Big Bang is a past horizon, though in practice our view is also limited by the opacity of the universe at early times. So our view cannot extend further backward in time, though the horizon recedes in space. If the expansion of the universe continues to accelerate, there is a future horizon as well. 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
Pilot (The Big Bang Theory) calling it "a great start for the series", and stating that the writing was "some of the best we've seen in a standard sitcom in some time". Matthew Gilbert of "The Boston Globe", however, gave a negative review, saying that the show is "one of those laugh-track sitcoms that has exactly one comedy routine and just keeps hammering it home". Pilot (The Big Bang Theory) The pilot episode and series premiere of "The Big Bang Theory" originally aired on CBS in the United States on September 24, 2007. It was written by Chuck Lorre and Bill Prady, and directed by