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News: Secrets of ocean birth laid bare 
http://news.bbc.co.uk/1/hi/sci/tech/5191384.stm#graphic
 
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'Significant' water found on Moon

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Lisa Wolfe
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« on: November 14, 2009, 02:21:09 am »

No doubt

October's experiment involved driving a 2,200kg Centaur rocket stage into the 100km-wide Cabeus Crater, a permanently shadowed depression at the Moon's far south.

At the time, scientists were hoping for a big plume of debris some 10km high which could be seen by Earth telescopes.



 
The following probe was designed to analyse the debris plume
The actual debris cloud was much smaller, about 1.6km high, but sufficiently large to betray the evidence researchers were seeking.

The near-infrared spectrometer on the LCROSS probe that followed the rocket into the crater detected water-ice and water vapour. The ultraviolet-visible spectrometer provided additional confirmation by identifying the hydroxyl (OH) molecule, which arises when water is broken apart in sunlight.

"We were able to match the spectra from LCROSS data only when we inserted the spectra for water," Dr Colaprete said.

"No other reasonable combination of other compounds that we tried matched the observations. The possibility of contamination from the Centaur also was ruled out."

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