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Mike Massimino wearing the liquid cooling and ventilation garment that complements the EMU spacesuit, is pictured in a hatch
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Mike Massimino peers through an opening of his Extravehicular Mobility Unit (EMU) spacesuit prior to donning it in preparation for the mission's fourth extravehicular activity (EVA)
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Mike Massimino attired in his EMU spacesuit, is pictured in the Atlantis' airlock prior to the start of the mission's fourth EVA
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Drew Feustel assists the spacewalking astronauts in the donning of their EMU spacesuits
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Michael Good peers through an opening of his EMU spacesuit prior to donning it in preparation for the mission's fourth EVA
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Scott Altman (right) and John Grunsfeld assist Michael Good in the donning of his EMU spacesuit on the middeck
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Michael Good gets help from John Grunsfeld, Scott Altman, and Gregory C. Johnson in the donning of his EMU spacesuit on the middeck
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Michael Good in Atlantis' airlock prior to the start of the mission's fourth EVA
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Mike Massimino and Mike Good work outside Atlantis during the fourth spacewalk
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Mike Massimino and Mike Good work outside Atlantis during the fourth spacewalk
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Mike Massimino rides the robotic arm up to begin the STIS repair
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Michael Good rides Atlantis' RMS arm to the exact position he needs to be to continue work on Hubble
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Michael Good repositions himself on Atlantis' RMS as he continues work on Hubble
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Hubble is silhouetted over the Florida peninsula
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Michael Good (left) and Mike Massimino perform STIS repair
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Michael Good assist Mike Massimino (not shown) with the STIS repair
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Mike Massimino stands inside Hubble while Mike Good rides the RMS
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Mike Massimino stands inside Hubble while Mike Good rides the RMS
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An almost nadir view of the John F. Kennedy Space Center (KSC). Only 9% of the land is developed, the rest serves as a
wildlife sanctuary
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Mike Massimino retreives tools
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Mike Good rides the RMS down to get more tools
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Back inside the telescope, Mike Massimino continues the STIS repair as Mike Good assists
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Scott Altman looks through an overhead window on the aft flight deck
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Megan McArthur uses a still camera at a window on the aft flight deck
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John Grunsfeld and Megan McArthur share a laugh on the aft flight deck
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With a mostly dark home planet behind him, Michael Good rides Atlantis' RMS arm to the exact position he needs to be to continue work
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Michael Good rides Atlantis' RMS arm to the exact position he needs to be to continue work on Hubble
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Mike Massimino is photographed as he peers in the aft flight deck window
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Megan McArthur poses for a photo with astronaut Mike Massimino as he looks through an aft flight deck window
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A clearly delighted Mike Massimino looks in at his shipmates
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Scott Altman works on the aft flight deck
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Scott Altman uses a communication system on the aft flight deck
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Michael Good positioned on a foot restraint on the end of Atlantis' RMS
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After a arduous EVA, Mike Massimino (left) and Michael Good, wearing the liquid cooling and ventilation garments that complement their EMU spacesuits, pose for a photo on the middeck
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Andrew Feustel looks through a window on the aft flight deck
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Andrew Feustel works on the aft flight deck
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