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HUBBLE TEST TELESCOPE

The test telescope was used for a variety of tests, such as handling equipment and procedures checkout, as shown here. It was also subjected to the same noise and vibration (structural dynamics) that the flight telescope would experience during launch, as well as the extreme temperatures to be encountered in space. Technicians used it as a testbed to lay out wiring harnesses and evaluate features that would enable the telescope to be repaired in orbit.
HST/SDTV at Lockheed
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Before the first servicing mission in late 1993, the crew practiced some of the repair tasks using the test vehicle on display in the Museum. Since then it has been refurbished to depict the orbiting Hubble Space Telescope.
Hubble in gallery after refurbished
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Two wing-like solar arrays provide power for the telescope. Each solar array is 12.2 meters (40 feet) long by 2.5 meters (8 feet 2 inches) wide. After replacement in 1993, one of them was returned to Earth for inspection. The arrays on the test vehicle are shown in their stowed position.

In December 1993, in one of the most dramatic missions of the U.S. space program, the STS-61 crew serviced the Hubble Space Telescope in the payload bay of the Shuttle Endeavour. They replaced the solar arrays, a wide-field planetary camera, and other components. They also installed a corrective optics package to compensate for a flaw in the shape of the primary mirror, thereby improving the telescope's performance.
HST servicing, 1993 HST servicing, 1993 HST servicing, 1993
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The Hubble Space Telescope fits into the paylod bay of the Space Shuttle orbiter.
HST servicing, 1993
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