NASA SPACECRAFT OBSERVES MOVEMENT OF WATER MOLECULES ON MOON

NASA's Lunar Reconnaissance Orbiter (LRO) spacecraft has observed water molecules moving around the dayside of the Moon, a finding that may prove beneficial as the agency plans to put astronauts back on the lunar surface.

Lyman Alpha Mapping Project (LAMP) -- the instrument aboard LRO -- measured sparse layer of molecules temporarily stuck to the Moon's surface, which helped characterise lunar hydration changes over the course of a day, revealed the paper published in Geophysical Research Letters.

"The study is an important step in advancing the water story on the Moon and is a result of years of accumulated data from the LRO mission," said John Keller, LRO deputy project scientist from NASA's Goddard Space Flight Centre in Maryland.

Until the last decade, scientists thought that the Moon was arid, with any water existing mainly as pockets of ice in permanently shaded craters near the poles.

More recently, they identified surface water in sparse populations of molecules bound to the lunar soil, or regolith.