The moment of creation for the universe. Eric Weisstein's World of Astronomy The study of the Big Bang and the subsequent evolution of the universe Eric Weisstein's World of Astronomy is a known as cosmology. The best method for determining the age of the universe Eric Weisstein's World of Astronomy is by using the Hubble law. Current estimates give 12-20 billion years. The phrase "Big Bang" was coined by Fred Hoyle Eric Weisstein's World of Biography in an interview on BBC radio. He used the term in a derogatory sense (since the steady-stead model, of which he was a proponent, was the accepted one at the time), but it stuck at has entered the standard vernacular.
References
Allday, J. Quarks, Leptons, and the Big Bang. IOP Press, 1998.
Overbye, D. Lonely Hearts of the Cosmos: The Scientific Quest for the Secret of the Universe. New York: HarperCollins, 1991.
Wald, R. M. Space, Time, and Gravity: The Theory of the Big Bang and Black Holes, 2nd ed. Chicago, IL: University of Chicago Press, 1992.
Weinberg, S. The First Three Minutes: A Modern View of the Origin of the Universe, upd. ed. New York: Basic Books, 1988.