Carbon World Magnetic Field High Activity
Why is this a Carbon World? Your planet's carbon (30.3%) outweighs its oxygen (16.9%), so the mineralogy flips from silicate rock to carbide - a graphite crust over a diamond mantle. Carbon worlds form in carbon-rich disks where there isn't enough oxygen to bind it all into silicates. Instead carbon condenses directly into graphite, carbides, and - under pressure at depth - diamond. They form water-poor, so no life takes hold.
✓ Carbon: 30.3% (>=20% required) ✓ Carbon exceeds Oxygen: 30.3% > 16.9% ✓ Mass: 3.5x Earth (<=8x hycean ceiling)
Habitability Score Extremely Harsh
Contributing Factors water 50
Limited water content geology 90
Active geology recycles nutrients and drives carbon cycle rotation 10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only Organic Chemistry 100
All CHNOPS elements present - building blocks of life atmosphere 16
Atmosphere present but composition not ideal for life (partially stripped by slow rotation) temperature 20
Extremely hot - hostile to known life forms (large moon stabilizes the axial tilt - steady seasons) magnetic Field 100
Magnetic field provides radiation protection (a large close moon may help stir the core dynamo (speculative)) Physical Properties Mass
3.50x Earth (2.09e+25 kg) Radius
1.52x Earth (9,673 km) This planet: 1.52× Earth radius Earth: 1× (baseline)
Surface Gravity
1.52x Earth (14.9 m/s²) Surface Temperature
467 K (193 °C / 380 °F) Rotation Period
16.0 hours/day (faster than Earth) This planet: 16 h/day Earth: 24 h/day Orbital Environment Distance from Star
0.65 AU (97.2 million km) Atmosphere Carbon monoxide and methane haze over a graphite surface
Surface Characteristics Graphite plains and carbide ridges over a diamond mantle - a glittering coal-black world Moons
Moon 1 rings 1.0% - 1.9 radii
Inside the Roche limit (2.80 planet radii): torn apart into a ring system.
Moon 2 receding 1.1% - 12.3 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 +5 magneticField: a large close moon may help stir the core dynamo (speculative)