680000
     }
   },
   "prepared": {
-    "format": "cssearth-volume-datasets@1",
-    "url": "prepared/datasets.json"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/smc/source/content/object.json b/src/objects/smc/source/content/object.json
new file mode 100644
index 00000000000..b7783563b83
--- /dev/null
+++ b/src/objects/smc/source/content/object.json
@@ -0,0 +1,178 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "smc",
+  "displayName": "SMC",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Distance from the Sun",
+        "value": "62.44 kpc (\u00b1470 pc statistical, \u00b1810 pc systematic)",
+        "source": {
+          "catalogueId": "doi-10-3847-1538-4357-abbb2b",
+          "url": "https://arxiv.org/abs/2010.08754",
+          "label": "Graczyk et al. (2020), ApJ904,13; DOI 10.3847/1538-4357/abbb2b",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 16.25\u00b0, Dec -72.42\u00b0",
+        "source": {
+          "catalogueId": "publication-stanimirovic2004apj-604-176s",
+          "url": "https://ui.adsabs.harvard.edu/abs/2004ApJ...604..176S",
+          "label": "Stanimirovic2004ApJ...604..176S: A New Look at the Kinematics of Neutral Hydrogen in the Small Magellanic Cloud",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "membership",
+        "label": "Membership",
+        "value": "Local group, Milky way",
+        "source": {
+          "catalogueId": "lvdb-v1-1-1",
+          "url": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv",
+          "label": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "half-light-radius",
+        "label": "Half-light radius",
+        "value": "1.079 kpc",
+        "source": {
+          "catalogueId": "publication-munoz2018apj-860-66m",
+          "url": "https://ui.adsabs.harvard.edu/abs/2018ApJ...860...66M/abstract",
+          "label": "Munoz2018ApJ...860...66M: A MegaCam Survey of Outer Halo Satellites. III. Photometric and Structural Parameters",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "smc-horalek-wide",
+    "controls": [
+      {
+        "id": "smc-horalek-wide",
+        "label": "Hor\u00e1lek optical",
+        "thumbnail": "smc-dataset-smc-horalek-wide.webp",
+        "volume": {
+          "objectId": "smc-volume",
+          "datasetId": "smc-horalek-wide",
+          "surface": "smc-horalek-wide"
+        },
+        "source": {
+          "id": "smc-volume-smc-horalek-wide",
+          "path": "../../smc-volume/source/manifest.json",
+          "url": "https://noirlab.edu/public/images/iotw2615a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "smc-vista",
+        "label": "ESO VISTA",
+        "thumbnail": "smc-dataset-smc-vista.webp",
+        "volume": {
+          "objectId": "smc-volume",
+          "datasetId": "smc-vista",
+          "surface": "smc-vista"
+        },
+        "source": {
+          "id": "smc-volume-smc-vista",
+          "path": "../../smc-volume/source/manifest.json",
+          "url": "https://www.eso.org/public/images/eso1714a/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "smc-smash",
+        "label": "NOIRLab SMASH",
+        "thumbnail": "smc-dataset-smc-smash.webp",
+        "volume": {
+          "objectId": "smc-volume",
+          "datasetId": "smc-smash",
+          "surface": "smc-smash"
+        },
+        "source": {
+          "id": "smc-volume-smc-smash",
+          "path": "../../smc-volume/source/manifest.json",
+          "url": "https://noirlab.edu/public/images/noirlab2030b/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "smc-dss2",
+        "label": "DSS2 optical",
+        "thumbnail": "smc-dataset-smc-dss2.webp",
+        "volume": {
+          "objectId": "smc-volume",
+          "datasetId": "smc-dss2",
+          "surface": "smc-dss2"
+        },
+        "source": {
+          "id": "smc-volume-smc-dss2",
+          "path": "../../smc-volume/source/manifest.json",
+          "url": "https://esahubble.org/images/heic0514c/"
+        },
+        "falseColor": false
+      },
+      {
+        "id": "smc-allwise-wide",
+        "label": "NASA AllWISE",
+        "thumbnail": "smc-dataset-smc-allwise-wide.webp",
+        "volume": {
+          "objectId": "smc-volume",
+          "datasetId": "smc-allwise-wide",
+          "surface": "smc-allwise-wide"
+        },
+        "source": {
+          "id": "smc-volume-smc-allwise-wide",
+          "path": "../../smc-volume/source/manifest.json",
+          "url": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Graczyk et al. (2020), ApJ904,13; DOI 10.3847/1538-4357/abbb2b",
+      "href": "https://arxiv.org/abs/2010.08754"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Stanimirovic2004ApJ...604..176S: A New Look at the Kinematics of Neutral Hydrogen in the Small Magellanic Cloud",
+      "href": "https://ui.adsabs.harvard.edu/abs/2004ApJ...604..176S"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Pace (2025), The Local Volume Database, DOI 10.33232/001c.144859; release v1.1.1.",
+      "href": "https://github.com/apace7/local_volume_database/releases/download/v1.1.1/comb_all.csv"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Munoz2018ApJ...860...66M: A MegaCam Survey of Outer Halo Satellites. III. Photometric and Structural Parameters",
+      "href": "https://ui.adsabs.harvard.edu/abs/2018ApJ...860...66M/abstract"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://arxiv.org/abs/2010.08754",
+      "credit": "Graczyk et al. (2020), ApJ904,13; DOI 10.3847/1538-4357/abbb2b"
+    }
+  }
+}
diff --git a/src/objects/smc/source/manifest.json b/src/objects/smc/source/manifest.json
index b6dd4d356ef..bf59622f7f2 100644
--- a/src/objects/smc/source/manifest.json
+++ b/src/objects/smc/source/manifest.json
@@ -1,3505 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
     {
-      "id": "smc-horalek-wide",
-      "path": ".local/nebula-lab/smc-intake/iotw2615a.jpg",
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
       "origin": "https://noirlab.edu/public/images/iotw2615a/",
-      "sourceUrl": "https://noirlab.edu/public/images/iotw2615a/",
-      "title": "Small Magellanic Cloud · NOIRLab iotw2615a",
-      "credit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
-      "displayCredit": "NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "noirlab-iotw2615a",
-            "role": "material",
-            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/8"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "smc-horalek-wide",
-      "license": "CC-BY-4.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "Petr Horálek",
-            "evidence": "https://noirlab.edu/public/images/iotw2615a/",
-            "reason": "The photograph credits Petr Horálek but does not identify the individual camera or optics."
-          }
-        ]
-      }
-    },
-    {
-      "id": "smc-vista",
-      "path": ".local/nebula-lab/smc-intake/eso1714a.jpg",
-      "origin": "https://www.eso.org/public/images/eso1714a/",
-      "sourceUrl": "https://www.eso.org/public/images/eso1714a/",
-      "title": "Small Magellanic Cloud · ESO eso1714a",
-      "credit": "ESO/VISTA VMC",
-      "displayCredit": "ESO/VISTA VMC",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "eso-eso1714a",
-            "role": "material",
-            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/0"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "smc-vista",
-      "license": "CC-BY-4.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "vista",
-            "evidence": "https://www.eso.org/public/images/eso1714a/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "smc-smash",
-      "path": ".local/nebula-lab/source-originals/noirlab2030b.tif",
-      "origin": "https://noirlab.edu/public/images/noirlab2030b/",
-      "sourceUrl": "https://noirlab.edu/public/images/noirlab2030b/",
-      "title": "Small Magellanic Cloud · NOIRLab noirlab2030b",
-      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University); image processing Travis Rector (University of Alaska Anchorage), Mahdi Zamani and Davide de Martin",
-      "displayCredit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University); image processing Travis Rector (University of Alaska Anchorage), Mahdi Zamani and Davide de Martin",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "noirlab-noirlab2030b",
-            "role": "material",
-            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/1"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "smc-smash",
-      "license": "CC-BY-4.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "blanco-4m",
-            "evidence": "https://noirlab.edu/public/images/noirlab2030b/"
-          }
-        ]
-      }
-    },
-    {
-      "id": "smc-dss2",
-      "path": ".local/nebula-lab/smc-intake/heic0514c.jpg",
-      "origin": "https://esahubble.org/images/heic0514c/",
-      "sourceUrl": "https://esahubble.org/images/heic0514c/",
-      "title": "Small Magellanic Cloud · ESA/Hubble heic0514c",
-      "credit": "ESA/Hubble and Digitized Sky Survey 2; acknowledgement Davide De Martin (ESA/Hubble)",
-      "displayCredit": "ESA/Hubble and Digitized Sky Survey 2; acknowledgement Davide De Martin (ESA/Hubble)",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "esahubble-heic0514c",
-            "role": "material",
-            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/2"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "smc-dss2",
+      "credit": "NOIRLab/NSF/AURA/P. Hor\u00e1lek (Institute of Physics in Opava); the default dataset's picture as the Small Magellanic Cloud bank publishes it, saved by site/build/prepare/companion-context.mts",
       "license": "CC-BY-4.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "unresolved",
-            "label": "Digitized Sky Survey 2 photographic plates",
-            "evidence": "https://esahubble.org/images/heic0514c/",
-            "reason": "The publisher names the Digitized Sky Survey 2 as the plate source without identifying the individual Schmidt telescope and plates behind this composite."
-          }
-        ]
-      }
-    },
-    {
-      "id": "smc-allwise-wide",
-      "path": ".local/nebula-lab/smc-intake/allwise-smc-10deg.jpg",
-      "origin": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json",
-      "sourceUrl": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json",
-      "title": "Small Magellanic Cloud · AllWISE colour HiPS, 10° TAN field",
-      "credit": "IPAC/NASA; colour HiPS CDS (CNRS/Unistra)",
-      "displayCredit": "IPAC/NASA; colour HiPS CDS (CNRS/Unistra)",
-      "acquisition": "Native input identity preserved by the existing Nebula Lab acquisition recipe; the path is repository-relative and may be restored into its ignored cache.",
+      "consumers": [
+        "navigation"
+      ],
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "cds-allwise-color",
-            "role": "material",
-            "evidence": "labs/nebula/models/smc/image-candidates.json#/targets/0/images/4"
-          }
-        ]
-      },
-      "dependencies": [],
-      "datasetId": "smc-allwise-wide",
-      "license": "ODbL-1.0",
-      "capture": {
-        "attributions": [
-          {
-            "kind": "facility",
-            "facilityId": "wise",
-            "evidence": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json"
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/smc-volume/source/manifest.json)."
       }
-    },
-    {
-      "id": "density-prior",
-      "path": "src/objects/smc/source/evidence/smc/full-density/source/provenance.json",
-      "origin": "https://doi.org/10.5061/dryad.1vhhmgr82",
-      "sourceUrl": "https://doi.org/10.5061/dryad.1vhhmgr82",
-      "title": "SMC simulated stellar-density prior",
-      "credit": "Stellar simulation: Garver, Nidever, Debattista & Deg (2026), CC0",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "garver-magellanic-simulation",
-            "role": "method",
-            "evidence": "src/objects/smc/source/evidence/smc/full-density/source/provenance.json: /source — archive, snapshot and star-family particle selection pins"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "vmc-red-clump",
-      "path": "src/objects/smc/source/evidence/smc/vmc/recipe.json",
-      "origin": "https://doi.org/10.1093/mnras/staa3857",
-      "sourceUrl": "https://doi.org/10.1093/mnras/staa3857",
-      "title": "SMC red-clump distance tracers",
-      "credit": "VMC red-clump stars: Tatton et al. (2021), CDS and ESO VMC DR5.1 PSF photometry",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "tatton-2021-smc-reddening",
-            "role": "material",
-            "evidence": "src/objects/smc/source/evidence/smc/vmc/recipe.json: /calibration — published reddening and the paper’s standard-candle constants"
-          },
-          {
-            "catalogueId": "eso-vmc-dr5-psf",
-            "role": "material",
-            "evidence": "src/objects/smc/source/evidence/smc/vmc/recipe.json: /acquisition — DR5.1 PSF table, tiles and selection"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "catalogue-stars",
-      "path": "src/objects/smc/source/evidence/smc/stars/source/catalogue.json",
-      "origin": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/416",
-      "sourceUrl": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/416",
-      "title": "SMC published massive stars",
-      "credit": "Bonanos et al. (2010), AJ 140, 416; CDS/VizieR J/AJ/140/416",
-      "acquisition": "Checked-in model/evidence record. This hash identifies the metadata record, whose fields preserve the separately pinned scientific inputs and published references; it does not identify downloaded paper bytes. The byte-identical application evidence copy retains its original path and revision in source/provenance-references.json.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "bonanos-2010-smc",
-            "role": "material",
-            "evidence": "src/objects/smc/source/evidence/smc/stars/source/catalogue.json: /files — ReadMe, table1.dat, table3.dat and refs.dat byte pins"
-          }
-        ]
-      },
-      "dependencies": []
-    },
-    {
-      "id": "sky-registration",
-      "path": "src/objects/smc/source/evidence/image-candidates.json",
-      "origin": "https://noirlab.edu/public/images/noirlab2030b/",
-      "sourceUrl": "https://noirlab.edu/public/images/noirlab2030b/",
-      "title": "SMC shared sky registration",
-      "credit": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University)",
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-      "path": "src/objects/smc/source/lenses/smc-horalek-wide/result.json",
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-      "path": "src/objects/smc/source/lenses/smc-smash/result.json",
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-    },
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-      "id": "document-404",
-      "path": "src/objects/smc/source/lenses/smc-vista/provenance.json",
-      "sourceBinding": {
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-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-405",
-      "path": "src/objects/smc/source/lenses/smc-vista/result.json",
-      "sourceBinding": {
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-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
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-    },
-    {
-      "id": "document-406",
-      "path": "src/objects/smc/source/lenses/smc-vista/selection.json",
-      "sourceBinding": {
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-        "reason": "Object-owned delivery, presentation or preserved processing record; native published inputs are separately bound above."
-      }
-    },
-    {
-      "id": "document-407",
-      "path": "src/objects/smc/source/stellar-extent.json",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "nidever-2011-smc-periphery",
-            "role": "reference",
-            "evidence": "https://arxiv.org/abs/1104.2594"
-          }
-        ]
-      }
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/smc/source/preparation/navigation.json b/src/objects/smc/source/preparation/navigation.json
new file mode 100644
index 00000000000..b7c7806888d
--- /dev/null
+++ b/src/objects/smc/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "smc",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
diff --git a/src/objects/smc/source/presentation/context.png b/src/objects/smc/source/presentation/context.png
new file mode 100644
index 00000000000..e908228adf8
Binary files /dev/null and b/src/objects/smc/source/presentation/context.png differ
diff --git a/src/objects/smc/source/presentation/solar-system.json b/src/objects/smc/source/presentation/solar-system.json
new file mode 100644
index 00000000000..c00302ad8ee
--- /dev/null
+++ b/src/objects/smc/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "smc",
+  "displayName": "Small Magellanic Cloud",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 1.2342710325965469e+17,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/smc/text.json b/src/objects/smc/text.json
new file mode 100644
index 00000000000..9eecf35c16c
--- /dev/null
+++ b/src/objects/smc/text.json
@@ -0,0 +1,100 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "smc",
+  "card": {
+    "text": "A galaxy 62,440 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "doi-10-3847-1538-4357-abbb2b",
+        "url": "https://arxiv.org/abs/2010.08754",
+        "label": "Graczyk et al. (2020), ApJ904,13; DOI 10.3847/1538-4357/abbb2b",
+        "checked": "2026-10-01",
+        "locator": "distance: 62.44 kpc (±470 pc statistical, ±810 pc systematic)"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "A galaxy 62,440 parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "doi-10-3847-1538-4357-abbb2b",
+        "url": "https://arxiv.org/abs/2010.08754",
+        "label": "Graczyk et al. (2020), ApJ904,13; DOI 10.3847/1538-4357/abbb2b",
+        "checked": "2026-10-01",
+        "locator": "distance: 62.44 kpc (±470 pc statistical, ±810 pc systematic)"
+      }
+    ]
+  },
+  "datasets": {
+    "smc-horalek-wide": {
+      "title": "Petr Horálek’s wide-field SMC",
+      "detail": "6069 × 4045 px",
+      "summary": "Optical photograph colours on an image-fitted emission model; gas and dust depth are not measured.",
+      "sources": [
+        {
+          "catalogueId": "noirlab-iotw2615a",
+          "url": "https://noirlab.edu/public/images/iotw2615a/",
+          "label": "Small Magellanic Cloud · NOIRLab iotw2615a; NOIRLab/NSF/AURA/P. Horálek (Institute of Physics in Opava)",
+          "checked": "2026-10-01",
+          "locator": "Small Magellanic Cloud · NOIRLab iotw2615a"
+        }
+      ]
+    },
+    "smc-vista": {
+      "title": "SMC in VISTA near infrared",
+      "detail": "4000 × 3540 px",
+      "summary": "Near-infrared false colour on an image-fitted emission model; gas and dust depth are not measured.",
+      "sources": [
+        {
+          "catalogueId": "eso-eso1714a",
+          "url": "https://www.eso.org/public/images/eso1714a/",
+          "label": "Small Magellanic Cloud · ESO eso1714a; ESO/VISTA VMC",
+          "checked": "2026-10-01",
+          "locator": "Small Magellanic Cloud · ESO eso1714a"
+        }
+      ]
+    },
+    "smc-smash": {
+      "title": "SMC in the SMASH DECam survey",
+      "detail": "3827 × 3190 px",
+      "summary": "DECam survey colours on an image-fitted emission model; gas and dust depth are not measured.",
+      "sources": [
+        {
+          "catalogueId": "noirlab-noirlab2030b",
+          "url": "https://noirlab.edu/public/images/noirlab2030b/",
+          "label": "Small Magellanic Cloud · NOIRLab noirlab2030b; CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University); image processing Travis Rector (University of Alaska Anchorage), Mahdi Zamani and Davide de Martin",
+          "checked": "2026-10-01",
+          "locator": "Small Magellanic Cloud · NOIRLab noirlab2030b"
+        }
+      ]
+    },
+    "smc-dss2": {
+      "title": "SMC on Digitized Sky Survey 2 plates",
+      "detail": "13096 × 13616 px",
+      "summary": "Photographic plate colours on an image-fitted emission model; gas and dust depth are not measured.",
+      "sources": [
+        {
+          "catalogueId": "esahubble-heic0514c",
+          "url": "https://esahubble.org/images/heic0514c/",
+          "label": "Small Magellanic Cloud · ESA/Hubble heic0514c; ESA/Hubble and Digitized Sky Survey 2; acknowledgement Davide De Martin (ESA/Hubble)",
+          "checked": "2026-10-01",
+          "locator": "Small Magellanic Cloud · ESA/Hubble heic0514c"
+        }
+      ]
+    },
+    "smc-allwise-wide": {
+      "title": "SMC in AllWISE infrared",
+      "detail": "4000 × 4000 px",
+      "summary": "AllWISE infrared false colour on an image-fitted emission model; gas and dust depth are not measured.",
+      "sources": [
+        {
+          "catalogueId": "cds-allwise-color",
+          "url": "https://alasky.cds.unistra.fr/MocServer/query?ID=CDS%2FP%2FallWISE%2Fcolor&get=record&fmt=json",
+          "label": "Small Magellanic Cloud · AllWISE colour HiPS, 10° TAN field; IPAC/NASA; colour HiPS CDS (CNRS/Unistra)",
+          "checked": "2026-10-01",
+          "locator": "Small Magellanic Cloud · AllWISE colour HiPS, 10° TAN field"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/objects/sun/inventory.json b/src/objects/sun/inventory.json
index 9b8f5c79dde..4c95799b7ed 100644
--- a/src/objects/sun/inventory.json
+++ b/src/objects/sun/inventory.json
@@ -211,6 +211,12 @@
       "bytes": 1320,
       "sha256": "6ff26038d012dd2df122b0d606ac7678e77b4501c04d1bf2307e5475a0046b7d"
     },
+    {
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+      "filename": "provenance.json",
+      "bytes": 89168,
+      "sha256": "9a7a704b2c3b11451e430871f24b5f6054d9f9b85fa92ecc2c13e42293acc6be"
+    },
     {
       "location": "prepared",
       "filename": "runtime.json",
@@ -4630,14 +4636,14 @@
     {
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       "filename": "world-context-summary.json",
-      "bytes": 913395,
-      "sha256": "4916cb40a1ecb30bffb0e7755eead531ae6b1090f636f1c73cb9e693cf877ac0"
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-      "bytes": 54126903,
-      "sha256": "2c5080c3cb168089e5dfc2fe577fb9580669839c166a2556c9aa10ebf5df1cc6"
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       "location": "prepared",
@@ -13439,475 +13445,475 @@
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       "bytes": 692,
-      "sha256": "12a87e964f3b8cc41d12960acfd477c69a97485dc12f56ae1981d79b60ecf36d"
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-      "sha256": "5a94487647d4be3ee7df08d457812a93da4dff804e557f36323d511baef5ee93"
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       "bytes": 1000,
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-      "sha256": "5f036f77374dbdb0d537c47308fbc6e44b19b34269c253c3b9ce9de159abf1a9"
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-      "sha256": "b32cec5dd9544a3b9fb153594d5a30370e6efbae80178c708f213a2d435101d5"
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 }
diff --git a/src/objects/virgo-cluster-members/README.md b/src/objects/virgo-cluster-members/README.md
new file mode 100644
index 00000000000..c6910e6d164
--- /dev/null
+++ b/src/objects/virgo-cluster-members/README.md
@@ -0,0 +1,32 @@
+# Virgo Cluster members
+
+The Virgo Cluster's member galaxies that the [Nearby Universe](../nearby-universe/README.md) field does not draw, one dot each, drawn while the cluster is selected. With the field's own 164 Virgo galaxies, about 960 of the cluster's galaxies show when you fly there. The cluster's centre, aperture and card come from the [galaxy cluster catalogue](../galaxy-clusters/README.md), whose Virgo row links here.
+
+## Sources
+
+| Source | Measurement used |
+| --- | --- |
+| [Extended Virgo Cluster Catalog, Kim et al. (2014)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/215/22) | Table 2: J2000 position, membership from the Virgo infall model (MmI), morphology (TT1) and SDSS g and r magnitudes of the 1,028 certain members. |
+| [Cosmicflows-4, Tully et al. (2023)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94) | Virgo's group distance (table 3, DMzp of group 41220: 31.048 mag, 16.2 Mpc), through the Nearby Universe's tracked table. |
+| [Kinney et al. (1996)](https://doi.org/10.1086/177583) | The type templates the Nearby Universe colours its galaxies with. |
+
+## Processing
+
+1. [`members.mts`](../../../packages/bake/authoring/virgo-cluster/members.mts) keeps the 797 certain members more than 10 arcsec from every Cosmicflows-4 galaxy; the other 231 are in the field already. It reads each one's RC3 stage from its EVCC morphology (E and dE −5, S0 and dS0 −2, Sa 1, Sb 3, Sc 5, Sd 7, Sm 9, Irr 10) and its B magnitude from g and r ([Jester et al. 2005](https://doi.org/10.1086/432466): B = g + 0.39 (g − r) + 0.21).
+2. `packages/bake/cli/prepare-catalogue-points.mts` places every member at Virgo's group distance, spread in depth as widely as the members spread across the sky, and colours and tones it as the field does ([recipe](source/dots/points.json)): 797 dots, 8 KB.
+
+## Evidence
+
+![Virgo selected: the Nearby Universe's Virgo galaxies and these members around its name](evidence/2026-09-30/virgo-selected.jpg)
+
+A browser capture of this version, after picking Virgo in the Nearby Universe list: 797 member dots load with the field's 164. The Nearby Universe places the field's own Virgo galaxies the same way; there the cluster comes out 0.64 Mpc deep (rms), where [Mei et al. (2007)](https://arxiv.org/abs/astro-ph/0702510) measured 0.6 ± 0.1 Mpc. The EVCC reaches 3.5 times Virgo's virial radius, so these members spread wider, about as deep as their 725 deg² footprint is wide.
+
+![M87's page: one Cepheid of NGC 4639 ringed and named beside M87](evidence/2026-10-01/featured-cepheid.jpg)
+
+A headless capture of M87's page, 1.2 Mpc out: the 32 Cepheids Hubble resolved in NGC 4639 ([Hoffmann et al. 2016](https://arxiv.org/abs/1607.08658)) sit together as plain dots, and the largest by the period relation, NGC 4639 Cepheid 36973, is featured: ringed, named and opened by a click. The others are reached through search, as an unfeatured star is in every galaxy. They are stars of their own packages, placed at their galaxy's Cepheid distance; a star beyond the Local Group keeps its dot within 8 Mpc of the camera.
+
+## Known problems
+
+- A member's depth is assumed, not measured. Mei et al. found Virgo slightly elongated, 20 to 40° from the line of sight; the dots are not.
+- The EVCC's certain members include Virgo's infall region, not only its core.
+- The B magnitudes are not corrected for Galactic extinction (about 0.1 mag toward Virgo); an unsubdivided spiral or edge-on disk has no type and is white.
diff --git a/src/objects/virgo-cluster/evidence/2026-09-30/virgo-selected.jpg b/src/objects/virgo-cluster-members/evidence/2026-09-30/virgo-selected.jpg
similarity index 100%
rename from src/objects/virgo-cluster/evidence/2026-09-30/virgo-selected.jpg
rename to src/objects/virgo-cluster-members/evidence/2026-09-30/virgo-selected.jpg
diff --git a/src/objects/virgo-cluster/evidence/2026-10-01/featured-cepheid.jpg b/src/objects/virgo-cluster-members/evidence/2026-10-01/featured-cepheid.jpg
similarity index 100%
rename from src/objects/virgo-cluster/evidence/2026-10-01/featured-cepheid.jpg
rename to src/objects/virgo-cluster-members/evidence/2026-10-01/featured-cepheid.jpg
diff --git a/src/objects/virgo-cluster-members/inventory.json b/src/objects/virgo-cluster-members/inventory.json
new file mode 100644
index 00000000000..1f63fe3504e
--- /dev/null
+++ b/src/objects/virgo-cluster-members/inventory.json
@@ -0,0 +1,11 @@
+{
+  "schema": "cssearth-inventory@1",
+  "assets": [
+    {
+      "location": "prepared",
+      "filename": "dots.bin",
+      "bytes": 8321,
+      "sha256": "891934b3e3a82c33fb6c16348415ba169af925492c868e04454a0d4efbe62dae"
+    }
+  ]
+}
diff --git a/src/objects/virgo-cluster-members/object.json b/src/objects/virgo-cluster-members/object.json
new file mode 100644
index 00000000000..9c3b1646596
--- /dev/null
+++ b/src/objects/virgo-cluster-members/object.json
@@ -0,0 +1,15 @@
+{
+  "schema": "cssearth-object@2",
+  "id": "virgo-cluster-members",
+  "type": "catalogue-point-bank",
+  "properties": {
+    "preparation": {
+      "source": "source/dots/points.json"
+    },
+    "host": "virgo-cluster"
+  },
+  "prepared": {
+    "format": "cssearth-catalogue-points-bin@1",
+    "url": "prepared/dots.bin"
+  }
+}
diff --git a/src/objects/virgo-cluster/source/dots/evcc-members.csv.gz b/src/objects/virgo-cluster-members/source/dots/evcc-members.csv.gz
similarity index 100%
rename from src/objects/virgo-cluster/source/dots/evcc-members.csv.gz
rename to src/objects/virgo-cluster-members/source/dots/evcc-members.csv.gz
diff --git a/src/objects/virgo-cluster/source/dots/points.json b/src/objects/virgo-cluster-members/source/dots/points.json
similarity index 100%
rename from src/objects/virgo-cluster/source/dots/points.json
rename to src/objects/virgo-cluster-members/source/dots/points.json
diff --git a/src/objects/virgo-cluster-members/source/manifest.json b/src/objects/virgo-cluster-members/source/manifest.json
new file mode 100644
index 00000000000..8cff072c65a
--- /dev/null
+++ b/src/objects/virgo-cluster-members/source/manifest.json
@@ -0,0 +1,173 @@
+{
+  "schema": "cssearth-volume-source-manifest@2",
+  "pathBase": "repository",
+  "inputs": [
+    {
+      "id": "members",
+      "path": "src/objects/virgo-cluster-members/source/dots/evcc-members.csv.gz",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/215/22/table2.dat",
+      "sourceUrl": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/215/22/table2.dat",
+      "title": "Virgo Cluster members from the Extended Virgo Cluster Catalog that Cosmicflows-4 does not hold",
+      "credit": "Kim et al. (2014), ApJS 215, 22; CDS J/ApJS/215/22",
+      "acquisition": "Written 2026-09-30 by packages/bake/authoring/virgo-cluster/members.mts from the CDS table (the origin), with each member's Cosmicflows-4 group distance from the Nearby Universe's tracked table.",
+      "generator": "packages/bake/authoring/virgo-cluster/members.mts",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kim-2014-evcc",
+            "role": "material",
+            "evidence": "src/objects/virgo-cluster-members/source/dots/points.json#/table"
+          }
+        ]
+      },
+      "dependencies": [
+        "cosmicflows-4-groups"
+      ],
+      "license": "Original catalogue terms apply; cite the authors and CDS/VizieR."
+    },
+    {
+      "id": "cosmicflows-4-groups",
+      "path": "src/objects/nearby-universe/source/galaxies/cf4-hyperleda.csv.gz",
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/944/94/table3.dat.gz",
+      "sourceUrl": "https://doi.org/10.3847/1538-4357/ac94d8",
+      "title": "Cosmicflows-4 group distances, as joined into the Nearby Universe's tracked galaxy table",
+      "credit": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94, distributed by CDS/VizieR",
+      "acquisition": "Read from the Nearby Universe's tracked table, whose G1PGC and GDMzp columns packages/bake/authoring/nearby-universe/cf4-groups.mts joined from CDS tables 2 and 3.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "cosmicflows-4",
+            "role": "method",
+            "evidence": "src/objects/virgo-cluster-members/source/dots/points.json#/table/groupDistance"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "Original catalogue terms apply; cite Tully et al. (2023) and CDS/VizieR."
+    },
+    {
+      "id": "kc96-elliptical",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/elliptical_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/elliptical_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti elliptical template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/virgo-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    },
+    {
+      "id": "kc96-s0",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/s0_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/s0_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti s0 template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/virgo-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    },
+    {
+      "id": "kc96-sa",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/sa_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sa_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti sa template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/virgo-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    },
+    {
+      "id": "kc96-sb",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/sb_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sb_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti sb template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/virgo-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    },
+    {
+      "id": "kc96-sc",
+      "path": "src/objects/nearby-universe/source/galaxies/kc96/sc_template.fits",
+      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sc_template.fits",
+      "sourceUrl": "https://doi.org/10.1086/177583",
+      "title": "Kinney-Calzetti sc template spectrum",
+      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
+      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
+      "sourceBinding": {
+        "kind": "catalogued",
+        "references": [
+          {
+            "catalogueId": "kinney-1996-galaxy-templates",
+            "role": "method",
+            "evidence": "src/objects/virgo-cluster-members/source/dots/points.json#/appearance/colorByClass"
+          }
+        ]
+      },
+      "dependencies": [],
+      "license": "STScI reference data; cite Kinney et al. (1996)."
+    }
+  ],
+  "documents": [
+    {
+      "path": "src/objects/virgo-cluster-members/source/dots/points.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    },
+    {
+      "path": "src/objects/virgo-cluster-members/source/presentation.json",
+      "sourceBinding": {
+        "kind": "local",
+        "reason": "Project-authored processing configuration."
+      }
+    }
+  ],
+  "generatedIntermediates": []
+}
diff --git a/src/objects/virgo-cluster/source/presentation.json b/src/objects/virgo-cluster-members/source/presentation.json
similarity index 100%
rename from src/objects/virgo-cluster/source/presentation.json
rename to src/objects/virgo-cluster-members/source/presentation.json
diff --git a/src/objects/virgo-cluster/README.md b/src/objects/virgo-cluster/README.md
index c6910e6d164..cc22034c7e7 100644
--- a/src/objects/virgo-cluster/README.md
+++ b/src/objects/virgo-cluster/README.md
@@ -1,32 +1,20 @@
-# Virgo Cluster members
+# Virgo Cluster
 
-The Virgo Cluster's member galaxies that the [Nearby Universe](../nearby-universe/README.md) field does not draw, one dot each, drawn while the cluster is selected. With the field's own 164 Virgo galaxies, about 960 of the cluster's galaxies show when you fly there. The cluster's centre, aperture and card come from the [galaxy cluster catalogue](../galaxy-clusters/README.md), whose Virgo row links here.
+The Virgo Cluster as an object of the world: its place, its card and its list marker. It has no surface. Its one dataset shows the [Virgo Cluster members](../virgo-cluster-members/README.md) bank, whose README holds the member catalogue's sources, processing, evidence and known problems.
 
 ## Sources
 
 | Source | Measurement used |
 | --- | --- |
-| [Extended Virgo Cluster Catalog, Kim et al. (2014)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/215/22) | Table 2: J2000 position, membership from the Virgo infall model (MmI), morphology (TT1) and SDSS g and r magnitudes of the 1,028 certain members. |
-| [Cosmicflows-4, Tully et al. (2023)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94) | Virgo's group distance (table 3, DMzp of group 41220: 31.048 mag, 16.2 Mpc), through the Nearby Universe's tracked table. |
-| [Kinney et al. (1996)](https://doi.org/10.1086/177583) | The type templates the Nearby Universe colours its galaxies with. |
+| [MCXC-II, Sadibekova et al. (2024)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/688/A187) | The cluster's J2000 position, redshift and R500 radius (row MCXC J1230.7+1220), through the [galaxy cluster catalogue](../galaxy-clusters/README.md). |
+| [Cosmicflows-4, Tully et al. (2023)](https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94) | The group distance the cluster is placed at (table 3, DMzp of group 41220: 16.2 Mpc). |
 
 ## Processing
 
-1. [`members.mts`](../../../packages/bake/authoring/virgo-cluster/members.mts) keeps the 797 certain members more than 10 arcsec from every Cosmicflows-4 galaxy; the other 231 are in the field already. It reads each one's RC3 stage from its EVCC morphology (E and dE −5, S0 and dS0 −2, Sa 1, Sb 3, Sc 5, Sd 7, Sm 9, Irr 10) and its B magnitude from g and r ([Jester et al. 2005](https://doi.org/10.1086/432466): B = g + 0.39 (g − r) + 0.21).
-2. `packages/bake/cli/prepare-catalogue-points.mts` places every member at Virgo's group distance, spread in depth as widely as the members spread across the sky, and colours and tones it as the field does ([recipe](source/dots/points.json)): 797 dots, 8 KB.
-
-## Evidence
-
-![Virgo selected: the Nearby Universe's Virgo galaxies and these members around its name](evidence/2026-09-30/virgo-selected.jpg)
-
-A browser capture of this version, after picking Virgo in the Nearby Universe list: 797 member dots load with the field's 164. The Nearby Universe places the field's own Virgo galaxies the same way; there the cluster comes out 0.64 Mpc deep (rms), where [Mei et al. (2007)](https://arxiv.org/abs/astro-ph/0702510) measured 0.6 ± 0.1 Mpc. The EVCC reaches 3.5 times Virgo's virial radius, so these members spread wider, about as deep as their 725 deg² footprint is wide.
-
-![M87's page: one Cepheid of NGC 4639 ringed and named beside M87](evidence/2026-10-01/featured-cepheid.jpg)
-
-A headless capture of M87's page, 1.2 Mpc out: the 32 Cepheids Hubble resolved in NGC 4639 ([Hoffmann et al. 2016](https://arxiv.org/abs/1607.08658)) sit together as plain dots, and the largest by the period relation, NGC 4639 Cepheid 36973, is featured: ringed, named and opened by a click. The others are reached through search, as an unfeatured star is in every galaxy. They are stars of their own packages, placed at their galaxy's Cepheid distance; a star beyond the Local Group keeps its dot within 8 Mpc of the camera.
+1. The [astronomy record](../../../packages/astronomy/data/bodies/virgo-cluster.json) places the cluster from those two catalogues.
+2. `pnpm prepare:objects --object=virgo-cluster` prepares its scene through the standard authored lane. The [recipe](object.json) declares no surface, so the scene is the camera, sky and world frame; the page frames the cluster at 1.625 Mpc, a presentation value ([solar-system.json](source/presentation/solar-system.json)).
+3. `node site/build/prepare/companion-context.mts virgo-cluster` draws the list marker from the member dots.
 
 ## Known problems
 
-- A member's depth is assumed, not measured. Mei et al. found Virgo slightly elongated, 20 to 40° from the line of sight; the dots are not.
-- The EVCC's certain members include Virgo's infall region, not only its core.
-- The B magnitudes are not corrected for Galactic extinction (about 0.1 mag toward Virgo); an unsubdivided spiral or edge-on disk has no type and is white.
+- The framing radius is a presentation value, not a measured extent of the cluster.
diff --git a/src/objects/virgo-cluster/inventory.json b/src/objects/virgo-cluster/inventory.json
index 1f63fe3504e..83f4c9db84f 100644
--- a/src/objects/virgo-cluster/inventory.json
+++ b/src/objects/virgo-cluster/inventory.json
@@ -1,11 +1,53 @@
 {
   "schema": "cssearth-inventory@1",
   "assets": [
+    {
+      "location": "public",
+      "filename": "virgo-cluster-dataset-members.webp",
+      "bytes": 886,
+      "sha256": "73673b9e1bd81a59da196bdd45da72976724a8bf96d60d2e03e8a48eecc156a4"
+    },
+    {
+      "location": "prepared",
+      "filename": "content.json",
+      "bytes": 2990,
+      "sha256": "915835958f88b8e5115f5d56519a5f1e977b446c89d72a3f3407289bd799a446"
+    },
+    {
+      "location": "prepared",
+      "filename": "controls.json",
+      "bytes": 480,
+      "sha256": "a8dfbf6fdc4dc3c730bd670cf9c90a94a636c5317cf5df054173ea9c2ef674fd"
+    },
+    {
+      "location": "prepared",
+      "filename": "datasets.json",
+      "bytes": 599,
+      "sha256": "4fa93ac55c1d2d9fbd8de1b5757e8381ee1dc2af9b51fc6a253b5715136ba41d"
+    },
+    {
+      "location": "prepared",
+      "filename": "runtime.json",
+      "bytes": 4640,
+      "sha256": "4a9f4004c47edcb6879215da2e71137bb0172e2e23fdb384dde1fe2d59ba142f"
+    },
+    {
+      "location": "prepared",
+      "filename": "scene.json",
+      "bytes": 3897,
+      "sha256": "1699b34bd8ddf08d649a25c98bcf7df1e6c96e630daa2dadc655677ceedb15ac"
+    },
+    {
+      "location": "prepared",
+      "filename": "text.json",
+      "bytes": 1715,
+      "sha256": "eb45b2202a7cb807d0c34af88b4c39e9022df6ef380a117f511e1dffc09dcb39"
+    },
     {
       "location": "prepared",
-      "filename": "dots.bin",
-      "bytes": 8321,
-      "sha256": "891934b3e3a82c33fb6c16348415ba169af925492c868e04454a0d4efbe62dae"
+      "filename": "world-navigation.json",
+      "bytes": 661,
+      "sha256": "308a71465a95abdab7904c0370979b02e41bf3b9509ee876301c084dbb17d84d"
     }
   ]
 }
diff --git a/src/objects/virgo-cluster/object.json b/src/objects/virgo-cluster/object.json
index 6e6261ca86e..ae5b0621fb0 100644
--- a/src/objects/virgo-cluster/object.json
+++ b/src/objects/virgo-cluster/object.json
@@ -1,14 +1,96 @@
 {
   "schema": "cssearth-object@2",
   "id": "virgo-cluster",
-  "type": "catalogue-point-bank",
+  "type": "layered-body",
   "properties": {
     "preparation": {
-      "source": "source/dots/points.json"
+      "schema": "cssearth-object-preparation@1",
+      "label": "Virgo Cluster",
+      "steps": [
+        "verify-sources",
+        "panel-content",
+        "datasets",
+        "starfield",
+        "scene",
+        "controls",
+        "presentation",
+        "runtime-assets"
+      ]
+    },
+    "recipe": {
+      "schema": "cssearth-authored-object@2",
+      "surfaces": [],
+      "shape": {
+        "kind": "sphere",
+        "radiusKm": 50140062462525670000
+      },
+      "sources": [
+        {
+          "id": "content",
+          "path": "source/content/object.json"
+        },
+        {
+          "id": "solar-system",
+          "path": "source/presentation/solar-system.json"
+        },
+        {
+          "id": "navigation",
+          "path": "source/preparation/navigation.json"
+        }
+      ]
+    },
+    "page": {
+      "stylesheets": [
+        "src/renderers/css/styles/body-surfaces.css"
+      ],
+      "metadata": {
+        "url": "prepared/page.json"
+      }
+    },
+    "catalog": {
+      "name": "Virgo Cluster",
+      "systemName": "Galaxy clusters",
+      "classification": "galaxy-cluster",
+      "color": "#9a9a9a",
+      "distanceAu": 3342143809000,
+      "description": "A cluster of galaxies 16.2 million parsecs away.",
+      "aliases": [
+        "Virgo",
+        "MCXC J1230.7+1220"
+      ],
+      "order": 5153,
+      "context": {}
+    },
+    "worldFrame": {
+      "referenceFrame": "sun-icrf",
+      "epochJdTt": 2461286.5,
+      "originM": [
+        -4.8403134841869164e+23,
+        -6.541779898547468e+22,
+        1.0682585877607984e+23
+      ],
+      "presentationToReference": [
+        -0.9993450622492596,
+        0,
+        -0.03618627582417303,
+        -0.03320025896176645,
+        0.3977771559319137,
+        0.9168811684311056,
+        -0.014394073881107321,
+        -0.9174820620691818,
+        0.39751663665611175
+      ],
+      "orbitUpReference": [
+        0,
+        -0.3977771559319137,
+        0.9174820620691818
+      ],
+      "metersPerUnit": 161742136975889240000,
+      "bodyRadiusM": 5.0140062462525665e+22
     }
   },
   "prepared": {
-    "format": "cssearth-catalogue-points-bin@1",
-    "url": "prepared/dots.bin"
+    "format": "cssearth-css-object@5",
+    "url": "prepared/object.json"
   }
 }
diff --git a/src/objects/virgo-cluster/source/content/object.json b/src/objects/virgo-cluster/source/content/object.json
new file mode 100644
index 00000000000..b61147c2a36
--- /dev/null
+++ b/src/objects/virgo-cluster/source/content/object.json
@@ -0,0 +1,119 @@
+{
+  "schema": "cssearth-object-content@2",
+  "version": 1,
+  "id": "virgo-cluster",
+  "displayName": "Virgo Cluster",
+  "panel": {
+    "facts": [
+      {
+        "id": "distance",
+        "label": "Group distance",
+        "value": "16.2 Mpc",
+        "source": {
+          "catalogueId": "cosmicflows-4",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94",
+          "label": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "position",
+        "label": "Sky position (J2000)",
+        "value": "RA 187.7\u00b0, Dec 12.34\u00b0",
+        "source": {
+          "catalogueId": "mcxc-ii-2024",
+          "url": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz",
+          "label": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "classification",
+        "label": "Classification",
+        "value": "X-ray selected galaxy cluster",
+        "source": {
+          "catalogueId": "mcxc-ii-2024",
+          "url": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz",
+          "label": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "redshift",
+        "label": "Redshift",
+        "value": "0.0036",
+        "source": {
+          "catalogueId": "publication-1995apj-446-1s",
+          "url": "https://ui.adsabs.harvard.edu/abs/1995ApJ...446....1S",
+          "label": "Redshift reference 1995ApJ...446....1S, transcribed from MCXC-II.",
+          "checked": "2026-10-01"
+        }
+      },
+      {
+        "id": "aperture",
+        "label": "R500 radius",
+        "value": "1.079 Mpc",
+        "source": {
+          "catalogueId": "mcxc-ii-2024",
+          "url": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz",
+          "label": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+          "checked": "2026-10-01"
+        }
+      }
+    ],
+    "moreFacts": []
+  },
+  "datasets": {
+    "titleKey": "datasets",
+    "defaultDataset": "members",
+    "controls": [
+      {
+        "id": "members",
+        "label": "Member galaxies",
+        "thumbnail": "virgo-cluster-dataset-members.webp",
+        "volume": {
+          "objectId": "virgo-cluster-members",
+          "datasetId": "members",
+          "surface": "members"
+        },
+        "source": {
+          "id": "virgo-cluster-members",
+          "path": "../../virgo-cluster-members/source/manifest.json",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/215/22"
+        },
+        "falseColor": false
+      }
+    ]
+  },
+  "settings": {
+    "titleKey": "settings",
+    "controls": []
+  },
+  "charts": [],
+  "resources": [
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table",
+      "href": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+      "href": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz"
+    },
+    {
+      "label": "Research",
+      "role": "facts",
+      "description": "Redshift reference 1995ApJ...446....1S, transcribed from MCXC-II.",
+      "href": "https://ui.adsabs.harvard.edu/abs/1995ApJ...446....1S"
+    }
+  ],
+  "provenance": {
+    "editorial": {
+      "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94",
+      "credit": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table"
+    }
+  }
+}
diff --git a/src/objects/virgo-cluster/source/manifest.json b/src/objects/virgo-cluster/source/manifest.json
index 49d55cc7624..3eee000c8c9 100644
--- a/src/objects/virgo-cluster/source/manifest.json
+++ b/src/objects/virgo-cluster/source/manifest.json
@@ -1,173 +1,40 @@
 {
-  "schema": "cssearth-volume-source-manifest@2",
-  "pathBase": "repository",
-  "inputs": [
-    {
-      "id": "members",
-      "path": "src/objects/virgo-cluster/source/dots/evcc-members.csv.gz",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/215/22/table2.dat",
-      "sourceUrl": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/215/22/table2.dat",
-      "title": "Virgo Cluster members from the Extended Virgo Cluster Catalog that Cosmicflows-4 does not hold",
-      "credit": "Kim et al. (2014), ApJS 215, 22; CDS J/ApJS/215/22",
-      "acquisition": "Written 2026-09-30 by packages/bake/authoring/virgo-cluster/members.mts from the CDS table (the origin), with each member's Cosmicflows-4 group distance from the Nearby Universe's tracked table.",
-      "generator": "packages/bake/authoring/virgo-cluster/members.mts",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kim-2014-evcc",
-            "role": "material",
-            "evidence": "src/objects/virgo-cluster/source/dots/points.json#/table"
-          }
-        ]
-      },
-      "dependencies": [
-        "cosmicflows-4-groups"
+  "schema": "cssearth-authoritative-sources@3",
+  "inputs": [],
+  "generatedIntermediates": [
+    {
+      "id": "companion-context-marker",
+      "path": "presentation/context.png",
+      "credit": "The member dots of the Virgo Cluster members bank as they lie on the sky; drawn by site/build/prepare/companion-context.mts",
+      "license": "Project-authored display derivative.",
+      "consumers": [
+        "navigation"
       ],
-      "license": "Original catalogue terms apply; cite the authors and CDS/VizieR."
-    },
-    {
-      "id": "cosmicflows-4-groups",
-      "path": "src/objects/nearby-universe/source/galaxies/cf4-hyperleda.csv.gz",
-      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJ/944/94/table3.dat.gz",
-      "sourceUrl": "https://doi.org/10.3847/1538-4357/ac94d8",
-      "title": "Cosmicflows-4 group distances, as joined into the Nearby Universe's tracked galaxy table",
-      "credit": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94, distributed by CDS/VizieR",
-      "acquisition": "Read from the Nearby Universe's tracked table, whose G1PGC and GDMzp columns packages/bake/authoring/nearby-universe/cf4-groups.mts joined from CDS tables 2 and 3.",
+      "generator": "site/build/prepare/companion-context.mts",
       "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "cosmicflows-4",
-            "role": "method",
-            "evidence": "src/objects/virgo-cluster/source/dots/points.json#/table/groupDistance"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "Original catalogue terms apply; cite Tully et al. (2023) and CDS/VizieR."
-    },
-    {
-      "id": "kc96-elliptical",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/elliptical_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/elliptical_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti elliptical template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/virgo-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
-    },
-    {
-      "id": "kc96-s0",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/s0_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/s0_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti s0 template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/virgo-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
-    },
-    {
-      "id": "kc96-sa",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/sa_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sa_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti sa template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/virgo-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
-    },
-    {
-      "id": "kc96-sb",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/sb_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sb_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti sb template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/virgo-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
-      },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
-    },
-    {
-      "id": "kc96-sc",
-      "path": "src/objects/nearby-universe/source/galaxies/kc96/sc_template.fits",
-      "origin": "https://archive.stsci.edu/hlsps/reference-atlases/cdbs/grid/kc96/sc_template.fits",
-      "sourceUrl": "https://doi.org/10.1086/177583",
-      "title": "Kinney-Calzetti sc template spectrum",
-      "credit": "Kinney et al. (1996), ApJ 467, 38; STScI reference atlases",
-      "acquisition": "Downloaded from the STScI reference atlases on 2026-09-29.",
-      "sourceBinding": {
-        "kind": "catalogued",
-        "references": [
-          {
-            "catalogueId": "kinney-1996-galaxy-templates",
-            "role": "method",
-            "evidence": "src/objects/virgo-cluster/source/dots/points.json#/appearance/colorByClass"
-          }
-        ]
+        "kind": "local",
+        "reason": "A picture of the bank the default dataset shows; its sources are that bank's (src/objects/virgo-cluster-members/source/manifest.json)."
       },
-      "dependencies": [],
-      "license": "STScI reference data; cite Kinney et al. (1996)."
+      "origin": "https://cdsarc.cds.unistra.fr/ftp/J/ApJS/215/22/table2.dat"
     }
   ],
   "documents": [
     {
-      "path": "src/objects/virgo-cluster/source/dots/points.json",
+      "path": "content/object.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored factsheet and dataset list."
       }
     },
     {
-      "path": "src/objects/virgo-cluster/source/presentation.json",
+      "path": "presentation/solar-system.json",
       "sourceBinding": {
         "kind": "local",
-        "reason": "Project-authored processing configuration."
+        "reason": "Project-authored framing: the radius the page frames the cluster at, a presentation value."
       }
+    },
+    {
+      "path": "preparation/navigation.json"
     }
-  ],
-  "generatedIntermediates": []
+  ]
 }
diff --git a/src/objects/virgo-cluster/source/preparation/navigation.json b/src/objects/virgo-cluster/source/preparation/navigation.json
new file mode 100644
index 00000000000..1b98a291caa
--- /dev/null
+++ b/src/objects/virgo-cluster/source/preparation/navigation.json
@@ -0,0 +1,27 @@
+{
+  "schema": "cssearth-navigation-marker@2",
+  "objectId": "virgo-cluster",
+  "owner": "object",
+  "presentation": {
+    "size": 5
+  },
+  "source": {
+    "path": "presentation/context.png"
+  },
+  "operations": [
+    {
+      "type": "resize",
+      "width": "tile",
+      "height": "tile",
+      "fit": "cover",
+      "position": "centre",
+      "kernel": "lanczos3"
+    },
+    {
+      "type": "png"
+    }
+  ],
+  "context": {
+    "pixels": 512
+  }
+}
\ No newline at end of file
diff --git a/src/objects/virgo-cluster/source/presentation/context.png b/src/objects/virgo-cluster/source/presentation/context.png
new file mode 100644
index 00000000000..a22b4be9ebe
Binary files /dev/null and b/src/objects/virgo-cluster/source/presentation/context.png differ
diff --git a/src/objects/virgo-cluster/source/presentation/solar-system.json b/src/objects/virgo-cluster/source/presentation/solar-system.json
new file mode 100644
index 00000000000..b89682e9107
--- /dev/null
+++ b/src/objects/virgo-cluster/source/presentation/solar-system.json
@@ -0,0 +1,9 @@
+{
+  "schema": "cssearth-solar-system-preparation@1",
+  "bodyId": "virgo-cluster",
+  "displayName": "Virgo Cluster",
+  "bodyRadiusUnits": 248,
+  "bodyRadiusKilometers": 5.014006246252567e+19,
+  "defaultZoom": 1.25,
+  "geometryScale": 1.25
+}
diff --git a/src/objects/virgo-cluster/text.json b/src/objects/virgo-cluster/text.json
new file mode 100644
index 00000000000..68f369e282a
--- /dev/null
+++ b/src/objects/virgo-cluster/text.json
@@ -0,0 +1,50 @@
+{
+  "schema": "cssearth-object-text@1",
+  "objectId": "virgo-cluster",
+  "card": {
+    "text": "A cluster of galaxies 16.2 million parsecs away.",
+    "sources": [
+      {
+        "catalogueId": "cosmicflows-4",
+        "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94",
+        "label": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, tables 2 (group membership, 1PGC) and 3 (group distance modulus, DMzp), as joined into the Nearby Universe's tracked table",
+        "checked": "2026-10-01",
+        "locator": "distance: 16.2 Mpc"
+      }
+    ]
+  },
+  "introduction": {
+    "text": "An X-ray selected cluster of galaxies at redshift 0.0036, with an R500 radius of 1.079 million parsecs.",
+    "sources": [
+      {
+        "catalogueId": "mcxc-ii-2024",
+        "url": "https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/mcxcii.dat.gz",
+        "label": "Sadibekova et al. (2024), MCXC-II, A&A 688 A187; CDS J/A+A/688/A187, byte columns defined by https://cdsarc.cds.unistra.fr/ftp/J/A+A/688/A187/ReadMe",
+        "checked": "2026-10-01",
+        "locator": "MCXC J1230.7+1220: z 0.0036, R500 1.079 Mpc"
+      }
+    ]
+  },
+  "datasets": {
+    "members": {
+      "title": "Cosmicflows-4 group members",
+      "summary": "One dot per member galaxy the Nearby Universe field does not draw. A member's depth is assumed, not measured.",
+      "sources": [
+        {
+          "catalogueId": "kim-2014-evcc",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/215/22",
+          "label": "Kim et al. (2014), Extended Virgo Cluster Catalog, ApJS 215, 22; CDS J/ApJS/215/22, table 2",
+          "checked": "2026-10-01",
+          "locator": "table 2, certain members (MmI = M)"
+        },
+        {
+          "catalogueId": "cosmicflows-4",
+          "url": "https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/944/94",
+          "label": "Tully et al. (2023), Cosmicflows-4, ApJ 944, 94; CDS J/ApJ/944/94, table 3 (group distance modulus, DMzp)",
+          "checked": "2026-10-01",
+          "locator": "group 41220: DMzp 31.048 mag"
+        }
+      ]
+    }
+  }
+}
diff --git a/src/platform/solar-geometry.test.mts b/src/platform/solar-geometry.test.mts
index c14ae6c5c99..616ba32b775 100644
--- a/src/platform/solar-geometry.test.mts
+++ b/src/platform/solar-geometry.test.mts
@@ -14,7 +14,6 @@ import { parseSolidReplayScene } from '@cssearth/bake/objects/layers/terrestrial
 import { requireObjectRuntimeDefinition } from '@cssearth/bake/contract';
 import { readPreparedObjects } from '@cssearth/objects/node';
 
-const SCENE_OBJECTS = readPreparedObjects(resolve(import.meta.dirname, '../..')).sceneObjects;
 
 type Vector = readonly number[];
 type EpochStateSource = { centerBodyId: string; positionKm: Vector; parentHeliocentricState: { positionKm: Vector; velocityKmPerDay: Vector } };
@@ -86,8 +85,8 @@ test('all retained body centers are composed with their named parent at the fixe
 });
 
 test('regeneration retains every current registry orbit, including moons and comets', async () => {
-  const registry = SCENE_OBJECTS.filter(body =>
-    ['planet', 'dwarf-planet', 'satellite', 'asteroid', 'trans-neptunian', 'interstellar', 'comet', 'exoplanet', 'star', 'black-hole'].includes(body.classification) && body.id !== 'sun').map(body => body.id);
+  // Every body of the world but the Sun: the scenes, and the galaxies, clusters and nebulae the host draws.
+  const registry = readPreparedObjects(resolve(import.meta.dirname, '../..')).worldObjects.filter(body => body.id !== 'sun').map(body => body.id);
   // Then every star or planet on a hosted orbit around a packaged host, drawn from its astronomy record alone.
   const { BODIES, HOSTED_PLANET_IDS } = await import('@cssearth/astronomy');
   const records = BODIES as Readonly<Record<string, { readonly parent: string | null }>>;
diff --git a/src/sources/benedict-2009.json b/src/sources/benedict-2009.json
index fdc0d60514b..98d36fb92da 100644
--- a/src/sources/benedict-2009.json
+++ b/src/sources/benedict-2009.json
@@ -13,7 +13,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/helix/README.md",
+      "path": "src/objects/helix-volume/README.md",
       "locator": "/"
     }
   ],
@@ -24,7 +24,7 @@
       "kind": "credit",
       "text": "Benedict et al. (2009) · planetary nebula distances",
       "scope": "Published source",
-      "evidence": "src/objects/helix/README.md#/"
+      "evidence": "src/objects/helix-volume/README.md#/"
     }
   ]
 }
diff --git a/src/sources/cds-hips-spitzer-irac.json b/src/sources/cds-hips-spitzer-irac.json
index 19ea361cadd..7bec82806cb 100644
--- a/src/sources/cds-hips-spitzer-irac.json
+++ b/src/sources/cds-hips-spitzer-irac.json
@@ -36,7 +36,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/m8/source/manifest.json",
+      "path": "src/objects/m8-volume/source/manifest.json",
       "locator": "/inputs/2"
     }
   ],
diff --git a/src/sources/corradi-2011.json b/src/sources/corradi-2011.json
index 3d7d9845d29..49b73173d05 100644
--- a/src/sources/corradi-2011.json
+++ b/src/sources/corradi-2011.json
@@ -13,7 +13,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/m2-9/source/image-frame.json",
+      "path": "src/objects/m2-9-volume/source/image-frame.json",
       "locator": "/references"
     }
   ],
@@ -24,7 +24,7 @@
       "kind": "credit",
       "text": "The evolution of M 2-9 from 2000 to 2010",
       "scope": "Published source",
-      "evidence": "src/objects/m2-9/source/image-frame.json#/references"
+      "evidence": "src/objects/m2-9-volume/source/image-frame.json#/references"
     }
   ]
 }
diff --git a/src/sources/esa-heic1112f.json b/src/sources/esa-heic1112f.json
index 5ebd06bcfd0..b42660f3f3a 100644
--- a/src/sources/esa-heic1112f.json
+++ b/src/sources/esa-heic1112f.json
@@ -18,7 +18,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/m31/source/provenance.json",
+      "path": "src/objects/m31-layers/source/provenance.json",
       "locator": "/"
     }
   ],
@@ -29,7 +29,7 @@
       "kind": "credit",
       "text": "ESA/Hubble & Digitized Sky Survey 2. Acknowledgment: Davide De Martin (ESA/Hubble)",
       "scope": "Published source",
-      "evidence": "src/objects/m31/source/provenance.json"
+      "evidence": "src/objects/m31-layers/source/provenance.json"
     }
   ]
 }
diff --git a/src/sources/eso-eso1424a.json b/src/sources/eso-eso1424a.json
index f83f7b0e954..c98f7ba3124 100644
--- a/src/sources/eso-eso1424a.json
+++ b/src/sources/eso-eso1424a.json
@@ -18,7 +18,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/m33/source/provenance.json",
+      "path": "src/objects/m33-layers/source/provenance.json",
       "locator": "/"
     }
   ],
@@ -29,7 +29,7 @@
       "kind": "credit",
       "text": "ESO",
       "scope": "Published source",
-      "evidence": "src/objects/m33/source/provenance.json"
+      "evidence": "src/objects/m33-layers/source/provenance.json"
     }
   ]
 }
diff --git a/src/sources/gaia-2023-dr3.json b/src/sources/gaia-2023-dr3.json
index 66911392732..680b2540ed7 100644
--- a/src/sources/gaia-2023-dr3.json
+++ b/src/sources/gaia-2023-dr3.json
@@ -29,32 +29,32 @@
     {
       "url": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync",
       "checkedOn": "2026-09-29",
-      "locator": "I/355/gaiadr3 around M33 (src/objects/m33/source/lggs-stars/gaia-dr3-foreground.csv): Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag. Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 23.4621, 30.6599, 0.75)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
+      "locator": "I/355/gaiadr3 around M33 (src/objects/m33-layers/source/lggs-stars/gaia-dr3-foreground.csv): Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag. Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 23.4621, 30.6599, 0.75)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
     },
     {
       "url": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync",
       "checkedOn": "2026-09-29",
-      "locator": "I/355/gaiadr3, the same columns and foreground criterion around M31 (148,335 rows, src/objects/m31/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 10.6839, 41.2657, 2.3)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
+      "locator": "I/355/gaiadr3, the same columns and foreground criterion around M31 (148,335 rows, src/objects/m31-layers/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 10.6839, 41.2657, 2.3)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
     },
     {
       "url": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync",
       "checkedOn": "2026-09-29",
-      "locator": "I/355/gaiadr3, the same columns and foreground criterion around M81 (3,207 rows, src/objects/m81/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 148.7094, 69.2285, 0.58)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
+      "locator": "I/355/gaiadr3, the same columns and foreground criterion around M81 (3,207 rows, src/objects/m81-layers/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 148.7094, 69.2285, 0.58)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
     },
     {
       "url": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync",
       "checkedOn": "2026-09-29",
-      "locator": "I/355/gaiadr3, the same columns and foreground criterion around NGC 253 (910 rows, src/objects/ngc-253/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 11.8902, -25.285, 0.38)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
+      "locator": "I/355/gaiadr3, the same columns and foreground criterion around NGC 253 (910 rows, src/objects/ngc-253-layers/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 11.8902, -25.285, 0.38)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
     },
     {
       "url": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync",
       "checkedOn": "2026-09-29",
-      "locator": "I/355/gaiadr3, the same columns and foreground criterion around M83 (1,297 rows, src/objects/m83/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 204.2504167, -29.8678, 0.2)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
+      "locator": "I/355/gaiadr3, the same columns and foreground criterion around M83 (1,297 rows, src/objects/m83-layers/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 204.2504167, -29.8678, 0.2)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
     },
     {
       "url": "https://tapvizier.cds.unistra.fr/TAPVizieR/tap/sync",
       "checkedOn": "2026-09-29",
-      "locator": "I/355/gaiadr3, the same columns and foreground criterion around NGC 300 (1,027 rows, src/objects/ngc-300/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 13.7229167, -37.6844444, 0.38)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
+      "locator": "I/355/gaiadr3, the same columns and foreground criterion around NGC 300 (1,027 rows, src/objects/ngc-300-layers/source/gaia-dr3-foreground.csv). Query: SELECT Source, RA_ICRS, DE_ICRS, Plx, e_Plx, pmRA, e_pmRA, pmDE, e_pmDE, Gmag FROM \"I/355/gaiadr3\" WHERE 1=CONTAINS(POINT('ICRS', RA_ICRS, DE_ICRS), CIRCLE('ICRS', 13.7229167, -37.6844444, 0.38)) AND ((Plx > 0.02 AND e_Plx < 0.2 * Plx) OR (ABS(pmRA) > 0.2 + 2 * e_pmRA AND e_pmRA < 0.2 * ABS(pmRA)) OR (ABS(pmDE) > 0.2 + 2 * e_pmDE AND e_pmDE < 0.2 * ABS(pmDE)))"
     }
   ],
   "creators": [
diff --git a/src/sources/hubble-opo9738a.json b/src/sources/hubble-opo9738a.json
index ef419905ea0..af24b57f4a9 100644
--- a/src/sources/hubble-opo9738a.json
+++ b/src/sources/hubble-opo9738a.json
@@ -23,7 +23,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/m2-9/source/image-frame.json",
+      "path": "src/objects/m2-9-volume/source/image-frame.json",
       "locator": "/publisherImage"
     }
   ],
@@ -34,7 +34,7 @@
       "kind": "credit",
       "text": "Bruce Balick (University of Washington), Vincent Icke (Leiden University, The Netherlands), Garrelt Mellema (Stockholm University), and NASA/ESA",
       "scope": "Published source",
-      "evidence": "src/objects/m2-9/source/image-frame.json#/publisherImage"
+      "evidence": "src/objects/m2-9-volume/source/image-frame.json#/publisherImage"
     }
   ]
 }
diff --git a/src/sources/menten-2007.json b/src/sources/menten-2007.json
index 3dfe4c324a5..ce3a0ba621b 100644
--- a/src/sources/menten-2007.json
+++ b/src/sources/menten-2007.json
@@ -13,7 +13,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/m42/README.md",
+      "path": "src/objects/m42-volume/README.md",
       "locator": "/"
     }
   ],
@@ -24,7 +24,7 @@
       "kind": "credit",
       "text": "Menten et al. (2007) · Orion distance",
       "scope": "Published source",
-      "evidence": "src/objects/m42/README.md#/"
+      "evidence": "src/objects/m42-volume/README.md#/"
     }
   ]
 }
diff --git a/src/sources/noirlab-noirlab2030b.json b/src/sources/noirlab-noirlab2030b.json
index 41bae823d57..7b00696960f 100644
--- a/src/sources/noirlab-noirlab2030b.json
+++ b/src/sources/noirlab-noirlab2030b.json
@@ -18,7 +18,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/smc/source/provenance.json",
+      "path": "src/objects/smc-volume/source/provenance.json",
       "locator": "/"
     }
   ],
@@ -29,7 +29,7 @@
       "kind": "credit",
       "text": "CTIO/NOIRLab/NSF/AURA/SMASH/D. Nidever (Montana State University) Acknowledgment: Image processing: Travis Rector (University of Alaska Anchorage), Mahdi Zamani & Davide de Martin",
       "scope": "Published source",
-      "evidence": "src/objects/smc/source/provenance.json"
+      "evidence": "src/objects/smc-volume/source/provenance.json"
     }
   ]
 }
diff --git a/src/sources/sanchez-contreras-2024.json b/src/sources/sanchez-contreras-2024.json
index c12a5331dcd..91bbe2f1f80 100644
--- a/src/sources/sanchez-contreras-2024.json
+++ b/src/sources/sanchez-contreras-2024.json
@@ -13,7 +13,7 @@
   ],
   "evidence": [
     {
-      "path": "src/objects/m2-9/source/image-frame.json",
+      "path": "src/objects/m2-9-volume/source/image-frame.json",
       "locator": "/references"
     }
   ],
@@ -24,7 +24,7 @@
       "kind": "credit",
       "text": "Uncovering the structure and kinematics of the ionized core of M 2-9 with ALMA",
       "scope": "Published source",
-      "evidence": "src/objects/m2-9/source/image-frame.json#/references"
+      "evidence": "src/objects/m2-9-volume/source/image-frame.json#/references"
     }
   ]
 }