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Entering orbit…
Habitability
15/ 100
Uninhabitable

Urlum

by Metamorphohedron1111
0

Ice Giant

✦ Kerbol
Magnetic FieldModerate Activity
Why is this a Ice Giant?Your planet has moderate mass (17.0x Earth) with significant water, carbon, and nitrogen content, characteristic of ice giants.
Ice giants like Uranus and Neptune have icy interiors with thick atmospheres of hydrogen and helium, but not enough to be classified as gas giants.
Classification Criteria:
✓ Mass: 17.0x Earth (5-20x range)✓ Water/Carbon/Nitrogen rich composition
Habitability ScoreUninhabitable
15
Contributing Factors
water15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans
geology90
Active geology recycles nutrients and drives carbon cycle
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry84
Core organic elements (CHNO) present (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere12
Hydrogen-rich atmosphere typical of gas giants (partially stripped by slow rotation)
temperature10
Frozen world - minimal potential for complex life
magnetic Field100
Magnetic field provides radiation protection

Physical Properties

Mass
17.00x Earth (1.02e+26 kg)
Radius
2.57x Earth (16,382 km)
This planet: 2.57× Earth radiusEarth: 1× (baseline)
Surface Gravity
2.57x Earth (25.2 m/s²)
Surface Temperature
78 K (-195 °C / -319 °F)
Rotation Period
16.0 hours/day (faster than Earth)
This planet: 16 h/dayEarth: 24 h/day

Orbital Environment

Star Type
G-type (Yellow (Sun-like))
Distance from Star
22.90 AU (3.43 billion km)
Orbital Period
109.6 years

Atmosphere

Hydrogen and helium with water, methane, and ammonia ices

Elemental Composition

H - Hydrogen
28.3%
He - Helium
22.1%
O - Oxygen
15.0%

Surface Characteristics

Icy mantle surrounding rocky core, with hydrogen-helium atmosphere

Closest Real Exoplanet

HD 95735 c87% similar
Orbiting GJ 411
YoursHD 95735 c
Mass17.0 × Earth13.6 × Earth
Radius3.88 × Earth3.76 × Earth
Density (composition)1.60 g/cm³1.41 g/cm³
Temperature78.2 K63.0 K
Starlight received0.00 × Earth0.00 × Earth
Star temperature5,600 K3,719 K
Discovered 2021 via radial velocity · 19 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1stable0.0011% - 5.4 radii

Small and distant: a quiet, stable companion.

Tidal braking locked the planet to its moon: one face forever moonward.

Moon 2merged0.0045% - 5.9 radii

Merged with an adjacent moon: too close for both to hold a stable orbit.

Moon 3stable0.0025% - 18.6 radii

Small and distant: a quiet, stable companion.

Moon 4rings0.010% - 1.8 radii

Inside the synchronous orbit: it spiraled inward and was torn apart at the Roche limit (Phobos's fate).

+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry
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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