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今年12月21日是冬至,你是否知道冬至是什么意思?二十四节气又是怎么回事?南北回归线是什么意思咱们居住的地球在自转的同时还绕着太阳公转。由于地球的自转轴与公转的轨道平面始终有一个66°34′的夹角,所以,地球总是斜着身子绕太阳旋转。这意味着,地球有时是北半球倾向太阳,有时又是南半球倾向太阳,因此,太阳光直射地球的位置会随时间而南北移动。“夏至”这一天,太阳光直射在北纬23°26′的纬线上。过了夏至,太阳光逐渐南移,
December 21 this year, the solstice, do you know the meaning of the solstice? Twenty-four solar terms is what happened? What is the meaning of the Tropic of Cancer What we live in the rotation around the sun at the same time orbit. Since the earth’s axis of rotation always has an angle of 66 ° 34 ° with the orbiting plane of the orbit, the Earth is always tilted about the sun. This means that the Earth is sometimes the Northern Hemisphere, which tends to the Sun and sometimes the Southern Hemisphere to the Sun, so that the direct sunlight can change its position north-south over time. “Summer Solstice ” day, the direct sunlight at latitude 23 degrees 26 ’latitude. After the summer solstice, the sun gradually moved south,