Hubble's fifth and final servicing mission, Servicing Mission 4, launched on May 11, 2009 on Space Shuttle Atlantis as part of the STS-125 mission.
During SM4, two new scientific instruments were installed – the Cosmic Origins Spectrograph (COS) and Wide Field Camera 3 (WFC3). Two failed instruments, the Space Telescope Imaging Spectrograph (STIS) and the Advanced Camera for Surveys (ACS), were brought back to life by the first ever on-orbit repairs. With these efforts, Hubble has been brought to the apex of its scientific capabilities. To prolong Hubble's life, new batteries, new gyroscopes, a new science computer, a refurbished fine guidance sensor and new insulation on three electronics bays were also installed over the 12-day mission with five spacewalks.
00:18 - Astronauts training in the Neutral Buoyancy Lab egress from the airlock and prepare equipment needed to work on Hubble. They move toward the Hubble aft shroud and open its doors.
16:35 - Astronauts train in the Neutral Buoyancy Lab to repair the failed Space Telescope Imagine Spectrograph (STIS.)
34:05 - Astronauts train in the Neutral Buoyancy Lab to replace the Wide Field Planetary Camera 2 with the Wide Field Camera 3.
38:43 - Astronauts train in the Neutral Buoyancy Lab to replace the Corrective Optics Space Telescope Axial Replacement (COSTAR) with the new Cosmic Origins Spectograph (COS) instrument.
41:28 - Astronauts train in the Neutral Buoyancy Lab to replace Hubble's aging batteries.
46:24 - Astronauts train ni the Neutral Buoyancy Lab to put New Outer Blanket Layers on Hubble.
49:14 - Goddard engineers, crew, and mission operations personnel work and communicate with the astronauts in the Neutral Buoyancy Lab from the control center. The Remote Manipulator System (RMS) is controlled here.
52:33 - Astronauts ascend from the Neutral Buoyancy Lab and doff their suits, talk with engineers poolside, and later review the training run at the post-run meeting.
An overview of plans for Hubble Servicing Mission 4 produced by Mike McClare in 2008.
Hubble Space Telescope Servicing Mission 4 is the last time humans will visit Hubble. NASA's scientists, engineers and astronauts are working together to make Hubble better than it has been before. See what NASA has planned for this last mission to Hubble; from new science instruments, to two challenging and never-done-before instrument repairs, and numerous upgrades.