What does the winter solstice mean?

Winter solstice, also known as winter festival, Asian New Year Festival and Long Day Festival, has both natural and humanistic connotations. It is not only an important solar term among the 24 solar terms, but also a traditional folk festival in China. The bucket refers to the winter solstice, that is, the solar calendar reaches 270, which will be on the Gregorian calendar 65438+February 2 1-23. Winter solstice is one of the eight festivals in a year. In ancient times, there was a custom of "eight festivals" to worship the gods and ancestors.

Winter solstice is regarded as a big holiday in winter. There is a folk saying that winter solstice is as big as a year, so the ancients called it "sub-year" or "off-year". In some coastal areas of southern China, the traditional custom of offering sacrifices to ancestors during the winter solstice is still continuing. In some areas of northern China, it is a custom to eat jiaozi every winter solstice.

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Astronomy from winter solstice;

According to modern astronomical science, during the winter solstice, the sun moves to 270 (winter solstice), and the position where the sun directly hits the ground reaches the southernmost point of the year. The sun shines almost directly on the tropic of Capricorn (also known as the winter solstice daily line), and the sun is most biased towards the northern hemisphere. Therefore, the winter solstice is the shortest day and the longest night in the northern hemisphere. The shorter the day, the longer the night.

North of the Arctic Circle, the sun is below the horizon all day, which is the widest day of the year in the northern hemisphere. For all parts of the northern hemisphere, the winter solstice is also the day with the lowest sun height at noon all year round. As far as Beijing is concerned, the daytime from winter to sunrise is only 9 hours and 20 minutes, and the height of the sun at noon is only 26 42'.

During the winter solstice, the northern hemisphere gets the least solar radiation, about 50% less than the southern hemisphere. After the winter solstice, the stars in the night sky are completely replaced by the stars in winter. From today, they will enter the ninth. At this time, the southern hemisphere is in a hot summer.

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