It was discovered in the 19th century by observers, but was not named until 1972, when its true size, about that of the state of Arizona, was discovered.
It was discovered in the 19th century by observers, but was not named until 1972, when its true size, about that of the state of Arizona, was discovered. Due to this immense size and shallow slope, the peak of this feature would be visible from the planet's surface, and thus can only be viewed properly from space. For ten points, name this martian shield volcano, which, at about three time the height of Mount Everest, is the tallest mountain in our solar system.
It was discovered in the 19th century by observers, but was not named until 1972, when its true size, about that of the state of Arizona, was discovered.
{Olympus Mons}