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October 27, 2011
Astronauts Andrew Feustel (center) and John Grunsfeld (mostly obscured, positioned on a foot restraint on the end of Atlantis' remote manipulator system), both STS-125 mission specialists, participate in the mission's fifth and final session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the seven-hour and two-minute spacewalk, Feustel and Grunsfeld installed a battery group replacement, removed and replaced a Fine Guidance Sensor and three thermal blankets (NOBL) protecting Hubble's electronics. The Gulf of California provides the backdrop for the scene.

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