The fifteenth moon, why sixteen laps? Is there any scientific basis to explain it?

Why do some people say that the moon of fifteen is a circle of sixteen? What is the basic principle of scientific rationality behind this statement? The moon keeps moving. Everyone sees more moons every day. In July and August of the lunar calendar, the side of the moon facing away from the earth shines on the sun. At this time, you can see half the moon, which is the first quarter moon. After that, the moon continued to move. When the side facing the earth is fully illuminated by the sun, what everyone sees is the child full moon, which is what we often call the child full moon. This time is 15 and 16 of the lunar calendar. After the child's full moon, the moon you see is getting smaller every day. On the 23rd day of the lunar calendar, everyone only sees half a moon in Dongwan, which is called bimonthly. At the end of the month, the moon moves between the earth and the sun, and at the beginning of the month, this cycle begins.

As the saying goes, "the moon on the fifteenth day is sixteen circles", which is also the wisdom of the ancients to observe the moon. Because the moon's rotation rate is unstable, it is fast and slow. The average rotation period is 29.53 days, and the minimum and maximum time difference is 13 hours. The time of the full moon is also different from year to year. Generally speaking, it is generally believed that the moon is the roundest on August 15th or 16th of the lunar calendar.

But the reflection surface of moonlight is different from place to place. Every month when everyone can't see the moon, it's called the full moon. However, on this day, the first full moon may appear in the morning or evening, and the duration of the lunar month itself is different. At this time, the moon is most likely to appear in the morning of 15 or in the night of 17. If the child needs 16- 17 days before the full moon, there will be 16 or even 17 moons.

15 Moon 16 yuan. Mom and Dad expect their daughter and son-in-law 16 yuan, and the East and the West are ready to accept most of them. There are thousands of things on their minds. Mid-autumn moon cakes and snacks filled the table, and the family was beaming. The moon represents my heart, and the happy family is reunited. You think the moon is a family reunion, and family reunion is round.