May 25, 1997 April 19 (Landmarks), International named "Chen Ning Yang Star. May

1997 25 (lssdjt.cn), Chinese Academy of Sciences and the Jiangsu Provincial People's Government announced that the International Minor Planet Center nominated reporting, according to the Purple Mountain Observatory, Chinese Academy of Sciences has found the station on November 26, 1975, The international number 3421 asteroid officially named "Chen Ning Yang Star. It is reported that the star along an elliptical orbit around the sun to run, the average distance to the sun is 335 million kilometers, one revolution takes 3.34 years. In 1956, American physicist Chen Ning Yang and Li Cheng-tao, to put forward a new theory of parity violation in weak interactions, and won the 1957 Nobel Prize in Physics.