Big+Bang+JACOB

The Universe has expanded from a primordial hot and dense initial condition at some time in the past. The Big Bang theory developed from observations of the structure of the Universe and from theoretical considerations. You can see that the Universe is expanding my observing the redshift. Fred Hoyle is credited with coining the term //Big Bang// during a 1949 radio broadcast, he believed in a steady state universe, and the term was supposed to be derogatory.