The ratio of the squares of the periods of any two planets revolving around the sun is equal to the ratio of the cubes of their average distance from the sun. Kepler’s Third Law: The ratio of the squa...The ratio of the squares of the periods of any two planets revolving around the sun is equal to the ratio of the cubes of their average distance from the sun. Kepler’s Third Law: The ratio of the squares of the periods of any two planets revolving around the sun is equal to the ratio of the cubes of their average distance from the sun. The average mean distance of the earth from the sun is 149.6 ×10 6 km and the period of the earth is 1.0 year.
