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In the course of 71 days in lunar orbit, from 19 February to 3 May 1994, the Clementine spacecraft acquired just under 2,000,000 digital images of the Moon at visible and infrared wavelengths. These data are enabling the global mapping of the rock types of the lunar crust and the first detailed investigation of the geology of the lunar polar regions and the lunar farside. Clementine laser-ranging measurements provided the first view of the global topographic figure of the Moon. The topography of many ancient impact basins has been measured and a global map of the thickness of the lunar crust has been derived by M.Zuber and others from combined analysis of the topography and gravity.
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