Okay. But you mentioned how much there is out there that we can (or someday could) see. The unobservable universe (and I'm talking about what is beyond our sphere of visibility, not dark matter) is theoretically much, much, MUCH larger.
It isn't scientifically proper to talk about the unobservable universe in this sense because relativistically speaking that universe does not exist to us. Strictly speaking all we can legitimately discuss is that which lay in our light cone:
One thing that throws a monkey wrench in this is the fact that the universe is expanding faster than our light cone. This means stuff at the edges of the observable universe is passing out of existence for us constantly. The observable universe will appear to shrink with the passage of enough time as distant galaxies fall out of our cosmic horizon. After that, local galaxies will disappear, and even our own galaxy will vanish from our existence (by our existence I mean the perspective of Earth). No one is likely to be around at that point, but if there is, it would be curious for them to look back on records that documents a much larger universe than they can actually see. This is all assuming the current rate of expansion holds steady.
