According to Kepler’s third law, the square of the period of any planet is proportional to
1- the cube of the planets diameter
2- the square of the planets period of rotation
3- the planets mean distance from the Earth
4- the cube of the planets mean distance from the sun
4- the cube of the planet's mean distance from the sun.
According to Kepler's third law, the square of the period of any planet is proportional to the cube of the planet's mean distance from the sun. Therefore, the correct answer is:
4- the cube of the planet's mean distance from the sun.