The principle of Circlon Synchronicity is a theory of mass, space, time, and gravity based on the circlon shaped physical mass structures of electrons, protons and photons. Circlon synchronicity means that all electrons, protons, and photons in the Living Universe are identical and are in perfectly synchronicity with one another in time and space. All atoms have an individual momentum vector of p = mv and all photons have a momentum vector of p = mc and an angular momentum of h/2π = mλc/2π. Various theories of the photon are discussed and the reason for the constant measured speed of photons is explained.