“There is a lot more water on the moon than previously believed, according to an analysis of NASA data being published Friday, a finding that may bolster the case for a manned base on the lunar surface.
The discovery grew out of an audacious experiment last year, when the National Aeronautics and Space Administration slammed a spent-fuel rocket into a lunar crater at 5,600 miles an hour, and then used a pair of orbiting satellites to analyze the debris thrown off by the impact. They discovered that the crater contained water in the form of ice, plus a host of other resources, including hydrogen, ammonia, methane, mercury, sodium and silver.
NASA announced its groundbreaking discovery of lunar water last November. Now, a more detailed analysis of the data—the subject of six research papers being published in the journal Science—concludes that there is a lot more water on the moon than anyone expected, about twice the concentrations seen in the Sahara Desert.
“It’s really wet,” said Anthony Colaprete, co-author of one of the Science papers and a space scientist at NASA Ames Research Center at Moffett Field, Calif. He and his colleagues estimate that 5.6% of the total mass of the targeted lunar crater’s soil consists of water ice. In other words, 2,200 pounds of moon dirt would yield a dozen gallons of water.
The presence of water doesn’t make it more likely that there ever was life on the moon, as the location studied is among the coldest in the solar system. But the large quantity boosts the case for a manned lunar base from which to launch other interplanetary adventures. Water is crucial because its components, hydrogen and oxygen, are key ingredients for rocket fuel. Oxygen can also be extracted from water to make breathable air.
Finding a water source on the moon has long been a dream, because it could save on the expense of transporting it from earth. A bottle of water on the moon would run about $50,000, according to NASA, because that is what it costs, per pound, to launch anything to earth’s nearest neighbor.”
Read more at The Wall Street Journal
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