EXPERIMENTAL ADDENDUM Atomic clocks, photometric gradient, and Mercury's orbit: direct probes of the Plenum's pressure

Title: Experimental Addendum – Atomic clocks, photometric gradient, and Mercury's orbit Abstract: This document serves as an experimental addendum to the Kenophobic Model, proposing a falsifiable testing protocol at the scale of the Solar System. Departing from the geometric ontology of General Relativity, this theoretical framework models the vacuum as a continuous material fluid under extreme pressure (the Plenum). The present text details how this hydrodynamic approach allows for the mechanical reinterpretation of several astrophysical phenomena. First, gravitational time dilation is described as a variation in the frequency of atomic clocks induced by changes in the local stiffness of the medium (Δ P). Second, the document proposes using the solar photometric flux as an indirect tracer to map this vacuum pressure. Finally, it lays the conceptual groundwork for testing the residual perihelion advance of Mercury, evaluating whether the solar depletion gradient generates an effective force capable of providing a measurable mechanical contribution to this orbital anomaly. The approach is strictly quantitative and relies on cross-calibrations accessible through current and future space missions.