Habitability
8/ 100
Uninhabitable

BH Venus

by Stargazer
0
Magnetic FieldHigh Activity
Why is this a Venus Like?Your planet has a thick CO₂ atmosphere creating a runaway greenhouse effect, with surface temperatures of 569K.
Venus-like planets experience runaway greenhouse warming where CO₂ traps heat, evaporating oceans and creating hostile conditions despite being in the habitable zone.
Classification Criteria:
✓ Temperature: 569K (500-800K range)✓ CO₂-rich atmosphere creating greenhouse effect
Habitability ScoreUninhabitable
8
Contributing Factors
water50
Water present but likely as steam
geology90
Active geology recycles nutrients and drives carbon cycle
rotation65
Slow rotation - significant day/night temperature variations, but life can adapt
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere35
Dense CO₂ atmosphere with extreme greenhouse effect
temperature15
Extremely hot - hostile to known life forms
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
3.90x Earth (2.33e+25 kg)
Radius
1.57x Earth (10,028 km)
This planet: 1.57× Earth radiusEarth: 1× (baseline)
Surface Gravity
1.57x Earth (15.4 m/s²)
Surface Temperature
569 K (296 °C / 565 °F)
Rotation Period
66.0 hours/day (slower than Earth)
This planet: 66 h/dayEarth: 24 h/day

Orbital Environment

Star Type
BH-type (Black Hole)
Distance from Star
9.31 AU (1.39 billion km)

Atmosphere

Dense CO₂ atmosphere with sulfuric acid clouds, extreme greenhouse effect

Elemental Composition

O - Oxygen
25.0%
C - Carbon
14.2%
Fe - Iron
14.2%

Surface Characteristics

Rocky surface with volcanic plains, extreme pressure and heat

Closest Real Exoplanet

GJ 15 A b91% similar
Orbiting GJ 15 A
YoursGJ 15 A b
Mass3.90 × Earth3.03 × Earth
Radius1.57 × Earth1.55 × Earth
Temperature569.3 K550.0 K
Starlight received4.61 × Earth4.27 × Earth
Star temperature 3,607 K
Matched on physical properties only — no confirmed exoplanet orbits a black hole.Discovered 2014 via radial velocity · 12 light-years awaySource: NASA Exoplanet Archive
Moons
Moon 1rings0.32% - 2.0 radii

Inside the Roche limit (2.80 planet radii): torn apart into a ring system.