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Moon wetter than Sahara Desert

Fri., Oct. 22, 2010

LOS ANGELES – The moon is much wetter and more chemically complicated than scientists had believed, according to data released Thursday by NASA.

Last year, after the space agency dropped a rocket into a frozen crater near the moon’s south pole and measured the stuff kicked up by the collision, scientists calculated that the crater contained about 25 gallons of water. But further analysis over the past 11 months indicates that the amount of water vapor and ice was closer to 41 gallons.

“It’s twice as wet as the Sahara Desert,” said Anthony Colaprete, the lead scientist for the Lunar Crater Observation and Sensing Satellite mission at NASA Ames Research Center in Northern California.

The instruments aboard the satellite, including near-infrared and visible light spectrometers, scanned the debris cloud and identified the compounds it contained. They determined that about 5.6 percent of the plume was made of water, give or take 2.9 percent. It also included a surprising variety of chemicals, including mercury, methane, silver, calcium, magnesium, pure hydrogen and carbon monoxide.

The findings were reported in six related papers published online Thursday by the journal Science.


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