ألكسندر كيرينسكي
Pavel Karlovich Shternberg (; April 2, 1865 – February 1, 1920, both dates New Style) was a Russian professor, academic, astronomer, Bolshevik and revolutionary of German decent. Shternberg contributed to the abolition of the Tsarist government by Alexander Kerensky during the February Revolution of 1917. He was friends with two notable revolutionaries, Vladimir Lenin and Leon Trotsky.