Sign in or create your account

Enter your email and we'll send a 6-digit code — no password needed.
We only keep your email and the username you choose. We never share or sell your email, and we don't send marketing — we use it only to email you a sign-in code. Learn more.
Entering orbit…
Habitability
27/ 100
Extremely Harsh

Calleus

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: 8.0x EarthTemperature: 234K
Habitability ScoreExtremely Harsh
27
Contributing Factors
water15
No solid surface — any water is locked in a supercritical mantle and hot ice, not oceans
geology60
Some geological activity provides slow nutrient cycling
rotation100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution
Organic Chemistry20
Limited organic chemistry potential
atmosphere30
Hydrogen-rich atmosphere typical of gas giants
temperature40
Extreme temperature - very difficult for life
magnetic Field100
Magnetic field provides radiation protection — but the remnant's shock fronts flood this orbit with cosmic rays

Physical Properties

Mass
8.00x Earth (4.78e+25 kg)
Radius
2.00x Earth (12,742 km)
This planet: 2.00× Earth radiusEarth: 1× (baseline)
Surface Gravity
2.00x Earth (19.6 m/s²)
Surface Temperature
234 K (-39 °C / -39 °F)
Rotation Period
24.0 hours/day
This planet: 24 h/dayEarth: 24 h/day

Orbital Environment

Star Type
SNR-type (Supernova Remnant)
Distance from Star
1.00 AU (150 million km)
Orbital Period
309 days

Atmosphere

Deep hydrogen-helium envelope with photochemical haze

Elemental Composition

He - Helium
58.1%
H - Hydrogen
34.9%
Fe - Iron
7.0%

Surface Characteristics

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

Closest Real Exoplanet

Kepler-1086 c93% similar
Orbiting Kepler-1086
YoursKepler-1086 c
Mass8.00 × Earth8.96 × Earth
Radius3.02 × Earth2.94 × Earth
Density (composition)1.60 g/cm³1.94 g/cm³
Temperature233.8 K211.0 K
Starlight received0.50 × Earth0.52 × Earth
Star temperature— 4,350 K
Discovered 2016 via transit · 1,520 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1rings10% - 1.8 radii

Inside the Roche limit (1.92 planet radii): torn apart into a ring system.

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.

Sign in or create your account

Enter your email and we'll send a 6-digit code — no password needed.
We only keep your email and the username you choose. We never share or sell your email, and we don't send marketing — we use it only to email you a sign-in code. Learn more.

Send feedback

We're still building out the best experience we can — and we'd love your input. Tell us about features you enjoy, ideas you'd like to see, or pain points where something feels off, and we'll know where to look next.

Type