No life — too cold for liquid water Low Activity
Why is this a Rocky Terrestrial? Your planet is dominated by silicate (32.0%) and iron (15.0%) 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.
✓ Silicon: 32.0% + Iron: 15.0% + Magnesium: 10.0% ✓ Mass: 0.4x Earth (terrestrial range)
Habitability Score Uninhabitable
Contributing Factors water 14
Very dry - minimal water - mostly frozen geology 60
Some geological activity provides slow nutrient cycling rotation 100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution Organic Chemistry 50
Carbon and hydrogen present - organic chemistry possible atmosphere 50
CO₂ atmosphere with moderate greenhouse effect temperature 40
Extreme temperature - very difficult for life magnetic Field 30
No magnetic field - vulnerable to solar radiation — but the black hole's accretion disk bathes this orbit in hard X-ray radiation Physical Properties Mass
0.40x Earth (2.39e+24 kg) Radius
0.74x Earth (4,694 km) This planet: 0.74× Earth radius Earth: 1× (baseline)
Surface Gravity
0.74x Earth (7.2 m/s²) Surface Temperature
239 K (-34 °C / -29 °F) Rotation Period
29.0 hours/day (slower than Earth) This planet: 29 h/day Earth: 24 h/day Orbital Environment Star Type
BH-type (Black Hole) Distance from Star
27.00 AU (4.04 billion km) Atmosphere Thin, dusty CO₂ atmosphere
Surface Characteristics Rocky surface with impact craters, possible volcanic features Closest Real Exoplanet Orbiting TRAPPIST-1 Yours TRAPPIST-1 e Mass 0.40 × Earth 0.69 × Earth Radius 0.79 × Earth 0.92 × Earth Density (composition) 4.45 g/cm³ 4.90 g/cm³ Temperature 239.3 K 250.0 K Starlight received 0.55 × Earth 0.65 × Earth Star temperature — 2,566 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole. Discovered 2017 via transit · 40 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets