Out on a Limb
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Out on a Limb

June 24, 2009
STS-125 Mission Specialist John Grunsfeld participates in the mission's fifth and final session of extravehicular activity (EVA).

During the seven-hour and two-minute spacewalk, Grunsfeld and Mission Specialist Andrew Feustel (out of frame) installed a battery group replacement, removed and replaced a Fine Guidance Sensor and three thermal blankets protecting Hubble's electronics.

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