{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.natural-satellite-habitability","code":"thing-q6980782","url":"https://ver.cy/models/thing/q6980782/","name":"natural satellite habitability","alternateNames":[],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Cross-cutting context","entryKind":"thing","plane":"XCT","domain":["XCT.QLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"Natural satellite habitability is the capacity of an environment on or within a naturally occurring satellite to support life, usually assessed for life as known on Earth through the availability and persistence of suitable solvents, chemical ingredients and usable energy.","purpose":"Enable an AI agent to assess whether a natural satellite could sustain a specified form of life, identify the evidence and assumptions behind that assessment, and choose observations that reduce uncertainty.","scope":{"in":["Definitions of habitability and their biological, spatial and temporal assumptions","Surface, subsurface ocean and other explicitly hypothesised habitats on natural satellites","Effects of the host planet, stellar environment and satellite orbit on environmental suitability","Availability and accessibility of solvents, usable energy and necessary chemical constituents","Evidence, uncertainty and operational criteria supporting habitat-specific assessments","Persistence of suitable conditions and observations that could test them"],"out":["Detection of life and interpretation of biosignatures as evidence of inhabitedness","General satellite classification, formation and geology except where they constrain habitability","Habitability of planets considered independently of their satellites","Human settlement feasibility, life-support engineering and terraforming","Artificial satellites and engineered orbital habitats","Mission engineering and planetary protection policy beyond constraints on proposed investigations"],"boundaries":[]},"distinguishingFeatures":["The assessed environment belongs to a natural satellite; the host planet supplies boundary conditions rather than being the habitat under assessment.","A judgement specifies biological requirements and an environmental compartment instead of treating the entire moon as uniformly habitable.","The assessment addresses solvent, accessible chemistry, usable energy and persistence together; identifying water alone does not satisfy its criteria.","Orbital and planetary influences are evaluated explicitly, including tidal forcing, eclipses, planetary illumination and magnetospheric exposure where relevant.","Suitable conditions can support a habitability judgement without demonstrating that organisms exist there."],"structure":{"bundles":[{"id":"habitability-meaning-and-boundaries","name":"Habitability meaning and boundaries","description":"Defines what qualifies as a habitable environment on the satellite and whose criteria are being applied.","layers":[{"id":"biological-reference","name":"Biological reference","description":"Separates interpretations based on survival, reproduction, ecosystem persistence or alternative biology.","findings":[{"id":"criterion-dependent-judgement","name":"Criterion-dependent judgement","description":"Record the adopted definition, its proponents or source, and the biological capabilities it requires.","questions":[{"text":"Does habitability mean temporary survival, sustained reproduction or ecosystem persistence in this assessment?","id":"criterion-dependent-judgement-q01","kind":"definition"},{"text":"Which research source or investigator supplies these criteria, and what competing interpretation would change the judgement?","id":"criterion-dependent-judgement-q02","kind":"provenance"}]}]},{"id":"habitat-boundary","name":"Habitat boundary","description":"Locates the assessed environment within the moon and separates suitability from inhabitedness.","findings":[{"id":"compartment-specific-instance","name":"Compartment-specific instance","description":"Treat a specified compartment during a specified interval as the instance being assessed.","questions":[{"text":"Is the candidate habitat a surface environment, ice-associated pocket, subsurface ocean or another bounded compartment?","id":"compartment-specific-instance-q01","kind":"boundary"},{"text":"What operational criteria would qualify this compartment as habitable without requiring evidence that life is present?","id":"compartment-specific-instance-q02","kind":"definition"}]}]}]},{"id":"orbital-and-external-environment","name":"Orbital and external environment","description":"Connects the moon's stellar and planetary setting to conditions in the proposed habitat.","layers":[{"id":"illumination-and-exposure","name":"Illumination and exposure","description":"Assesses external energy inputs and potentially damaging exposure at the habitat.","findings":[{"id":"habitat-level-external-forcing","name":"Habitat-level external forcing","description":"Record stellar illumination, planetary contributions, eclipse effects and radiation exposure after accounting for shielding.","questions":[{"text":"How do stellar flux, planetary illumination and eclipse timing affect the candidate habitat's energy balance?","id":"habitat-level-external-forcing-q01","kind":"measurement"},{"text":"What radiation reaches the compartment after atmospheric, ice, water or rock shielding, and how does it compare with the adopted biological limits?","id":"habitat-level-external-forcing-q02","kind":"measurement"}]}]},{"id":"orbital-evolution","name":"Orbital evolution","description":"Assesses how orbital configurations maintain or alter environmental forcing.","findings":[{"id":"tidal-forcing-history","name":"Tidal forcing history","description":"Record how eccentricity, resonances and interior response enter estimates of tidal heating and its duration.","questions":[{"text":"Which measured or assumed orbital and interior properties control the estimated magnitude and distribution of tidal heating?","id":"tidal-forcing-history-q01","kind":"measurement"},{"text":"Over what interval does the orbital model support the forcing required by the proposed habitat?","id":"tidal-forcing-history-q02","kind":"boundary"}]}]}]},{"id":"solvent-and-interior-habitat","name":"Solvent and interior habitat","description":"Evaluates the existence, physical suitability and connectivity of proposed liquid environments.","layers":[{"id":"liquid-environment","name":"Liquid environment","description":"Connects evidence for a solvent reservoir to conditions required by the adopted biology.","findings":[{"id":"solvent-suitability","name":"Solvent suitability","description":"Record solvent identity, phase conditions, composition and their compatibility with the biological reference.","questions":[{"text":"What observations support a liquid reservoir, and which alternative explanations remain viable?","id":"solvent-suitability-q01","kind":"provenance"},{"text":"What ranges of temperature, pressure, salinity and water activity are supported, and which satisfy the adopted criteria?","id":"solvent-suitability-q02","kind":"measurement"}]}]},{"id":"interior-connectivity","name":"Interior connectivity","description":"Examines boundaries between liquid, ice and rock and their effects on habitat exchange.","findings":[{"id":"reservoir-contact-and-exchange","name":"Reservoir contact and exchange","description":"Record whether the proposed habitat exchanges material with rock, surface deposits or other reservoirs, including possible isolating layers.","questions":[{"text":"Does the interior model permit liquid-rock contact, or place intervening layers between the solvent and rocky material?","id":"reservoir-contact-and-exchange-q01","kind":"boundary"},{"text":"What evidence constrains exchange through ice, fractures, circulation or plume pathways?","id":"reservoir-contact-and-exchange-q02","kind":"provenance"}]}]}]},{"id":"metabolic-resources-and-persistence","name":"Metabolic resources and persistence","description":"Evaluates whether accessible chemistry and energy can support the stated biological endpoint over time.","layers":[{"id":"accessible-chemical-energy","name":"Accessible chemical energy","description":"Distinguishes available metabolic pathways from bulk heat and inventories of isolated constituents.","findings":[{"id":"resource-and-reaction-budget","name":"Resource and reaction budget","description":"Record candidate energy pathways, required constituents, environmental reaction conditions and delivery rates.","questions":[{"text":"Which photochemical or chemical energy pathways are compatible with the proposed habitat and biological reference?","id":"resource-and-reaction-budget-q01","kind":"definition"},{"text":"What constrains the delivery and replenishment of required nutrients and, where relevant, electron donors and acceptors within the same compartment?","id":"resource-and-reaction-budget-q02","kind":"measurement"}]}]},{"id":"temporal-sufficiency","name":"Temporal sufficiency","description":"Tests whether suitable conditions and resource supplies overlap for a biologically relevant interval.","findings":[{"id":"continuity-and-bottlenecks","name":"Continuity and bottlenecks","description":"Record the duration, interruptions and limiting processes of the proposed habitable state.","questions":[{"text":"For how long do suitable solvent conditions, usable energy and accessible constituents coexist?","id":"continuity-and-bottlenecks-q01","kind":"measurement"},{"text":"Would freezing, resource exhaustion, orbital evolution or disruptive events end suitability under the adopted biological endpoint?","id":"continuity-and-bottlenecks-q02","kind":"boundary"}]}]}]},{"id":"evidence-and-assessment-decisions","name":"Evidence and assessment decisions","description":"Makes habitability conclusions traceable and identifies investigations that could change them.","layers":[{"id":"inference-and-operationalisation","name":"Inference and operationalisation","description":"Connects observations and models to explicit assessment rules.","findings":[{"id":"traceable-conditional-assessment","name":"Traceable conditional assessment","description":"Record support for each necessary condition, competing explanations and the rule used to combine them into a judgement.","questions":[{"text":"Which necessary conditions are measured, inferred from models, borrowed from analogues or left unconstrained?","id":"traceable-conditional-assessment-q01","kind":"provenance"},{"text":"What decision rule produces the assessment, and how does it handle an unknown necessary condition or disagreement between models?","id":"traceable-conditional-assessment-q02","kind":"definition"}]}]},{"id":"discriminating-investigation","name":"Discriminating investigation","description":"Selects observations by their ability to resolve a consequential habitability uncertainty.","findings":[{"id":"next-observation-value","name":"Next-observation value","description":"Connect proposed investigations to specific assessment changes while accounting for whether sampled material represents the habitat.","questions":[{"text":"Which feasible observation would most clearly distinguish the leading explanations for the habitat's limiting condition?","id":"next-observation-value-q01","kind":"action"},{"text":"If surface or plume material is sampled, what must be established before treating its composition as representative of the proposed subsurface habitat?","id":"next-observation-value-q02","kind":"boundary"}]}]}]},{"id":"evidence-and-external-alignment","name":"Evidence and external alignment","description":"What the world already says about this thing, gathered so the model can be checked against it.","layers":[{"id":"reported-evidence","name":"Reported evidence","description":"Findings from the breadth pass, kept separate from the structural claims.","findings":[{"id":"evidence-confidence-notes","name":"Check these first","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these check these first hold for the sense of natural satellite habitability this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-kinds","name":"Kinds and varieties","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these kinds and varieties hold for the sense of natural satellite habitability this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-real-world-use","name":"Real-world use","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these real-world use hold for the sense of natural satellite habitability this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these typical measurements hold for the sense of natural satellite habitability this model covers, and on what evidence?","id":"evidence-measurements-q01","kind":"provenance"}]},{"id":"evidence-failure-modes-and-hazards","name":"Failure modes and hazards","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of natural satellite habitability this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-neighbours","name":"Neighbouring kinds and how to tell them apart","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of natural satellite habitability this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Explain the factors used to assess whether moons could host life, citing current research.","Summarize mission findings about specific moons with their source and date."],"mustNot":["Present speculation about life on a moon as a confirmed discovery.","Overstate habitability in ways that serve hype or fundraising over evidence.","Dismiss planetary-protection concerns about contaminating potentially habitable moons."],"requiresHuman":["Publishing a claim of evidence for life beyond Earth."]},"ethics":{"considerations":["False claims of alien life damage public trust in science.","Contaminating another world could destroy evidence of life or harm it."],"affectedParties":["The public","Scientists","Any life that may exist there"]},"owners":{"steward":"Nobody: a property of natural bodies; space agencies answer for missions that study them.","roles":[],"masterSystems":[]},"relations":[{"target":"Q21012180","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.natural-satellite-habitability","Wikidata: Q6980782 (https://www.wikidata.org/wiki/Q6980782)"]},"properties":{"applicability":"not-applicable","items":["Habitability interpretation: Earth-like microbial survival; sustained growth and reproduction; ecosystem persistence; explicitly specified alternative","Assessed habitat compartment: Surface liquid environment; ice-associated brine; subsurface ocean; pore fluid; explicitly hypothesised alternative","Satellite-host-star configuration: Identified or hypothesised moon, host planet and stellar system, with orbital parameter estimates","Solvent conditions: Solvent identity; temperature in K; pressure in Pa; water activity where applicable; uncertainty intervals","Energy supply to the habitat: Radiative or thermal flux in W/m²; reaction-specific free energy in kJ/mol and reactant supply in mol/s where constrained","Chemical availability and transport: For each required constituent: detected; inferred accessible; inferred isolated; unconstrained","Duration and continuity of suitability: Estimated suitable interval in years; recurrence interval and duty cycle for intermittent habitats","Assessment status: Supported under stated criteria; conditionally plausible; contradicted under stated criteria; insufficient evidence","Evidence basis: Direct local measurement; remote observation; laboratory analogue; model inference; explicit assumption"]},"recognition":{"applicability":"not-applicable","items":[]},"capabilities":{"applicability":"required","items":["Compare assessments of the same moon under different biological definitions and habitat boundaries.","Identify the limiting or unconstrained requirement in a proposed surface or subsurface habitat.","Explore how orbital, thermal and chemical assumptions change the assessment.","Select observations that discriminate between competing interior or environmental models.","Update a habitat-specific judgement when new evidence changes a necessary condition.","Compare moons while preserving differences in evidence quality and assumed biological requirements."]},"hazards":{"applicability":"required","items":["Forward contamination by spacecraft can compromise future searches for life.","Sensational reporting can mislead people about scientific results."]},"interfaces":{"applicability":"required","items":["Outer Space Treaty, Article IX, United Nations.","COSPAR Policy on Planetary Protection, Committee on Space Research."]},"context":{"applicability":"required","items":["Natural satellite habitability is assessed in astrobiology and planetary science when investigating environments on or inside moons.","Assessments help prioritize observations and missions by examining evidence for suitable solvents, chemical ingredients and usable energy.","A potentially habitable environment does not by itself establish that life is present."]}},"sources":[{"title":"Wikidata item Q6980782: natural satellite habitability","url":"https://www.wikidata.org/wiki/Q6980782","note":"identity and sense of the item"},{"title":"Wikipedia: Habitability of natural satellites","url":"https://en.wikipedia.org/wiki/Habitability_of_natural_satellites","note":"general description of the item"}],"openQuestions":["Which operational definitions and thresholds are used by different research communities, and where do survival, reproduction and ecosystem criteria produce conflicting assessments?","How reliably can remote observations distinguish a biologically suitable ocean from a liquid reservoir with unsuitable composition or limited chemical exchange?","What delivery and replenishment rates of nutrients and chemical reactants are defensible for particular ice-covered satellite habitats?","How strongly do uncertain orbital histories and interior responses limit estimates of long-term habitat persistence, especially for exomoons?","What experimental evidence would justify evaluating non-water satellite environments against a specified alternative biology?"],"resources":{"spec":"/models/things/publications/thing-q6980782/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q6980782/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T11:32:52Z","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":"not-applicable","interaction.recognition":"not-applicable","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 2026-10-07T10:10:32+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane XCT: no invented physical properties.","interaction.recognition":"Natural satellite habitability is an inferred environmental capacity without a distinctive visual appearance."},"score":1.0}}