Xenophon Moussas is a retired Professor of Space Physics, at the Faculty of Physics, National and Kapodistrian University of Athens. Xenophon's current projects are: 1) 'Antikythera Mechanism', the oldest computer, history and Philosophy, Greek Astronomy and Astrophysics, history of Optics, ancient lenses, 2) Space Physics, Solar Physics, Solar radio spectrograph j.-L. Steinberg-ARTEMIS, STEREO, WIND spacecraft/NASA, Solar Orbiter/ESA xmoussas@phys.uoa.gr xdmoussas@gmail.com tel+306978792891