Following his Ph.D. he spent five years teaching and researching with the renown Professor Otto Struve.
Together with Otto Struve, he studied the rapid rotation of stars of young spectral types and measured the radial velocities of stars.
At the time, the university had no faculty of astronomy, so in 1932 it formed a collaboration with Otto Struve at the University of Chicago, who supplied astronomers.
Otto von Bismarck | Otto | Otto III | Otto Piene | Otto I, Holy Roman Emperor | Otto I | Otto Preminger | Otto II | Otto Dix | Otto Natzler | Otto II, Holy Roman Emperor | Otto Binder | Otto Skorzeny | Otto Schenk | Otto of Brunswick | Otto Kerner, Jr. | Otto Steinbrinck | Otto Kerner | Otto IV, Holy Roman Emperor | Otto IV | Otto III, Holy Roman Emperor | Otto Braun | Miranda Otto | Frei Otto | Otto-Werner Mueller | Otto Schmidt | Otto Muehl | Otto Lilienthal | Otto Klemperer | Otto Hermann Kahn |