Aristarchus had more than 200 years earlier come up with a heliocentric model of the solar system .
阿里斯塔克斯（aristarchus）比托勒密早两百多年提出了太阳系日心说理论。
" The earliest known astronomer to recognize and assess the movement of precession was aristarchus of samos , who lived around 280 b.c. , " rao told livescience .
