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20-ton Mirror Cast in Rotating Fire May One Day Help Unlock Mysteries of the Universe
The third in a series of seven 20-ton mirrors that will one day comprise the Giant Magellan Telescope (GMT) was cast inside a rotating furnace at the University of Arizona's Steward Observatory Mirror Lab (SOML) on Saturday, marking another milestone in the construction of a telescope that, once complete, will be capable of capturing images 10 times sharper than the Hubble Space Telescope.
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