Dr. Rovithis was born in Crete, Greece, on January 2, 1938 and passed away in Athens on March 11, 2020. He received his B.Sc. in Mathematics from the Athens University, Greece, (1963), and his Ph.D., from the same University (1976). He joined for three months as Visiting Research Fellow the Univ. of Manchester and the Haute Province Observatory. He has worked as Assistant at the Univ. of Athens, Greece (1960-1963), Astronomer at the Athens Planetarium of Eugenides Foundation (1967-1971), Assistant and Chief Assistant of the Astronomical Institute, of the National Observatory of Athens (NOA), Researcher, Chief Researcher of the same Institute, and in charge of the Kryonerion Station of NOA (1994-2001). He retired in 2001 and became Emeritus Chief Researcher, at then Institute of Astronomy and Astrophysics. His areas of expertise and research interests included Observational Astrophysics and in particular the sun, diffuse nebulae, SN remnants, photometric and spectroscopic observations of variable stars such as CVs, eclipsing binaries and symbiotic stars. On these subjects he has published many scientific papers as well as 5 monographs and a large number of popular articles in Greek. He was also interested in the history of the astronomy and has written 8 popular books on various subjects. He has been permanent fellow in two popular scientific journals, of the encyclopaedia YDRIA. Moreover, for many years he was presenting all important observational events during the year in the Journal Uranus, published by the Society for Space and Astronomy at Volos, in which he was also an honorary member. He was member of IAU and founding member of the Hellenic Astronomical Society.
Assistant Professor (retired), Department of Physics, University of Athens, Greece, (since 1986). She was born in Serifos, Cyclades, Greece. She received her B.Sc. in Mathematics from the University of Athens, Greece (1969), her M.Sc. (1974), and her Ph.D. (1976), both from the Victoria University of Manchester. She has worked as Teaching Assistant in the Astronomical Laboratory at the University of Patras. (1970- 1973) and at the University of Athens (1974-1978) and as Chief Assistant in the latter (1978-1982). She became Lecturer in 1982 and Assistant Professor in 1986 at the Department of Physics of the University of Athens. Her scientific and research interests are both theoretical and observational. The first include Stellar Structure and Evolution of Binary Stars, and the latter ground based and satellite Photometric and Spectroscopic Observations of various types of variable stars, like eclipsing binaries, CVs, symbiotics, pulsating. On these subjects she has published about 230 papers. Moreover, she has published, in Greek, 20 scientific and a number of popular articles, while she is interested in the History and Education of Astronomy. Moreover, she has authored or co-authored Lecture Notes and Laboratory Exercises and edited the Proceedings of an International Astronomical Meeting.