Which of the following statements best describes Kepler's third law of planetary motion?
A)The smaller the diameter of a planet, the faster its rotational period.
B)The orbital period of a planet is directly proportional to the diameter of the planet.
C)The smaller the orbit, the longer its orbital period.
D)The larger the orbit, the longer its orbital period.

Question

Quizplus · Accepted Answer

Kepler's third law of planetary motion states that the square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit. This means that the larger the orbit (semi-major axis), the longer its orbital period.

Which of the Following Statements Best Describes Kepler's Third Law