Walter Baade | Vibepedia

Walter Baade was a renowned German astronomer who made groundbreaking contributions to our understanding of the universe, working in the United States from 1931 to 1959. His work at the Mount Wilson Observatory, alongside fellow astronomers like Edwin Hubble and Milton Humason, revolutionized the field of astronomy. Baade's discoveries, including the distinction between Cepheid variables and the calculation of the universe's expansion rate, have had a lasting impact on the work of modern astronomers like Neil deGrasse Tyson and Brian Greene.