Brian Cox - What Is The Big Bounce Theory
The big bounce theory?
The Big Bounce theory is a speculative cosmological model that suggests the universe goes through cycles of expansion and contraction, with each cycle called a "bounce." Unlike the widely accepted Big Bang theory, which posits a singular event marking the beginning of our universe, the Big Bounce theory proposes that the universe is eternal and has no true beginning or end.
The Bounce: The key feature of the cyclic universe model is the idea that the contraction phase does not result in a singularity, as in the Big Bang theory. Instead, the universe experiences a "bounce" or a transition to a new expansion phase without reaching infinite density. This bounce is hypothesized to occur due to physical processes that are not yet fully understood but are meant to prevent the universe from collapsing into a singularity.
Role of Dark Energy: Dark energy, a mysterious form of energy thought to be responsible for the current accelerated expansion of the universe, often plays a significant role in the cyclic universe model. It may be responsible for driving the expansion during each cycle.
Singular Origin.
The idea of "no singular origin" refers to certain cosmological models and hypotheses that propose the universe did not have a single, definitive starting point or a moment of creation like the Big Bang theory suggests. Instead, these models propose scenarios where the universe has no true beginning or end, or where it cycles through phases of expansion and contraction without ever reaching a singularity.