As the Sun crosses the celestial equator heading south, spring begins in the southern hemisphere and autumn in the north.
当太阳在天赤道上掉头向南的时候，南半球的春天开始而北半球则是秋天。
The sphere , which was marked with stars , the celestial equator and the ecliptic , was mainly used to show the positions of celestial objects at different times.
这仪器又称浑象，球上刻有星宿赤道黄道等，主要是用来显示天体在不同时间的位置。
The sphere , which was marked with stars , the celestial equator and the ecliptic , was mainly used to show the positions of celestial objects at different times.
这仪器又称浑象，球上刻有星宿赤道黄道等，主要是用来显示天体在不同时间的位置。
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