The winter school of #Astrophysics for children of 5th & 6th grade, organized for 3 Sundays by the visitor center (Κέντρα Επισκεπτών Εθνικού Αστεροσκοπείου Αθηνών ) of the National Observatory of Athens (Εθνικόν Αστεροσκοπείον Αθηνών ) and AHEAD2020 has just started!

This journey begins in the visible and relatively small-scale world of our planets and Sun and, using the stars as a bridge, extends to our galaxy and the rest of the vast world of galaxies, tracing the fascinating and invisible universe of X-rays, but also of enigmatic black holes.