At the Center of All Things
It was around 150 years after the birth of Christ that the Alexandrian astronomer Ptolemy determined that the earth must be at the center of the universe. If the earth was at the center, then the sun and the moon and the stars and the planets must orbit around it. Though many people had observed and assumed such geocentrism in the centuries prior, it was Ptolemy who standardized the view and who proved it to the satisfaction of very nearly …