Chaos theory is a branch of mathematics and physics that studies complex systems that are highly sensitive to initial conditions. Chaos theory explores how deterministic systems, when subjected to small changes in initial conditions, can exhibit seemingly random and unpredictable behavior. Chaos can be found in various natural phenomena, from the weather to the motion of celestial bodies. In the context of the universe, chaos theory plays a role in understanding the behavior of celestial objects, the dynamics of galaxies, and the evolution of cosmic structures. Chaos can also have significant implications for our understanding of long-term predictability in complex systems and the boundaries of determinism and randomness in the universe.