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). Linnehan's sun shield reflects astronaut John M. Grunsfeld and the blue and white Earth hemisphere as well as one of the telescope's new solar arrays. The third overall STS-109 extravehicular activity (EVA) marked the second of three for Linnehan and Grunsfeld, payload commander. On this particular walk, the power to the telescope was turned off in order to replace the 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/27990746206/">Astronaut Richard M. Linnehan</a>