One of the largest features on the Moon is the Ocean of Storms, a dark volcanic plain at left and upper left in this image of the full Moon. It's part of a larger basin that covers about 10 percent of the lunar surface. The Surveyor 3 spacecraft landed in the Ocean of Storms in 1967, and astronauts guided Apollo 12 to a precise touchdown next to the robotic craft in November 1969. [NASA]