posted on Aug, 22 2010 @ 02:05 PM
Originally posted by zatara
Do you guys have an idea why the universe is this ridiculous vast?
We don't even know how big it is.
The comoving distance from Earth to the edge of the observable universe is about ...46.5 billion light-years in any direction.
78 billion light-years. This is a lower bound for the diameter of the whole Universe (not just the observable part)
So 78 billion light years is
just the minimum size, we don't know how much bigger it is.
But I agree with the other posters who say these numbers are beyond our comprehension anyway.
Not that long ago, the Milky Way was the known universe. And of course, people asked "what's outside of that?" Now we know, but we can still ask
"what's outside the known universe?" That question will be harder to answer than the question about what was outside the Milky Way.
So the reason it's vast is, if we come up with any size smaller than vast, the very next question is, "what's outside of that"? Not only do we
have a hard time imagining infinite size, but we have a hard time imagining the opposite too. If there IS an end to the universe, what's it like? If
we keep traveling in one direction and can't go any further, why not? What stops us?
So our brains are pretty limited when it comes to dealing with things as big as the universe.
One answer to your question could be: "to boggle our minds"!