The Pluto-Charon system moves in which way in its mutual motion?
A) Charon orbits Pluto with exactly Pluto's rotation period.
B) Charon orbits Pluto once while Pluto rotates twice.
C) There is no relationship between rotation period of Pluto and orbital period of Charon.
D) Charon orbits Pluto twice while Pluto rotates once.

Question

Quizplus · Accepted Answer

Charon orbits Pluto with exactly the same rotation period as Pluto, meaning they are tidally locked to each other. This results in the same side of Pluto and Charon always facing each other.

The Pluto-Charon System Moves in Which Way in Its Mutual