The Colors of Pluto: Clues to its Geological Evolution and Surface/Atmospheric Interactions

John R Spencer1, Alan Stern2, Catherine Olkin1, William M Grundy3, Dale P Cruikshank4, Richard P Binzel5, Leslie Ann Young1, Kimberly Ennico Smith4, Harold A Weaver Jr6 and New Horizons Geology, Geophysics and Imaging, and Composition, Theme Teams, (1)Southwest Research Institute Boulder, Boulder, CO, United States, (2)Southwest Research Institute, Boulder, CO, United States, (3)Lowell Observatory, Flagstaff, AZ, United States, (4)NASA Ames Research Center, Moffett Field, CA, United States, (5)MIT Rm 54-410, Cambridge, United States, (6)Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States