Servicing the Hubble Space Telescope. The vast Hubble Space Telescope (HST) seen in the cargo bay of Shuttle Endeavour during the last spacewalk of the servicing mission, STS-61. Astronaut Story Musgrave is seen at the end of the Remote Manipulator System (RMS) arm, carrying covers for the newly-replaced magnetometers. Astronaut Jeffrey Hoffman is seen in the payload bay at bottom. In a series of five spacewalks, the crew of the Shuttle replaced one of the HST's cameras and its solar panels, installed a corrective optics package and completed many other servicing tasks. Mission STS-61 flew on 2-13 December 1993.