The History of BIG BANG Theory
Etymology English astronomer Fred Hoyle is credited with coining the term "Big Bang" during a 1949 BBC radio broadcast, saying: "These theories were based on the hypothesis that all the matter in the universe was created in one big bang at a particular time in the remote past." It is popularly reported that Hoyle, who favored an alternative " steady state " cosmological model, intended this to be pejorative,but Hoyle explicitly denied this and said it was just a striking image meant to highlight the difference between the two models. : Development Hubble eXtreme Deep Field ( XDF ) XDF size compared to the size of the Moon – several thousand galaxies , each consisting of billions of stars , are in this small view. XDF (2012) view – each light speck is a galaxy – some of these are as old as 13.2 billion years– the universe is estimated to contain 200 billion galaxies. XDF image shows fully mature gala...