Nicolaus Copernicus began writing De Revolutionibus in 1506 , and finished in 1530 .
De Revolutionibus Orbium Coelestium ( On the Revolution of the Heavenly Spheres ) .
Nicolaus Copernicus began writing On the Revolution of the Heavenly Spheres   in 1506 , and finished in 1530 .
De Revolutionibus Orbium Coelestium ( On the Revolution of the Heavenly Spheres ) .