{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.planet","code":"thing-q634","url":"https://ver.cy/models/thing/q634/","name":"planet","alternateNames":["ecumenopolis","exoplanet","unconfirmed exoplanet","inner planet of the Solar System","outer planet","Toroidal planet","Circumtriple planet","interplanetary","classical planet","terrestrial planet","inner and outer planets","Second generation planet"],"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 celestial body that orbits a star or stellar remnant, is massive enough for its gravity to make it nearly round, and has cleared its orbital neighbourhood, following the IAU 2006 definition for the Solar System; exoplanets use similar working criteria.","purpose":"Let an agent handle planets by definition, orbit, physical properties and discovery method, and deal with the boundary cases such as dwarf planets and unconfirmed exoplanets.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Orbits a star, unlike a moon","Has cleared its orbit, unlike a dwarf planet","Does not fuse hydrogen, unlike a star","Exoplanet status can be candidate, confirmed or disputed"],"structure":{"bundles":[{"id":"definition-and-status","name":"Definition and status","description":"Is it a planet.","layers":[{"id":"criteria","name":"Criteria","description":"IAU and exoplanet criteria.","findings":[{"id":"criteria-finding","name":"Status criteria","description":"Which criteria it meets.","questions":[{"text":"Which definition of planet applies here, and does the object meet it?","kind":"definition"},{"text":"Is it a dwarf planet or a brown dwarf instead?","kind":"boundary"}]}]},{"id":"confirmation","name":"Confirmation","description":"Candidate or confirmed.","findings":[{"id":"confirmation-finding","name":"Confirmation status","description":"The confirmation state.","questions":[{"text":"Is this planet confirmed, and by which method?","kind":"provenance"},{"text":"Has its existence been disputed?","kind":"provenance"}]}]}]},{"id":"orbit","name":"Orbit","description":"Its path around the star.","layers":[{"id":"elements","name":"Orbital elements","description":"Period, distance, eccentricity.","findings":[{"id":"elements-finding","name":"Orbital data","description":"The orbital parameters.","questions":[{"text":"What are its orbital period, distance and eccentricity?","kind":"measurement"},{"text":"Is it in the habitable zone?","kind":"boundary"}]}]},{"id":"system","name":"System","description":"Host star and siblings.","findings":[{"id":"system-finding","name":"System context","description":"The host star and other planets.","questions":[{"text":"Which star does it orbit, and what else is in the system?","kind":"definition"},{"text":"Are there resonances with other planets?","kind":"measurement"}]}]}]},{"id":"physical","name":"Physical properties","description":"Mass, radius and atmosphere.","layers":[{"id":"bulk","name":"Bulk properties","description":"Mass, radius, density.","findings":[{"id":"bulk-finding","name":"Bulk data","description":"Measured bulk values.","questions":[{"text":"What are its mass, radius and density?","kind":"measurement"},{"text":"Which values are measured and which inferred?","kind":"provenance"}]}]},{"id":"atmosphere","name":"Atmosphere and surface","description":"Composition and conditions.","findings":[{"id":"atmosphere-finding","name":"Atmosphere data","description":"Atmosphere and surface data.","questions":[{"text":"What is known about its atmosphere and surface?","kind":"measurement"},{"text":"How was that measured?","kind":"provenance"}]}]}]},{"id":"exploration","name":"Exploration","description":"Missions and protection.","layers":[{"id":"missions","name":"Missions","description":"Spacecraft and telescopes.","findings":[{"id":"missions-finding","name":"Missions","description":"Missions that studied it.","questions":[{"text":"Which missions have studied this planet?","kind":"provenance"},{"text":"Which are planned?","kind":"provenance"}]}]},{"id":"protection","name":"Planetary protection","description":"Avoiding contamination.","findings":[{"id":"protection-finding","name":"Protection category","description":"The planetary protection category.","questions":[{"text":"Which planetary protection category applies to missions here?","kind":"provenance"},{"text":"What does it require?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Report planet properties and exoplanet status from official catalogues with the source.","Distinguish confirmed planets from candidates."],"mustNot":["Present a planet candidate as confirmed.","Mix Solar System and exoplanet criteria without saying so.","Plan or support a mission that would contaminate another world against planetary protection rules."],"requiresHuman":["Any decision to land on or return samples from another world."]},"ethics":{"considerations":["Other worlds may hold life or traces of it, and contamination cannot be undone.","Claims of habitable worlds shape public expectations of science."],"affectedParties":["Future science and exploration","Any life that may exist elsewhere"]},"owners":{"steward":"Nobody owns a planet; space treaties bar national appropriation of celestial bodies.","roles":[],"masterSystems":["Planetary and exoplanet catalogues of the astronomical community"]},"relations":[{"target":"Q3132741","type":"parent","note":"registry parent class"},{"target":"Q400144","type":"parent","note":"registry parent class"},{"target":"astronomical object","type":"related","note":"a major class"},{"target":"star","type":"related","note":"planets belong to planetary systems"},{"target":"moon","type":"related","note":"natural satellites are separate entries"},{"target":"dwarf planet","type":"related","note":"Pluto and others fail the cleared-orbit criterion"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.planet","Wikidata: Q634 (https://www.wikidata.org/wiki/Q634)","exoplanet name: host star plus letter, such as 51 Pegasi b standard designation","NASA Exoplanet Archive entry: archive record confirmed exoplanets"]},"properties":{"applicability":"required","items":["mass: 0.055-318 Earth masses - Mercury to Jupiter; exoplanets up to about 13 Jupiter masses","orbital period: hours to thousands of years time"]},"recognition":{"applicability":"required","items":["Steady light and motion along the ecliptic","Visible discs in a telescope for Solar System planets","Exoplanets are detected indirectly, as dips in starlight or stellar wobble","Solar System planets appear as bright, steady points that move against the stars; exoplanets are almost never seen directly."]},"capabilities":{"applicability":"required","items":["observe it, directly or by transit and radial velocity methods","characterise it, for mass, radius, orbit and atmosphere","explore it, with spacecraft","name it, under IAU rules"]},"hazards":{"applicability":"required","items":["Treating candidates as confirmed exoplanets","Mixing Solar System and exoplanet definitions","Contaminating other worlds, which planetary protection prevents"]},"interfaces":{"applicability":"required","items":["IAU Resolution B5 (2006) definition of planet","IAU naming rules for exoplanets","COSPAR planetary protection policy"]},"context":{"applicability":"required","items":["Understanding planetary systems, the Earth and the potential for life elsewhere.","terrestrial planets","gas giants","ice giants","exoplanets: hot Jupiters, super-Earths, mini-Neptunes","rogue planets"]}},"sources":[{"title":"Wikidata item Q634: planet","url":"https://www.wikidata.org/wiki/Q634","note":"identity and sense of the item"},{"title":"Wikipedia: Planet","url":"https://en.wikipedia.org/wiki/Planet","note":"general description of the item"}],"openQuestions":["Should exoplanets be registered as instances linked to host stars?","How should disputed and retracted exoplanets be marked?","Should the registry adopt a working exoplanet definition?"],"resources":{"spec":"/models/things/publications/thing-q634/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q634/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T04:35:51Z","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 2026-10-06T19:52:01+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}