Geography of autumnal equinox solar terms

The first picture: the top position is the autumnal equinox; The position on the left is the winter solstice, the lowest position is the vernal equinox, and the position on the right is the summer solstice.

The earth's axis leans to the left, and the extreme day appears near the south pole of the left earth and near the north pole of the right earth.

The second picture: no. The revolution of the earth is counterclockwise.

The third picture: the top position is the vernal equinox; The position on the left is the summer solstice, the lowest position is the autumn equinox, and the position on the right is the winter solstice.

The earth's axis tilts to the right, and the extreme day appears near the north pole of the left earth and the south pole of the right earth.

Picture 4:No.. The revolution of the earth is counterclockwise.

Summer is the season with the longest day and the highest sun at noon. Starting from beginning of spring (February 4th or 5th), Changxia (May 5th or 6th), beginning of autumn (August 7th or 8th) and beginning of winter (165438+1October 7th or 8th) among the 24 solar terms. The movement of the earth in the orbit of revolution will produce regular changes in weather and seasons, and farmers in traditional agriculture will carry out agricultural production accordingly, just like the proverb "Grain Rain planted melons and beans before and after". ?

The distribution of noon sun height with latitude is as follows: low latitude is large, high latitude is small, and the spring and autumn equinox decreases from equator to poles; In summer solstice, it decreases from the tropic of cancer to the north and south sides; In winter solstice, it decreases from the tropic of Capricorn to the north and south sides.

The seasonal variation is: north of the Tropic of Cancer, the height of the sun reaches the maximum from summer to noon, and reaches the minimum from winter to noon. South of the Tropic of Capricorn is the opposite. Between the Tropic of Cancer, there is direct sunlight twice a year.