George V. Coyne, Ph.D., S.J., is a Jesuit priest, distinguished astronomer, director of the Vatican Observatory, and head of the Observatory's research group which is based at the University of Arizona in Tucson. Parallel to his scientific research he has developed an interest in the history and philosophy of science and in the relationship between science and religion. In 2008 he received the Mendel Medal. Alessandro Omizzolo is a member of the research staff at the Vatican Observatory with a special interest in quasars. He resides in Padua, Italy.