{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.galaxy","code":"thing-q318","url":"https://ver.cy/models/thing/q318/","name":"galaxy","alternateNames":["radio galaxy","field galaxy","dark galaxy","luminous infrared galaxy","possible galaxy","binary galaxy","X-shaped radio galaxy","Lyman-alpha emitter","star-forming galaxy","intergalactic","brightest cluster galaxy","low-surface-brightness galaxy"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.SPC"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A gravitationally bound system of stars, stellar remnants, gas, dust and dark matter, ranging from ultra-faint dwarf galaxies with far fewer than a million stars to giants of trillions.","purpose":"Let an agent describe galaxies by type, distance, size and designation, and handle catalogue cross-identification.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Gravitationally bound with dark matter","Much larger than star clusters","Classified by the Hubble sequence and activity","Our own galaxy is the Milky Way"],"structure":{"bundles":[{"id":"identity","name":"Identity","description":"Which galaxy.","layers":[{"id":"designations","name":"Designations","description":"Catalogue ids.","findings":[{"id":"designations-finding","name":"Designations","description":"Designations and names.","questions":[{"text":"Which designations identify this galaxy?","kind":"provenance"},{"text":"Is it confirmed or a candidate?","kind":"boundary"}]}]},{"id":"type","name":"Type","description":"Morphology.","findings":[{"id":"type-finding","name":"Morphology","description":"Morphological type.","questions":[{"text":"What morphological type is it?","kind":"definition"},{"text":"Is it active?","kind":"definition"}]}]}]},{"id":"distance-and-size","name":"Distance and size","description":"How far and how big.","layers":[{"id":"distance","name":"Distance","description":"Method and value.","findings":[{"id":"distance-finding","name":"Distance","description":"Distance and method.","questions":[{"text":"How far away is it, by which method?","kind":"measurement"},{"text":"Which cosmology was assumed?","kind":"provenance"}]}]},{"id":"size","name":"Size and mass","description":"Diameter, stars, mass.","findings":[{"id":"size-finding","name":"Size","description":"Size and mass.","questions":[{"text":"What are its size and mass?","kind":"measurement"},{"text":"How much is dark matter?","kind":"measurement"}]}]}]},{"id":"contents","name":"Contents","description":"What it contains.","layers":[{"id":"stars","name":"Stars and gas","description":"Populations.","findings":[{"id":"stars-finding","name":"Populations","description":"Stellar populations and gas.","questions":[{"text":"What stellar populations and gas does it contain?","kind":"measurement"},{"text":"Is it forming stars?","kind":"measurement"}]}]},{"id":"nucleus","name":"Nucleus","description":"Central black hole.","findings":[{"id":"nucleus-finding","name":"Nucleus","description":"The central black hole.","questions":[{"text":"Does it have a supermassive black hole, of what mass?","kind":"measurement"},{"text":"Is the nucleus active?","kind":"definition"}]}]}]},{"id":"environment","name":"Environment","description":"Neighbours and interactions.","layers":[{"id":"group","name":"Group","description":"Cluster or group.","findings":[{"id":"group-finding","name":"Membership","description":"Group membership.","questions":[{"text":"Which group or cluster is it part of?","kind":"definition"},{"text":"Is it interacting with neighbours?","kind":"definition"}]}]},{"id":"observation","name":"Observation","description":"Data sources.","findings":[{"id":"observation-finding","name":"Data","description":"Surveys and archives.","questions":[{"text":"Which surveys have observed it?","kind":"provenance"},{"text":"How can it be observed by amateurs?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Report galaxy designations, positions and properties from astronomical catalogues.","State the cosmological model used when converting redshift to distance."],"mustNot":["Merge different galaxies with similar designations into one record.","Give redshift distances without stating the cosmology.","Present speculative findings as established."],"requiresHuman":["Correcting catalogue records that others rely on."]},"ethics":{"considerations":["Public understanding of the universe depends on honest reporting of uncertainty."],"affectedParties":["The public","Astronomers"]},"owners":{"steward":"Nobody owns a galaxy; the astronomical community catalogues them.","roles":[],"masterSystems":["Extragalactic catalogues of the astronomical community"]},"relations":[{"target":"Q249389","type":"parent","note":"registry parent class"},{"target":"astronomical object","type":"related","note":"large-scale system"},{"target":"star and black hole","type":"contains","note":"components"},{"target":"galaxy cluster","type":"related","note":"larger structures"},{"target":"supermassive black hole","type":"related","note":"at the centre of most large galaxies"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.galaxy","Wikidata: Q318 (https://www.wikidata.org/wiki/Q318)","Messier and NGC numbers: M or NGC plus number classic catalogues","PGC number: numeric Principal Galaxies Catalogue"]},"properties":{"applicability":"required","items":["stars: 10^6 to 10^13 stars","diameter: 1000-500000+ light years","distance to Andromeda: 2.5 million light years"]},"recognition":{"applicability":"required","items":["Extended, not point-like, sources","Morphology: spiral, elliptical, lenticular, irregular","Designations such as M31, NGC 224, PGC numbers","A fuzzy patch in a telescope; in images, spiral arms, ellipsoids or irregular shapes; the Milky Way is seen from inside as a band of light."]},"capabilities":{"applicability":"required","items":["observe it, across the spectrum","classify it, by morphology and activity","measure its distance and redshift","catalogue it, with designations"]},"hazards":{"applicability":"required","items":["Merging different galaxies with similar designations","Using redshift distances without stating cosmology"]},"interfaces":{"applicability":"required","items":["IAU nomenclature"]},"context":{"applicability":"required","items":["Galaxies are the building blocks of the large-scale universe; studying them explains cosmic history.","spiral, barred spiral, elliptical, lenticular, irregular","dwarf galaxies","active galaxies: radio galaxies, quasars","luminous infrared galaxies","interacting and binary galaxies"]}},"sources":[{"title":"Wikidata item Q318: galaxy","url":"https://www.wikidata.org/wiki/Q318","note":"identity and sense of the item"},{"title":"Wikipedia: Galaxy","url":"https://en.wikipedia.org/wiki/Galaxy","note":"general description of the item"}],"openQuestions":["Should named galaxies be instances with cross-identifiers?","How should distance methods be recorded?","How should uncertain galaxy candidates be marked?"],"resources":{"spec":"/models/things/publications/thing-q318/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q318/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T05:00:01Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:30+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}