Consider that the peak of Olympus Mons[1] on Mars is 26 km (16 mi) above the plain. It's unlikely that it's the tallest mountain in the universe, though, and a

Consider that the peak of Olympus Mons[1] on Mars is 26 km (16 mi) above the plain. It's unlikely that it's the tallest mountain in the universe, though, and a true pity that if the current understanding of physics is correct, and we can not travel faster than the speed of light, no human will ever experience those massive, distant mountains outside our solar system except in images or virtual reality. [1] - https://en.m.wikipedia.org/wiki/Olympus_Mons https://en.m.wikipedia.org/wiki/Olympus_Mons