WORLDWALKGJ 251 b
GJ 251 b is a warm water-rich world orbiting a red dwarf star 18.2 ly away. A year there lasts 14.2 days. It was found using the radial velocity method: it makes its star wobble. 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 size is estimated from its mass, only a minimum mass is known.
What it would be like in Worldwalk imagined
Nobody has seen the surface of GJ 251 b. The game builds it from the real numbers above: you land on hot, steamy shores of a water world.
- Air: H₂O (water vapor) steam, N₂ (nitrogen) · a guess. Surface pressure: 4.9 bar.
- A 70 kg explorer would feel like 84 kg.
- A jump that clears 50 cm on Earth would reach about 42 cm.
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.
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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.