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
A for Andromeda understanding of the creation of the elements through stellar nucleosynthesis, for developing the steady state theory of the universe and for coining the term "Big Bang" for the steady state theory's rival dynamic evolving model of the universe. Hoyle also had a taste for science fiction, having written a novel, "The Black Cloud" (1957), about a cloud of interstellar gas that threatens the Earth; this was adapted for radio and broadcast on 14 December 1957 by the BBC Home Service. The BBC were also interested in adapting "The Black Cloud" for television but Hoyle had already signed away the movie