Question

There is no atmosphere on the moon because​

Answer 1

Answer:

The escape velocity on the surface of moon is lesser than the RMS velocity of the molecules of gas at the surface temperature of moon. Therefore, the gas molecules escape and hence moon cannot hold an atmosphere

Explanation:

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Answer 2

ANSWER...

The moon doesn't have an atmosphere because the magnetic field is weak on the surface of the moon. Since the surface of the moon doesn't absorb a measurable quantity of radiation the gas molecules are lost into space. The surroundings of the moon are vacuum.