WORLDWALKKepler-78 b
An Earth-size planet with a year of just 8.5 hours. Its surface is likely molten on the dayside.
▶ Land on Kepler-78 bFree · plays in your browser
Gravity11.43 m/s²1.17× Earth measured
Size1.2× Earthradius measured
Mass1.68× Earthmeasured
Temperature≈ 1,950 °Cequilibrium temperature measured
Distance406 light-yearsfrom the Sun
Its star5,058 Kan orange dwarf, in a system of 2 stars
One year8.6 hourstime to orbit its star
Discovered2013transit
What it would be like in Worldwalk imagined
Nobody has seen the surface of Kepler-78 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: 0.005 bar.
- A 70 kg explorer would feel like 82 kg.
- A jump that clears 50 cm on Earth would reach about 43 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 Kepler-78 bSimilar worlds nearby
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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.