Oceanus Procellarum is a vast lunar plain on the western edge of the near side of the Moon. It is the only one of the lunar plains to be called an "Oceanus", due to its size: Oceanus Procellarum is th
Ancient rift valleys – rectangular structure (visible – topography – GRAIL gravity gradients) (October 1, 2014)
Ancient rift valleys – context
Ancient rift valleys – closeup (artist's concept)
Image of Apollo 12 landing site (center) used in mission planning (1.75 × 1.75 km)
The geology of the Moon is the structure and composition of the Moon, which is quite different from that of Earth. The Moon lacks a true atmosphere outside of a sparse layer of gas. Because of this, t
False-color image of the Moon taken by the Galileo orbiter showing geological features. NASA photo
The same image in true color.