De Revolutionibus Orbium Coelestium – On the Revolutions of the Heavenly Spheres by Nicolaus Copernicus. I can readily imagine, Holy Father, that as soon as some people hear that in this volume, which I have written about the revolutions of the spheres of the universe, I ascribe certain motions to the terrestrial globe, they will […]

Several years ago there was published in Rome a salutary edict which, in order to obviaie the dangerous tendencies of our present age, imposed a seasonable silence upon the Pythagorean opinion that the earth moves There were those who impudently asserted that this decree had its origin not injudicious inquire, but in passion none too […]

Considering (Most Serene Prince) that the publishing this present Treatise, of so different an Argument from that which many expect, and which according to the intentions I proposed in my [A] Astronomicall Advisor, I should before this time have put forth, might peradventure make some thinke, either that I had wholly relinquished my farther imployment […]