Large quantities of water ice were discovered near the surface of the south lunar pole by the US Department of Defence's satellite "Clementine" in 1996. At a press conference at the Jet Propulsion Laboratory on March 5 it was announced that data from
NASA's Lunar Prospector satellite launched in January has confirmed that discovery and indicates the presence of many millions of tons of ice, and possibly as much as a billion tons, at both lunar poles.