Santiago Ramón y Cajal Calippus Robert Curry Cameron Campanus of Novara Annie Jump Cannon Francesco Capuano di Manfredonia Francesco Carlini Paolo Casati Miguel A. Catalán Saint Catherine of Alexandria Augustin Louis Cauchy Bonaventura Cavalieri Henry Cavendish Arthur Cayley Anders Celsius Jean Chacornac James Challis Temple Chevallier Franceso degli Stabili Cichus Rudolf Clausius Christopher Clavius Cleostratus Agnes Mary Clerke Edward Uhler Condon Marquis de Condorcet Conon of Samos Nicolaus Copernicus Gerty Theresa Cori Cristóbal Acosta Peter Crüger Ctesibius