Astronauts Set to Make First Hubble Spacewalk

STS-125 astronauts John Grunsfeld and Drew Feustel are set to make the first of five Hubble servicing spacewalks Thursday. Scheduled to begin work at 8:16 a.m. EDT, the astronauts will remove Hubble's Wide Field Planetary Camera 2 and replace it with the new Wide Field Camera 3. They will also replace a failed science data processing computer that delayed the launch from last October and install a mechanism for a spacecraft to capture Hubble for de-orbit at the end of its life. More

(Source: NASA - May 14)