Space Shuttle Columbia
Space Shuttle Columbia was a Space Shuttle orbiter manufactured by Rockwell International and operated by NASA. Named after the first American ship to circumnavigate the globe, and the female personification of the United States, Columbia was the first of five Space Shuttle orbiters to fly in space, debuting the Space Shuttle launch vehicle on its maiden flight on April 12, 1981 and becoming the first spacecraft to be re-used after its first flight when it launched on STS-2 on November 12, 1981. As only the second full-scale orbiter to be manufactured after the Approach and Landing Test vehicle Enterprise, Columbia retained unique external and internal features compared with later orbiters, such as test instrumentation and distinctive black chines. In addition to a heavier aft fuselage and the retention of an internal airlock throughout its lifetime, these made Columbia the heaviest of the five spacefaring orbiters: around heavier than Challenger and heavier than Endeavour when originally constructed. Columbia also carried ejection seats based on those from the SR-71 during its first six flights until 1983, and from 1986 onwards carried an imaging pod on its vertical stabilizer.
During its 22 years of operation, Columbia was flown on 28 missions in the Space Shuttle program, spending over 300 days in space and completing over 4,000 orbits around Earth. NASA's flagship orbiter, Columbia often flew flights dedicated to scientific research in orbit following the loss of Challenger in 1986. Columbia was used for eleven of the fifteen flights of Spacelab laboratories, all four United States Microgravity Payload missions, and the only flight of Spacehab's Research Double Module. Columbia flew many of the longest duration space shuttle missions, all dedicated to scientific research. The only space shuttle that could rival Columbia's long missions was Endeavour, which flew the STS-67 mission that lasted for nearly 17 days. In 1992, NASA modified Columbia to be able to fly some of the longest missions in the Shuttle Program history using the Extended Duration Orbiter pallet. The orbiter used the pallet in thirteen of the pallet's fourteen flights, which aided lengthy stays in orbit for scientific and technological research missions. The longest duration flight of the Shuttle Program, STS-80, was flown with Columbia in 1996, at over 17 days in orbit. Columbia was also used to deploy the first ever satellites into orbit by the Shuttle on STS-5, retrieve the Long Duration Exposure Facility and deploy the Chandra observatory, which was the heaviest payload ever carried by the Space Shuttle. Columbia also carried into space the first female commander of an American spaceflight mission, the first ESA astronaut, the first female astronaut of Indian origin, and the first Israeli astronaut.
At the end of its final flight in February 2003, Columbia disintegrated upon reentry, killing the seven-member crew of STS-107 and destroying most of the scientific payloads aboard. The Columbia Accident Investigation Board convened shortly afterwards concluded that damage sustained to the orbiter's left wing during the launch of STS-107 fatally compromised the vehicle's thermal protection system. The loss of Columbia and its crew led to a refocusing of NASA's human exploration programs and led to the establishment of the Constellation program in 2005 and the eventual retirement of the Space Shuttle program in 2011. Numerous memorials and dedications were made to honor the crew following the disaster; the Columbia Memorial Space Center was opened as a national memorial for the accident, and the Columbia Hills in Mars' Gusev crater, which the Spirit rover explored, were named after the crew. The majority of Columbias recovered remains are stored at the Kennedy Space Center's Vehicle Assembly Building, though some pieces are on public display at the nearby Visitor Complex.
History
Construction began on Columbia in 1975 at Rockwell International's principal assembly facility in Palmdale, California, a suburb of Los Angeles. Columbia was named after the American sloop Columbia Rediviva which, from 1787 to 1793, under the command of Captain Robert Gray, explored the US Pacific Northwest and became the first American vessel to circumnavigate the globe. It is also named after the command module of Apollo 11, the first crewed landing on another celestial body. Columbia was also the female symbol of the United States. After construction, the orbiter arrived at Kennedy Space Center on March 25, 1979, to prepare for its first launch. Columbia was originally scheduled to lift off in late 1979, however the launch date was delayed by problems with both the RS-25 engine and the thermal protection system. On March 19, 1981, during preparations for a ground test, workers were asphyxiated in Columbia's nitrogen-purged aft engine compartment, resulting in two or three fatalities.The first flight of Columbia was commanded by John Young, a veteran from the Gemini and Apollo programs who in 1972 had been the ninth person to walk on the Moon; and piloted by Robert Crippen, a rookie astronaut originally selected to fly on the military's Manned Orbital Laboratory spacecraft, but transferred to NASA after its cancellation, and served as a support crew member for the Skylab and Apollo-Soyuz missions.
Columbia spent 610 days in the Orbiter Processing Facility, another 35 days in the Vehicle Assembly Building, and 105 days on Pad 39A before finally lifting off. It was successfully launched on April 12, 1981, the 20th anniversary of the first human spaceflight, and returned on April 14, 1981, after orbiting the Earth 36 times, landing on the dry lakebed runway at Edwards Air Force Base in California. It then undertook three further research missions to test its technical characteristics and performance. Its first operational mission, with a four-man crew, was STS-5, which launched on November 11, 1982. At this point Columbia was joined by Challenger, which flew the next three shuttle missions, while Columbia underwent modifications for the first Spacelab mission.
Image:NASA salutes Reagans.jpg|thumb|right|alt=Astronauts salute dignitaries with the Shuttle's rear landing gear and gear door prominently behind, and other landing support vehicles around the orbiter.|Columbia astronauts Thomas K. Mattingly and pilot Henry Hartsfield salute President Ronald Reagan, standing beside his wife, Nancy, upon landing in 1982
In 1983, Columbia, under the command of John Young on what was his sixth spaceflight, undertook its second operational mission, in which the Spacelab science laboratory and a six-person crew was carried, including the first non-American astronaut on a space shuttle, Ulf Merbold. After the flight, it spent 18 months at the Rockwell Palmdale facility beginning in January 1984, undergoing modifications that removed the Orbiter Flight Test hardware and updating it to similar specifications as those of its sister orbiters. At that time the shuttle fleet was expanded to include Discovery and Atlantis.
Columbia returned to space on January 12, 1986, with the launch of STS-61-C. The mission's crew included Franklin Chang-Diaz, and the first sitting member of the House of Representatives to venture into space, Bill Nelson.
The next shuttle mission, STS-51-L, was undertaken by Challenger. It was launched on January 28, 1986, ten days after STS-61-C had landed, and ended in disaster 73 seconds after launch. Prior to the accident, Columbia had been slated to be ferried to Vandenberg Air Force Base to conduct fueling tests and to perform a flight readiness firing at SLC-6 to validate the west coast launch site. In the aftermath, NASA's shuttle timetable was disrupted, and the Vandenberg tests, which would have cost $60 million, were canceled. Columbia was not flown again until 1989, after which it resumed normal service as part of the shuttle fleet.
STS-93, launched on July 23, 1999, was the first U.S. space mission with a female commander, Lt. Col. Eileen Collins. This mission deployed the Chandra X-ray Observatory.
Columbia's final complete mission was STS-109, the fourth servicing mission for the Hubble Space Telescope. Its next mission, STS-107, culminated in the orbiter's loss when it disintegrated during reentry, killing all seven of its crew.
Consequently, President George W. Bush decided to retire the Shuttle orbiter fleet by 2010 in favor of the Constellation program and its crewed Orion spacecraft. The Constellation program was later canceled with the NASA Authorization Act of 2010 signed by President Barack Obama on October 11.