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moon show math great so create honor he also can |
Zu Chongzhi （425-500）was a great mathematician and astronomer（天文学家） during the Northern and Southern Dynasty（220-581）.
Zu Chongzhi's main contribution（贡献）to is the computation（计算）of pi. Records that Zu worked out the numerical value of pi -- between 3. 1415926 and 31415927. It was the achievement worldwide at that time. To Zu's great contribution to math, some foreign math historian suggested calling pi "Zu Lv（the rate of Zu）". It is surprising that Zu made the calculation（计算）even before the invention of the abacus（算盘）. he did all the work using nothing more than wooden counting sticks.
In astronomy, Zu Chongzi the Daming Calendar for the first time in China. This was an important break through in the history of Chinese calendar.
Zu was good at machine making. He invented the south-pointing bronze carriage（青铜马车）and 1000-li Boat which travel 100 li in a day.
Zu was one of the greatest Chinese mathematicians. People named a lunar crater（坑）at the back of the moon Zu Chongzhi to remember . Crater Zu Chongzhi is 28 km wide and lies about 20 degrees north of the equator（赤道）. And the planet 1888 was named "Planet Zu Chongzhi".
