NASA / SCIENCE PHOTO LIBRARY NASA / SCIENCE PHOTO LIBRARY
Rehearsal for the HST repair mission. Space-suited astronauts Kathy Thornton and Tom Akers seen during training for Shuttle Mission STS-61, the repair of the Hubble Space Telescope. To simulate working under zero gravity in orbit, the astronauts train inside a deep pool of water known as WET-F (Weightless Environment Training Facility). Here, the astronauts are practicing the removal of the telescope's Wide Field and Planetary Camera (WFPC), prior to inserting an updated version. At the bottom of the pool (out of frame) is a mock-up of the Shuttle's cargo bay area. STS-61 is scheduled for flight in December 1993.
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