John M. Grunsfeld, positioned on a foot restraint on the end of Discovery's remote manipulator system (RMS), prepares to replace a radio transmitter in one of the Hubble Space Telescope (HST) electronics bay. Steven L. Smith, STS-103 payload commander, is at the lower right.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/144614754@N02">NASA Hubble Space Telescope</a>
2016-07-01 13:49
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/nasahubble/28024330075/">Astronaut John M. Grunsfeld</a>