Null Motion Cosmology: A Vacuum-Based Framework Unifying Relativity, Quantum Vacuum and Cosmic Expansion

Inspired by the ancient Chinese Taoist thought of "Being born from Nothing", this paper abandons the conventional cosmological framework involving dark energy and the cosmological constant Λ. On this basis, a novel cosmological framework named Null Motion Cosmology is constructed, which takes the intrinsic null dynamics of the vacuum and the equivalence of existence and light-speed motion as its two core axioms. This paper gives a rigorous mathematical definition of null motion, and proves that the universe is supported by an infinite energy base, with the total energy in proportional to the spatial structure and mass. The framework unifies general relativity, quantum vacuum and cosmic expansion, and is compatible with Einstein field equations 4 and Friedmann equations 5. It also solves long-standing unsolved cosmological problems, such as the infinite vacuum energy dilemma, the nature of dark energy, the cosmic heat death puzzle, and the physical meaning of black hole singularities 6. In addition, this theory is in line with major cosmic observational results, including Type Ia supernovae 12, cosmic microwave background radiation, and baryon acoustic oscillations 3. Only one free parameter k is introduced in this theory, which is directly measurable and quantifiable, providing a new and self-consistent approach to exploring the fundamental logic of cosmology.