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Kosmos 27
Kosmos 27 ((ロシア語:Космос 27) meaning ''Cosmos 27''), also known as Zond 3MV-1 No.3 was a space mission intended as a Venus flyby. The spacecraft was launched by a Molniya-M carrier rocket, however an upper stage malfunction resulted in the spacecraft failing to leave low Earth orbit.
Beginning in 1962, the name Kosmos was given to Soviet spacecraft which remained in Earth orbit, regardless of whether that was their intended final destination. The designation of this mission as an intended planetary probe is based on evidence from Soviet and non-Soviet sources and historical documents. Typically Soviet planetary missions were initially put into an Earth parking orbit as a launch platform with a rocket engine and attached probe. The probes were then launched toward their targets with an engine burn with a duration of roughly 4 minutes. If the engine misfired or the burn was not completed, the probes would be left in Earth orbit and given a Kosmos designation.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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