摘要
古代日月食观测记录是研究过去几千年地球自转长期变化的最有用的材料, 本文对文献记载的中国古代(明末以前)的日食观测作了分析讨论。指出,西汉以后资料是系统完整的。多为当时首都的观测记录。可惜的是,古人不重视记录天象发生的准确时刻。 作者从这些材料中筛选出13次观测地点明确的日全食观测,探讨分析了地球自转长期变化的趋势。
The ancient eclipses records are the most useful data to research the historical secular changes in the rotation of the earth.
This paper discusses and analyses the ancient Chiness solar eclipse records (before the end of Ming Dynasty) in the literature. It points out that the data after Western Han are on the whole system-complete, many of that are the observational records in the capital.It's a pity that the ancient observers did not pay attention to the accurate moments of the celestial phenomena.
The author selects thirteen total (annular) solar eclipse records with explicit places of observation from these data and probes into the tendency of the secular changes in the rotation of the earth.
