Gold Medal24 March 1893
Birth of Wilhelm Heinrich Walter Baade
World History Database · Biography facts · Archive · Germany · Baade · Wilhelm Heinrich Walter Baade
Historical person
Wilhelm Heinrich Walter Baade Biography
Historical biography and chronological timeline for Wilhelm Heinrich Walter Baade, based on 7 World History Database records associated with Germany.
7 records1893–19604 events0 places
Chronological biography
1893
1931
Death of Wilhelm Heinrich Walter Baade1931
Emigrates to the USA in 1931
1940
Discovery of Cepheid Stars1940
Walter Baade recognizes that Cepheids consist of at least two separate populations (classical Cepheids & Type II Cepheids). Classical Cepheids are younger and more massive population I stars, whereas Type II Cepheids are older fainter population. Resolves stars in the centre of the Andromeda galaxy for the first time, which led him to define distinct "populations" for stars (Population I and Population II)
1952
Discovery of Cepheid Stars1952
Recalculates the size of the known universe, doubling the previous calculation made by Hubble in 1929, announces this finding to considerable astonishment at the 1952 meeting of the International Astronomical Union in Rome
1954
Gold Medal1954
Winner of the Gold Medal of the Royal Astronomical Society
1956
Hubbles Law1956
It was not until 1956 that Walter Baade corrected the distance scale based on Cepheid variable stars, and ushered in the first accurate measures of the expansion rate
1960
Death of Wilhelm Heinrich Walter Baade25 June 1960
Death of Wilhelm Heinrich Walter Baade
Record provenance
This biography is assembled from World History Database records filtered by country and personal-name fields. Exact duplicate display records are removed. The database is an index rather than a complete narrative biography; formal research should verify entries against relevant primary or specialist sources.