Who was the famous astrophysicist?

Notable Astrophysicists from the Classical Period

Among the prominent figures in astrophysics, Harlow Shapley (1885-1972) was an influential American scientist. Edwin Hubble (1889-1953), another esteemed American, made significant contributions to the field. Also noteworthy is Walter Baade (1893-1960), who was born in Germany but later became an American citizen. Lastly, Georges-Henri Lemaître (1894-1966) was a distinguished Belgian astrophysicist.