Rotation
The spinning motion of a planet on its axis.
Axis
An imaginary line that passes through the center of a planet.
Revolution
The movement of an object around another object.
Orbit
The path of an object as it revolves around another object in space.
Solctise
Ther of the 2 days of the year which the sun reaches its greatest distance north or south of the equator.
Equinox
Either of the 2 days of the year on which neither hemisphere is tilted towards or away from the sun.