The Oscillatory Universe is a theory that states that the universe will expand to a certain point, then retract to the point of the big bang. It would then repeat the process throughout eternity.

The theory begins with the Big Bang theory, which states that all matter was compressed and a force caused it to expand outward. The theory would then take the course of the Big Crunch theory, stating that when enough gravitational force within the universe exists, the univese will retract in upon itself to the point of the big bang, and the process will repeat.

See also

Big bounce