The world's largest telescope is edging closer to completion EngadgetMIRROR LAB | Preparing for Casting GMT's Mirror 6 The University of ArizonaScientists are casting one of the largest telescope mirrors ever made on Earth Yahoo NewsUArizona making mirrors for breakthrough telescope KGUNEngineering marvel: Sixth mirror cast for Giant Magellan Telescope Phys.orgView Full Coverage on Google News