Why sometimes there is no moon at night?

The moon cannot be observed for the following reasons:

Weather reasons: Visibility is reduced in foggy days, cloudy days and foggy days. The light reflected by the moon to the earth is blocked by clouds or foreign bodies in the atmosphere, so it cannot be reflected to the surface and captured by human eyes. In such weather conditions, the moon may not be seen.

Geographical reasons: Extreme day and night phenomena exist in different degrees in extreme day and night areas. When extreme solar phenomena occur, the sun always rises and does not set within 24 hours a day. When it is extremely dark, there is no trace of the sun for 24 hours a day, and it is dark all around.

Changes in the relative position of the earth and the moon: On the first day of each lunar calendar, the moon rises and sets at the same time as the sun, and the moon is covered by the sun's brilliance. People can't see the moon, but they can observe it in a special way.