Rotation
The spinning motion of a planet on the axis.
Axis
An imaginary line that passes through a planets center and it’s north and south poles, about which the planet rotates.
Revolution
The movement of one object around another object
Orbit
The path of an object as it revolves around another object in space
Solstice
Either of the two days of the year on which the sun reaches its greatest distance north or south of the equator.
Equinox
Means equal night; this occurs halfway between solstices; it is the two days of the year in which neither hemisphere is tilted toward or away from the sun.