Olympus Mons(redirected from Mons Olympus)
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Related to Mons Olympus: Mount Olympus
A volcano, about 25 km (16 mi) high, on Mars. It is the highest known mountain in the solar system.
(Celestial Objects) the highest of the giant shield volcanoes on Mars, lying 18°N of the equator. Height: 26 km; base diameter: over 600 km