The solstice after winter is long, but it is still short.

After the solstice in winter, the days get longer and longer.

On the day of winter solstice, geographically, the sun moves to 270 degrees of the yellow meridian, and the sun shines directly on the tropic of Capricorn (also known as the winter solstice daily line), and the sun is most biased towards the northern hemisphere. So for people in the northern hemisphere, the days are the shortest and the nights are the longest.

The solstice in winter is also the day with the lowest sun height at noon all year round. As far as Beijing is concerned, the winter solstice is only 9 hours and 20 minutes a day, and the height of the sun is only 26 42'. 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. ?

From winter to the future, direct sunlight gradually moves northward, and the days gradually become longer until the summer solstice (the longest day in the northern hemisphere). For people in the southern hemisphere, the opposite is true. In the cold winter, they are the longest day and the shortest night in the hot summer solstice and the winter solstice in the southern hemisphere.

Extended data:

Temperature changes from winter to the future:

In winter solstice, although the height of the sun is the lowest, the sunshine time is the shortest, and the heat absorbed by the ground is less than the heat lost, the heat accumulated on the ground for a long time continues to be lost, and the temperature near the ground layer has not dropped to the lowest, so it is not the coldest time of the year.

After the winter solstice, although the days are getting longer and shorter, the days are getting shorter and shorter, and the nights are getting longer and longer in the short term. The heat absorbed by the ground every day is still less than the heat lost, so the temperature did not rise immediately. People count nine from the solstice in winter, and every nine days is a nine.

Before and after "March 9th", the area was the least hot and the weather was the coldest, so it was said that "March 9th was cold". Astronomy regards the winter solstice as the beginning of winter, which is obviously late for most parts of China. During the winter solstice, the average temperature in the western Sichuan Plateau is generally below 0℃, while the average temperature in the Sichuan Basin is only about 6℃ to 8℃.

In the low-altitude valley area of southwest Sichuan, even in the coldest local165438+ in early October, the average temperature is still above 10℃, so it can be said that autumn comes and spring comes, and there is no winter all year round.

People's Daily Online-"Winter Solstice" at 0: 28 on the 22nd: The day begins to get longer.