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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Space Shuttle orbiter ： ウィキペディア英語版 Space Shuttle orbiter The Space Shuttle orbiter was the reusable spaceplane component of the Space Shuttle program. Operated by NASA,〔(【引用サイトリンク】title=Facts About the Space Shuttles )〕 the U.S. space agency, this vehicle could carry astronauts and payloads into low Earth orbit, perform in-space operations, then re-enter the atmosphere and land as a glider, returning its crew and any on-board payload to the Earth. Six orbiters were built for flight: ''Enterprise'', ''Columbia'', ''Challenger'', ''Discovery'', ''Atlantis'', and ''Endeavour''. All were built in Palmdale, California, by the Pittsburgh, Pennsylvania-based Rockwell International company. The first orbiter, ''Enterprise'', made its maiden flight in 1977. An unpowered glider, it was carried by a modified Boeing 747 airliner called the Shuttle Carrier Aircraft and released for a series of atmospheric test flights and landings. The remaining orbiters were fully operational spacecraft, and were launched vertically as part of the Space Shuttle stack. ''Enterprise'' was partially disassembled and retired after completion of critical testing. ''Columbia'' was the first space-worthy orbiter, and made its inaugural flight in 1981. ''Challenger'', ''Discovery'', and ''Atlantis'' followed in 1983, 1984 and 1985 respectively. In 1986, ''Challenger'' was destroyed in an accident shortly after launch. ''Endeavour'' was built as ''Challenger''s replacement, and was first launched in 1992. In 2003, ''Columbia'' was destroyed during re-entry, leaving just three remaining orbiters. ''Discovery'' completed its final flight on March 9, 2011, and ''Endeavour'' completed its final flight on June 1, 2011. ''Atlantis'' completed the last ever Shuttle flight, STS-135, on July 21, 2011. In addition to their crews and payloads, the reusable orbiter carried most of the Space Shuttle System's liquid-fueled rocket propulsion system, but both the liquid hydrogen fuel and the liquid oxygen oxidizer for its three main rocket engines were fed from an external cryogenic propellant tank. Additionally, two reusable solid rocket boosters provided additional thrust for approximately the first two minutes of launch. The orbiters themselves did carry hypergolic propellants for their RCS thrusters and Orbital Maneuvering System engines. ==Description== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Space Shuttle orbiter」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.