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Tianji

明·万民英 · Chapter 1115 / 1491

卷23·总龟条议

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Chapter 1115 of 1491

按金鸡呈瑞条解言尧历仲春日躔于昴。青龙用事条言:绍兴戊辰岁星在秦州,于历算俱不相合。今以岁差考之,毎年差一分五十秒,七十年差一度。馀尧历立春日在箕四度,于今有三千五百年,差得五十度。今授时历:孟春日在虚,一无不□合,则尧时仲春日在午初度明矣。今曰尧历仲春日在昴宿,不知如何算也。岁星历算,大约卯年俱从卯起,逆算十二辰而一周天,故谓之岁。以今历考之,虽留逆不同,然亦只差来往一宫耳。今曰戊辰岁星在秦州,则差七宫,亦不知如何算也。意者古今历算有不同,欤至如合璧,以三合为说华。盖以十二星配太阴,所行恐或非也。书此以俟后之知者。

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卷23·总龟条议 · 星学大成 · 天机 Tianji