Rubin Spiral-Field A Geometric Alternative to Dark Matter and Dark Energy

R-SF (Rubin Spiral Field) is a relativistic geometric field framework offering an alternative explanation to phenomena commonly attributed to Dark Matter and Dark Energy. The model assumes that the physical vacuum is not empty, but constitutes a continuous field-like medium with an underlying geometric structure, coupled to spacetime and influencing gravitational dynamics on galactic and cosmological scales. Within R-SF, non-Newtonian gravitational effects do not arise from hidden particles or exotic energy components, but from emergent dynamics resulting from field–matter coupling within an anisotropic vacuum background. The framework is fully specified, theoretically derived, and does not rely on empirical tuning or post-hoc fitting.