2021 Colloquium of the WG (version 2) https://www.astronomische-gesellschaft.de/en/working-groups/history-of-astronomy/news/2021-coll-v2/view https://www.astronomische-gesellschaft.de/logo.png 2021 Colloquium of the WG (version 2) 2021 Programm Kolloquium.pdf — 4.8 KB