György Paál (Budapest, 1934 – Budapest, 1992) was a Hungarian astronomer and cosmologist. Work In the late 1950s Paál studied the quasar and galaxy cluster distributions. In 1970 from redshift quantization he came up with the idea that the Universe might have nontrivial topological structure. These are the oldest papers that associate real observations with the possibility that our universe could have nontrivial topology. Membership Cosmological Committee of IAU Awards László Detre award. See also Accelerating universe Cosmological constant Dark energy Redshift quantization Universe Shape of the universe References 20th-century Hungarian astronomers Cosmologists 1934 births 1992 deaths