Joseph L.
Pawsey

Commonwealth Scientific and Industrial Research Organisation


Ruby Violet
Payne-Scott

Commonwealth Scientific and Industrial Research Organisation


John Gatenby
Bolton

Australian National Radio Astronomy Observatory


David
Gill

Royal Observatory at Cape of Good Hope (Astronomy Tree)






Wilhelm Friedrich
Ostwald

Leipzig University (Chemistry Tree)


Hans Emil
Lau

Urania observatory, Copenhagen


Elis
Strömgren

Copenhagen University


Karl
Schwarzschild

Astrophysical Observatory Potsdam












George E.
Hale

Yerkes Observatory (Astronomy Tree)






George A.
Van Biesbroeck

Yerkes Observatory (Astronomy Tree)




Otto
Struve

UC Berkeley




Julius
Mac Leod

Ghent University (Chemistry Tree)








Anton
Pannekoek

Amsterdam


Jan
Woltjer

Leiden (Astronomy Tree)








Robert Grant
Aitken

Lick Observatory (Astronomy Tree)


Gerard P.
Kuiper

University of Arizona




John Krom
Rees

Columbia


Harold
Jacoby

Columbia






George E.
Hale

Yerkes Observatory (Astronomy Tree)






Rudolf
Lipschitz

Universität Bonn


Julius
Plücker

Universität Bonn


Rudolf Friedrich Alfred
Clebsch

Universität Göttingen


Felix Christian
Klein

Universität Göttingen


Friedrich Karl
Hayn

University of Königsberg


Heinrich
Bruns

Universität Leipzig


Johannes Franz
Hartmann

Kuffner-Sternwarte


Hugo
von Seeliger

Universität München




Richard
Schorr

University of Hamburg (Astronomy Tree)


Walter
Baade

Mount Wilson Observatory



Robert Woodrow
Wilson

Bell Labs
(Options)

Robert WilsonX