NASA's next generation space telescope marks key milestone
Friday, April 15, 2011 - 10:30
in Astronomy & Space
(PhysOrg.com) -- The first six of 18 segments that will form NASA's James Webb Space Telescope's primary mirror for space observations will begin final round-the-clock cryogenic testing this week. These tests will confirm the mirrors will respond as expected to the extreme temperatures of space prior to integration into the telescope's permanent housing structure.