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K2-17 b

K2-17 b is a hot large super-Earth orbiting an orange star 408 ly away. A year there lasts 18 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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EarthK2-17 b
Gravity11.05 m/s²1.13× Earth estimated
Size2.23× Earthradius measured
Mass5.6× Earthestimated
Temperature≈ 214 °Cequilibrium temperature measured
Distance408 light-yearsfrom the Sun
Its star4,320 Kan orange dwarf
One year18 daystime to orbit its star
Discovered2015transit

What it would be like in Worldwalk imagined

Nobody has seen the surface of K2-17 b. The game builds it from the real numbers above: you land on bare, cratered rock with no air.

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 K2-17 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.