Installation of Solar Panel on Hubble

Astronauts John M. Grunsfeld, STS-109 payload commander, works in tandem with astronaut Richard M. Linnehan, mission specialist, as the two devote their attention to the replacing one of the Hubble Space Telescope (HST) two flexible second-generation solar arrays, known as SA2, and a Diode Box Assembly. The solar array was replaced with a new, rigid third-generation solar array (SA3). Linnehan stands on a foot restraint on the end of the Space Shuttle Columbia's Remote Manipulator System (RMS). The spacewalkers also did some preparatory tasks for other extravehicular activities (EVAs).