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SPECULOOS-3 b

SPECULOOS-3 b is a hot Earth-size planet orbiting a red dwarf star. A year there lasts 17 hours. It was found using the transit method: it dims its star as it passes in front. Note: its mass is estimated from its size.

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EarthSPECULOOS-3 b
Gravity9.09 m/s²0.93× Earth estimated
Size0.98× Earthradius measured
Mass0.89× Earthestimated
Temperature≈ 280 °Cequilibrium temperature measured
Distanceunknown distancefrom the Sun
Its star2,800 Ka red dwarf
One year17.3 hourstime to orbit its star
Discovered2024transit

What it would be like in Worldwalk imagined

Nobody has seen the surface of SPECULOOS-3 b. The game builds it from the real numbers above: you land on bare, cratered rock with no air.

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 SPECULOOS-3 b

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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.