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Luna 11 was launched towards the Moon from an earth-orbiting platform and entered lunar orbit on
August 28, 1966. The objectives of the mission included the study of: (1) lunar gamma- and X-ray
emissions in order to determine the Moon's chemical composition; (2) lunar gravitational anomalies;
(3) the concentration of meteorite streams near the Moon; and, (4) the intensity of hard corpuscular
radiation near the Moon. A total of 137 radio transmissions and 277 orbits of the Moon were completed
before the batteries failed on October 1, 1966.
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