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Entering orbit…
Habitability
12/ 100
Uninhabitable

Domeni

by Borianis12
0

Carbon World

✦ Aresidon System
Magnetic FieldExtreme 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.
Classification Criteria:
✓ Carbon: 52.3% (>=20% required)✓ Carbon exceeds Oxygen: 52.3% > 0.0%✓ Mass: 6.9x Earth (<=8x hycean ceiling)
Habitability ScoreUninhabitable
12
Contributing Factors
water0
No water - the recipe has no hydrogen and oxygen to form it (water stripped by extreme rotation)
geology40
Extreme volcanic activity may be hazardous
rotation0
Catastrophic rotation - centrifugal forces would destroy surface structures and prevent atmosphere retention
Organic Chemistry50
Carbon and hydrogen present - organic chemistry possible
atmosphere4
Atmosphere present but composition not ideal for life (severely compromised by extreme rotation)
temperature40
Extreme temperature - very difficult for life
magnetic Field100
Magnetic field provides radiation protection

Physical Properties

Mass
6.90x Earth (4.12e+25 kg)
Radius
1.90x Earth (12,129 km)
This planet: 1.90× Earth radiusEarth: 1× (baseline)
Surface Gravity
1.90x Earth (18.7 m/s²)
Surface Temperature
393 K (120 °C / 248 °F)
Rotation Period
1.0 hours/day (faster than Earth)
This planet: 1 h/dayEarth: 24 h/day

Orbital Environment

Star Type
O-type (Blue Supergiant)
Distance from Star
158.20 AU (23.7 billion km)
Orbital Period
363.3 years

Atmosphere

Carbon monoxide and methane haze over a graphite surface

Elemental Composition

C - Carbon
52.3%
Fe - Iron
17.4%
Si - Silicon
17.4%

Surface Characteristics

Graphite plains and carbide ridges over a diamond mantle - a glittering coal-black world

Closest Real Exoplanet

Kepler-311 d65% similar
Orbiting Kepler-311
YoursKepler-311 d
Mass6.90 × Earth4.86 × Earth
Radius1.89 × Earth2.05 × Earth
Density (composition)5.63 g/cm³3.11 g/cm³
Temperature393.0 K327.0 K
Starlight received4.00 × Earth2.71 × Earth
Star temperature35,000 K5,903 K
Discovered 2023 via transit · 2,541 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1stable0.010% - 23.5 radii

Small and distant: a quiet, stable companion.

Surface views from three worlds: rocky ground under a ringed sky, a cloud deck, and a lit desert

New: Stand on Your World 🏔️

Every planet you build can now be seen from the ground. The terrain, the color of the sky, the weather and what hangs overhead are all read from the same numbers that shape the globe — so a thin-aired world gives you sunlit rock under a near-black sky crowded with stars, a runaway greenhouse seals you under an unbroken sulfur lid, and a gas giant leaves you in the cloud tops with nothing solid beneath you at all. If one of your moons wandered inside the Roche limit, what is left of it arcs overhead as rings.

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