Evidence for Cosmic Harmonic Periodicity in Galaxy.

We present decisive Bayesian evidence for the existence of harmonic periodicities in the cosmic evolution of galaxies. By analyzing 59,569 galaxies from 7 independent JWST elds and 1,734 galaxies from SDSS/eROSITA, we detect a fundamental frequency ω0 = 0.191 ± 0.012 in SDSS (log BF = 107.1). In JWST data, we identify multiple harmonics following ωn = n × 0.191 for n = 2, 3, 4, 6, with the harmonic ω = 0.764 being consistent across all elds (log BF > 800). The total Bayesian evidence (log BFtotal > 2500) strongly supports the existence of these cosmic periodicities, which also evolve signicantly with redshift (σω = 0.1463), suggesting physics beyond the standard ΛCDM model evolution.