Why is this a Carbon World?Your planet's carbon (28.6%) outweighs its oxygen (4.8%), 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.
Active geology recycles nutrients and drives carbon cycle
rotation100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution
Organic Chemistry50
Carbon and hydrogen present - organic chemistry possible — but the ground itself is radioactive, and no magnetic field shields a world from its own crust
atmosphere40
Atmosphere present but composition not ideal for life
temperature40
Extreme temperature - very difficult for life
magnetic Field100
Magnetic field provides radiation protection
Physical Properties
Mass
1.00x Earth (5.97e+24 kg)
Radius
1.00x Earth (6,371 km)
Surface Gravity
1.00x Earth (9.8 m/s²)
Surface Temperature
376 K (103 °C / 218 °F)
Rotation Period
24.0 hours/day
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
1.00 AU (150 million km)
Orbital Period
1.00 years
Atmosphere
Carbon monoxide and methane haze over a graphite surface
Elemental Composition
C - Carbon
28.6%
Fe - Iron
19.0%
U - Uranium
14.3%
Surface Characteristics
Graphite plains and carbide ridges over a diamond mantle - a glittering coal-black world