Solar term orbit

(1) The continuous 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 According to the chart, A is the summer solstice; B is the autumn equinox; C is the solstice of winter; D is the vernal equinox;

(3) When the sun shines directly at the equator, it is at the position of vernal equinox (about 2 1 March) or autumnal equinox -C (about September 23rd) in the northern hemisphere, and the world is equally divided day and night;

When the sun shines directly on the Tropic of Cancer (position A), it is the summer solstice in the northern hemisphere (around June 22); In the northern hemisphere, the days are long and the nights are short.

When the sun shines directly on the tropic of Capricorn, it is the winter solstice in the northern hemisphere (around 65438+February 22).

So the answer is: (1); (2) Summer solstice; Autumnal equinox; Solstice of winter; Vernal equinox; (3) Around June 22nd; Tropic of Cancer; The days are long and the nights are short; Autumnal equinox; Equator; Divide day and night equally.