US astrophysicist, responsible for the compilation of a set of photographs
now found in every astronomical library, the National Geographic Society
Palomar Observatory Sky Survey. A leading authority on novae and planetary
nebulae, he was a pioneer in the science of radioastronomy.
Minkowski was born in Strasbourg (then in Germany, now in France) and
studied at Breslau, Silesia (now Wroclaw, Poland).
He became professor of physics at Hamburg 1922, but the rise of Nazism
in Germany caused him to emigrate to the USA 1935. He worked at the
Mount Wilson and Palomar observatories in California until 1959, and
at the University of California at Berkeley 1960-65.
Minkowski divided supernovae into two principal types, and more than
doubled the number of known planetary nebulae. In collaboration with
Walter Baade, who had also been his colleague at Hamburg, Minkowski
identified a discrete radio source, Cygnus A, in 1951. This was the
first time an extragalactic radio source was optically identified.
Minkowski determined the optical red shift of the radio source 3C 295,
which was then the farthest point on the velocity-distance diagram of
cosmology, in his last observing run at the Palomar 500-cm/200-in telescope.