Olympus Mons (Latin, "Mount Olympus") is the tallest known volcano and mountain in our solar system. It is located on the planet Mars at approximately . Before space probes confirmed its identity as a mountain, Olympus Mons was known to astronomers as the albedo feature, Nix Olympica ("Snows of Olympus"); since the late 19th century, however, it had been suspected that it was mountainous.