In summer to the sun, the extreme latitude range of the solar phenomenon is

During the summer solstice, the dimension range of extreme solar phenomena is the North Pole, which is within 66 34' north latitude, that is, the area north of the Arctic Circle.

Geographical significance of summer solstice: On June 2 1 every year, the direct point of the sun is on the tropic of cancer, with the longest day and the shortest night in all parts of the northern hemisphere. The higher the latitude of the hemisphere, the longer the day and the shorter the night, and the extreme day phenomenon appears in the Arctic Circle. The higher the latitude in the southern hemisphere, the longer the night and the shorter the day, and the polar night phenomenon appears in the Antarctic circle. The farther away from the tropic of cancer on the earth, the more inclined the sun's rays are, and the less solar heat is obtained. In contrast, the northern hemisphere gets more heat than the southern hemisphere. Generally, June, July and August are summer in the northern hemisphere and winter in the southern hemisphere. From this day on, the direct point of the sun moved south.

The solstice in summer is the turning point of the sun. After this day, I went back. The direct sunlight point moved southward from the Tropic of Cancer, and the daylight in the northern hemisphere became shorter and shorter day by day. At the same time, after the arrival of the summer solstice, the stars in the night sky gradually became summer stars.

Summer solstice is one of the 24 solar terms, which occurs on June 2 1 or 22 of the Gregorian calendar every year. On the day of the summer solstice, the sun moves to 90 degrees of the yellow meridian (in Gemini), and the position of the sun directly on the ground reaches the northernmost point of the year, almost directly on the tropic of cancer. At this time, the sunshine time is the longest in the northern hemisphere. In Beijing, the daytime can be as long as 15 hours. On this day, the northern hemisphere gets the most sunshine, almost twice as much as the southern hemisphere.