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


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)




John M.
Schaeberle

Lick Observatory


William Wallace
Campbell

Lick Observatory (Physics Tree)


William Wallace
Campbell

Lick Observatory (Physics Tree)


Robert Grant
Aitken

Lick Observatory


Robert Williams
Wood

Johns Hopkins (Physics Tree)


William Wallace
Campbell

Lick Observatory (Physics Tree)


Joseph Haines
Moore

UC Berkeley


Leopold Friedrich Anton
Ambronn

Universität Göttingen










Kaj Aage
Strand

U.S. Naval Observatory




Otto
Struve

UC Berkeley (Physics Tree)




William Pendry
Bidelman

University of Michigan


James Craig
Watson

University of Michigan


John M.
Schaeberle

Lick Observatory


William Wallace
Campbell

Lick Observatory (Physics Tree)


Henry A.
Rowland

Johns Hopkins (Physics Tree)


Heinrich
Rubens

Universität Berlin (Physics Tree)


Robert Williams
Wood

Johns Hopkins (Physics Tree)


John M.
Schaeberle

Lick Observatory


William Wallace
Campbell

Lick Observatory (Physics Tree)


Joseph Haines
Moore

UC Berkeley


Charles Donald
Shane

Lick Observatory

Charles Bruce
Stephenson

Case Western
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Charles StephensonX