Answer:

Kepler's law

Explanation:

1.kepler's 1st law : The orbit is eclipses with sun at one of the foci

2.Kepler's 2nd law: The line joining the planet and sun sweeps equal area in equal interval of time

3.kepler's 3rd law : The square of it's period of revolution around the sun and it directly proportional to the mean of

cube of distance of planet from the sun

Hope it help you