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Webb Telescope Engineers to Test COCOA

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GREENBELT, Md., Dec. 22, 2011 — To verify the optical performance of the mirrors on the James Webb Space Telescope, NASA is using COCOA (center of curvature optical assembly) to check that the mirrors are perfectly shaped and will work in the frosty environment of space. Curvature is important in a mirror, just as the...Read full article

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