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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).
Beyond Hubble: The Next Generation Space Telescope. Hubble's important mission will come to an end one day in the future. But the telescope's ultimate retirement will not signal the end of our unrivaled view of the universe.Rather, it will mark a new beginning -- and even more amazing discoveries and images from space. For Hubble has a successor.eyond Hubble: The Next Generation Space Telescope. Hubble's important mission will come to an end one day in the future. But the telescope's ultimate retirement will not signal the end of our unrivaled view of the universe.