Edward M SionEdward Sion Ph.D., is currently Professor of Astronomy and Astrophysics at Villanova University. He has held visiting positions at Arizona State, the University of Toulouse and the Hubble Space Telescope Science Institute. He has authored 185 peer-reiewed publications, primarily on the end stages of stellar evolution. The father of two grown children, he currently resides with his wife in Radnor, PA. Read More Read Less