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Exoplanet Explorer: 5,900 real exoplanets, run through our physics

Every confirmed planet astronomers have measured well enough to build — its real mass, radius, orbit and star, fed into the same simulation that runs everything else here. It decides what each one becomes and scores it for habitability. 10 of them come out Earth-like.

Browse every kind of world

Lava worlds, ice giants, ocean planets, worlds of solid carbon. Every planet here is sorted by what our simulation says it is, run from its real mass, orbit and star — not by anything the catalogue records. Pick a type to see all of them.

Just added

11 this week

Every planet confirmed and added in the last week, newest discoveries first: already built and scored by the same physics as everything else here.

The most habitable

scored by TerraForge, not by NASA

Lists and explainers

Curated lists with the story behind them, and plain-language articles on how the simulation decides what each planet is.

Real star systems

Some of the most interesting systems we know of: worlds our simulation thinks could hold life, and the most crowded planetary systems yet found. Open one to watch every world orbit its star, then click any planet to visit it.

This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Worlds listed only by the Extrasolar Planets Encyclopaedia (exoplanet.eu) are used under CC BY 4.0 (Schneider et al. 2011, A&A 532, A79).

A dark ringed planet hanging over the horizon of a rocky moon, its rings lit by a distant sun

New: Stand on Your Moons 🌒

A planet's surface view isn't the only ground any more. Press the surface button on a planet with moons and it asks where to stand: the planet itself, or any moon still in orbit, each tagged with what it became — ocean, ice, carbon, volcanic. Every moon gets its own ground and sky from its own physics: airless rock under a black sky, ice cracked by geysers over a hidden sea, sulfur plains shaking with eruptions, or orange haze you can't see the sun through. And hanging over the horizon, there's the planet you built.

Create your free account

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We only keep your email and the username you choose. We never share or sell your email, and we don't send marketing — we use it only to email you a sign-in code. Read our privacy policy.

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We're still building out the best experience we can — and we'd love your input. Tell us about features you enjoy, ideas you'd like to see, or pain points where something feels off, and we'll know where to look next.

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