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NASA’s Webb Telescope Gets Its Wings

A massive backplane that will hold the primary mirror of NASA’s James Webb Space Telescope nearly motionless while it peers into space is another step closer to completion with the recent assembly of the support structure’s wings.

The wings enable the mirror, made of 18 pieces of beryllium, to fold up and fit inside a 16.4-foot (5-meter) fairing on a rocket, and then unfold to 21 feet in diameter after the telescope is delivered to space. All that is left to build is the support fixture that will house an integrated science instrument module, and technicians will connect the wings and the backplane’s center section to the rest of the observatory. The center section was completed in April 2012…

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