The Great Cosmic Cycle Theory

This paper proposes a complete theoretical system of the Great Cosmic Cycle. The universe is infinite, boundless, and eternal, rejecting the singularity Big Bang model. The fundamental law of the universe is the eternal interconversion between energy state and matter state. The strong force and electromagnetic force construct matter, while universal gravitation decomposes matter and returns it to energy. Stars evolve into white dwarfs, neutron stars, and finally black holes. Black holes are the core nodes of the cosmic cycle, which can completely restore matter to pure energy. Ordinary black holes are evolved from neutron stars; supermassive black holes are high-energy photon soup at the core of galactic vortices. Black holes appear dark because they emit no visible light or convert visible light into high-energy invisible light, not because gravity traps light. Gravity only binds matter with rest mass, not photons and energy. Black holes release energy through polar jets, which cool and condense into nebulae, stars, and planets, forming an endless closed-loop of mass-energy cycle. This theory is self-consistent, logically complete, and consistent with basic physics and astronomical observations, without unproven assumptions such as singularities, dark matter, or spacetime curvature.