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) 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 James Burrows. It marks the first appearance of all five main characters in the series, and also guest stars Vernée Watson as Althea and Brian Patrick Wade as Kurt. Leonard Hofstadter and Sheldon Cooper are two intelligent young physicists who have a combined IQ of 360 and claim to have "beautiful minds" that understand how the universe works. However, they