Title: Marshall Space Flight Center
Content: of the launch vehicle. Finally, on April 24, 1990, on Mission STS-31, Shuttle "Discovery" launched the Hubble telescope successfully into its planned orbit. Almost immediately it was realized that the optical performance was not as expected; analysis of the flawed images showed that the primary mirror had been ground to the wrong shape, resulting in spherical aberration. Fortunately, the Hubble telescope had been designed to allow in-space maintenance, and in December 1993, mission STS-61 carried astronauts to the Hubble to make corrections and change some components. A second repair mission, STS-82, was made in February 1997, and a third, STS-103,

Title: STS-61
Content: STS-61 STS-61 was the first Hubble Space Telescope servicing mission, and the fifth flight of the Space Shuttle "Endeavour". The mission launched on 2 December 1993 from Kennedy Space Center in Florida. The mission restored the spaceborne observatory's vision, marred by spherical aberration, with the installation of a new main camera and a corrective optics package. This correction occurred more than three and a half years after the Hubble was launched aboard STS-31 in April 1990. The flight also brought instrument upgrades and new solar arrays to the telescope. With its very heavy workload, the STS-61 mission was one of

Title: STS-61
Content: slowly away from HST. Landing of the Shuttle occurred at Kennedy Space Center on Runway 33 at 12:26 am on 13 December 1993. STS-61 STS-61 was the first Hubble Space Telescope servicing mission, and the fifth flight of the Space Shuttle "Endeavour". The mission launched on 2 December 1993 from Kennedy Space Center in Florida. The mission restored the spaceborne observatory's vision, marred by spherical aberration, with the installation of a new main camera and a corrective optics package. This correction occurred more than three and a half years after the Hubble was launched aboard STS-31 in April 1990. The

Title: Hubble Space Telescope
Content: data, while the Goddard Space Flight Center controls the spacecraft. Space telescopes were proposed as early as 1923. Hubble was funded in the 1970s, with a proposed launch in 1983, but the project was beset by technical delays, budget problems, and the "Challenger" disaster (1986). When finally launched in 1990, Hubble's main mirror was found to have spherical aberration, compromising the telescope's capabilities. The optics were corrected to their intended quality by a servicing mission in 1993. Hubble is the only telescope designed to be serviced in space by astronauts. After launch by in 1990, five subsequent Space Shuttle missions

Title: Marshall Space Flight Center
Content: aberration due to incorrect grinding and polishing by the contractor. The defect was found when the telescope was in orbit. The design was such that repairs were possible, and three maintenance missions were flown in Shuttles during the 1990s. Another servicing mission (STS-109) was flown on March 1, 2002. Each mission resulted in considerable improvements, with the images receiving worldwide attention from astronomers as well as the public. Based on the success of earlier maintenance missions, NASA decided to have a fifth service mission to Hubble; this was STS-125 flown on May 11, 2009. The maintenance and addition of equipment

Question: Which telescope was launched into space on board a space shuttle in 1990?
Answer: Hubble