TUCSON, Arizona, Sept. 20 (TNSres) -- The University of Arizona issued the following news release: * * * In 1996, the University of Arizona Spacewatch program discovered Didymos, the larger of the two asteroids that are the focus of NASA's upcoming DART mission encounter. * * * On a spring night in 1996, a camera on the University of Arizona Steward Observatory's 36-inch telescope atop Kitt Peak captured three important images of a bright object sweeping across a backdrop of seemingly static  more