Carbon World Magnetic Field Moderate Activity
Why is this a Carbon World? Your planet's carbon (39.2%) outweighs its oxygen (13.7%), 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: 39.2% (>=20% required) ✓ Carbon exceeds Oxygen: 39.2% > 13.7% ✓ Mass: 1.0x Earth (<=8x hycean ceiling)
Habitability Score Extremely Harsh
Contributing Factors water 43
Abundant water - boiling away, little would be retained 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 15
Extremely hot - hostile to known life forms magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
1.00x Earth (5.97e+24 kg) Radius
1.00x Earth (6,371 km) This planet: 1.00× Earth radius Earth: 1× (baseline)
Surface Gravity
1.00x Earth (9.8 m/s²) Surface Temperature
525 K (252 °C / 485 °F) Rotation Period
24.0 hours/day This planet: 24 h/day Earth: 24 h/day Orbital Environment Distance from Star
0.64 AU (95.7 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 Closest Real Exoplanet Orbiting Teegarden's Star Yours Teegarden's Star b Mass 1.00 × Earth 1.16 × Earth Radius 1.12 × Earth 1.05 × Earth Density (composition) 3.90 g/cm³ 5.52 g/cm³ Temperature 525.1 K 277.0 K Starlight received 0.98 × Earth 1.08 × Earth Star temperature 4,450 K 3,034 K
Discovered 2019 via radial velocity · 12 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets