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Water and hydroxyl in fresh lunar crater ejecta

Water and hydroxyl in fresh lunar crater ejecta
Water and hydroxyl in fresh lunar crater ejecta These images show a recent crater on the lunar farside as seen by the Moon Mineralogy Mapper on Chandrayaan-1. The left image represents albedo. The right image shows the strength of two absorption features, one at 2.8 microns due to the presence of hydroxyl (OH-) and one longer-wavelength one due to the presence of water (H2O). Hydroxyl is enriched in two rays emanating from the 1 o'clock and 7 o'clock positions around the fresh crater, indicating that hydroxyl-rich material was excavated from below the surface when the crater formed. ISRO / NASA / JPL-Caltech / USGS / Brown University