皇极历
皇极历-
汉代统治者设立了太初历，而在唐代使用皇极历，并被日本，韩国和越南引进使用。
The Han Dynasty rulers instituted the Taichu calendar , while during Tang Dynasty the Huangji calendar was introduced and it was adopted by Japan , Korea and Vietnam .
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随着社会生产的发展，隋朝的自然科学与人文艺术也有了长足的进步。如著名的天文学家刘焯制订了“皇极历”，他计算的岁差与现代计算出的准确值相差无几。
Along with the development of social production , natural science and liberal art the Sui Dynasty also made a substantial progress , such as astronomer Liu Zhuo published his " The Greatest Almanac . " He computed the year age only had a minor deviation from that of modern compute .