It is the movement that a celestial body makes around its own axis.
Its speed determines, on a planet, the duration of the rotation period, that is, of the day. A high rotation speed involves, especially in the celestial caves of low average density, a marked flattening at the poles and a widening in the equator due to centrifugal forces.
The rotations of the planets of the solar system are carried out, with the exception of Venus, counterclockwise.
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