WORLDWALKKepler-398 d
Kepler-398 d is a hot Earth-size planet orbiting an orange star 578.5 ly away. A year there lasts 6.8 days. It was found using the transit method: it dims its star as it passes in front. Note: its mass is estimated from its size.
What it would be like in Worldwalk imagined
Nobody has seen the surface of Kepler-398 d. The game builds it from the real numbers above: you land on dry, dusty desert rock.
- Air: thin CO₂ (carbon dioxide), N₂ (nitrogen) · a guess. Surface pressure: 0.95 bar.
- A 70 kg explorer would feel like 55 kg.
- A jump that clears 50 cm on Earth would reach about 63 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.