Mike Massimino during the STS-125 Hubble Space Telescope EVA 4 - Our Planet
On May 11, 2009, Space shuttle Atlantis with its seven-member crew launched on the final mission to the Hubble Space Telescope, which launched on April 24, 1990. The STS-125 mission was the 126th shuttle flight, the 30th for Atlantis. It was referred to as Servicing Mission 4, although it is technically the fifth servicing flight to the space telescope. During the mission's fourth spacewalk, Michael Good and Michael Massimino faced a curious challenge: a stripped screw delayed the removal of a handrail (pictured inside the telescope to the upper right of Good's helmet in this photo) on the outside of the Space Telescope Imaging Spectrograph (STIS). After nearly four hours of troubleshooting, Good, Massimino, the rest of the crew and a team back on Earth found a way to remove the handrail and continue the mission.
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