Neutron decay plays a crucial role in explaining the expansion and compression in the universe.
Expansion occurs in deep cosmic voids as free neutrons decay into protons and electrons, leading to a significant volume increase.
Compression takes place in high-density regions, where electrons are forced into protons, reversing the decay process.
The concept of Shirley's Surface and a compactified time frame are proposed, highlighting the connection between expansion and contraction in the universe.