Login / Sign-up NOW to ask your Doubts - its totally FREE !!
Because the force is gravitational force which follows inverse square law. For example – If distance becomes double the force decreases by 4 times.
lighter planets keep falling towards the heavier sun but due to its total energy, it does not hit but goes past and around the sun. An elliptical orbit is only possible in this case.
There are other planets and asteroids also present. It is not only the sun. Also for circle, your velocity should satisfy equation F=mv^2/r. If this is not satisfied then it will be an elliptical path not a circle.