Cosmos 300
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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.
| Preceded by Luna 15 |
Luna programme | Succeeded by Cosmos 305 |
| Luna programme |
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| Luna 1958A | Luna 1958B | Luna 1958C | Luna 1 | Luna 1959A | Luna 2 | Luna 3 | Luna 1960A | Luna 1960B | Sputnik 25 | Luna 1963B | Luna 4 | Luna 1964A | Luna 1964B | Cosmos 60 | Luna 1965A | Luna 5 | Luna 6 | Luna 7 | Luna 8 | Luna 9 | Cosmos 111 | Luna 10 | Luna 1966A | Luna 11 | Luna 12 | Luna 13 | Luna 1968A | Luna 14 | Luna 1969A | Luna 1969B | Luna 1969C | Luna 15 | Cosmos 300 | Cosmos 305 | Luna 1970A | Luna 1970B | Luna 16 | Luna 17 | Luna 18 | Luna 19 | Luna 20 | Luna 21 | Luna 22 | Luna 23 | Luna 1975A | Luna 24 | ||||
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