Hubble Telescope servicing. Astronaut performs an ExtraVehicular Activity (EVA or "spacewalk") during a space shuttle mission to service the Hubble Space Telescope (HST). Astronaut Mark C. Lee is holding a camera; a repaired area of Hubble's insulation material (silver) is at left; some of Hubble's solar panels are at top. 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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