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
37/ 100
Extremely Harsh

Aranyani

by Metamorphohedron1111
0

Ice World

✦ Auru'Mareth
Magnetic FieldNone Activity
Why is this a Ice World?Your planet orbits at 0.45 AU from its star, resulting in frigid temperatures of 185K.
Ice worlds form beyond the frost line where temperatures are low enough for water and other volatiles to freeze solid. They may have subsurface oceans beneath thick ice shells.
Classification Criteria:
✓ Distance: 0.45 AU (>3 AU) or Temperature <200K✓ Temperature: 185K✓ Water content: 61.9% for ice formation
Habitability ScoreExtremely Harsh
37
Contributing Factors
water47
Water present but mostly frozen (low gravity lets water escape to space)
geology30
Geologically dead - no nutrient recycling
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry20
Limited organic chemistry potential
atmosphere28
Nitrogen atmosphere provides protection but not breathable (partially stripped by slow rotation)
temperature25
Very cold - water frozen, challenging 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
0.50x Earth (2.99e+24 kg)
Radius
0.79x Earth (5,057 km)
This planet: 0.79× Earth radiusEarth: 1× (baseline)
Surface Gravity
0.79x Earth (7.8 m/s²)
Surface Temperature
185 K (-88 °C / -126 °F)
Rotation Period
18.0 hours/day (faster than Earth)
This planet: 18 h/dayEarth: 24 h/day

Orbital Environment

Star Type
M-type (Red Dwarf)
Distance from Star
0.45 AU (67.3 million km)
Orbital Period
201 days

Atmosphere

Thin nitrogen and methane atmosphere

Elemental Composition

O - Oxygen
49.2%
H - Hydrogen
25.4%
Si - Silicon
25.4%

Surface Characteristics

Frozen surface covered in water ice, possible subsurface ocean if tidal heating present

Closest Real Exoplanet

TRAPPIST-1 h83% similar
Orbiting TRAPPIST-1
YoursTRAPPIST-1 h
Mass0.50 × Earth0.33 × Earth
Radius0.97 × Earth0.76 × Earth
Density (composition)3.00 g/cm³4.17 g/cm³
Temperature185.4 K172.0 K
Starlight received0.20 × Earth0.14 × Earth
Star temperature3,050 K2,566 K
Discovered 2017 via transit · 40 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1receding10% - 29.0 radii

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

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

+5 temperature: large moon stabilizes the axial tilt - steady seasons+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.

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