Liquid H2O is a major requirement for the existence of life. Therefore, first people have to study about the possibilities of liquid water on the moon. For the existence of liquid water, there should considerable pressure that is greater than the critical pressure of the liquid water. Moreover, the temperature should obey the above condition. We know that the moon’s atmosphere doesn’t contain considerable air molecule density. Because the moon’s gravitational field hasn’t any capability to catch the escaping air molecules from the moon’s atmosphere. Therefore, usually, scientists may argue that there won’t any considerable atmospheric pressure in order to keep the air pressure that is greater than the critical air pressure for the existence of liquid water on the surface of the moon. But, if the moon’s gravitational field is considerably large on some specific region on its surface, then there may a possibility for the existence of liquid water. But, in order to verify that without any doubt, scientists have to study the absorption and emission spectra of those regions using the highly sensitive scientific equipment.
The chemical compounds on that high gravity area on the surface of the moon may influence for that unusual physical feature of the surface of the moon. Especially, not only the liquid water, O2 and sufficient temperature needs for the fine existence of life on the moon. We know through the solar wind, there is a large number of high-energy charged particles are coming towards the Earth from the sun. Also, the Ultra-Violet waves come towards the Earth from the sun those are harmful to life on Earth. But, the Earth’s magnetic field and the Earth’s O3 contents have abled to ignore or reduce the damage due to those rays for the mankind. But the moon hasn’t any strong magnetic field that is capable to turn-off or catches those solar wind particles those are coming towards the moon. Moreover, the moon hasn’t enough atmosphere air molecule density that is capable of reducing the harmful effects due to Ultra-Violet rays coming from the sun.
But, according to my own argument, if scientists able to place some asteroid in an orbit around the moon (That placing asteroid should contain some kind of living bacteria. i.e. there should be a capable environment on the surface of that asteroid for the existence of those lives), then in future, the environment of the surface of the moon would help more for any life forms on the surface of the moon. Because the growth of the bacteria would release several useful chemical compounds those are essential for the growth of the life on the moon.