The Interstellar Reset: A Unified Model for the Gravitational Stabilization of Early Earth

Abstract The origin of the Earth-Moon system is currently constrained by the "Isotopic Paradox"—the geochemical identicality of the two bodies which challenges traditional Giant Impact models. This paper presents a novel Systemic Stabilization Hypothesis, proposing that a massive interstellar exoplanet (Exo) transited the inner Solar System 4.5 billion years ago (Gya). We demonstrate how this single event functions as a gravitational catalyst, using independent variables of mass and hyper-velocity to solve three disparate anomalies: the extraction of a chemically identical Moon, the stabilization of Earth’s 23.5° obliquity via a Laplace transition, and the preemptive clearing of debris reservoirs that explains the diminution of the Late Heavy Bombardment (LHB).