Timelapse for casting GMT mirror 5. Credit: Richard F. Caris Mirror Lab, The University of Arizona and Giant Magellan Telescope – GMTO Corporation

The Giant Magellan Telescope’s primary mirrors are fabricated with high-purity, low-expansion, borosilicate glass (called E6 glass) from the Ohara Corporation of Japan.

Sixth Mirror Cast for Giant Magellan Telescope

Underneath the stands of the Arizona Wildcats Football Stadium, engineers of UArizona's Richard F. Caris Mirror Lab manufacture the world's largest and most lightweight telescope mirrors. At the center of the process is a giant spinning furnace, the only one of its kind.

High Fire Casting of the Sixth Primary Mirror for the Giant Magellan Telescope has begun!

Lowering the simulator onto the test cell, June 2020. Image credit: Steven West | Richard F. Caris Mirror Lab at the University of Arizona

Anonymous Gift Means More Time on GMT for UArizona Astronomers | Photo credit: GMTO

Giant Magellan Telescope: Once operational in 2028, the telescope will sit in the Chilean desert (Image: Giant Magellan Telescope)

Check out this image from February of the mirror cell during the installation of the support actuator mount posts.