Is 39 miles as long as Olympus Mons?
It's about two-and-a-half times as tall as Olympus Mons
The height of Olympus Mons is about 17 miles.
(a.k.a. Mount Olympus) (Mars)
The tallest mountain in the solar system, Olympus Mons rises to approximately 17 miles. The mountain has been known to astronomers since the nineteenth century because it is tall enough to rise above Mars' frequent dust storms.
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