The Galactic Gateway Hypothesis: Supermassive Black Holes as Chronon Valves to Parallel Manifolds Authors: Ali Alhawarat Affiliation: Independent Researcher, Chicago, United States ORCID: 0009-0003-3973-6031 Description: We extend the Chronon Annihilation Theorem to propose that supermassive black holes act as chronon valves, transferring annihilated local time into parallel spacetime manifolds. Three falsifiable predictions for LISA, EHT, and JWST are provided. Keywords: Black Holes, Parallel Universes, General Relativity, Chronon, Time Inversion, Cosmology, LISA, EHT License: Creative Commons Attribution 4.0 International