Felix Christian
Klein

Universität Göttingen


Johannes Franz
Hartmann

Kuffner-Sternwarte


Richard
Schorr

University of Hamburg (Astronomy Tree)


Walter
Baade

Mount Wilson Observatory




Bart J.
Bok

University of Arizona




George
Wallerstein

University of Washington


Max
Born

Edinburgh


Niels
Bohr

Copenhagen University


Ralph H.
Fowler

Cambridge


Edward Arthur
Milne

Oxford (MathTree)






Peter S.
Conti

CU Boulder

Kelsey E.
Johnson

UVA
(Options)

Kelsey JohnsonX