Why is the moon in Mid-Autumn Festival the roundest 400 characters?

It is said that the moon on 15 is not the roundest, but it is still bigger and rounder than usual.

The moon is unique in the sky: its light is very light and soft, with a faint cloud lining; It is so leisurely and serene; It seems to be a flawless white jade plate, but also like a mirror rising in the fairy palace, which makes people unconsciously intoxicated in its arms.

A bright moon, very quiet. I can't help but think of Li Bai's poem: "Immortals hang down their feet, and osmanthus trees circle." The white rabbit smashed the medicine. Who did you give it to? "Maybe Chang 'e is looking at the world at the moment, and the lovely Jade Rabbit is meekly lying at her feet! I naively imagined touching fairy tales.

After a while, the sky darkened and the body of the moon became Huang Chengcheng. It seems that you can vaguely see a few gray dots on it. Maybe Yutu spilled medicine. The car drove up the winding mountain road, and the moon seemed to become lively. She runs and jumps so fast that the car can't catch up with her! What new engine did Sister Chang 'e use, or is there any new energy? If so, I hope she can tell me.

Tired of chasing cars, fireworks began to chase the footsteps of the moon again. After a while, Sister Red Fireworks began to chase; After a while, the red fireworks brother followed ... one after another, so lively! But the moon chased after it and won.

Ah, the moon! August 15, you will always be the most dazzling!