Magnetic Field Low Activity
Why is this a Carbon World? Your planet's carbon (100.0%) 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: 100.0% (>=20% required) ✓ Carbon exceeds Oxygen: 100.0% > 0.0% ✓ Mass: 0.6x Earth (<=8x hycean ceiling)
Habitability Score Uninhabitable
Contributing Factors water 0
No water - the recipe has no hydrogen and oxygen to form it geology 60
Some geological activity provides slow nutrient cycling rotation 100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution Organic Chemistry 20
Limited organic chemistry potential atmosphere 40
Atmosphere present but composition not ideal for life temperature 20
Very cold - water frozen, challenging for life magnetic Field 100
Magnetic field provides radiation protection Physical Properties Mass
0.60x Earth (3.58e+24 kg) Radius
0.84x Earth (5,374 km) This planet: 0.84× Earth radius Earth: 1× (baseline)
Surface Gravity
0.84x Earth (8.3 m/s²) Surface Temperature
158 K (-115 °C / -175 °F) Rotation Period
24.0 hours/day This planet: 24 h/day Earth: 24 h/day Orbital Environment Distance from Star
1.95 AU (292 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 d Mass 0.60 × Earth 0.82 × Earth Radius 0.98 × Earth 0.95 × Earth Density (composition) 3.54 g/cm³ 5.20 g/cm³ Temperature 158.3 K 159.0 K Starlight received 0.11 × Earth 0.12 × Earth Star temperature 4,450 K 3,034 K
Discovered 2024 via radial velocity · 12 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets