Emeritus Professor, Department of Physics, Aristotle University of Thessaloniki, Greece. He was born in Drama, Greece, on the 20th of June, 1935. He received the B.Sc. in Mathematics from the University of Athens, Greece (1957), the M.Sc. in Celestial Mechanics from the Yale University, U.S.A. (1964) and the Ph.D. in Astronomy from the University of Thessaloniki, Greece (1966). He worked as Chief Assistant, Docent and Assistant Professor (1973) at this University before he was elected there as Professor of Theoretical Mechanics (1982). His scientific interests include the General and the restricted three-body problem, the inverse problem of Dynamics and the Integrability questions. He has published more than 70 scientific papers in refereed journals and 10 papers in conference proceedings and special volumes / books. He has also published four textbooks (“Spherical Astronomy”, “General Mathematics”, “Differential Equations and Applications” and “Problems of Theoretical Mechanics”) and co-authored another 4 textbooks (“Introduction to Continuum Mechanics”, “Problems of Differential Equations”, “Exercises in Astronomy” and “Elements of Spherical Astronomy and Celestial Mechanics”).