One consequence of the combination of rapid orbital motion and synchronous rotation of Phobos as it orbits Mars is that:
A)its orbital plane is slowly moving toward a polar orbit around Mars.
B)it is slowly spiraling into the planet.
C)it is slowly spiraling outward from the planet.
D)one side of the moon never receives sunlight.

Question

Quizplus · Accepted Answer

Phobos is slowly spiraling into Mars due to tidal forces. Its rapid orbital motion and synchronous rotation lead to tidal deceleration, causing it to lose altitude and gradually spiral toward Mars.

One Consequence of the Combination of Rapid Orbital Motion and Synchronous