Elis
Strömgren

Copenhagen University


Niels
Bohr

Copenhagen University


Hans Marius
Hansen

Copenhagen University


Otto
Struve

UC Berkeley




Max
Born

Edinburgh


Niels
Bohr

Copenhagen University


Ralph H.
Fowler

Cambridge


Edward Arthur
Milne

Oxford (MathTree)






Adil
Hassam

University of Maryland

Sheung-Wah
Ng

University of Maryland
(Options)

Sheung-Wah NgX