Vernal equinox solar terms letter

(1) winter solstice and vernal equinox, summer solstice and autumn equinox

(2) 65438+February 22nd? (3)? 12 hour

(4)? C(5)C？ (6) North

(1) According to the revolution position of the earth, it is known that A- winter solstice, B- vernal equinox, C- summer solstice and D- autumn equinox. ②A—— winter solstice, the time is about 65438+February 22nd. (3)B is the vernal equinox, with equal day and night, and the time is 12 hours. (4) The revolution speed of the earth is slow near perihelion and fast near perihelion. (5) During the summer solstice, there is extreme sunlight in the Arctic Circle. (6)A is the solstice in winter and C is the solstice in summer. From the solstice in winter to the solstice in summer, the direct point is from the Tropic of Cancer to the Tropic of Cancer.