On the surface of the moon, why is there a big temperature difference between day and night?

1. The moon is always in motion. When it revolves around the earth, it also rotates. The moon's rotation period is equal to period of revolution, that is, 1: 1, and the time for the moon to go around the earth is the rotation period. This strange rotation of the moon always leads to the moon facing the earth with the same half, so one side is always day and the other side is always night.

2. The gravity on the moon is only 1/6 of that of the earth, which directly leads to almost no atmospheric adsorption on the moon. Therefore, it is impossible to talk about the thermal insulation effect of atmospheric reverse radiation. The specific reason is the same as upstairs. The data show that during the day, the temperature of the place where the sun shines vertically is as high as127.25℃; The temperature at night can be as low as-183.75℃.

3. The heat capacity and thermal conductivity of lunar materials are very low.