Traditional Culture Encyclopedia - The 24 Solar Terms - Look at the sketch of "Shantou Tropic of Cancer Sign Tower". It shows that the shadow of the sphere is just below. Answer the question 1-3. On this day, it is located at 80 degrees south latitude.

Look at the sketch of "Shantou Tropic of Cancer Sign Tower". It shows that the shadow of the sphere is just below. Answer the question 1-3. On this day, it is located at 80 degrees south latitude.

According to the stem, the height angle of the sun on the tropic of cancer is the largest on this day, so it can be judged that the sun is on the tropic of cancer at this time, which is the summer solstice in the northern hemisphere, and the date is around June 22. There is an extreme night phenomenon in the Antarctic circle. The length of the night is 24 hours near 80 degrees south latitude.

Therefore, choose: d.