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随着汉代社会经济的发展,相应地在天文、历法、算术和医学等科学技术方面也都比先秦有了很大的进步。在天文历法方面,从西汉起,已经有了日食时太阳的方位、初亏和复圆时刻、亏起方向的日食观测记录。司马迁在《史记·天官书》里,详细记录了周天的星座以及金、木、水、火、土五大行星运行的情况。汉武帝时,司马迁与天文学家唐都、落下闳等制作“太初历”,其中关于五大行星的会合周期(即连续两次和太阳相合的时间)和现代测定的数值相
With the socio-economic development of the Han Dynasty, corresponding progress has been made in science and technology in astronomy, calendar, arithmetic and medicine. In the astronomical calendar, from the Western Han Dynasty, there have been solar eclipses during the solar eclipse, the first loss and the complex round moment, the direction of loss of solar eclipse observations. Sima Qian in “Shi Ji Tian Guan Shu”, a detailed record of the constellation of the Zhou and gold, wood, water, fire, earth five planets operation. In the time of Emperor Wudi, Sima Qian and the astronomers Tangdu and Chulanjong made the “Early Tairi Calendar,” in which the meeting period of the five planets (that is, the time of two consecutive times with the sun) and the numerical value of modern measurement