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Bagging a Spacecraft #2

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STEREO's "B" observatory is bagged, or covered with a protective material, and ready to be moved to another portion of APL's clean-room facilities where both the "A" and "B" observatories will undergo environmental tests that simulate the effects of launch. Placing a protective cover over a spacecraft protects it from particles, such as dust, that could contaminate an instrument or other portion of a spacecraft.

Credit: NASA/Johns Hopkins University Applied Physics Laboratory