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GJ 238 b

GJ 238 b is a hot small rocky planet orbiting a red dwarf star 49.6 ly away. A year there lasts 1.7 days. It was found using the transit method: it dims its star as it passes in front. Note: its mass is estimated from its size.

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EarthGJ 238 b
Gravity3.93 m/s²0.4× Earth estimated
Size0.57× Earthradius measured
Mass0.13× Earthestimated
Temperature≈ 485 °Cequilibrium temperature measured
Distance49.6 light-yearsfrom the Sun
Its star3,485 Ka red dwarf
One year1.7 daystime to orbit its star
Discovered2024transit

What it would be like in Worldwalk imagined

Nobody has seen the surface of GJ 238 b. The game builds it from the real numbers above: you land on dry, dusty desert rock.

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 GJ 238 b

Similar worlds nearby

LHS 1140 c48.9 light-yearsLHS 3844 b48.5 light-yearsGJ 3929 b51.6 light-yearsG 264-012 b52.2 light-yearsHD 21749 c53.2 light-yearsTOI-540 b45.7 light-years

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.