Earth (After the moon formed)

Lava World

Magnetic FieldExtreme Activity

Why is this a Lava World?Runaway tidal heating from its moons keeps the surface molten - the planet is kneaded like Io, only far harder.

Resonant, close-in moons pump orbital eccentricity, and the resulting tidal flexing dissipates enormous heat in the interior. Past a threshold the crust cannot cool: volcanism resurfaces the world continuously.

Classification Criteria:

✓ Close-in moons in a resonant configuration✓ Tidal heat flux beyond the runaway threshold- Orbit itself was fine: 0.99 AU, 279K equilibrium

Habitability ScoreExtremely Harsh

Contributing Factors

water20

Very dry - minimal water

geology40

Extreme volcanic activity may be hazardous

rotation10

Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only

Organic Chemistry20

Limited organic chemistry potential

atmosphere16

Atmosphere present but composition not ideal for life (partially stripped by slow rotation)

temperature15

Optimal temperature range for liquid water and life (large moon stabilizes the axial tilt - steady seasons) (runaway tidal heating keeps the surface molten regardless of orbit)

magnetic Field100

Magnetic field provides radiation protection (a large close moon may help stir the core dynamo (speculative))

Physical Properties

Mass

1.50x Earth (8.96e+24 kg)

Radius

1.14x Earth (7293 km)

Surface Gravity

1.14x Earth (11.2 m/s²)

Surface Temperature

279 K (6 °C / 43 °F)

Rotation Period

10.0 hours/day (faster than Earth)

Orbital Environment

Star Type

G-type (Yellow (Sun-like))

Distance from Star

0.99 AU (148101892 million km)

Atmosphere

Volcanic outgassing - sulfur compounds and vaporized rock

Elemental Composition

Fe - Iron

26.7%

Si - Silicon

26.7%

Mg - Magnesium

20.0%

Surface Characteristics

Runaway tidal heating keeps the surface molten - volcanic activity everywhere

Moons

Moon 1receding1.2% - 3.7 radii

Outside the synchronous orbit: slowly receding, like Luna (~cm per year).

Tidal braking locked the planet to its moon: one face forever moonward.

+5 temperature: large moon stabilizes the axial tilt - steady seasons-85 temperature: runaway tidal heating keeps the surface molten regardless of orbit+5 magneticField: a large close moon may help stir the core dynamo (speculative)