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: 0.74 AU, 1400K equilibrium
Habitability ScoreUninhabitable
0
Contributing Factors
water0
No water - the recipe has no hydrogen and oxygen to form it
geology50
Extreme volcanic activity may be hazardous (impact-resurfaced crust)
rotation10
Near tidally locked - one hemisphere perpetually scorched, other frozen, narrow habitable twilight zone only
Organic Chemistry20
Limited organic chemistry potential
atmosphere0
Atmosphere present but composition not ideal for life (partially stripped by slow rotation) (atmosphere partially stripped by the moon impact)
temperature5
Inferno world - temperatures exceed all possibility of life (large moon stabilizes the axial tilt - steady seasons)
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
1,400 K (1,127 °C / 2,060 °F)
Rotation Period
24.0 hours/day
Orbital Environment
Star Type
G-type (Yellow (Sun-like))
Distance from Star
0.74 AU (111 million km)
Orbital Period
233 days
Atmosphere
Vaporized rock and impact ash - the original atmosphere blown off by the strike
Elemental Composition
Ni - Nickel
40.0%
Ti - Titanium
40.0%
Al - Aluminum
20.0%
Surface Characteristics
Surface remelted by a catastrophic moon impact - a global magma ocean cooling into scarred rock
Outside the synchronous orbit: slowly receding, like Luna (~cm per year).
Tidal braking locked the planet to its moon: one face forever moonward.
Moon 2crashed10% - 3.7 radii
Inside the synchronous orbit: tidal decay dragged it down - it struck the planet ages ago.
+5 temperature: large moon stabilizes the axial tilt - steady seasons+4 chemistry: tidal pools cycle wet and dry - a boost for prebiotic chemistry-36 atmosphere: atmosphere partially stripped by the moon impact+10 geology: impact-resurfaced crust