Hand-made solar terms around the earth

(1) The constant rotation of the earth around the sun is called the revolution of the earth, and the direction of revolution is from west to east.

(2) It can be seen from the schematic diagram of the earth's revolution that when the earth is in position A, the latitude of direct sunlight is the tropic of Capricorn, that is, the winter solstice in the northern hemisphere, and the date is around 65438+February 22. The length of day and night in the northern hemisphere is: the day is short, the night is long, and there is an extreme night phenomenon in the Arctic Circle.

(3) When the earth revolves around B, the latitude of direct sunlight is the equator, which is vernal equinox in the northern hemisphere. At this time, the global day and night are equal in length.

So the answer is: (1)

(2) 65438+February 22nd; Tropic of Capricorn; The days are short and the nights are long; Extreme night; (3) Equal division of day and night; Spring Equinox