Which of these planets has the most moons? A - Mars
B - Venus
C - Mercury
D - Earth
Answer: A - Mars Of all the planets in our solar system, neither Mercury nor Venus have any moons at all, Earth has one moon, and Mars has two small moons. Usually the term moon brings to mind a spherical object, like Earth's Moon, however the two moons orbiting Mars (Phobos and Deimos), are dark and lumpy like two burnt potatoes. The examination of Phobos and Deimos revealed more than their odd, non-spherical shapes. The two moons are dark gray in color, and heavily cratered. The moons are some of the darkest, least reflective objects in the solar system.