Qiqihar solar terms

(1) In the picture, extreme days appear in the Arctic Circle and its northern region, which is the summer solstice in the northern hemisphere. The sun shines directly on the Tropic of Cancer on June 22nd. Point A is located in the Antarctic circle, and the polar night occurs in the Antarctic circle and its south area. Point A is 0 hours long, point B is located at the equator, divided equally between day and night, with a day length of 12 hours, and the latitude of point C is 8 squares.

(2) According to the direction of the earth's rotation, the morning line is from night to day; The rotation linear velocity decreases gradually from the equator to the north and south sides, and the maximum rotation linear velocity of A, B and C is B; On the summer solstice, the northern hemisphere has long days and short nights, the longest days and the shortest nights. The tropic of cancer and its north noon sun height reaches the maximum in a year, and the noon shadow length reaches the minimum in a year.

So the answer is:

Summer solstice? June 22nd? 23 degrees and 26 minutes north latitude? 0 12? 16

(2) The morning B-line has long days and short nights (or "the longest days and the shortest nights").