ON May 24, 1543, died Nioolaus Copernicus. A few days previously, as he lay on his deathbed, the first printed copy of his great work, “De Revolutionibus Orbium Coalestium” , which was destined to ...

Ibn-al-shatir's lunar model from which Copernicus is reported to have borrowed in composing his cosmological model. Credit: This work is in the public domain in the United States. New research has ...