Why moon has no atmosphere?

Why the moon has no atmosphere ?

Determine the escape speed of Moon. Given, the radius of Moon is 1.74 xx 10^(6) m , its mass is 7.36 xx 10^(22) kg . Does your answer throw light on why the moon has no atmosphere? G = 6.67 xx 10^(-11) n m^(2) kg^(-2) .

Escape velocity from the surface of moon is less than that from the surface of earth because the moon has no atmosphere while earth has a very dense one.

Escape velocity from the surface of moon is less than that from the surface of earth because the moon has no atmosphere while earth has a very dense one.

Why does moon have no atmosphere?

moon has no atmosphere. why?

Why does Moon have no atmosphere'?