Carl
Charlier

University of Lund


Elis
Strömgren

University of Copenhagen (Physics Tree)


Carl Ernst Heinrich
Schmidt

Kaiserliche Universität Dorpat (Chemistry Tree)


Arthur Joachim
von Oettingen

Kaiserliche Universität Dorpat (Meteorology Tree)


Wilhelm Friedrich
Ostwald

University of Leipzig (Chemistry Tree)


Thorvald
Thiele

University of Copenhagen (Physics Tree)


Hans Emil
Lau

Urania observatory, Copenhagen (Physics Tree)


Hugo
von Seeliger

Universität München


Karl
Schwarzschild

Astrophysical Observatory Potsdam (Physics Tree)




Gerard P.
Kuiper

University of Arizona

Tom
Gehrels

University of Arizona
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Tom GehrelsX