Skyrocket Your Success with CAP Mitchell Aerospace Practice Test 2026 – Soar to New Heights!

Phobos and Deimos are indeed the names of Mars's moons. These two small moons were discovered in 1877 by American astronomer Asaph Hall and are named after the Greek mythological figures who accompanied the god of war, Ares, representing fear and terror. Phobos is the larger and closer of the two moons, orbiting Mars in just over 7 hours, while Deimos is smaller and orbits at a greater distance, taking about 30.3 hours to complete one orbit.

The other choices reference moons that belong to different planets. For example, Earth and Luna is a mix-up since Luna is the name for Earth's moon, not a moon of Mars. Io and Europa are moons of Jupiter, and Ganymede and Callisto are also moons of Jupiter. This context helps to clarify why Phobos and Deimos are specifically recognized as the moons of Mars.