Astronaut Thomas D. Akers maneuvers inside the bay which will house the Corrective Optics Space Telescope Axial Replacement (COSTAR) while assisting astronaut Kathryn C. Thornton with the installation of the 640-pound instrument. Thornton, anchored on the end of the Remote Manipulator System (RMS) arm, is partially visible as she prepares to install COSTAR. The two space walkers participated in the mission's second and fourth (of five total) extravehicular activities (EVAs) designed to upgrade and repair the giant telescope.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/144614754@N02">NASA Hubble Space Telescope</a>
2012-01-19 00:11
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nasahubble/27514165564/">Astronauts Akers and Thornton during Installation of COSTAR into Hubble Space Telescope</a>