Giant Magellan Telescope project casts 7th and final mirror (photos)
The Giant Magellan Telescope project just cast its seventh and final primary mirror segment, a huge milestone that keeps the scope on target to begin operations in the late 2020s.
TroibNews 
The Giant Magellan Telescope project just cast its seventh and final primary mirror segment, a huge milestone that keeps the scope on target to begin operations in the late 2020s.
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