Bhuvaneswari Vortex Gravity (BVG) proposes that gravity does not come from spacetime curvature but from gradients in a universal light‑field medium whose density is called rho_L. The fundamental BVG law states that gravitational acceleration is proportional to the negative gradient of the light‑field density: g = -58.6 * gradient(rho_L). This replaces Newton’s constant with a measurable physical quantity. BVG introduces a new physical unit called LW (Light‑Weight), which represents the gravitational density of the light‑field medium. The gradient of LW produces gravity, the distribution of LW mimics mass in galaxies and lensing, and the potential of LW drives cosmic acceleration. This allows BVG to reproduce all weak‑field predictions of General Relativity, including Mercury’s perihelion and light bending, while naturally explaining galaxy rotation curves without Dark Matter and cosmic acceleration without Dark Energy. The theory provides a physical definition of the photon as a self‑propagating density pulse of the light‑field medium, giving a unified mechanism for gravity, lensing, wave propagation, and quantum jitter. BVG also predicts strong‑field amplification near compact objects through vortex compression, matching S2‑star perihelion data and offering testable deviations from GR. BVG is empirical, reproducible, predictive, and falsifiable. It presents a complete physical ontology in which all gravitational phenomena arise from the density, gradients, vortices, and fluctuations of a universal light‑field medium.