Which planet has the largest volcano in the solar system, Olympus Mons?

The largest volcano in the solar system, Olympus Mons, is located on Mars. This shield volcano stands about 13.6 miles (22 kilometers) high, which is almost three times the height of Mount Everest. The size of Olympus Mons is attributed to several factors, including the lack of tectonic plate movement on Mars, which allows magma to accumulate over time without being redistributed by geological activity. This leads to the formation of a massive structure rather than smaller, multiple volcanic forms typically found on Earth.

Mars also has a thinner atmosphere compared to Earth, which contributes to the preservation of such large features without significant erosion. Olympus Mons has a diameter of approximately 370 miles (600 kilometers), showcasing how the geological processes on Mars have created such a prominent feature in our solar system. This distinct characteristic of Olympus Mons makes Mars uniquely significant in discussions about planetary geology and volcanism.