Asatellite circles the moon at a distance above its surface equal to 2 times the radius of the moon. the acceleration due to gravity of the satellite, as compared to the acceleration due to gravity on the surface of the moon is

The orbit is a circle whose radius is 3 times the radius of the surface
(both measured from the center of the moon). So the acceleration due
to gravity at the orbital altitude is

                          1/3² = 1/9 = 11.1% of its value on the surface.

Gas is all around us which means that the atmosphere