WORLDWALKTRAPPIST-1 h
The outermost and coldest TRAPPIST-1 planet, receiving only about 14% of the starlight Earth gets.
▶ Land on TRAPPIST-1 hFree · plays in your browser
Gravity5.61 m/s²0.57× Earth measured
Size0.76× Earthradius measured
Mass0.33× Earthmeasured
Temperature≈ −101 °Cequilibrium temperature measured
Distance40.5 light-yearsfrom the Sun
Its star2,566 Ka cool red dwarf
One year18.8 daystime to orbit its star
Discovered2017transit
What it would be like in Worldwalk imagined
Nobody has seen the surface of TRAPPIST-1 h. The game builds it from the real numbers above: you land on a frozen shell of ice.
- Air: thin N₂ (nitrogen) · a guess. Surface pressure: 0.05 bar.
- A 70 kg explorer would feel like 40 kg.
- A jump that clears 50 cm on Earth would reach about 87 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.
Play TRAPPIST-1 hOther planets around TRAPPIST-1
TRAPPIST-1 b1.1× EarthTRAPPIST-1 c1.09× EarthTRAPPIST-1 d0.62× EarthTRAPPIST-1 e0.82× EarthTRAPPIST-1 f0.95× EarthTRAPPIST-1 g1.04× Earth
Similar worlds nearby
LHS 475 b40.7 light-yearsGJ 1132 b41.1 light-yearsGJ 1132 c41.1 light-yearsGliese 12 b39.8 light-yearsGJ 806 b39.3 light-yearsHD 101581 b41.7 light-years
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.