Rocky Terrestrial Life Detected Moderate Activity
Why is this a Rocky Terrestrial? Your planet is dominated by silicate (25.7%) and iron (15.5%) 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: 25.7% + Iron: 15.5% + Magnesium: 1.9% ✓ Mass: 0.2x Earth (terrestrial range)
Habitability Score Extremely Harsh
Contributing Factors water 20
Very dry - minimal water geology 90
Active geology recycles nutrients and drives carbon cycle rotation 30
Very slow rotation - extreme temperature swings between eternal day and night sides Organic Chemistry 100
All CHNOPS elements present - building blocks of life (tidal pools cycle wet and dry - a boost for prebiotic chemistry) atmosphere 70
Nitrogen atmosphere provides protection but not breathable temperature 100
Optimal temperature range for liquid water and 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
0.20x Earth (1.19e+24 kg) Radius
0.58x Earth (3,726 km) This planet: 0.58× Earth radius Earth: 1× (baseline)
Surface Gravity
0.58x Earth (5.7 m/s²) Surface Temperature
280 K (7 °C / 45 °F) Rotation Period
50.0 hours/day (slower than Earth) This planet: 50 h/day Earth: 24 h/day Orbital Environment Star Type
BH-type (Black Hole) Distance from Star
19.70 AU (2.95 billion km) Atmosphere Thin, dusty CO₂ and nitrogen atmosphere
Surface Characteristics Rocky surface with impact craters, possible volcanic features Closest Real Exoplanet Orbiting Proxima Cen Yours Proxima Cen d Mass 0.20 × Earth 0.26 × Earth Radius 0.66 × Earth 0.69 × Earth Density (composition) 3.90 g/cm³ 4.32 g/cm³ Temperature 280.1 K 282.0 K Starlight received 1.03 × Earth 1.81 × Earth Star temperature — 2,900 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole. Discovered 2025 via radial velocity · 4 light-years away Source: NASA Exoplanet Archive Browse all 5,568 real exoplanets Learn more about exoplanets Moons
Moon 1 receding 10% - 100.0 radii
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry
Habitability ✓ Conditions suitable for life detected This planet exhibits the necessary conditions to support biological processes, including stable temperatures, liquid water, and protective magnetic fields.