Astronauts Mike Massimino and Mike Good have begun the second of five spacewalks planned to repair and upgrade the Hubble Space Telescope for the last time. The pair switched their spacesuits from power provided by space shuttle Atlantis to battery power at 8:49 a.m. EDT, and a few minutes later Massimino was the first to stepp out of the airlock leading to the shuttle's cargo bay.
The spacewalk is scheduled to last six-and-a-half hours.
Good, whose white spacesuit is marked with red barber pole stripes, will primarily be riding on the end of the shuttle's robotic arm during the spacewalk.
Massimino, wearing a suit identified by broken red stripes, will be working inside Hubble to install six new gyroscopes.
The team will also install a new set of batteries.
Mission specialists John Grunsfeld and Drew Feustel, who completed the mission's first spacewalk on Thursday, are assisting Massimino and Good from inside Atlantis.
The spacewalk is the 20th to service Hubble. The first 19 have totaled 136 hours and 30 minutes.
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