Dec 23 1999
From The Space Library
British-born U.S. astronaut C. Michael Foale and Swiss astronaut Claude Nicollier installed a new central computer on HST, 20 times faster than the telescope's previous one, and a refurbished, 550-pound (250-kilogram), fine guidance sensor. At 8 hours and 10 minutes, the pair's spacewalk was the third longest in NASA's history.
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