What is believed to be the origin of the moons of Mars?
A)They formed when a body the size of the Earth impacted with Mars early in its history.
B)They are escaped moons of Saturn.
C)They formed from material ejected from Olympus Mons and other large volcanoes on Mars.
D)They are captured asteroids.

Question

Quizplus · Accepted Answer

The most widely accepted theory is that Phobos and Deimos, the moons of Mars, are captured asteroids. This is supported by their irregular shape and composition, which is consistent with that of asteroids. Additionally, their orbits are very close to Mars, which would be difficult to explain if they had formed from material ejected from the planet's surface.

What Is Believed to Be the Origin of the Moons