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Entering orbit…
Habitability
0/ 100
Uninhabitable

1

by Vinny
0

Lava World

Extreme Activity
Why is this a Lava World?Your planet's proximity to its star (0.10 AU) results in extreme surface temperatures of 15633K.
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: 15633K (>1000K)
Habitability ScoreUninhabitable
0
Contributing Factors
water2
Very dry - minimal water (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 Chemistry80
Core organic elements (CHNO) present
atmosphere1
No atmosphere - exposed to radiation and temperature extremes (severely compromised by extreme rotation)
temperature0
Inferno world - temperatures exceed all possibility of life
magnetic Field30
No magnetic field - vulnerable to solar radiation

Physical Properties

Mass
0.10x Earth (5.97e+23 kg)
Radius
0.46x Earth (2,957 km)
This planet: 0.46× Earth radiusEarth: 1× (baseline)
Surface Gravity
0.46x Earth (4.6 m/s²)
Surface Temperature
15,633 K (15,360 °C / 27,680 °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
0.10 AU (15 million km)
Orbital Period
2 days
Time Dilation
Clocks run 2.3 minutes per year slower than deep space — about 3.1 hours over a lifetime

Atmosphere

Minimal - too hot to retain

Elemental Composition

C - Carbon
18.6%
Si - Silicon
15.0%
U - Uranium
12.1%

Surface Characteristics

Molten surface with lava flows, volcanic activity everywhere

Closest Real Exoplanet

Kepler-1489 c51% similar
Orbiting Kepler-1489
YoursKepler-1489 c
Mass0.10 × Earth0.09 × Earth
Radius0.54 × Earth0.51 × Earth
Density (composition)3.55 g/cm³3.61 g/cm³
Temperature15,633 K—
Starlight received10,000,000 × Earth—
Star temperature35,000 K5,566 K
Discovered 2024 via transit · 4,175 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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