<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> 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>
who wrote a book describing the universe with the sun in the center
who wrote a book describing the universe with the sun in the center
Nicolaus Copernicus
Nicolaus Copernicus