Athens (Greece) - February 25th-26th, 2021
Completed on 26th February, 2021. In cooperation with 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.