{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.nebula","code":"thing-q42372","url":"https://ver.cy/models/thing/q42372/","name":"nebula","alternateNames":["molecular cloud","giant molecular cloud","infrared dark cloud","emission nebula","reflection nebula","dark nebula","Minimun Mass Solar Nebula","stellar-wind bubble","bipolar nebula","Heart and Soul","diffuse nebula","Propeller Nebula"],"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":"An interstellar cloud of gas and dust, visible when it emits, reflects or blocks light, including emission, reflection, dark and planetary nebulae and star-forming molecular clouds.","purpose":"Let an agent handle nebulae by type, designation, distance and physical nature, with catalogue cross-identification.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Interstellar cloud within a galaxy","Classified by how it interacts with light","Star-forming or stellar-remnant","Not a galaxy"],"structure":{"bundles":[{"id":"identity","name":"Identity","description":"Which nebula.","layers":[{"id":"designation","name":"Designation","description":"Catalogue ids.","findings":[{"id":"designation-finding","name":"Designations","description":"Designations and names.","questions":[{"text":"Which designations identify this nebula?","kind":"provenance"},{"text":"What is its common name?","kind":"definition"}]}]},{"id":"type","name":"Type","description":"Emission, reflection, dark.","findings":[{"id":"type-finding","name":"Type","description":"The type.","questions":[{"text":"What type of nebula is it?","kind":"definition"},{"text":"What makes it shine or appear dark?","kind":"definition"}]}]}]},{"id":"physical","name":"Physical","description":"Distance and make-up.","layers":[{"id":"distance","name":"Distance and size","description":"How far and big.","findings":[{"id":"distance-finding","name":"Distance","description":"Distance and size.","questions":[{"text":"How far away and how large is it?","kind":"measurement"},{"text":"By which method?","kind":"provenance"}]}]},{"id":"composition","name":"Composition","description":"Gas and dust.","findings":[{"id":"composition-finding","name":"Composition","description":"Composition.","questions":[{"text":"What is it made of?","kind":"measurement"},{"text":"What stars illuminate or form in it?","kind":"definition"}]}]}]},{"id":"observation","name":"Observation","description":"Seeing it.","layers":[{"id":"visibility","name":"Visibility","description":"Where and when.","findings":[{"id":"visibility-finding","name":"Visibility","description":"Visibility.","questions":[{"text":"When and where is it visible, and with what equipment?","kind":"action"},{"text":"How bright is it?","kind":"measurement"}]}]},{"id":"images","name":"Images","description":"Colour and processing.","findings":[{"id":"images-finding","name":"Image notes","description":"Image interpretation.","questions":[{"text":"Are images of it true or false colour?","kind":"boundary"},{"text":"Which filters were used?","kind":"provenance"}]}]}]},{"id":"science","name":"Science","description":"Star formation and death.","layers":[{"id":"role","name":"Role","description":"Birth or death.","findings":[{"id":"role-finding","name":"Role","description":"Role in stellar lifecycle.","questions":[{"text":"Is it a star-forming region or a stellar remnant?","kind":"definition"},{"text":"What is known about its history?","kind":"provenance"}]}]},{"id":"research","name":"Research","description":"Observations.","findings":[{"id":"research-finding","name":"Research","description":"Key observations.","questions":[{"text":"Which observatories have studied it?","kind":"provenance"},{"text":"What did they find?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Report a nebula's catalogue designations, type and distance from astronomical sources.","Help observers and imagers plan with positions and visibility."],"mustNot":["Present processed or false-colour images as natural colour without saying so.","Use others' astronomical images without credit.","Confuse planetary nebulae with planets or with star-forming nebulae."],"requiresHuman":["Publishing composite images under an observatory's or another person's name."]},"ethics":{"considerations":["Images shape public understanding; their processing should be honest.","Imagers and observatories deserve credit for their work."],"affectedParties":["Image creators","The public"]},"owners":{"steward":"Nobody: natural objects; astronomical catalogues record them.","roles":[],"masterSystems":[]},"relations":[{"target":"Q1054444","type":"parent","note":"registry parent class"},{"target":"Q249389","type":"parent","note":"registry parent class"},{"target":"astronomical object","type":"related","note":"deep-sky object"},{"target":"star","type":"related","note":"star formation"},{"target":"galaxy","type":"related","note":"interstellar medium"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.nebula","Wikidata: Q42372 (https://www.wikidata.org/wiki/Q42372)","Messier and NGC numbers: M or NGC plus number catalogues"]},"properties":{"applicability":"required","items":["size: 1-hundreds light years","density: 100-1000000 particles per cm3 - very low by Earth standards"]},"recognition":{"applicability":"required","items":["Extended glowing or dark regions","Designations such as M42 or NGC 7293","Galaxies were once called nebulae; modern usage separates them","Glowing clouds of red, green or blue light, or dark patches against stars; many are faint and need long exposures."]},"capabilities":{"applicability":"required","items":["observe and image it","classify it by type","measure its distance and composition","catalogue it"]},"hazards":{"applicability":"required","items":["Confusing historical nebula labels with galaxies","False-colour images misread as true colour"]},"interfaces":{"applicability":"required","items":["IAU nomenclature"]},"context":{"applicability":"required","items":["Nebulae are where stars form and where dying stars return material.","emission nebulae","reflection nebulae","dark nebulae and molecular clouds","planetary nebulae","supernova remnants"]}},"sources":[{"title":"Wikidata item Q42372: nebula","url":"https://www.wikidata.org/wiki/Q42372","note":"identity and sense of the item"},{"title":"Wikipedia: Nebula","url":"https://en.wikipedia.org/wiki/Nebula","note":"general description of the item"}],"openQuestions":["Should nebula types be separate entries?","How should image colour conventions be explained?","How should designations be cross-identified?"],"resources":{"spec":"/models/things/publications/thing-q42372/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q42372/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T05:28:49Z","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 2026-10-06T19:51:59+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}