planets and stars are revolving around their fixed orbits how ?

1.	planets and stars are revolving around their fixed orbits how ?
Answer» Centripetal force is the force which is applied from inside like b/w sun & planets & Centrifugual force is force which is applied from outside<br>Because of centripetal & centrifugual force which keep the planet & stars in the system<br>I think because of centre petal force<br>Because of the action of electrostatic force

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