While it is true that every point in the Universe is the center of its own, unique observable universe, it isn't the case that we can see the effects of things outside our own observable universe on objects that we can see.wonderboy wrote:From what I understand, if you sit right at the edge of the observable Universe, you can see 13.4 Billion Light Years in any given direction. So if you are on the edge of the observable universe does this mean that you can see things which we will never see. If this is the case, then it is perfectly concievable that there is something on the outside of "OUR" observable universe which we cannot see that is pulling space objects towards it.
There is no need for dark flow (if it exists... there remains a good deal of uncertainty about that) to be caused by anything pulling on it. All we seem to be observing is motion, and that requires no forces. The motion could be residual, from long ago. For instance, an area of high mass could have attracted the material early in the Universe- material that is now outside the observable Universe but was not then.