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Hubble is the only telescope designed to be serviced in space by astronauts. After launch by Space Shuttle Discovery in 1990, four subsequent Space Shuttle missions repaired, upgraded, and replaced systems on the telescope. A fifth mission was canceled on safety grounds following the Columbia disaster (2003).
One of. the most famous telescopes, the âHubbleâ was developed by the. National Aeronautics and Space Administration (NASA). Its mirror. has a diameter of 2.5 meters (250 cm) directed towards the stars to. collect their light.