Moon Orbiting Laser Sees Ice in Deep Crater? | Video

Nearly 22% of the floor and walls of Shackelton Crater at the Moon's South Pole could be ice. Illuminated by a laser on NASA's Lunar Reconnaissance Orbiter (LRO) researchers measured the brightness of the area, gauging the amount of ice.
credit : NASA/Zuber, M.T. et al., Nature, 2012 / Mash Mix: