Atenas (Grecia) - Fevereiro 25-26, 2021
Terminado em 26 de Fevereiro, 2021. En cooperaçao com the Philekpaideftiki Etaireia, the National Astronomical Committee, the Hellenic Astronomical Society, the Institute for Astronomy Astrophysics, Space Applications and Remote Sensing of the National of Observatory of Athens, and the Institute of Astrophysics of the Foundation for Research and Technology - Hellas.