What are the mountain ranges on the Moon?

black and white, oblique view of southern Montes Caucasus, facing north

Early researchers and observers of the Moon assumed that the large flat plains on the lunar surface were seas because they did not know that water was absent on the Moon’s dry, airless surface. They named them “maria,” the Latin for “seas,” singular “mare” pronounced as “mah-ray,” not knowing that a totally … Read more