Destroyed — no longer habitableMagnetic FieldExtreme Activity
Why is this a Volcanic World?Runaway tidal heating from its moons drives volcanism across a cold crust - the planet is kneaded like Io.
Resonant, close-in moons pump orbital eccentricity, and the resulting tidal flexing dissipates enormous heat in the interior. Only a fraction of the surface is molten at once, so the ground between the vents stays as cold as the orbit allows - Io's own equilibrium temperature is about 110 K.
Classification Criteria:
✓ Close-in moons in a resonant configuration✓ Tidal heat flux beyond the runaway threshold- The orbit is not what melted it: 0.96 AU, 305K equilibrium
Habitability
Destroyed — no longer habitable
Physical Properties
Mass
12.00x Earth (7.17e+25 kg)
Radius
2.29x Earth (14,586 km)
Surface Gravity
2.29x Earth (22.5 m/s²)
Surface Temperature
305 K (32 °C / 90 °F)
Rotation Period
2.0 hours/day (faster than Earth)
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
0.96 AU (144 million km)
Orbital Period
344 days
Atmosphere
Volcanic outgassing - sulfur compounds and vaporized rock
Elemental Composition
H - Hydrogen
27.9%
N - Nitrogen
23.5%
He - Helium
19.1%
Surface Characteristics
Runaway tidal heating drives volcanism across a cold crust - lava lakes and sulfur plains between frozen plains