{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.eyeball-planet","code":"thing-q30675096","url":"https://ver.cy/models/thing/q30675096/","name":"eyeball planet","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.2","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 hypothetical type of tidally locked exoplanet whose surface conditions vary strongly between the permanent day side and night side, giving an eyeball-like appearance in models, for example a hot day-side pupil of exposed rock or a temperate ring of liquid water between an icy night side and a scorched substellar point; eyeball planets are predicted around red dwarfs and are unconfirmed.","purpose":"Let an agent explain the eyeball planet concept, its physical basis in tidal locking, its relevance to habitability, and its status as a modelled rather than observed planet type.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Tidal locking","Substellar hot spot","Potential habitable ring","Modelled, not confirmed"],"structure":{"bundles":[{"id":"concept","name":"Concept","description":"What it means.","layers":[{"id":"locking","name":"Locking","description":"Tidal locking.","findings":[{"id":"locking-finding","name":"Locking","description":"Tidal locking.","questions":[{"text":"Why do close-in planets become tidally locked, and what does that do to their climate?","kind":"definition"},{"text":"Which planets are likely locked?","kind":"provenance"}]}]},{"id":"types","name":"Types","description":"Hot and icy models.","findings":[{"id":"types-finding","name":"Types","description":"Models.","questions":[{"text":"How do hot and icy eyeball planet models differ?","kind":"definition"},{"text":"What determines which occurs?","kind":"provenance"}]}]}]},{"id":"habitability","name":"Habitability","description":"Life potential.","layers":[{"id":"ring","name":"Ring","description":"Habitable ring.","findings":[{"id":"ring-finding","name":"Ring","description":"Habitable ring.","questions":[{"text":"Could a temperate ring on an eyeball planet support liquid water, according to models?","kind":"provenance"},{"text":"What role do oceans and atmospheres play in heat transport?","kind":"definition"}]}]},{"id":"caveats","name":"Caveats","description":"Uncertainties.","findings":[{"id":"caveats-finding","name":"Caveats","description":"Caveats.","questions":[{"text":"Which uncertainties limit habitability claims?","kind":"boundary"},{"text":"Is the concept presented as hypothetical?","kind":"boundary"}]}]}]},{"id":"observe","name":"Observe","description":"Candidates and tests.","layers":[{"id":"candidates","name":"Candidates","description":"Candidate planets.","findings":[{"id":"candidates-finding","name":"Candidates","description":"Candidates.","questions":[{"text":"Which known exoplanets are proposed as possible eyeball planets, and by whom?","kind":"provenance"},{"text":"What data exist on them?","kind":"provenance"}]}]},{"id":"methods","name":"Methods","description":"How to test.","findings":[{"id":"methods-finding","name":"Methods","description":"Methods.","questions":[{"text":"How could phase curves or spectra test eyeball planet models?","kind":"provenance"},{"text":"Which telescopes could do it?","kind":"provenance"}]}]}]},{"id":"learn","name":"Learn","description":"Explaining.","layers":[{"id":"explain","name":"Explain","description":"Plain language.","findings":[{"id":"explain-finding","name":"Explain","description":"Plain explanation.","questions":[{"text":"How can the eyeball planet idea be explained simply and accurately?","kind":"action"},{"text":"Which images or models help?","kind":"action"}]}]},{"id":"culture","name":"Culture","description":"In fiction.","findings":[{"id":"culture-finding","name":"Culture","description":"Fiction.","questions":[{"text":"How have eyeball planets appeared in science fiction?","kind":"provenance"},{"text":"Which entry fits a fictional planet?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Explain the eyeball planet concept and its implications for habitability, citing studies.","Report which known exoplanets may be tidally locked from catalogues."],"mustNot":["Present eyeball planets as observed or as confirmed habitable worlds.","Claim that life has been found on such a planet without evidence.","Attribute model results to researchers who did not produce them."],"requiresHuman":["Publishing claims about habitability of a specific planet."]},"ethics":{"considerations":["Claims of habitable worlds attract strong public attention and are easily overstated.","Credit for theoretical work belongs to those who proposed it."],"affectedParties":["Readers and students","Researchers"]},"owners":{"steward":"Nobody owns the idea; the scientific community evaluates it.","roles":[],"masterSystems":["Exoplanet catalogues"]},"relations":[{"target":"Q1974542","type":"parent","note":"registry parent class"},{"target":"hypothetical planet","type":"related","note":"category"},{"target":"superior planet","type":"related","note":"other planet classification"},{"target":"red dwarf","type":"related","note":"typical host"},{"target":"celestial body","type":"related","note":"broader class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.eyeball-planet","Wikidata: Q30675096 (https://www.wikidata.org/wiki/Q30675096)"]},"properties":{"applicability":"required","items":["Surface temperature:  kelvin - Temperature distributions are predicted with climate models, while unresolved thermal observations would constrain only some aspects of those predictions.","Planetary radius:  kilometres - Radius is a model parameter that can be constrained for a transiting candidate from its transit depth and the host star's radius.","Rotation period:  Earth days - In the synchronous rotation model underlying this concept, the rotation period equals the orbital period rather than having a universal numerical value.","Surface ice coverage:  percent - Ice coverage is calculated as the fraction of modeled surface area covered by ice and has not been established observationally for this hypothetical planet type."]},"recognition":{"applicability":"required","items":["Tidally locked to its star","Strong day-night contrast","Hot Jupiters are gas giants, not eyeball planets","Not observed directly; modelled as a planet with a distinct substellar region and contrasting hemispheres."]},"capabilities":{"applicability":"required","items":["explain tidal locking and day-night contrast","describe hot and icy eyeball planet models","relate to habitability around red dwarfs","clarify hypothetical status"]},"hazards":{"applicability":"required","items":["Presenting models as observations","Overstating habitability"]},"interfaces":{"applicability":"required","items":["No regulation"]},"context":{"applicability":"required","items":["Exoplanet science and habitability research.","hot eyeball planets with exposed substellar rock","icy eyeball planets with a liquid ring","candidate planets around red dwarfs"]}},"sources":[{"title":"Wikidata item Q30675096: eyeball planet","url":"https://www.wikidata.org/wiki/Q30675096","note":"identity and sense of the item"},{"title":"Wikipedia: Eyeball planet","url":"https://en.wikipedia.org/wiki/Eyeball_planet","note":"general description of the item"}],"openQuestions":["Should tidal locking be a separate entry?","How should exoplanet catalogues be linked?","How should climate models be attributed?"],"resources":{"spec":"/models/things/publications/thing-q30675096/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q30675096/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T19:32:26Z","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 2026-10-07T10:10:29+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}