Mars
Mars's Moons
![Mars moon montage](/sites/default/files/learn/mars_moon.jpg)
Credit: NASA/JPL-Caltech/GSFC/Univ. of Arizona
Mars has two moons called Phobos and Deimos. The planet Mars is named after the Roman god of war. As such the moons are called Phobos, which means 'fear' or 'panic', and Deimos, meaning 'terror' or 'dread'.
Mars
![](/sites/default/files/astro/mars_r.gif)
Credit:Almond/NASA
Mars is the fourth planet out from the Sun. It is also the second smallest planet in the Solar System after Mercury.