Question

what is meant my rotation of planets

Answer 1

Rotation is when a planet or moon turns all the way around or spins on its axis one time. The axis of rotation is an imaginary line going from the north pole to the south pole. When a planet or moon travels once around an object this is considered a revolution.

Answer 2

The moon and Earth both revolve and rotate on their way around in our solar system, but what is the difference between the two movements?

Rotation is when a planet or moon turns all the way around or spins on its axis one time. The axis of rotation is an imaginary line going from the north pole to the south pole. When a planet or moon travels once around an object this is considered a revolution. On Earth, a rotation is pretty short - it happens once a day! It is the rotation that makes the sun appear to come up in the morning and set at night. On Earth, a revolution is quite a bit longer - one year!

The moon is a little different. The moon rotates once about every 27 days, and revolves once about every 27 days. So every time the moon goes around Earth it turns around one time. That is why the moon always looks the same - we only ever see one side of it! Another strange thing is that if we lived on the Moon and thought of days and years the same way we do on Earth, a day AND a year would be the same length! Since the rotation and revolution times are the same, the length of a day and the length of a year are identical.

hope this may help you