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SPIE: Casting Giants

Spun-cast telescope mirrors continue to shape astronomy’s future

Mirror Lab staff member Linda Warren places the last piece of glass into the mold for GMT mirror 5.

“The GMT will consist of six off-axis 8.4-meter mirrors that surround a central on-axis mirror to form a single optical surface 24.5 meters in diameter with a total collecting area of 368 square meters. In fact, the GMT mirrors will collect more light than any telescope ever built, with a resolving power 10 times greater than the Hubble Space Telescope.”

–Read the full story at SPIE