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K2-123 b

K2-123 b is a warm water-rich world orbiting an orange star 526.9 ly away. A year there lasts 31 days. It was found using the transit method: it dims its star as it passes in front. 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.

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EarthK2-123 b
Gravity10.37 m/s²1.06× Earth estimated
Size2.76× Earthradius measured
Mass8.05× Earthestimated
Temperature≈ 65 °Cequilibrium temperature measured
Distance527 light-yearsfrom the Sun
Its star4,035 Kan orange dwarf
One year30.9 daystime to orbit its star
Discovered2017transit

What it would be like in Worldwalk imagined

Nobody has seen the surface of K2-123 b. The game builds it from the real numbers above: you land on hot, steamy shores of a water world.

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 K2-123 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.