Astronaut Richard M. Linnehan, STS-109 mission specialist, participates in the third of five space walks to perform work on the Hubble Space Telescope (HST). The third overall STS-109 extravehicular activity (EVA) marked the second of three for Linnehan, who was teamed with John M. Grunsfeld. On this particular walk, the telescope's power was turned off in order to replace its power control unit (PCU), the heart of HST’s electrical power system.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/144614754@N02">NASA Hubble Space Telescope</a>
2016-07-01 15:01
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nasahubble/27990746376/">Astronauts Richard M. Linnehan and John M. Grunsfeld EVA</a>