When is the biggest moon in Mid-Autumn Festival this year?
On the fifteenth and sixteenth day of the lunar calendar, the moon turns to the other side of the earth, that is, the longitude difference 180. At this time, the earth is between the sun and the moon, and the half moon illuminated by the sun is just facing the earth. At this time, the moon in the sky is full moon. Because the moon is just opposite to the sun, the sun sets in the west and the moon rises in the east. When the moon sets, the sun rises in the east, and you can see the bright moon all night.
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In the lunar calendar, there must be a full moon around 15 every month. Therefore, the fifteenth day of the first lunar month is called the "full moon". The full moon is often the object of appreciation, and there have been activities to enjoy the moon since ancient times. Especially in autumn, the full moon is very beautiful, and August 15th of the lunar calendar becomes the Mid-Autumn Festival. China? Japan? South Korea and other places have special activities to enjoy the moon. There are countless literary works on this theme.
In summer, you can see that most parts of China rise from the southeast and cross the southern night sky at low altitude. In winter, the full moon in the middle of the south is higher in the night sky. Equinox? The autumnal equinox rises near due east and sets near due west.