What Planet Has The Largest Mountain?

There is no definitive answer to this question as it depends on how you measure mountains. For example, if you take the height of the mountain above the surrounding terrain, then Mars has the tallest mountain in the solar system with Olympus Mons reaching a height of around 22km. However, if you take into account the size of the base of the mountain, then Saturn’s moon Titan has a much larger mountain called Hotei Arcus which is almost 50km high.

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