但是精确的现代天文计算却找不到对应的事件。
However, the precise modern astronomical computation did not find its exact equivalent.
研究途径主要有两条：1）根据古代天象记录，通过现代天文计算推定其年代；
There are chiefly two research ways as: (1) Calculating the astronomical phenomena in the records of ancient literature by new method in astronomy, the collect years could be elected.
计算这个角度可以让天文学家测量地球到太阳的距离，这是当时的终极目标。
Calculating this angle would allow astronomers to measure what was then the ultimate goal: the distance of the Earth from the Sun.
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