Mars

Mars is the fourth planet from the Sun. Named after the Roman god of war, the planet is often described as the "Red Planet" because of its reddish appearance.

Mars is a terrestrial planet with a thin atmosphere and surface features such as impact craters, volcanoes, valleys, deserts, and polar ice caps.

Trivia

 * Mars has the Olympus Mons, the second tallest known mountain within the Solar System (three times as tall as Mount Everest), and Valles Marineris, one of the largest canyons.