Habitability

0/ 100

Uninhabitable

Ash Twin And Ember twin

by Starbuilder123

Lava World

Extreme 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: 0.54 AU, 379K equilibrium

Habitability ScoreUninhabitable

Contributing Factors

water0

No water - the recipe has no hydrogen and oxygen to form it

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)

temperature0

Extreme temperature - very difficult for life (large moon stabilizes the axial tilt - steady seasons) (runaway tidal heating keeps the surface molten regardless of orbit)

magnetic Field35

No magnetic field - vulnerable to solar radiation (a large close moon may help stir the core dynamo (speculative))

Physical Properties

Mass

0.30x Earth (1.79e+24 kg)

Radius

0.67x Earth (4,265 km)

Surface Gravity

0.67x Earth (6.6 m/s²)

Surface Temperature

379 K (106 °C / 222 °F)

Rotation Period

25.0 hours/day (slower than Earth)

Orbital Environment

Star Type

G-type (Yellow (Sun-like))

Distance from Star

0.54 AU (80.8 million km)

Atmosphere

Volcanic outgassing - sulfur compounds and vaporized rock

Elemental Composition

Si - Silicon

34.2%

O - Oxygen

20.5%

Fe - Iron

20.5%

Surface Characteristics

Runaway tidal heating keeps the surface molten - volcanic activity everywhere

Closest Real Exoplanet

Barnard c85% similar

Orbiting Barnard's star

	Yours	Barnard c
Mass	0.30 × Earth	0.34 × Earth
Radius	0.67 × Earth	0.74 × Earth
Temperature	378.8 K	400.0 K
Starlight received	3.43 × Earth	4.73 × Earth
Star temperature	5,600 K	3,195 K

Discovered 2025 via radial velocity · 6 light-years awaySource: NASA Exoplanet Archive

Moons

Moon 1receding10% - 7.4 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)