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Entering orbit…
Habitability
40/ 100
Marginal

sectula parsect B

by appleeater
0

Gas Dwarf

Magnetic FieldLow Activity
Why is this a Gas Dwarf?Your planet has an unusual composition that doesn't fit standard classifications, or lacks the elements needed for complex geological processes.
Barren worlds can form from uncommon element combinations or may be remnants of larger bodies that lost their atmospheres and volatile materials.
Classification Criteria:
Composition doesn't match standard planet typesMass: 3.8x EarthTemperature: 238K
Habitability ScoreMarginal
40
Contributing Factors
water15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans
geology70
Some geological activity provides slow nutrient cycling (tidal flexing sustains geologic activity)
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry80
Core organic elements (CHNO) present
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

Physical Properties

Mass
3.80x Earth (2.27e+25 kg)
Radius
1.56x Earth (9,942 km)
This planet: 1.56× Earth radiusEarth: 1× (baseline)
Surface Gravity
1.56x Earth (15.3 m/s²)
Surface Temperature
238 K (-35 °C / -31 °F)
Rotation Period
24.0 hours/day
This planet: 24 h/dayEarth: 24 h/day

Orbital Environment

Star Type
G-type (Yellow (Sun-like))
Distance from Star
1.36 AU (203 million km)
Orbital Period
1.59 years

Atmosphere

Deep hydrogen-helium envelope with photochemical haze

Elemental Composition

H - Hydrogen
55.0%
He - Helium
32.0%
O - Oxygen
5.0%

Surface Characteristics

No solid surface - a thick gas envelope wrapped around a small deep core (a mini-Neptune)

Closest Real Exoplanet

Kepler-174 d83% similar
Orbiting Kepler-174
YoursKepler-174 d
Mass3.80 × Earth5.43 × Earth
Radius2.36 × Earth2.19 × Earth
Density (composition)1.60 g/cm³2.85 g/cm³
Temperature238.4 K212.0 K
Starlight received0.54 × Earth0.53 × Earth
Star temperature5,600 K4,880 K
Discovered 2014 via transit · 1,256 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1stable0.0056% - 27.2 radii

Small and distant: a quiet, stable companion.

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

Moon 2receding0.50% - 10.1 radii

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

+5 temperature: large moon stabilizes the axial tilt - steady seasons+10 geology: tidal flexing sustains geologic activity
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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