Someone started a recent thread with a statement that included "light exists outside of time". That excerpt was flatly rejected, and the post generated such a lively response that it was closed, having "wandered off into philosophy". It made me wonder if "light exists outside of time" describes the thought I've had for some time. Suppose, on a planet around a star a billion light years away, some event in an atom results in a photon traveling toward Earth. Much later, the photon strikes an atom on earth causing an event witch absorbs the photon's energy. Now both Earth and the remote planet have experienced about a billion years as the photon made its way from one to the other. But the photon itself did not experience any time at all (right?). So can we say that from the photon's point of view, the events on both planets happened together and are connected, as if there was really only one event?