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#30 |
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USSR probes
Luna 2 crashed 13 September 1959 Luna 5 crashed 12 May 1965 Luna 7 crashed 7 October 1965 Luna 8 crashed 6 December 1965 Luna 9 landed 3 February 1966 Luna 13 landed 24 December 1966 Luna 15 crashed 21 July 1969 Luna 16 landed 20 September 1970 Luna 17 landed 17 November 1970 Luna 18 crashed 11 September 1971 Luna 20 landed 21 February 1972 Luna 21 landed 15 January 1973 Luna 23 landed 6 November 1974 Luna 24 landed 18 August 1976 NASA / US probes Ranger 4 crashed 26 April 1962 Ranger 6 crashed 2 February 1964 Ranger 7 crashed 31 July 1964 Ranger 8 crashed 20 February 1965 Ranger 9 crashed 24 March 1965 Surveyor 1 landed 2 June 1966 Surveyor 2 crashed 23 September 1966 Surveyor 3 landed 20 April 1967 Surveyor 4 crashed (or possibly exploded just above surface) 17 July 1967 Surveyor 5 landed 11 September 1967 Surveyor 6 landed 10 November 1967 Surveyor 7 landed 10 January 1968 Lunar Orbiter 1 crashed 29 October 1966 Lunar Orbiter 2 crashed 11 October 1967 Lunar Orbiter 3 crashed 9 October 1967 Lunar Orbiter 4 crashed 31 October 1967 Lunar Orbiter 5 crashed 31 January 1968 There have been six manned moon landings - Apollo 11 landed 20 July 1969 Apollo 12 landed 19 November 1969 Apollo 14 landed 5 February 1971 Apollo 15 landed 30 July 1971 Apollo 16 landed 20 April 1972 Apollo 17 landed 11 December 1972 LOl, wouldn't want to be a statistician on this one |
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Actually, from my understanding, most Moon probes either fell short or overflew the Moon
As I have stated years ago, the Moon-Earth L1 is not known now (?) nor then.... [I have an accurate number] This meant that a probe could not enter the Moon's spin space with a minimum known velocity as well an orbit around the Moon is quite eccentric. It was all hit or miss back then... there was no scientific logic involved. I am sure that today the hit/miss parameters are a little more worked out... but I suspect Moon-Earth L1 is still only an approximation at all space centres. Mars is an entirely different set of parameters... circular orbits..known velocities...atmosphere... L1 known (I suspect at least a reasonable approximation) It is much much easier to land on Mars than on the Moon. |
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Actually, from my understanding, most Moon probes either fell short of overflew the Moon |
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