WORLDWALKGJ 9827 b
GJ 9827 b is a scorching super-Earth orbiting an orange star 96.7 ly away. A year there lasts 1.2 days. It was found using the transit method: it dims its star as it passes in front.
▶ Land on GJ 9827 bFree · plays in your browser
Gravity20.25 m/s²2.06× Earth measured
Size1.44× Earthradius measured
Mass4.28× Earthmeasured
Temperature≈ 762 °Cequilibrium temperature measured
Distance96.7 light-yearsfrom the Sun
Its star4,236 Kan orange dwarf
One year1.2 daystime to orbit its star
Discovered2017transit
What it would be like in Worldwalk imagined
Nobody has seen the surface of GJ 9827 b. The game builds it from the real numbers above: you land on a molten surface of lava seas.
- Air: rock vapor · a guess. Surface pressure: 0.002 bar.
- A 70 kg explorer would feel like 144 kg.
- A jump that clears 50 cm on Earth would reach about 24 cm.
- Every step is hard work: your legs carry far more than your body weight.
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.