![]() The peak temperature event is called “high fire” and will occur on March 6, 2021. At the peak of the melting process, the furnace spins at five revolutions per minute, heating the glass to 1,165 degrees Celsius (2,129 F) for approximately five hours until it liquefies into the mold. ![]() Caris Mirror Lab involves melting nearly 20 tons (38,490 pounds) of high-purity, low-expansion, borosilicate glass (called E6 glass) into the world’s only spinning furnace designed to cast giant mirrors for telescopes. The process of casting the giant mirror at Arizona’s Richard F. Caris Mirror Lab, The University of Arizona and Giant Magellan Telescope – GMTO Corporation Caris Mirror Lab at the University of Arizona. GMT mirror 5 is being fabricated at the Richard F. This timelapse shows several stages of the mirror casting process, including creating the light-weighted mirror mold, loading nearly 20 tons of borosilicate glass into the mold, and the furnace spinning at five revolutions per minute during “high fire,” heating the glass to 1,165 degrees Celsius (2,129 F) for approximately five hours until it liquefies into the mold. Due to the coronavirus pandemic, work on the sixth mirror began behind closed doors to protect the health of the 10-person mirror casting team at the lab. The mirror casting is considered a marvel of modern engineering and is usually celebrated with a large in-person event with attendees from all over the world. Caris Mirror Lab and will take nearly four years to complete. ![]() The sixth 8.4-meter (27.5 feet) mirror - about two stories high when standing on edge - is being fabricated at the University of Arizona’s Richard F. These mirrors will allow astronomers to see farther into the universe with more detail than any other optical telescope before. The Giant Magellan Telescope announces fabrication of the sixth of seven of the world’s largest monolithic mirrors. The 8.4-meter mirror joins five of the world’s largest mirrors previously cast for the Giant Magellan Telescope, one of the world’s largest and most anticipated extremely large telescopes. ![]()
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