Fifth STS-125 Spacewalk Under Way

Astronauts John Grunsfeld and Andrew Feustel began the fifth and final STS-125 spacewalk at 8:20 a.m. EDT. It is scheduled to last 5 hours, 45 minutes.

Grunsfeld is wearing a spacesuit marked with solid red stripes. Feustel is wearing an all white spacesuit.

For this spacewalk, the astronauts will begin with some setup tasks and then move to install the second battery group replacement in an equipment bay above the Wide Field Camera 2 and next to the compartment where the first battery set was installed on the second spacewalk of the flight.

The two astronauts then will remove and replace one of the three Fine Guidance Sensors, FGS-2, used to provide pointing information for the spacecraft. Grunsfeld and Feustel’s last task before closing up the telescope for good will be to remove and replace thermal blankets (NOBL) protecting Hubble’s electronics.