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The question on presence on the atmosphere Moon is rather important. Supervision over coverings of stars the Moon, conducted regularly in many observatories in past, and also other researches with obviousness understood that on the Moon aren't present some appreciable atmosphere. However on the base of the polarimetric analysis of the lunar horns the Soviet astronomer Yu.N. Lipsky considered that on the Moon there is the gas atmosphere which weight on area unit makes 1/10 000 those which is available on the Earth. E. Opik (Ireland), proceeding from other reasons, finds, that the weight of lunar atmosphere over area unit corresponds 1/230 000 terrestrial. If to accept this value it will appear that pressure and density at the Moon surface at least in 1 300000 times is less than gas, than on the Earth.