The Big Bang and Georges Lematre : Proceedings of a Symposium in Honour of G. Lematre Fifty Years after His Initiation of Big-bang Cosmology, Louvain-

ix Fully aware of the work accomplished by Mgr. Massaux, Rector of the Catholic University of Louvain who spoke about Lemattre, the University professor. Peebles, Professor of Physics at Princeton University, summarized the fundamental contributions of Lemattre to modern cosmology.