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Soyuz 21
Soyuz 21 ((ロシア語:Союз 21), ''Union 21'') was a 1976 Soviet manned mission to the Salyut 5 space station, the first of three flights to the station.〔The mission report is available here: http://www.spacefacts.de/mission/english/soyuz-21.htm〕 The mission's objectives were mainly military in scope, but included other scientific work. The mission ended abruptly with cosmonauts Boris Volynov and Vitaly Zholobov returning to earth after 49 days in orbit. The precise reason for the early end of the mission was the subject of much speculation, but was reported to be an emergency evacuation after the Salyut atmosphere developed an acrid odor. ==Crew==
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「Soyuz 21」の詳細全文を読む
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