Mars has the biggest mountain in the solar system. People have always wondered about life on Mars because of the “”canals”” first seen by early astronomers. Mars is named after the Roman god of war because its red color reminded early observers of blood. Compared to the other planets in the solar system, Mars is quite small. In the 1970s, the Viking orbiter took pictures of what appear to be giant faces and pyramids carved into Mar’s surface in the Cydonia region. Mars has some of the wildest weather in the solar system.