The solar system's highest peak can be found on the asteroid ... equivalent of sea level - Olympus Mons is the biggest mountain on Mars. It was first discovered in 1971 by the NASA Mariner 9 ...

but it's nothing compared to the tallest volcanic mountain in the solar system, Olympus Mons on our red cousin Mars. John Brady at Astronomy Central shows, in the image below, what this gargantuan ...