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Kosmos 300
Kosmos 300 ((ロシア語:Космос 300) meaning ''Cosmos 300'') (Ye-8-5 series) was the fourth Soviet attempt at an unmanned lunar sample return. It was probably similar in design to the later Luna 16 spacecraft. It was launched, on a Proton rocket, on September 23, 1969. The mission was a failure. The engines on the Block D upper stage failed, leaving the spacecraft stranded in Earth orbit. ==External links==
* (Zarya - Luna programme chronology )
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