Today, the Vatican Observatory honors Monsignor Georges Lemaître, a Jesuit educated Catholic Priest, astronomer and professor of physics who first proposed the theory of the expanding universe, widely misattributed to Edwin Hubble. Father Lemaître was the first to propose what is now known as Hubble's Law and made the first estimation of what is now called the Hubble Constant, which he published 2 years before Hubble's article. Lemaître also proposed what became known as the Big Bang theory, which he called his "hypothesis of the primeval atom" or the "Cosmic Egg".
