Carbon World Magnetic Field Moderate Activity
Why is this a Carbon World? Your planet's carbon (52.3%) outweighs its oxygen (0.0%), 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: 52.3% (>=20% required) ✓ Carbon exceeds Oxygen: 52.3% > 0.0% ✓ Mass: 1.8x Earth (<=8x hycean ceiling)
Habitability Score Uninhabitable
Contributing Factors water 0
No water - the recipe has no hydrogen and oxygen to form it geology 90
Active geology recycles nutrients and drives carbon cycle rotation 100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution Organic Chemistry 50
Carbon and hydrogen present - organic chemistry possible atmosphere 40
Atmosphere present but composition not ideal for life temperature 70
Challenging but potentially habitable temperature magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
1.80x Earth (1.07e+25 kg) Radius
1.22x Earth (7,750 km) This planet: 1.22× Earth radius Earth: 1× (baseline)
Surface Gravity
1.22x Earth (11.9 m/s²) Surface Temperature
311 K (38 °C / 100 °F) Rotation Period
20.0 hours/day (faster than Earth) This planet: 20 h/day Earth: 24 h/day Orbital Environment Star Type
G-type (Yellow (Sun-like)) Distance from Star
0.80 AU (120 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.