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Water on the Moon: Where, What, Why, and How Much!

Wednesday, June 3, 2015
Darby
Dyar (Mt. Holyoke College)

Abstract: The initial excitement about the discovery of "water" on the Moon has devolved into widespread misunderstanding of exactly what was discovered and how it should be interpreted.  In this talk, I review the evidence for hydrogen signatures on the lunar surface and how they are associated with different rock types. The nine ways H can be stored in minerals and glasses are used to compare and evaluate evidence for exogenic (cometary vs. solar wind) origins for lunar H versus endogenic processes. Finally, the issues surrounding quantification of H on the lunar surface will be presented as a work-in-progress, hinging on  fundamental research relating the shape of the 2.8-3 micron OH/H2O feature in lunar spectra to composition, mineralogy, and optical constants. 

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