Traditional Culture Encyclopedia - The 24 Solar Terms - Geographical revolutionary solar terms
Geographical revolutionary solar terms
(2) When the earth revolves around the sun, the direct point of the sun's rays regularly moves between the tropic of cancer in a year, which leads to the change of the four seasons and the change of the sun's altitude angle at noon;
According to the chart, a is the autumnal equinox; B is the winter solstice; C is the vernal equinox; D is the summer solstice;
(3) National Day (65438+1 October1) revolves around AB; When the sun shines directly at the equator, (a) the autumn equinox in the northern hemisphere (around September 23rd); When the sun shines directly on the tropic of Capricorn (b) is the winter solstice in the northern hemisphere;
As shown in the figure:?
(4) When the earth revolves to position B, the latitude of direct sunlight is tropic of Capricorn, at which time the day is the shortest and the night is the longest in the northern hemisphere; There is an extreme night phenomenon in the Arctic Circle; It's summer in Australia;
(5) When the earth revolves around AB, the days become shorter and the nights become longer; In the northern hemisphere, the days are short and the nights are long.
(6) Due to the revolution of the earth, the temperate zone has obvious seasonal changes.
So the answer is: (1)(2) autumnal equinox; Solstice of winter; Vernal equinox; Summer solstice; (3); (4) Tropic of Capricorn; The shortest day and the longest night; Extreme night; Summer; (5) short; Dragon; The days are short and the nights are long; (6) season.
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