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Entering orbit…
Habitability
0/ 100
Uninhabitable

Melted Gargantua

by Stargazer
0

Lava World

Magnetic FieldExtreme Activity
Why is this a Lava World?Your planet's proximity to its star (0.10 AU) results in extreme surface temperatures of 3932K.
Lava worlds orbit so close to their stars that rocky surfaces melt into oceans of molten rock. Recent planet formation can also create temporary lava worlds.
Classification Criteria:
✓ Temperature: 3932K (>1000K)
Habitability ScoreUninhabitable
0
Contributing Factors
water50
Water present but likely as steam
geology40
Extreme volcanic activity may be hazardous
rotation100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere10
No atmosphere - exposed to radiation and temperature extremes
temperature0
Inferno world - temperatures exceed all possibility of life
magnetic Field100
Magnetic field provides radiation protection

Physical Properties

Mass
1.20x Earth (7.17e+24 kg)
Radius
1.06x Earth (6,770 km)
This planet: 1.06× Earth radiusEarth: 1× (baseline)
Surface Gravity
1.06x Earth (10.4 m/s²)
Surface Temperature
3,932 K (3,658 °C / 6,617 °F)
Rotation Period
20.0 hours/day (faster than Earth)
This planet: 20 h/dayEarth: 24 h/day

Orbital Environment

Star Type
BH-type (Black Hole)
Distance from Star
0.10 AU (15 million km)
Orbital Period
4 days
Time Dilation
Clocks run 46.7 seconds per year slower than deep space — about 1.0 hours over a lifetime

Atmosphere

Minimal - too hot to retain

Elemental Composition

O - Oxygen
41.2%
H - Hydrogen
17.6%
N - Nitrogen
11.8%

Surface Characteristics

Molten surface with lava flows, volcanic activity everywhere

Closest Real Exoplanet

K2-381 b79% similar
Orbiting K2-381
YoursK2-381 b
Mass1.20 × Earth1.26 × Earth
Radius1.05 × Earth1.07 × Earth
Density (composition)5.69 g/cm³5.67 g/cm³
Temperature3,932 K—
Starlight received40,000 × Earth—
Star temperature— 4,473 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2022 via transit · 476 light-years awaySource: NASA Exoplanet Archive
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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