How big is the center of gravity? Is it one single point at a Planck length or an accumulation of points in a general area? The amount of energy in to one point Push out of particles(solar wind)

I was watching a plane fly over head once at night and the blinking of the light made me to start thinking of when that light is on and when the light is off. If you could travel at c the light would either be on or off dependent upon when the acceleration occurred. The changes would come from a slower velocity. Would have to be in the range of when the light was on or off Photons traveling through space, the field lines ahead of the photon influencing the fields ahead of it around it. Comparisons from an absolute collision to absolute no collision. Energy against energy What is the area of the effected area The area of the absolute opposite, How far out does the area of the opposite go What happens at the center of any mass? How is the size of the area effected? What happens when a force from a spherical compression is compressed to the center? What can go straight through and what is reflected or refracted back to which angle? What happens when c stops?