Hubble's Mr. Fix-It Astronomer and astronaut John Grunsfeld ‘80 helped give the Hubble Space Telescope its final makeover. by John Grunsfeld ’80 April 20, 2010 Slideshow: John Grunsfeld ’80 heading into the airlock on Space Shuttle Atlantis during spacewalk preparation on STS-125, the May 2009 mission to service the Hubble Space Telescope. Slideshow: Grunsfeld buttoned up in his Extravehicular Activity (EVA) spacesuit prior to a spacewalk on STS-125. Slideshow: Grunsfeld riding on the robotic arm during EVA5 preparing to replace one of the Hubble Space Telescope batteries. Slideshow: With Earth in the background, Grunsfeld hangs out on the Hubble while beginning the task of installing the Cosmic Origins Spectrograph. Slideshow: At the end of the 5th spacewalk, Grunsfeld takes a moment to take a picture with the EVA camera of his spacewalking partner Drew Feustel doing a headstand in the payload bay. Slideshow: On STS-109 in 2002, Grunsfeld signs a thumbs-up during a spacewalk to upgrade the Hubble Space Telescope, with Earth reflected in his visor. Slideshow: During STS-125, Grunsfeld proudly displays his brass rat He didn’t wear it in the spacesuit during his spacewalks, however. “I didn’t want to cut a hole in my suit and die,” he explains.