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TOI-2257 b

TOI-2257 b is a temperate water-rich world orbiting a red dwarf star 188.5 ly away. A year there lasts 35.2 days. It was found using the transit method: it dims its star as it passes in front. Its temperature could allow liquid water, which makes it a habitable-zone candidate, not a confirmed habitable world. Planets this size may be wrapped in thick gas; the game imagines it as a solid or water world you can walk on. Note: its mass is estimated from its size. It sits where a planet could be warm enough for liquid water, in the so-called habitable zone.

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EarthTOI-2257 b
Gravity11.15 m/s²1.14× Earth estimated
Size2.19× Earthradius measured
Mass5.45× Earthestimated
Temperature≈ −17 °Cequilibrium temperature measured
Distance188 light-yearsfrom the Sun
Its star3,430 Ka red dwarf
One year35.2 daystime to orbit its star
Discovered2021transit

What it would be like in Worldwalk imagined

Nobody has seen the surface of TOI-2257 b. The game builds it from the real numbers above: you land on a deep ocean under a hydrogen sky.

Pack the right suit. Choose 3 of 6 modules (cooling, heating, pressure hull, extra oxygen, radiation shield, jetpack), complete 3 surveys and get back to the lander before your oxygen runs out.

Play TOI-2257 b

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Sizes, masses, temperatures and orbits come from the NASA Exoplanet Archive (Planetary Systems Composite table). Values marked estimated are calculated from the other measurements; the surface and air are imagined for the game.