The results of scientific exploration of the moon clearly tell mankind that the atmosphere on the moon is extremely thin, about one trillion times that on the earth, which means that there is actually no air on the surface of the moon.
In fact, it is not only the moon that has no atmosphere. Among the more than 60 satellites in the solar system, except Saturn's sixth satellite ("Saturn -6") and Neptune's first satellite ("Triton- 1"), all the other satellites have no atmosphere. The modern solar system and its stellar evolution theory clearly tell us that the atmospheric density of the moon at a certain stage in the past must be much higher than it is now.
Extended data:
The earth and the moon revolve around each other, and the two celestial bodies revolve around the center of gravity under the surface 1600 km. The birth of the moon has added many new things to the earth.
While the moon revolves around the earth, its special gravity attracts the water on the earth and moves with it, forming tides. Tides helped the early aquatic life of the earth to land.
A long time ago, the temperature difference between day and night was large, and the temperature was between the boiling point and freezing point of water, which was not suitable for human habitation. However, due to its special influence, the attraction of the moon to the earth's seawater slows down the earth's rotation, makes the earth's rotation and period of revolution more reasonable, brings us precious four seasons, and reduces the temperature difference, thus making it suitable for human habitation.
The reason why the earth sees half the moon is because the rotation period of the moon is exactly equal to period of revolution. Is this coincidence or is there an internal connection? Let's look at the moons of other planets in the solar system. We can find that the rotation period of most satellites is strictly equal to period of revolution. There seems to be an internal connection between the two.
People's Network-Why is there no air on the moon?