One.
That is the definition of a rotation. Once around it's axis.
See related question for the periods
The period of rotation for each of the planets is as follows - the sidereal rotation (rotation time against background stars); PlanetSidereal rotational periodMercury58.646225Venus-243.0187Earth0.99726957Mars1.02595675Jupiter0.41007Saturn0.426Uranus-0.71833Neptune0.67125
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.
A planets rotation is dependent on the total number and direction of ALL the hits that it has taken since it initially formed.
The force that keeps all of our planets in rotation is gravity.
The planets Venus, Uranus and Pluto rotate in retrograde rotation. Hope that helped ~ :-))
its rotation is opposite of all the other planets.
its rotation is opposite of all the other planets.
They have an attraction toward each other but they stay still due to there heavy mass and there speed of high rotation
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rotation
rotation
outer planets.