20 Tons of Glass, Fresh from the Oven

UA News December 2013 | Giant Magellan Telescope’s Third Mirror Unveiled at the UA Steward Observatory Mirror Lab.  The Giant Magellan Telescope’s third primary mirror was unveiled at the University of Arizona’s Steward Observatory Mirror Lab on Friday, with UA President Ann Weaver Hart cutting the ribbon separating a 25-foot glass dish from an applauding crowd of invited guests and journalists.  more>