<P> Heliocentrism, or heliocentricism, is the astronomical model in which the Earth and planets revolve around a relatively stationary Sun at the center of our Solar System . The word comes from the Greek (ἥλιος helios "sun" and κέντρον kentron "center"). </P> <P> The notion that the Earth revolves around the Sun had been proposed as early as the 3rd century BCE by Aristarchus of Samos, but had received no support from most other ancient astronomers . </P> <P> Nicolaus Copernicus' major theory of a heliocentric model was published in De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres), in 1543, the year of his death, though he had formulated the theory several decades earlier . Copernicus' ideas were not immediately accepted, but they did begin a paradigm shift away from the Ptolemaic geocentric model to a heliocentric model . The Copernican revolution, as this paradigm shift would come to be called, would last until Isaac Newton's work over a century later . </P> <P> Johannes Kepler published his first two laws about planetary motion in 1609, having found them by analyzing the astronomical observations of Tycho Brahe . Kepler's third law was published in 1619 . The first law was "The orbit of every planet is an ellipse with the Sun at one of the two foci ." </P>

Who wrote a book describing the universe with the sun in the center