张衡
Similar to Han dynasty polymath contemporary Zhang Heng (78–139) and Chinese scholars before him, Wang discussed theories about the causation of eclipses, with solar eclipse and lunar eclipse. However, Wang Chong's theory went against the correct 'radiating influence' theory supported by Zhang Heng (that the light of the rounded moon was simply a reflection of the light emanating from the rounded sun). Writing little more than a century before Zhang Heng, the mathematician and music theorist Jing Fang (78–37 BC) wrote in the 1st century BC: