Carbon World Magnetic Field High Activity
Why is this a Carbon World? Your planet's carbon (24.0%) outweighs its oxygen (12.0%), 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: 24.0% (>=20% required) ✓ Carbon exceeds Oxygen: 24.0% > 12.0% ✓ Mass: 3.3x Earth (<=8x hycean ceiling)
Habitability Score Extremely Harsh
Contributing Factors water 72
Abundant water - likely as steam geology 90
Active geology recycles nutrients and drives carbon cycle rotation 30
Very slow rotation - extreme temperature swings between eternal day and night sides Organic Chemistry 84
Core organic elements (CHNO) present (tidal pools cycle wet and dry - a boost for prebiotic chemistry) atmosphere 24
Atmosphere present but composition not ideal for life (partially stripped by slow rotation) temperature 15
Extremely hot - hostile to known life forms magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
3.30x Earth (1.97e+25 kg) Radius
1.49x Earth (9,485 km) This planet: 1.49× Earth radius Earth: 1× (baseline)
Surface Gravity
1.49x Earth (14.6 m/s²) Surface Temperature
449 K (176 °C / 348 °F) Rotation Period
21.0 hours/day (faster than Earth) This planet: 21 h/day Earth: 24 h/day Orbital Environment Star Type
G-type (Yellow (Sun-like)) Distance from Star
1.36 AU (203 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 0.010% - 2.8 radii
Inside the Roche limit (2.80 planet radii): torn apart into a ring system.
Moon 2 rings 0.010% - 4.3 radii
Inside the synchronous orbit: it spiraled inward and was torn apart at the Roche limit (Phobos's fate).
Moon 3 stable 0.010% - 7.5 radii
Small and distant: a quiet, stable companion.
Moon 4 stable 0.010% - 11.3 radii
Small and distant: a quiet, stable companion.
Moon 5 stable 0.010% - 17.2 radii
Small and distant: a quiet, stable companion.
+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry