Astronomers have made their own confirmations of the Big Bang theory.The Big Bang theory hypothesizes that there were time-based stages in the origins of the universe.The Big Bang theory concerns not just the origins of the universe but its ultimate fate.The critical confirmation of the Big Bang theory came in 1964.Confirmation of the Big Bang Theory.Fox, Karen C. The Big Bank Theory: What It Is, Where It Came from, and Why It Works.A Brief History of Time: From the Big Bang to Black Holes.Calibrating the Cosmos: How Cosmology Explains Our Big Bang Universe.Big Bang: The Origin of the Universe.Timeline of the Big Bang.