Perhaps the 'big bang' was just a local incident. Could matter exist as matter under the preasure and temperature, not to mention accelerations of a humungous bang powerful enough to propel shrapnel zillions of parsecs in all directions?
The local, and for convenience sake, most recent 'big bang' might just have been energetic enough to reverse the drift of other more remote and senior 'big bang' products that would otherwise have been more or less converging on us.
It could be sort of like watching a pond of water during a light 'April shower'; as the shock wave from one drop meets the wave from an earlier drop, the trend is to overwhelm the lesser wave. But some does get through the newer wave front you say? Yes true, and just how is it that we see galaxies colliding now and then? Could it not be that the odd galaxy gets through the shock wave as it were, and keeps on with its original trajectory, ultimately colliding with what ever gets it the way?
Can there be an outside of an infinite thing? Seems not in a 3 dimentional mind set, but if there were other dimensions not bound to the 3 dimensions it could be feasable. Consider the 'Mobius Ring'; (below picture 'lifted' from
http://www.ka-gold-jewelry.com/p-pro...ing-silver.php)
it has diameter, width, thickness, but in a sense, unmeasurable circumference. What volume of space does it enclose, or how much gas/fluid can be contained within it? What really are its boundaries?
Yet it does have an outside, a region beyond itself........or does it?