Why is this a Earth Like?Your planet has a balanced composition with all CHNOPS elements, proper mass (4.8x Earth), and sits in the habitable zone at 23.20 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: 4.8x Earth (0.5-2.0x range)✓ Temperature: 262K (250-320K range)✓ Magnetic field present✓ Distance: 23.20 AU (habitable zone)
Habitability ScoreMarginal
53
Contributing Factors
water82
Good water content - mostly frozen
geology90
Active geology recycles nutrients and drives carbon cycle
rotation30
Very slow rotation - severe temperature swings between eternal day and night sides
Organic Chemistry100
All CHNOPS elements present - building blocks of life (tidal pools cycle wet and dry - a boost for prebiotic chemistry)
atmosphere60
Nitrogen-oxygen atmosphere - breathable and protective (partially stripped by slow rotation)
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
4.80x Earth (2.87e+25 kg)
Radius
1.69x Earth (10,747 km)
Surface Gravity
1.69x Earth (16.5 m/s²)
Surface Temperature
262 K (-11 °C / 12 °F)
Rotation Period
13.0 hours/day (faster than Earth)
Orbital Environment
Star Type
BH-type (Black Hole)
Distance from Star
23.20 AU (3.47 billion km)
Orbital Period
35.3 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 3stable0.010% - 7.5 radii
Small and distant: a quiet, stable companion.
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.
Moon 6merged0.010% - 26.2 radii
Merged with an adjacent moon: too close for both to hold a stable orbit.
Moon 7stable0.010% - 39.9 radii
Small and distant: a quiet, stable companion.
Moon 8stable0.010% - 23.1 radii
Small and distant: a quiet, stable companion.
Moon 9rings0.010% - 1.7 radii
Inside the Roche limit (2.80 planet radii): torn apart into a ring system.
Moon 10stable0.010% - 60.7 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.