Jerzy Pniewski (Polish: [ˈjɛʐɨ ˈpɲɛfskʲi]; June 1, 1913 – June 16, 1989) was a Polish physicist, professor at the University of Warsaw and a member of the Polish Academy of Sciences. He is best known for discovering the hypernucleus together with Marian Danysz in 1952.
