Why is this a Earth Like?Your planet has a balanced composition with all CHNOPS elements, proper mass (4.4x Earth), and sits in the habitable zone at 25.00 AU.
Earth-like planets have the perfect combination of composition, temperature, mass, and magnetic field to potentially support complex life as we know it.
Classification Criteria:
✓ All CHNOPS elements present (C, H, N, O, P, S)✓ Mass: 4.4x Earth (0.5-2.0x range)✓ Temperature: 252K (250-320K range)✓ Magnetic field present✓ Distance: 25.00 AU (habitable zone)
Habitability ScoreHabitable
66
Contributing Factors
water74
Good water content - mostly frozen
geology90
Active geology recycles nutrients and drives carbon cycle
rotation65
Slow rotation - significant day/night temperature variations, but life can adapt
Organic Chemistry100
All CHNOPS elements present - building blocks of life (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere100
Nitrogen-oxygen atmosphere - breathable and protective
temperature70
Challenging but potentially habitable temperature
magnetic Field100
Magnetic field provides radiation protection — but the black hole's accretion disk bathes this orbit in hard X-ray radiation
Physical Properties
Mass
4.40x Earth (2.63e+25 kg)
Radius
1.64x Earth (10,440 km)
Surface Gravity
1.64x Earth (16.1 m/s²)
Surface Temperature
252 K (-21 °C / -6 °F)
Rotation Period
34.0 hours/day (slower than Earth)
Orbital Environment
Star Type
BH-type (Black Hole)
Distance from Star
25.00 AU (3.74 billion km)
Orbital Period
39.5 years
Atmosphere
Nitrogen-oxygen atmosphere with trace CO₂, water vapor, and argon
Elemental Composition
O - Oxygen
25.0%
Si - Silicon
22.9%
Fe - Iron
16.7%
Surface Characteristics
Rocky surface with continents, oceans, and active plate tectonics. Diverse biomes if life present.
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2017 via transit · 49 light-years awaySource: NASA Exoplanet Archive
Inside the Roche limit (2.80 planet radii): torn apart into a ring system.
Moon 2rings0.010% - 4.3 radii
Inside the synchronous orbit: it spiraled inward and was torn apart at the Roche limit (Phobos's fate).
Moon 3rings0.010% - 7.5 radii
Inside the synchronous orbit: it spiraled inward and was torn apart at the Roche limit (Phobos's fate).
Moon 4stable0.010% - 11.3 radii
Small and distant: a quiet, stable companion.
Moon 5stable0.010% - 17.2 radii
Small and distant: a quiet, stable companion.
+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry
Habitability
✓ Conditions suitable for life detectedThis planet exhibits the necessary conditions to support biological processes, including stable temperatures, liquid water, and protective magnetic fields.