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K2-173 b

K2-173 b is a frozen water-rich world orbiting a Sun-like star 745.7 ly away. A year there lasts 5.9 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, its temperature is unknown, so the game assumes one.

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EarthK2-173 b
Gravity12.19 m/s²1.24× Earth estimated
Size1.61× Earthradius measured
Mass3.22× Earthestimated
Temperature?unknown: the game assumes about −153 °C
Distance746 light-yearsfrom the Sun
Its star5,580 Ka Sun-like star
One year5.9 daystime to orbit its star
Discovered2018transit

What it would be like in Worldwalk imagined

Nobody has seen the surface of K2-173 b. The game builds it from the real numbers above: you land on a frozen shell of ice.

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 K2-173 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.