What kind of astronomical phenomenon is "the moon and stars are scarce"?

First of all, we should know that the moon is the satellite of our earth, which is closest to the earth, and the stars are far away from the earth, most of which are measured in light years. At the same time, the volume of stars is much larger than that of the moon. But when we look at the stars and the moon from the earth, we all think that the moon is bright and big. The starlight of the stars is far away and weak, which covers the starlight of other stars under the unique natural conditions of the moon, plus a series of awnings.

From an astronomical point of view, the brightness of the stars is graded, and the grade of the moon is far greater than that of the stars.