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Entering orbit…
Habitability
40/ 100
Marginal

Urnula

by Anatra007
0

Gas Giant

✦ Rubiclear
Magnetic FieldExtreme Activity
Why is this a Gas Giant?Your planet has 18.4% hydrogen and helium, combined with a mass of 9534.0x Earth, which exceeds the gas giant threshold.
Gas giants form when massive cores capture enormous atmospheres of light gases. They typically form beyond the 'frost line' where volatiles can condense.
Classification Criteria:
✓ Hydrogen + Helium: 18.4% (>60% required)✓ Mass: 9534.0x Earth (>10x required)
Habitability ScoreMarginal
40
Contributing Factors
water15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans
geology50
Extreme volcanic activity may be hazardous (tidal flexing sustains geologic activity)
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry100
All CHNOPS elements present - building blocks of life
atmosphere12
Hydrogen-rich atmosphere typical of gas giants (partially stripped by slow rotation)
temperature45
Extreme temperature - very difficult for life (large moon stabilizes the axial tilt - steady seasons)
magnetic Field100
Magnetic field provides radiation protection (a large close moon may help stir the core dynamo (speculative))

Physical Properties

Mass
9534.00x Earth (5.69e+28 kg)
Radius
21.20x Earth (135,093 km)
This planet: 21.20× Earth radiusEarth: 1× (baseline)
Surface Gravity
21.20x Earth (208.0 m/s²)
Surface Temperature
249 K (-24 °C / -12 °F)
Rotation Period
13.0 hours/day (faster than Earth)
This planet: 13 h/dayEarth: 24 h/day

Orbital Environment

Star Type
B-type (Blue Giant)
Distance from Star
124.90 AU (18.7 billion km)
Orbital Period
441.4 years

Atmosphere

Hydrogen and helium dominated with trace methane and ammonia

Elemental Composition

U - Uranium
15.6%
H - Hydrogen
12.8%
O - Oxygen
12.0%

Surface Characteristics

No solid surface - thick gaseous envelope with possible rocky core deep within

Closest Real Exoplanet

BEBOP-4 AB b58% similar
Orbiting BEBOP-4 A
YoursBEBOP-4 AB b
Mass9,534 × Earth8,360 × Earth
Radius34.3 × Earth—
Density (composition)1.30 g/cm³—
Temperature248.8 K239.0 K
Starlight received0.64 × Earth0.55 × Earth
Star temperature20,000 K5,701 K
Discovered 2025 via radial velocity · 763 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1recedingOcean world1.1% - 11.5 radii

Outside the synchronous orbit: slowly receding, like Luna (~cm per year).

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

A thin tidal-warmed subsurface ocean may exist, but conditions are marginal (14/100).

Moon 2receding0.10% - 42.3 radii

Outside the synchronous orbit: slowly receding, like Luna (~cm per year).

Moon 3stable0.011% - 100.0 radii

Small and distant: a quiet, stable companion.

+5 temperature: large moon stabilizes the axial tilt - steady seasons+10 geology: tidal flexing sustains geologic activity+5 magneticField: a large close moon may help stir the core dynamo (speculative)
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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