1. Prof. Acad. Emmanuel Sarris, Space Research Laboratory, Democritus University of Thrace, invited talk on "The Earth's Space Environment"

2. Dr. Thanasis Economou, Senior Scientist, Laboratory for Astrophysics and Space Research, Enrico Fermi Institute, University of Chicago, invited talk on "50 years from Sputnik - 50 years of Space Exploration: Reminiscences of someone who was there almost from the very beginning"