But the moon’s wild volcanic activity wasn’t detected ... Io orbits around Jupiter, the largest planet in our solar system, ...

A scary thought when you consider the volcano's colossal size. Olympus Mons is the largest planetary mountain in the solar system, but there's a mountain on the asteroid, Vesta, that is the ...

When Iain mentioned that Mauna Loa in Hawaii was the second largest volcano in the Solar System, lots of you asked what the largest was. The answer is Olympus Mons on Mars. Yes. The hill of ...