由于黄赤交角的存在,太阳直射点在南北回归线间往返移动,造成了一年中在同一纬度正午太阳高度的年变化。不同地方正午太阳高度年变化的幅度,因所处的纬度各异而不完全相同,但都跟黄赤交角有直接的关联。 Because of the existence of the yellow-red angle, the direct point of the sun moves back and forth between the TGR lines, resulting in annual variations in the solar altitude at midday at the same latitude during the year. The magnitude of annual change in solar noon at different places is not exactly the same due to different latitudes, but all are directly related to the angle of the yellow-red anomaly.