stars with a new photometer. The new location in the original Schlosspark was a part of the Gemeinde . The "villa settlement" of Neubabelsberg was united in 1938 with the town of to form the town of Babelsberg. Then almost straightaway in 1939 this became incorporated into Potsdam. The designation "Berlin-Babelsberg" was nevertheless retained by the observatory for a few years still. Only after 1945 was the word Berlin discarded. Ihr IAU-Code ist 536. By virtue of the nationalization of the Sonnenberg Observatory the Universitätssternwarte Berlin-Babelsberg took it on as a new department in 1931, i.e. an out-station in . Directors and other workers Other workers at the observatory included, for example, Johann Friedrich Pfaff an der alten Sternwarte, und an der neuen beispielsweise Johann Heinrich von Mädler, Gustav Spörer, Franz Friedrich Ernst Brünnow, Robert Luther, Friedrich August Theodor Winnecke, Ernst Becker, Wilhelm Oswald Lohse, Adolf Marcuse, Eugen Goldstein, Erwin Freundlich and Georg von Struve. Selected accomplishments Johann Franz Encke observed a broad variation in the brightness of the A Ring of Saturn in 1837. The Encke Division was later named in honor of his observations of Saturn's rings. Johann Gottfried Galle discovered Saturn's C-ring in 1838. Johann Gottfried Galle and his assistant Heinrich Louis d'Arrest discovered Neptune in 1846, near the position computed by Urbain Le Verrier. From 1866 to 1900, Arthur Auwers published his fundamental star catalog of 170,000 stars (Fundamental-Catalog für Zonenbeobachtungen am Südhimmel und südlicher Polar-Catalog für die Epoche 1900). See also List of astronomical observatories References External links Astrophysical Institute Potsdam – MHD Group A brief history of astronomy in Berlin and the Wilhelm-Foerster-Observatory Astrophysics Institute Potsdam Astronomical observatories in Germany Buildings and structures in Berlin