James Webb Space Telescope first flight mirror completes cryogenic testing

		IMAGE: NASA and Ball Aerospace engineering technicians guide two mounted mirrors into NASA Marshall Space Flight Center's X-ray and Cryogenic Facility's vacuum chamber for testing. Click here for more information.

HUNTSVILLE, Ala. - The first mirror segment that will fly on the James Webb Space Telescope, built by Northrop Grumman Corporation, has completed its first series of cryogenic temperature tests in the X-ray and Cryogenic Facility at the Marshall Space Flight Center in Huntsville, Ala.