# c. Write the three laws given by Kepler. How did they help Newton to arrive at the inverse square law of gravity?

c. Write the three laws given by Kepler. How did they help Newton to arrive at the inverse square law of gravity?

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### Kepler's first law:

The orbit of a planet is an ellipse with the Sun at one of the foci.

### Kepler's Second law:

The line joining the planet and the Sun sweeps equal areas in equal intervals of time

### Kepler's Third law :

The square of its period of revolution around the Sun is directly proportional to the cube of the mean distance of a planet from the Sun.