Katsis Demetrios, (1911- 2001)
Astronomer, Educator (retired). He was born in Zarouchleika, Patras, Greece and received his B.Sc. in Mathematics (1934) and the Ph.D. in Astronomy (1955) from the University of Athens, Greece. He worked for 15 years as Assistant and Chief Assistant at the National Observatory of Athens, for 8 years as Chief Assistant at the Laboratory of Astronomy of the University of Athens and for 22 years as high school teacher in Athens. His scientific interests were around the Celestial Mechanics. He published many monographies on astronomical matters. He was a member of the IAU, of the Hellenic Astronomical Society (Hel.A.S.), of the Societe Astronomique de France and of the Hellenic Mathematical Society.
Researcher, NASA/Goddard Space Flight Center, U.S.A. He was born in Kavala Greece, on the 1st of May, 1950. He received the B.Sc. in Physics from the Aristotle University of Thessaloniki, Greece (1973), the M.Sc. from the University of Chicago and the Ph.D. (1978) from the same University. He has been NAS/NRC fellow and Research Associate at the University of Maryland. He has been honored with the 3rd prize of the Gravity Foundation for the best essay in Gravity (1976). His scientific interests include Cosmology, Quasar Physics and High Energy Astrophysics and he has published many scientific papers on these matters; in one of them, he showed that the dynamics of scalar fields in the early Universe could change its expansion rate in a way that could resolve the so called Horizon problem, in a process currently known as Cosmological Inflation. He is a member of the International Astronomical Union (IAU), of the American Astronomical Society, of the American Physics Society and a founding member of the Hellenic Astronomical Society (Hel.A.S.). In 2000 he was elected a Corresponding Member of the Academy of Athens, Greece.