April 14/15, 2023 – “(Our) Key moments in AGN research”

An informal, festive mini-symposium celebrating Peter Barthel’s 70th birthday, held April 14-15, 2023, in Groningen.

Peter Barthel was appointed full professor at the Kapteyn Institute in 2004 and Rector of the University of Groningen Pre-university Academy upon its start in 2005. He formally retired in December 2018. On that occasion, he organized a special concert in the large Oosterpoort concert hall, by the student symphony orchestra Mira, for his friends and many university colleagues. He expressed the wish to celebrate his 70th birthday during a festive event in Groningen in April 2023 with a group of invited long-time astronomer friends from all over the world, as well as with interested astronomy colleagues from Groningen and other Dutch institutes. That event, under the title “(Our) key moments in AGN research”, was indeed festive and memorable; the group photograph, taken on the Academieplein, is shown below.