在我国南北朝时代,南朝有个数学家、天文学家和物理学家,叫祖冲之。他特别爱好研究数学,也喜欢研究天文历法。由于我国历代都十分重视历法的研究,因此到南朝时历法已经有了很大进步,但是祖冲之认为还不够精确。他根据自己长期观察的结果,创制出一部新的历法,叫做“大明历”。这种历法测定的每一回归年 In our times of Northern and Southern Dynasties, there was a mathematician, astronomer and physicist in the Southern Dynasties called Zu Chongzhi. He is especially interested in math, and likes to study astronomical calendar. As the history of our country have attached great importance to the study of the calendar, so when the Southern calendar calendar has made great progress, but Zu Chong think it is not precise enough. Based on the results of his long-term observation, he created a new calendar called “Daming Calendar.” This calendar measures each regression year