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Habitability
17/ 100
Uninhabitable

EPIC 56765899-77695+22133

0

Rocky Terrestrial

None Activity
Why is this a Rocky Terrestrial?Your planet is dominated by silicate (33.3%) and iron (33.3%) content, forming a rocky terrestrial body. Its hydrogen and oxygen stock collects as scattered seas across the rocky crust.
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: 33.3% + Iron: 33.3% + Magnesium: 0.0%✓ Mass: 0.2x Earth (terrestrial range)
Habitability ScoreUninhabitable
17
Contributing Factors
water45
Abundant liquid water at surface temperature (low gravity lets water escape to space)
geology30
Geologically dead - no nutrient recycling
rotation100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution
Organic Chemistry20
Limited organic chemistry potential
atmosphere40
Atmosphere present but composition not ideal for life
temperature100
Optimal temperature range for liquid water and life
magnetic Field30
No magnetic field - vulnerable to solar radiation — but the pulsar's beams bathe this orbit in hard X-rays

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
278 K (5 °C / 41 °F)
Rotation Period
25.0 hours/day (slower than Earth)
This planet: 25 h/dayEarth: 24 h/day

Orbital Environment

Star Type
NS-type (Neutron Star)
Distance from Star
0.10 AU (15 million km)
Orbital Period
10 days
Time Dilation
Clocks run 6.5 seconds per year slower than deep space — about 9 minutes over a lifetime

Atmosphere

Thin trace-gas atmosphere

Elemental Composition

Fe - Iron
33.3%
Si - Silicon
33.3%
H - Hydrogen
16.7%

Surface Characteristics

Rocky surface with impact craters, possible volcanic features

Closest Real Exoplanet

Proxima Cen d84% similar
Orbiting Proxima Cen
YoursProxima Cen d
Mass0.20 × Earth0.26 × Earth
Radius0.66 × Earth0.69 × Earth
Density (composition)3.90 g/cm³4.32 g/cm³
Temperature278.0 K282.0 K
Starlight received1.00 × Earth1.81 × Earth
Star temperature— 2,900 K
Matched on physical properties only — but pulsar planets are real: the first exoplanets ever confirmed (PSR B1257+12, 1992) orbit a neutron star.Discovered 2025 via radial velocity · 4 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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