The final three of 18 primary mirrors for NASA's James Webb Space Telescope arrived at NASA's Goddard Space Flight Center in Greenbelt, Md., for integration prior to a scheduled launch in 2018.
The final three of 18 primary mirrors for NASA's James Webb Space Telescope arrived at NASA's Goddard Space Flight Center in Greenbelt, Md., for integration prior to a scheduled launch in 2018.
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