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The Big Bang is a theory that the universe originated hot dense mass in a very small point that then expanded outwards, approximately 14 billion years ago. .  It is the most popular theory about the origin of the universe.  It was first proposed by [[Georges-Henri Lemaitre]].  More evidence for the Big Bang was found by [[Edwin Hubble]] and [[Bell Labs]]. Later [[George Gamow]] predicted that the Big Bang would leave an observable microwave background radiation. This radiation was subsequently discovered and found to be close to that predicted by Gamow(Gamow predicted a background radiation level equivalent to a 3 K black body object, and the observed level is that of a 2.725 K body).

The Big Bang is a theory that the universe was once in a very hot, dense state and then expanded outwards, approximately 14 billion years ago.  It is the most popular theory about the origin of the universe, widely accepted in the scientific community.  It was first proposed by [[Georges-Henri Lemaitre]].  More evidence for the Big Bang was found by [[Edwin Hubble]] and [[Bell Labs]]. Later [[George Gamow]] predicted that the Big Bang would leave an observable microwave background radiation. This radiation was subsequently discovered and found to be close to that predicted by Gamow(Gamow predicted a background radiation level equivalent to a 3 K black body object, and the observed level is that of a 2.725 K body).