Description: Chthonian
Surface: Barren, extremely hot
Atmosphere: Barren, extremely hot
Age: 2-10 billion years
Equator diameter: 1,000-10,000 km
Life: none
Surface: Barren, extremely hot
Atmosphere: Barren, extremely hot
Age: 2-10 billion years
Equator diameter: 1,000-10,000 km
Life: none
Class X is the result of the failed transformation of a class T planet into a star. Instead, the gas giant will not become a red dwarf, but a class X planet free of its hydrogen and helium atmospheres. The result is a small barren world, similar to Class B planets, but without an atmosphere and with a very dense metal core.