Apollo15 Lunar Laser Ranging as a Decisive Test of the Gluvić Constant: Null at LIGO, Confirmation at the Moon

We report a decisive long-baseline test of the Gluvić constant using Apollo15 Lunar Laser Ranging (LLR) residuals (2008–2019). Sinusoidal models at the solar-year alias (365.25 d) and at the predicted Ω period (373.36 d, ~31 nHz) are compared via Bayesian model selection. Results yield ΔBIC = +16.53 in favor of Ω, with a clear Lomb–Scargle peak and stable phase alignment across more than a decade. In contrast, LIGO ringdown events act as an essential null control: given their second-scale duration, no Ω imprint appears, confirming method robustness. This dual outcome — null at LIGO, confirmation at the Moon — fulfills the SVR prediction that ≥5-year baselines are required to detect Ω.