The universe being what it is, It blows my mind knowing that those stars we see, or the pictures we get from our various telescopes shows us things from millions of years past as the light from those stars can take that long just to get to us. Astronomy is the only way to a true time machine. And don't get me started on the big bang. My puny brain has trouble comprehending all of "everything" as a small dot exploding out to make the universe as it is now...still exploding apart. They even say that it is slowing down, and might someday come back together, and this big bang might not have been the only one. It might have been going on for countless times before. To think of that small dot, and having to look at it as that being the universe. That dot didn't explode into space that was already there...space itself stretched with it. So then you have to ask yourself, what was beyond the space? In all normal scientific terms...nothing was. I can't comprehend nothing. See how I babble when I get going on this?