Walter Baade
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Wilhelm Heinrich Walter Baade was a German astronomer who worked in the United States from 1931 to 1959.
Baade, c. 1950
Fritz Zwicky
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Fritz Zwicky was a Swiss astronomer. He worked most of his life at the California Institute of Technology in the United States of America, where he made many important contributions in theoretical and
Walter Baade
…in 1929. He announced this finding to considerable astonishment at the 1952 meeting of the International Astronomical Union in Rome. Together with Fritz Zwicky, he identified supernovae as a new category of astronomical objects. Zwicky and he also proposed the existence of neutron stars, and suggested supernovae…
Zwicky in c. 1970
Zwicky in c. 1960
The memorial plaque on the house in Varna where Zwicky was born. His contributions to the understanding of the neutron stars and the dark matter are explicitly mentioned.
Presentation of the Presidential Medal of Freedom to Fritz Zwicky by Secretary of the Navy Dan A. Kimball and General S. Chapman US Air Force, September 1949, Azusa, California