The mathematics passes me by, so please be patient. I have an idea that may have been posited before, but I've not seen it. Could it be that the expansion of the universe as we see it is only a relatively minescule fraction of the whole expansion? I have a mental image of the gaseous expansion of an explosion, which viewed from the outside would appear to be an expanding ball of gases. However, if viewed from within one of the expanding edges from a minute or atomic perspective, one might draw the conclusion that the area around oneself was expanding in ALL directions. The truth would be that this was only the case in that particular region of the expanding gases, but that there was actually a point at which the expansion began; another geographic location. From one's atomic viewpoint, one could not see the start point for the expansion, much beyond the immediate vicinity and certainly not the expansion going on on the other side of the originating point. The expansion might still be accelerating, just as during the acceleration phase of an explosion, even though from the leading edge, the force for expansion might not be visible. The question I'm asking is whether an expanding 'ball' theory has been proven not to be the case. Can anyone help?