About me Group Leader at the Leibniz-Institute for Astrophysics Learn more Research Satellite galaxy planes, dwarf galaxies, near-field cosmology. Learn more Publications List of peer-reviewed papers and other publications Learn more Travel Upcoming trips and talks, and a list of past presentations Learn more Photography Have a look at my street photography website 8minutesold.com external website Recent News Two new videos (in German) March 26, 2024 New article on dwarf galaxies and cosmology for “Physik in unserer Zeit” (in German) November 28, 2023 Press release for new series of papers: A Radically New View on Dwarf Galaxies November 22, 2023 Selected as one of the 100 most important minds in science in Berlin 2023 October 5, 2023 Hosting IAU Symposium 379 “Dynamical Masses of Local Group Galaxies” in Potsdam March 16, 2023 Elsewhere: Twitter BlueSky Instagram LinkedIn