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.
