He is a professor at the Friedrich Schiller University of Jena and director of the Karl Schwarzschild Observatory (Thuringian State Observatory).
Karl Marx | Karl Pilkington | Karl Lagerfeld | Royal Observatory, Greenwich | Karl G. Heider | Karl Rove | Karl Pearson | Karl May | Karl Liebknecht | Karl Friedrich Schinkel | Karl Dönitz | Karl Jenkins | observatory | Royal Observatory | Paris Observatory | Palomar Observatory | Karl Stefanovic | Yerkes Observatory | Karl Bodmer | Arecibo Observatory | Siding Spring Observatory | Mount Wilson Observatory | Smithsonian Astrophysical Observatory | Observatory | Karl Wilhelm Friedrich Schlegel | Karl Malone | Harvard College Observatory | Ondřejov Observatory | Lowell Observatory | Kew Observatory |