Parents

Sign in to add mentor
Elis Strömgren grad student 1908-1909 Copenhagen University (Physics Tree)
Wilhelm Friedrich Ostwald post-doc 1901-1902 Universität Leipzig (Chemistry Tree)
Hans Emil Lau research scientist 1907-1909 Urania observatory, Copenhagen (Physics Tree)
Karl Schwarzschild research scientist 1909-1919 Astrophysical Observatory Potsdam (Physics Tree)

Children

Sign in to add trainee
Willem Jacob Luyten grad student 1921 Leiden
Gerard P. Kuiper grad student 1933 Leiden
Pieter Theodorus Oosterhoff grad student 1933 Leiden
Kaj Aage Strand grad student 1938 Københavns Universitet
Adriaan J Wesselink grad student 1938 Leiden
Lukas Plaut grad student 1939 Leiden