2005/10/04 | 卡利普周期[Callipic Cycle]
类别(¤〖天文〗) | 评论(0) | 阅读(22) | 发表于 10:11
A lunar cycle noted by Callippus in 325 BC which included 4 19-year Metonic cycles. The 940 months had 29 or 30 days each, for a total of 27,759 days,
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