The last repair visit to Hubble, saved from cancellation
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Servicing Mission 4 was the fifth and final astronaut visit to the Hubble Space Telescope, flown by Space Shuttle Atlantis as STS-125 from 11 May 2009. Seven astronauts installed two new instruments, repaired two failed ones in orbit for the first time, and replaced the gyroscopes and batteries that keep Hubble working.
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Servicing Mission 4 was the fifth and final servicing of the Hubble Space Telescope.
Published 11 May 2021