IHNS OpenIR  > 中国古代科技史
黎耕; 孙小淳
Source Publication中国科技史杂志


Other AbstractMeasuring the length of gnomon shadow was one of the fundamental astronomical measurements in ancient China. In this paper we made a systematic analysis of gnomon shadow lengths for the twenty-four solar terms from Han to Tang dynasties. In doing this we discovered that these data featured two types. One type of data shows that they were not based on actual measurement, but were derived from the lengths for winter solstice and summer solstice by means of linear interpolation. The other type of data shows curved increase and decrease that matches closely to actual values for the twenty four solar terms. The first type of data appeared in the Zhou Bi and the apocalyptic book on the Book of Changes, while the second type of data appeared in astronomical treatises some time later. This change is remarkable because it might have signified the transition in cosmological theory from gai tian ( covering sky) to hun tian ( celestial sphere) during the period from the first century B.C. to the second century A. D.
Keyword汉代 晷影 盖天说 浑天说
Subject Area天文学史
Funding Organization中国科学院知识创新工程重要方向项目
Document Type期刊论文
Recommended Citation
GB/T 7714
黎耕,孙小淳. 汉唐之际的表影测量与浑盖转变[J]. 中国科技史杂志,2009,30(1):120-131.
APA 黎耕,&孙小淳.(2009).汉唐之际的表影测量与浑盖转变.中国科技史杂志,30(1),120-131.
MLA 黎耕,et al."汉唐之际的表影测量与浑盖转变".中国科技史杂志 30.1(2009):120-131.
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