STS-125 MS1 Good and MS4 Massimino during EVA4

S125-E-009542 (17 May 2009) --- Astronaut Michael Good, STS-125 mission specialist, positioned on a foot restraint on the end of Space Shuttle Atlantis? remote manipulator system (RMS); and astronaut Mike Massimino (lower right, partially out of frame), mission specialist, participate in the mission?s fourth session of extravehicular activity (EVA) as work continues to refurbish and upgrade the Hubble Space Telescope. During the eight-hour, two-minute spacewalk, Good and Massimino continued repairs and improvements to the Space Telescope Imaging Spectrograph (STIS) that will extend the Hubble?s life into the next decade.