History of (BIG BOUNCE) theory
Big bounce models have a venerable history [ further explanation needed ] and were endorsed on largely aesthetic grounds [ which? ] [ when? ] by cosmologists including Willem de Sitter , Carl Friedrich von Weizsäcker , George McVittie and George Gamow (who stressed that "from the physical point of view we must forget entirely about the precollapse period"). By the early 1980s, the advancing precision and scope of observational cosmology had revealed that the large-scale structure of the universe is flat , homogenous and isotropic , a finding later accepted as the Cosmological Principle to apply at scales beyond roughly 300 million light-years . It was recognized that it was necessary to find an explanation for how distant regions of the universe could have essentially identical properties without ever having been in light-like communication. A solution was p...