Dropping in on a James Webb Space Telescope Clean Room Test

[Stephanie Wilson]

A crane in a clean room at NASA's Goddard Space Flight Center in Greenbelt, Md., lowers a test mass simulator (center of frame) onto the Ambient Optical Assembly Stand or AOAS to ensure it can support the James Webb Space Telescope's Optical Telescope Element during its assembly.> Read MoreImage Credit: NASA/Chris Gunn

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