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all confirmed exoplanets orbiting a named host star, with stellar properties and each planet's orbital period, size class, and habitable-zone position.","exampleAgentPrompt":"Can you pull up all the confirmed planets orbiting TRAPPIST-1, including which ones are in the habitable zone and what the star itself is like — mass, temperature, distance from us?","exampleUseCases":[{"title":"Habitable-zone planet hunt for a star","prompt":"List all confirmed planets around Kepler-442 and tell me which ones fall inside the habitable zone, along with the star's temperature and luminosity."},{"title":"Multi-planet system overview for research","prompt":"I'm putting together a summary of the Kepler-90 system — can you fetch all its confirmed planets with their orbital periods, sizes, and any habitable-zone info?"},{"title":"Comparing nearby star planetary systems","prompt":"What confirmed exoplanets orbit Proxima Centauri, and what are the star's properties like mass, spectral type, and distance from Earth?"}],"resultDescription":"A JSON object containing the host star's properties (name, mass, radius, spectral type, temperature, luminosity, age, distance) and an array of all confirmed orbiting planets, each with name, orbital period, radius, mass, size class, insolation, equilibrium temperature, habitable-zone position, discovery year, and discovery method. Also includes a summary, verdict, and data source attribution.","failureModes":["Star name not found in NASA archive returns empty planet array or null star object","Misspelled or ambiguous star names may return no results","Some star or planet fields may be null if data is not available in the archive","Network or upstream NASA API outage returns error response","Degraded mode flag may indicate partial data availability"],"whenToPreferThis":"Use this endpoint when you need a comprehensive per-star planetary catalog including both stellar context and individual planet properties in a single call. Prefer this over individual planet endpoints when surveying an entire multi-planet system, checking habitable-zone membership across all planets of a host star, or enriching star-specific research with structured planet data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:13:45.282Z","isFirstParty":false,"canonicalSlug":"nasa-exoplanets-host-star-planet-catalog-8b8b9da9"}