Hi Billy T. I enjoyed your book and continue to be impressed by your thinking. I think we have finally agreed that photon's gravitate. Maybe gravity is a property of photons and propagates away from them in all directions at light speed as they move through space. Lets call this property, gravitons. Then the photons on the way to your eyes must swim through all the gravitons of all other photons in space. I can't get my mind around how this would pull the moving photons into single lines.