Valles Marineris on Mars

Mars - The Planets

mars

Mars is the fourth planet from the Sun in our solar system. It is named after Mars, the Roman god of war (Ares in Greek mythology). Its name was chosen because of its red color, a feature that also earned it the nickname "The Red Planet." Mars has two moons, Phobos and Deimos; both are small and oddly-shaped, and are possibly captured asteroids.