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      Character and spatial distribution of OH/H2O on the surface of the Moon seen by M3 on Chandrayaan-1.

      Science (New York, N.Y.)
      Extraterrestrial Environment, Hydroxyl Radical, Minerals, Moon, Spacecraft, Spectrum Analysis, Sunlight, Temperature, Water

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          Abstract

          The search for water on the surface of the anhydrous Moon had remained an unfulfilled quest for 40 years. However, the Moon Mineralogy Mapper (M3) on Chandrayaan-1 has recently detected absorption features near 2.8 to 3.0 micrometers on the surface of the Moon. For silicate bodies, such features are typically attributed to hydroxyl- and/or water-bearing materials. On the Moon, the feature is seen as a widely distributed absorption that appears strongest at cooler high latitudes and at several fresh feldspathic craters. The general lack of correlation of this feature in sunlit M3 data with neutron spectrometer hydrogen abundance data suggests that the formation and retention of hydroxyl and water are ongoing surficial processes. Hydroxyl/water production processes may feed polar cold traps and make the lunar regolith a candidate source of volatiles for human exploration.

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          Most cited references17

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          Space weathering on airless bodies: Resolving a mystery with lunar samples

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            Temporal and Spatial Variability of Lunar Hydration As Observed by the Deep Impact Spacecraft

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              Fluxes of fast and epithermal neutrons from Lunar Prospector: evidence for water ice at the lunar poles.

              Maps of epithermal- and fast-neutron fluxes measured by Lunar Prospector were used to search for deposits enriched in hydrogen at both lunar poles. Depressions in epithermal fluxes were observed close to permanently shaded areas at both poles. The peak depression at the North Pole is 4.6 percent below the average epithermal flux intensity at lower latitudes, and that at the South Pole is 3.0 percent below the low-latitude average. No measurable depression in fast neutrons is seen at either pole. These data are consistent with deposits of hydrogen in the form of water ice that are covered by as much as 40 centimeters of desiccated regolith within permanently shaded craters near both poles.
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                Author and article information

                Journal
                19779151
                10.1126/science.1178658

                Chemistry
                Extraterrestrial Environment,Hydroxyl Radical,Minerals,Moon,Spacecraft,Spectrum Analysis,Sunlight,Temperature,Water

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