NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Hubble Telescope servicing. Astronauts perform an ExtraVehicular Activity (EVA or "spacewalk") during a space shuttle mission to service the Hubble Space Telescope (HST). Astronaut Joseph Tanner (perched on the Remote Manipulator System robot arm) aims a camera at Hubble's solar panels whilst Gregory Harbaugh (at centre left) assists. Photographed from the shuttle Discovery during mission STS-82 (11-21 February 1997). This mission was the second to service the HST since its launch in 1990. Five EVAs were performed to add improved instruments and replace some aging components. The shuttle also lifted the HST into a slightly higher orbit.
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