On ecliptic measurements and their astronomical implications during the Han Dynasties
关于汉代的黄道坐标测量及其天文学意义

The planet Venus traced a perfect pentacle across the ecliptic sky every eight years.
金星每八年在空中的运行轨迹正是一个正五角形。

The other point of intersection of equator and the ecliptic is called the Autumnal Equinox.
赤道和黄道得另一个相交点叫作秋分点。

A small periodic motion of the celestial pole of Earth with respect to the pole of the ecliptic.
章动地球天极就黄道极而言的小的周期性转动

either half of the celestial sphere as divided by the ecliptic,the celestial equator,or the horizon
半天球，被黄道，天赤道或地平圈分成两半的天球的一半

Either of two diametrically opposite points at which the orbit of a planet intersects the ecliptic.
交点行星的轨道与黄道相交的完全相对的两点中任何一点

Either of two points on the celestial sphere at which the ecliptic intersects the celestial equator.
二分点在天球上天赤道与黄道相切的两点中的任一点。

A Comparison of some Problems about the Observation and Calculation of the Angle between Ecliptic and Equator in Ancient China and Greece
古代中西黄赤交角测量和计算中几个问题的比较