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Bjarne
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What is the cause of the planets (and the Suns) rotation
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The rotation of the planets is caused by their initial angular momentum. When the planets first formed, they were made up of materials that were already in motion. As these materials came together to form the planets, their collective motion caused the planets to rotate.
Yes, the Sun's gravitational pull does play a role in the rotation of the planets. The Sun's gravity creates a tidal force on the planets, causing them to slightly bulge and creating a torque that can alter their rotation.
The direction of a planet's rotation is determined by the direction of its initial angular momentum. In some cases, collisions or gravitational interactions with other objects can alter a planet's rotation, causing it to rotate in the opposite direction.
No, the speed of a planet's rotation varies depending on its size, composition, and distance from the Sun. For example, smaller planets tend to rotate faster than larger planets, and planets closer to the Sun rotate faster than those farther away.
Yes, the rotation of a planet can change over time due to various factors such as gravitational interactions with other objects, tidal forces, and impacts from asteroids or comets. However, these changes are usually very gradual and can take millions of years to have a noticeable effect.