What is the centripetal Force that keeps satellites such as the moon in orbit around the sun

When an object is in circular motion, the velocity of the object constantly changes (at least its direction): this means there is an acceleration acting on the object, and therefore there must be a force.

This force is called centripetal force, and it is always directed towards the centre of the circular trajectory.

The nature of this centripetal force depends on the situation: in fact, different forces can act as centripetal forces. For instance:

For a car moving along a turn on the road, the centripetal force is provided by the force of friction between the tires and the road itself
For a satellite moving around a planet, such as a moon, or for a planet moving around a star, the centripetal force is provided by the force of gravitational attraction between the two objects.

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