Why is this a Lava World?A moon inside the synchronous orbit spiraled in and struck the planet. The impact remelted the surface into a global magma ocean.
Tidal decay drags close-in moons down over millions of years. A large enough impactor liquefies the crust, strips atmosphere, and resets the surface - whatever the orbit's temperature would otherwise allow.
Classification Criteria:
✓ Moon inside the synchronous orbit (tidal decay)✓ Impactor massive enough to remelt the crust- Orbit itself was fine: 8.59 AU, 242K equilibrium
Habitability ScoreUninhabitable
0
Contributing Factors
water50
Limited water content
geology50
Extreme volcanic activity may be hazardous (impact-resurfaced crust)
rotation100
Optimal rotation period - balanced day/night cycle, moderate weather, and good heat distribution
Organic Chemistry80
Core organic elements (CHNO) present
atmosphere58
Nitrogen atmosphere provides protection but not breathable (atmosphere partially stripped by the moon impact)
temperature0
Extreme temperature - very difficult for life (surface remelted by the moon impact - molten regardless of orbit)
magnetic Field100
Magnetic field provides radiation protection
Physical Properties
Mass
1.00x Earth (5.97e+24 kg)
Radius
1.00x Earth (6,371 km)
Surface Gravity
1.00x Earth (9.8 m/s²)
Surface Temperature
242 K (-31 °C / -24 °F)
Rotation Period
24.0 hours/day
Orbital Environment
Star Type
A-type (Blue-White)
Distance from Star
8.59 AU (1.29 billion km)
Orbital Period
17.8 years
Atmosphere
Thin nitrogen and methane atmosphere
Elemental Composition
O - Oxygen
31.3%
Si - Silicon
25.0%
N - Nitrogen
12.5%
Surface Characteristics
Surface remelted by a catastrophic moon impact - a global magma ocean cooling into scarred rock
Inside the synchronous orbit: tidal decay dragged it down - it struck the planet ages ago.
-12 atmosphere: atmosphere partially stripped by the moon impact+10 geology: impact-resurfaced crust-85 temperature: surface remelted by the moon impact - molten regardless of orbit