Dynamic Coupling of Lunar Capture and Martian Migration: Evidence of a Planet 9 Flyby in the Inner Solar System

The current orbital architecture of the inner Solar System presents dynamic and angular momentum anomaliesthat challenge classical models of slow accretion and isolated evolution. This paper proposes a unified, purelymechanical N-body dynamical model that couples threefundamental geophysical and orbital events: Earth’s axial tilt (23.5◦), the insertion of the Moon into its current orbit, and the abrupt migration of Mars to 1.52 AU.Using high-precision numerical integrations (REBOUNDIAS15 / RK4) under a strict methodological constraint of"Zero Modulation" (utilizing only proven original massesand mean motion physics), we demonstrate that theEarth-Mars system previously existed in a low-entropystate (3:2 resonance, zero terrestrial obliquity). The geometric rupture of this system is explained by the transient intrusion of a massive trans-Neptunian body (∼44Earth Masses), whose orbital characteristics—blindly demanded by our genetic algorithms—mathematically coincide with the theoretical constraints of the hypotheticalPlanet 9