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s125e007864

October 28, 2011
With the Hubble Space Telescope in the background, astronaut Andrew Feustel, STS-125 mission specialist, is seen here working during the mission's third extravehicular activity (EVA). Feustel and astronaut John Grunsfeld (out of frame), mission specialist, removed the Corrective Optics Space Telescope Axial Replacement and installed in its place the new Cosmic Origins Spectrograph. They also completed the Advanced Camera for Surveys electronic card replacement work, and completed part 2 of the ACS repair, installing a new electronics box and cable.


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