1. Write the solar terms in the northern hemisphere when the earth revolves to positions A and B: A( )B (). 2, when the earth revolution to a certain position, the direct latitude of the sun is ().

1. When the earth rotates to positions A and B, write down the solar terms in the northern hemisphere: A (summer solstice) B (winter solstice).

2. When the earth revolves to position A, the latitude of direct sunlight is (23.26' n), and the Arctic Circle is extremely daytime.

3. The shortest day in Chenzhou (southern Hunan) is from the winter solstice (about 65438+February 22nd).