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DOS-2 designation given to a space station, launched as part of the Salyut programme, which was lost in a launch failure on 29 July 1972, when the failure of the second stage of its Proton-K launch vehicle prevented the station from achieving orbit. It instead fell into the Pacific Ocean. The station, which would have been given the designation Salyut 2 had it reached orbit, was structurally identical to Salyut 1, as it had been assembled as a backup unit for that station.〔 Four teams of cosmonauts were formed to crew the station, of which two would have flown:〔 *Alexey Leonov and Valeri Kubasov *Vasily Lazarev and Oleg Makarov *Aleksei Gubarev and Georgi Grechko *Pyotr Klimuk and Vitaly Sevastyanov Whilst Salyut 1 has been visited by two three-man crews (Soyuz 10 and Soyuz 11), following modifications to the Soyuz 7KT-OK spacecraft (resulting in the new model Soyuz 7K-T) following the deaths of the crew of Soyuz 11, the spacecraft could only carry two cosmonauts, thus DOS-2 would have been manned by two crews of two. Following the loss of the station, the crews were transferred to the DOS-3 programme.〔 ==References== 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「DOS-2」の詳細全文を読む スポンサード リンク
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