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Which planet has the tallest known mountain?
Quick Answer
Mars has the tallest known mountain in the Solar System: Olympus Mons. It rises about 22 km above the surrounding plains.
The Full Story
Olympus Mons on Mars is the tallest volcano and mountain known in the Solar System. Its summit stands roughly 22 kilometers above the Martian plains, more than twice the height of Mount Everest above sea level on Earth. The volcano is also enormous in width, spanning about 600 kilometers across. Its size is possible because Mars has lower gravity and no active plate tectonics like Earth.
Key Facts
1.Height about 22 km
2.Width about 600 km
3.Largest volcano in the Solar System
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"The tallest mountain we know of is on Mars!"
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