Karl Paley Cohen workd within a group that included an American physicist who won the Nobel Price in Physics for his discovery of what?
Karl P. Cohen Karl Paley Cohen (February 5, 1913 – April 6, 2012) was a physical chemist who became a mathematical physicist and helped usher in the age of nuclear energy and reactor development. He began his career in 1937 making scientific advances in uranium enrichment (isotope separation) as research assistant to Harold Urey, whose discovery of deuterium–the heavy isotope of hydrogen– earned him the 1934 Nobel Prize. Cohen worked within the Columbia group of physicists that included Harold Urey, Enrico Fermi, Leo Szilard, Isidor Isaac Rabi, John R. Dunning, Eugene T. Booth, A. Von Gross and others)–all pioneers of nuclear energy.
Donald Howard Menzel Donald Howard Menzel (April 11, 1901 – December 14, 1976) was one of the first theoretical astronomers and astrophysicists in the US. He discovered the physical properties of the solar chromosphere, the chemistry of stars, the atmosphere of Mars, and the nature of gaseous nebulae. The minor planet 1967 Menzel was named in his honor.