The world's largest telescope is edging closer to completion
The world's largest telescope is edging closer to completion This week, the University of Arizona's Steward Observatory Mirror Lab began work on the sixth of seven primary mirror segments for the Giant Magellan Telescope (GMT). On March 1st, the lab started heating its one-of-a-kind glass furnace to a temperature of 1,165 degrees Celsius. Continue Reading . . . https://www.engadget.com/gmt-mirror-spin-casting-201237230.html