The original version of Kepler's third law, P² = a³, applies to each of these orbits EXCEPT A) Mercury. B) Jupiter. C) the Moon. D) Comet Halley.

Question

Quizplus · Accepted Answer

Kepler's third law originally applies to planets orbiting the Sun, stating that the square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit. The Moon, however, orbits Earth, not the Sun, making it the exception.

The Original Version of Kepler's Third Law, P2 = A3

The Original Version of Kepler's Third Law, P² = A³