While living in the center of the earth after that age, but year-round observation and calculation he completed is considered the starting point of modern astronomy book, "celestial bodies" theory, put forward the heliocentric theory

While living in geocentric said that times but was, after a perennial observer and calculated, completed a modern astronomy is regarded as the starting point of the book Running theory of celestial bodies, on the theory of the heart

But although lives in the geocentric theory time he passes through year to year observes and the computation, completed has been regarded as the modern astronomy beginning the work "Heavenly body Movement To discuss", advanced heliocentric theory's theory

Life observation and calculation in geocentric times but he after all the, completed are considered starting point modern astronomy book, celestial bodies running, the dissertation proposed a heliocentric theory of theory

While living in the center of the earth after that age, but year-round observation and calculation he completed is considered the starting point of modern astronomy book, "celestial bodies" theory, put forward the heliocentric theory