The highest mountain in the Solar SystemOlympus (Latin Olympus Mons) - an extinct volcano on Mars, the highest mountain in the solar system. Before the flight spacecraft (which showed that Olympus - mountain) this place was known to astronomers as Nix Olympica.The height of Mount Olympus - 27 km to the base, and 25 km to the average level of the surface of Mars. This is several times higher than the highest mountains on Earth. Olympus extends for 540 km in width, and has steep slopes on the edges of up to 7 km. Causes of these giant cliffs have not yet found a convincing explanation.