Here, near the equator, scientists can study all of the Northern Celestial Hemisphere and part of the Southern.
在靠近赤道的此处，科学家可以好好地研究整个北半球及部分的南半球。
2
The March equinox occurs the moment the sun crosses the celestialequator – the imaginary line in the sky above the Earth's equator – from south to north.
三月春分发生的那一刻，太阳越过天球赤道 - 假想一条线在地球赤道上方的天空 – 贯穿南北。
3
The sphere , which was marked with stars , the celestialequator and the ecliptic , was mainly used to show the positions of celestial objects at different times.