Luna-10 1966 Soviet Robotic Lunar Probe_ Russian Space Exploration _Pin Badge

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Luna-10 1966 Soviet Robotic Lunar Probe_ First Sputnik of the Moon_ Russian Space Exploration _Pin Badge
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Luna-10
was a 1966 Soviet Lunar robotic spacecraft mission, also called Lunik-10. It was the first artificial satellite of the Moon.
Luna-10 conducted extensive research in lunar orbit, gathering important data on the strength of the Moon's magnetic field, its radiation belts, and the nature of lunar rocks (which were found to be comparable to terrestrial basalt rocks), cosmic radiation, and micrometeoroid density. Perhaps its most important finding was the first evidence of mass concentrations (called "mascons") — areas of high density below the mare basins that distort lunar orbital trajectories. Their discovery has usually been credited to the American Lunar Orbiter series.
Luna-10 was battery powered and operated for 460 lunar orbits and 219 active data transmissions before radio signals were discontinued on 30 May 1966.
The spacecraft carried a set of solid-state oscillators that had been programmed to reproduce the notes of "The Internationale", so that it could be broadcast live to the 23rd Congress of the Communist Party of the Soviet Union. During a rehearsal on the night of 3 April, the playback went well, but the following morning, controllers discovered a missing note and played the previous night's tape to the assembled gathering at the Congress — claiming it was a live broadcast from the Moon.
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