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Webb Telescope Completes First Round of Mirror Tests

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GREENBELT, Md., June 20, 2011 — The first six of 18 segments that will form the James Webb Space Telescope’s primary mirror has undergone final cryogenic testing. The 10-week series included two test cycles where the mirrors were chilled down to -379 °F, then back to ambient temperature to ensure that they respond as expected to the extreme temperatures of space. After completing final cryogenic testing this week at Marshall Space Flight Center, engineers and technicians guided six mirror segments for the James Webb Space Telescope off the rails. (Image: Emmett Given, NASA) Each mirror segment,...Read full article

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    Published: June 2011
    Glossary
    infrared astronomy
    The study and the interpretation of the infrared emittances of celestial bodies and phenomena.
    AmericasBall Aerospace & Technologies Corp.Basic ScienceberylliumCanadian Space Agencycryogenic testingEuropean Space AgencyImaginginfrared astronomyJames Webb Space TelescopeL-3 Tinsley Laboratories Inc.Marshall Space Flight CenterNASANorthrop Grummanprimary mirrorsResearch & TechnologyX-ray and Cryogenic Facility

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