An imaginary line which passes through the poles of the planet.
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rotation
rotation
All planets turn on their axis. This is called the planet's rotation; one complete rotation is equal to one day on that planet.
It is called rotation.
Unlike their orbits around the sun - which was inherent in the way the planets were formed - their rotation speeds and axis of rotation is random and is dependent on each planet's history of collisions.
The dominant mode of rotation of planets, where they rotate counterclockwise on their axis as viewed from above the North Pole, is called prograde rotation.
Orbit around another body, rotation around its axis.
rotation-planets on axis revolution-planets in orbit
Rotation around the planets central axis.
One complete turn of a planet's axis is known as a "single rotation." This rotation typically takes one day to complete on Earth, causing the cycle of day and night.
rotation (as opposed to orbiting, which describes the earth's movements around the sun)