Four fundamental constants — the cosmological constant, Newton's gravitational constant, the de Sitter horizon temperature, and a vacuum scale — align on a single line with slope 137.036. The framework resolves the cosmological constant problem and explains the Hubble tension through thermodynamic expansion.
Four fundamental physics constants — the cosmological constant, Newton's gravitational constant, the de Sitter horizon temperature, and a vacuum scale — align on a single line with slope 137.036 (the inverse fine structure constant). This value is derived from geometric principles and demonstrated to agree with measured values across multiple independent measurement programmes. The work resolves the cosmological constant problem, explains the Hubble tension through thermodynamic rather than kinematic expansion, and predicts the universe will reach de Sitter equilibrium in approximately 36 billion years total. The framework contains zero free parameters and proposes testable predictions for DESI, Euclid, Planck, and CMB-S4.