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Entering orbit…
Habitability
5/ 100
Uninhabitable

Marcus II

by Stargazer
0

Rocky Terrestrial

✦ Stargazer Nebula
Moderate Activity
Why is this a Rocky Terrestrial?Your planet is dominated by silicate (44.1%) and iron (14.7%) 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: 44.1% + Iron: 14.7% + Magnesium: 14.7%✓ Mass: 1.5x Earth (terrestrial range)
Habitability ScoreUninhabitable
5
Contributing Factors
water0
No water - the recipe has no hydrogen and oxygen to form it
geology90
Active geology recycles nutrients and drives carbon cycle
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)
temperature100
Optimal temperature range for liquid water and life
magnetic Field30
No magnetic field - vulnerable to solar radiation — but the remnant's shock fronts flood this orbit with cosmic rays

Physical Properties

Mass
1.50x Earth (8.96e+24 kg)
Radius
1.14x Earth (7,293 km)
This planet: 1.14× Earth radiusEarth: 1× (baseline)
Surface Gravity
1.14x Earth (11.2 m/s²)
Surface Temperature
302 K (29 °C / 84 °F)
Rotation Period
1,408.0 hours/day (slower than Earth)
This planet: 1408 h/dayEarth: 24 h/day

Orbital Environment

Star Type
SNR-type (Supernova Remnant)
Distance from Star
0.60 AU (89.8 million km)
Orbital Period
143 days

Atmosphere

Minimal or none

Elemental Composition

Si - Silicon
44.1%
Fe - Iron
14.7%
Mg - Magnesium
14.7%

Surface Characteristics

Rocky surface with impact craters, possible volcanic features

Closest Real Exoplanet

Kepler-438 b98% similar
Orbiting Kepler-438
YoursKepler-438 b
Mass1.50 × Earth1.46 × Earth
Radius1.13 × Earth1.12 × Earth
Density (composition)5.72 g/cm³5.73 g/cm³
Temperature301.8 K288.0 K
Starlight received1.39 × Earth1.40 × Earth
Star temperature— 3,748 K
Discovered 2015 via transit · 639 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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