What do astronomers generally believe about the origin of Mars's moons
A)They formed with the planet out of the protoplanetary material.
B)They formed elsewhere and were captured at a later time.
C)They were ejected from Mars during its formation.
D)They were once a single moon and a later catastrophic event broke them in two.

Question

Quizplus · Accepted Answer

Astronomers generally believe that Mars's moons, Phobos and Deimos, were formed elsewhere in the solar system and were later captured by Mars's gravity. This theory is supported by the moons' irregular shapes and composition, which suggest that they were not formed from the same material as Mars itself.

What Do Astronomers Generally Believe About the Origin of Mars's