Nine Years of the Lord - Nine Years of the Lord

Japanese: 九執暦 - きゅうしつれき

This Indian astronomy book was translated and published in 718 by imperial order of Emperor Xuanzong of the Tang Dynasty in China. In ancient Indian astronomy, in addition to the seven celestial bodies in the sky (the sun, the moon, and the five stars), there were two invisible stars at the intersection of the ecliptic and the white ecliptic, and the name of this book comes from this. It was highly valued as it included a new method of calculating solar and lunar eclipses.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

中国，唐の玄宗皇帝の勅命で開元6 (718) 年に翻訳刊行されたインドの天文学書。古代インド天文学では，天に日，月，五星の7天体のほか，黄道と白道の交点に見えない二星があって，九曜としたことからきた名称。日食，月食の新しい計算法を含み，大いに珍重された。

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