Question

What force is responsible:

1). The earth revolves around the sun.

2). The moon revolves around the earth.

Answer 1

The earth revolving around the sun:

1. The celestial gravity provides the necessary centripetal force to keep all the celestial objects moving in their respective orbit.
2. So, the centripetal force generated due to celestial gravity is responsible for the Earth revolving around the Sun.
3. This is Newton's universal law of gravitation that holds the whole universe together in their respective places.
4. So, Gravitational force is the force due to which all the planets revolve around the Sun.
5. This force of attraction exists between any two bodies in the universe that have some mass.

The moon revolving around the earth:

1. It is the equilibrium between centrifugal force caused by the rotation of the moon and the earth's gravitational force.
2. The gravitational force between the moon and earth ensures that the moon is in its orbit.