the universe is expanding right and the further away from us the higher the velocity. So there would have to be a distance where the galaxies in that space have an outward velocity greater than the velocity of light so that their light would never reach us ( and we could possibly be living in a singularity ). But doesn't their gravity effect us ( gravity IS conservative isn't it) This would mean that the gravitons have to travel faster than the speed of light to reach us. Could anyone please enlighten me on this issue and try not to resort to hyperspace please.