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Entering orbit…
Habitability
12/ 100
Uninhabitable

Mercury

0

Rocky Terrestrial

None Activity
Why is this a Rocky Terrestrial?Your planet is dominated by silicate (53.3%) and iron (40.0%) content, forming a rocky terrestrial body.
Rocky terrestrial planets are primarily composed of silicate rocks and metals. They're the most common type of small planet in the universe.
Classification Criteria:
✓ Silicon: 53.3% + Iron: 40.0% + Magnesium: 4.0%✓ Mass: 0.2x Earth (terrestrial range)
Habitability ScoreUninhabitable
12
Contributing Factors
water0
No water - the recipe has no hydrogen and oxygen to form it
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
atmosphere4
No atmosphere - exposed to radiation and temperature extremes (partially stripped by slow rotation)
temperature15
Extremely hot - hostile to known life forms
magnetic Field30
No magnetic field - vulnerable to solar radiation

Physical Properties

Mass
0.20x Earth (1.19e+24 kg)
Radius
0.58x Earth (3,726 km)
This planet: 0.58× Earth radiusEarth: 1× (baseline)
Surface Gravity
0.58x Earth (5.7 m/s²)
Surface Temperature
445 K (172 °C / 342 °F)
Rotation Period
1,526.0 hours/day (slower than Earth)
This planet: 1526 h/dayEarth: 24 h/day

Orbital Environment

Star Type
G-type (Yellow (Sun-like))
Distance from Star
0.39 AU (58.3 million km)
Orbital Period
89 days

Atmosphere

Minimal or none

Elemental Composition

Si - Silicon
53.3%
Fe - Iron
40.0%
Mg - Magnesium
4.0%

Surface Characteristics

Rocky surface with impact craters, possible volcanic features

Closest Real Exoplanet

Kepler-378 c89% similar
Orbiting Kepler-378
YoursKepler-378 c
Mass0.20 × Earth0.27 × Earth
Radius0.66 × Earth0.70 × Earth
Density (composition)3.90 g/cm³4.35 g/cm³
Temperature445.2 K414.0 K
Starlight received6.57 × Earth8.17 × Earth
Star temperature5,600 K4,661 K
Discovered 2014 via transit · 496 light-years awaySource: NASA Exoplanet Archive
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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