Subtle Particles and the Repulsive Gravity Model ("RGM")

This paper proposes a structural review of gravitational dynamics and fundamental interactions through the formulation of the Repulsive Gravity Model (RGM). Although the hypothesis of a universal continuous medium (ether) has historically been set aside in favour of Einsteinian relativity, it is explained how the extension of Lorentz transformations and the application of Franco Selleri’s inertial transformations allow for the reintegration of this physical substrate. On this basis, the article sets out the quantitative principles of a theory of local hydrodynamic gravitation, analytically calculating certain fundamental micro-physical parameters for a selection of elements from the periodic table: the atomic interaction diameter ( ), the ratio between and the diameter of the nucleus, and the ratio between the interacting ether and the ether present in baryonic matter. The calculations reveal extremely high latent energy densities in the medium, several orders of magnitude greater than those of nuclear origin and theoretically amenable to engineering extraction. The hydrodynamic model offers a unified resolution to multiple cosmological and quantum anomalies, eliminating the theoretical need to postulate the existence of dark matter, dark energy and the initial singularity (Big Bang). Complex phenomena such as the sponge-like structure of the visible Universe, the anisotropy and stationarity of the Cosmic Microwave Background Radiation ( ), the kinetic impossibility stated by the Third Law of Thermodynamics, and the experimental failure to detect the graviton find a causal and coherent explanation within the physics of subtle particles (Subtle Particles Model, SPM). Finally, a new mathematical formulation of the law of gravitation is derived, the framework of which redefines the physical meaning of the variables involved: mass ceases to be an intrinsic property of matter, being redefined as a measure of the body’s degree of impermeability to the hyperluminal flow of free etherons. The equivalence between inertial mass and gravitational mass is thus traced back to the same fluid-dynamic resistance, establishing the technical possibility of total shielding aimed at the simultaneous cancellation of weight, inertia, and the c-limit for vehicles. The universal gravitational constant is replaced by the ether pressure coefficient , a quantity that varies as a function of the density and velocity of the subtle particles in the specific region of the cosmos under consideration.