Wellwisher, good try! But, I believe that the, "Prince Of The Power Of The Air" will not let you win; with moving back towards physics; which is what I would prefer! I am with you Wellwisher, let's do Physics. I am not sure what you mean by ""vector addition" will slow the speed at which they appear to approach" I am sure that you mean galaxies. But why you would use the term "Vector Addition"?