The center of the planet is called the "core."
The center of a planet star and or moon is the core
The distance from surface to surface through the center of a planet would be that planet's "diameter".
Yes, the angular momentum about the center of the planet is conserved.
A big ball of gas and helium. Not if your planet is the Earth. Earth has iron at its center.
core
Planet Country was created on 2009-11-06.
Core
It's a planet!
An imaginary line that runs through the center of a planet and its poles is called its axis.Or possibly a diameter, in regards to the planet's dimensions.
France is not a planet, it's a country, and it's also not the biggest country.
The duration of Country Fried Planet is 1800.0 seconds.