21. Which of Kepler's laws states that the square of the orbital period of a planet is directly proportional to the cube of its average distance from the sun?

(1 point)
Responses

Kepler's First Law
Kepler's First Law

Kepler's Second Law
Kepler's Second Law

Kepler's Third Law
Kepler's Third Law

None of the above

1 answer

The law that states that the square of the orbital period of a planet is directly proportional to the cube of its average distance from the sun is Kepler's Third Law.