Otto Stern (German pronunciation: [ˈɔto ˈʃtɛʁn] ⓘ; 17 February 1888 – 17 August 1969) was a German-American physicist and Nobel laureate in Physics.

[2] Stern completed his studies at the University of Breslau in 1912 with a doctoral dissertation in physical chemistry[2] under supervision of Otto Sackur on the kinetic theory of osmotic pressure in concentrated solutions.

Stern served in World War I doing meteorological work on the Russian front while still continuing his studies and in 1915 received his Habilitation at the University of Frankfurt.

[1][3] After resigning from his post at the University of Hamburg in 1933 because of the Nazis' Machtergreifung (seizure of power), he found refuge in the city of Pittsburgh becoming a professor of physics at the Carnegie Institute of Technology.

[5] As an experimental physicist Stern contributed to the discovery of spin quantization in the Stern–Gerlach experiment with Walther Gerlach in February 1922 at the Physikalischer Verein in Frankfurt am Main.