根据中国古代天文学，紫微星被其它28个星星环绕，这意味着它是天空的中心。
According to ancient Chinese astronomy, the ziwei star was surrounded by 28 other stars, meaning it was the heart of the sky.
他是研究中国古代天文学文献的专家。
He was an expert on ancient Chinese astronomical literature.
公元185年，中国古代天文学家在《后汉书》中记录了出现在夜空中的一颗被称为“客星”的星体，这颗星体存活了大概8个月。
Chinese astronomers in the year 185 C.E. recorded in the Book of the Later Han the appearance of a "guest star" in the night sky, which remained there for about 8 months.
计算月亮的白道经度，是中国古代数理天文学之月亮运动理论的核心内容之一。
A main aim of the lunar motion theory in ancient China is to calculate the longitude of the Moon at the lunar orbit at any given time.
通过对中国古代平面星图画法的研究，认为中国古代的天文学家在绘制星图时并未采用西方投影几何方法。
This paper think the Chinese ancient astronomer did not use the western projective in the course of drawing star map, on the contrany, they have their own personality methods.
通过对中国古代平面星图画法的研究，认为中国古代的天文学家在绘制星图时并未采用西方投影几何方法。
This paper think the Chinese ancient astronomer did not use the western projective in the course of drawing star map, on the contrany, they have their own personality methods.
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