Hubble Space Telescope 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
Space Shuttle Columbia southern California. The facility is also a hands-on learning center with interactive exhibits, workshops, and classes about space science, astronautics, and the Space Shuttle program's legacy — providing educational opportunities for all ages. The Shuttle's final crew was honored in 2003 when the United States Board on Geographic Names approved the name Columbia Point for a mountain in Colorado's Sangre de Cristo Mountains, less than a half-mile from Challenger Point, a peak named after America's other lost Space Shuttle. The Columbia Hills on Mars were also named in honor of the crew, and a host of other memorials were dedicated