The Boundary Structure of the Moon and Its Role as a Hydraulic Interface in Regulating the Dynamics of the Earth System

This paper presents a rigorous mechanical framework based on fluid dynamics and incompressible media to redefine the Moon not as a celestial body suspended in an absolute vacuum, but as a dynamic Hydraulic Interface regulating the outer boundaries of the Earth's vortex. By bypassing traditional gravitational and vacuum models, the study demonstrates how the complete absence of a lunar atmosphere enables direct contact with external pressure gradients and ensures orbital stability through mechanical harmonization. Furthermore, the model explains the Moon's locked axial rotation, surface luminescence, optical phases, solar and lunar eclipses, and tidal dynamics purely as manifestations of pressure gradient distributions, fluid interactions, and geometric boundary displacements within an interconnected cosmic fluid manifold.