Shrinking Universe is apart of what

Shrinking Universe is a term used in astrophysics and cosmology to describe the concept that the entire universe is contracting or getting smaller over time. It is a hypothesis proposed as an alternative to the Big Bang theory, which suggests that the universe is continually expanding. The idea of a shrinking universe proposes that all matter and energy in the cosmos are gradually collapsing inward, leading to a decrease in the size of the universe. This concept challenges the commonly accepted notion of an expanding universe and has been explored and debated by physicists and cosmologists. However, it is important to note that the shrinking universe hypothesis has not gained widespread acceptance and remains speculative in nature.