Phobos
A) orbits Venus in a retrograde direction.
B) contains evidence of past volcanic activity on its surface.
C) always remains hidden behind Mars for observers on Earth.
D) has a very bright surface composed of frozen carbon dioxide.
E) orbits Mars faster than Mars rotates on its axis.

Question

Quizplus · Accepted Answer

Phobos orbits Mars faster than Mars rotates on its axis, completing an orbit in about 7.66 hours, which is less than a Martian day.