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James Webb Space Telescope Completes Cryogenic Mirror Test
07.27.10
 
Kimberly Newton
Marshall Space Flight Center, Huntsville, Ala.
256-544-6162
Kimberly.d.newton@nasa.gov

Rob Gutro
Goddard Space Flight Center, Greenbelt, Md.
301-286-4044
Robert.J.Gutro@nasa.gov

Sally Koris
Northrop Grumman Corporation, Redondo Beach, Calif.
310-812-4721
sally.koris@ngc.com

Image release: 10-094


During cryogenic testing, the mirrors will be subjected to temperatures dipping to -415 degrees Fahrenheit, permitting engineers to measure in extreme detail how the shape of each mirror changes as it cools. › Large (4256 x 2832, 240 ppi)
› Medium (516 x 343, 72 ppi)
› Small (100 x 75, 72 ppi)

During cryogenic testing, the mirrors will be subjected to temperatures dipping to -415 degrees Fahrenheit, permitting engineers to measure in extreme detail how the shape of each mirror changes as it cools. (NASA/MSFC/David Higginbotham/Emmett Given)

Six of the 18 Webb telescope mirrors are readied for shipment. › Large (4256 x 2832, 240 ppi)
› Medium (516 x 343, 72 ppi)
› Small (100 x 75, 72 ppi)

Six of the 18 Webb telescope mirrors are readied for shipment. All of the 18 mirror segments will be cryogenically tested twice in the Marshall Center's X-ray & Cryogenic Facility -- once with bare polished beryllium and then again after a thin coating of gold is applied to gain optimal reflectance in the infrared. (NASA/MSFC/David Higginbotham/Emmett Given)

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