STS-125 MS3 Grunsfeld and MS5 Feustel during EVA5

S125-E-009890 (18 May 2009) --- Astronaut John Grunsfeld, STS-125 mission specialist, positioned on a foot restraint on the end of Atlantis? remote manipulator system (RMS), and astronaut Andrew Feustel (foreground), mission specialist, 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, Grunsfeld and Feustel installed a battery group replacement, removed and replaced a Fine Guidance Sensor and three thermal blankets (NOBL) protecting Hubble?s electronics.