从北极出地设定看浑天说与希腊宇宙论之相应内容

Huntianshuo and Its Counterpart in Greek Cosmology: an Analysis on Arctic Circle

通过系统整理对照古代中国、希腊的"固定北极出地传统",发现前者看似简单却无法理解;后者演变繁复但理路清楚。正是在希腊的这一传统牢固确立的后期,该参数作为新生的浑天说的一项基本特征突然现身中土天学,而它完全不像在希腊那样有来龙去脉可循。面对这一难题及其他疑点,"避免特设性假定"的要求使得"外来说"比"本土起源说"更有说服力。

By collating and contrasting tradition of fixed height for northern celestial pole systematically in both ancient China and Greece, it is discovered that the former seems simple yet incomprehensible while the latter, though complicatedly evolved, can be traced clearly with reason. It was just in later 300 years period in which the tradition was firmly established in Greece, that the parameter suddenly appeared in Chinese astronomy as an unchangeable basic character of newly created theory of huntianshuo（ 浑天说）, unlike its counterpart in Greece, totally without any traceable origin and development. As to this challenge among other doubts, the requirement of avoiding ad hoe assumptions make theory of Introduction from Outside a more convincing construction than Locally Origination.