BetterMost Community Blogs > The Twist Family Bible Study
Cowboy Cosmology
injest:
I think you think more about stuff than me....and it is interesting to read what you DO think.
It hurts my head to think too much about the 'universe' and what might be outside it. Cause how could something be outside the universe if the universe is everything?
injest:
hmmmmm!
http://news.bbc.co.uk/2/hi/science/nature/7543776.stm
why dont' I ever discover something?
Wayne:
Well, our universe is limited by what can be seen by telescopes. And what can be seen by a scope is limited by the speed of light.
The current understanding is the Big Bang happened 13.7 billion years ago, and I've read that galaxies have been identified that are 12 to 13 billion light-years away. That means the light we are seeing left those galaxies 12 to 13 billion years ago, so we are seeing them as they were in the first billion years or so after the BB.
Beyond that, there is a sphere of haze. There were no galaxies yet to send out any light. Presumably that haze prevents us from seeing any farther. So our universe more or less coincides with "everything produced by our Big Bang."
One could imagine though, that a clear enough spot could exist in the sphere of haze that you could see through it, and beyond to the product of another Big Bang. Probably just a dot, but a whole nother universe, as it existed many billions of years ago.
Wayne:
--- Quote from: wdj on August 05, 2008, 07:18:32 pm ---where two former universes collided.
--- End quote ---
Another possibility would be that two universes expanding and intersecting would not provide enough material to reach the critical mass necessary for a Big Bang. After all, they both resulted from their own Big Bangs, which must have occurred when they reached critical mass, and more than half of the material of those universes is heading either away from the intersection or out at a perpendicular or close to perpendicular angle.
So in that case maybe a third universe comes in as a trigger.
Probably don't need a fourth universe. :laugh:
Wayne:
--- Quote from: injest on August 06, 2008, 07:38:28 am ---why don't I ever discover something?
--- End quote ---
;D Well then here's what you should discover! See if you can discover another universe.
The strategy would be to look through the least hazy part of the shell of our universe. That would be the dark blue parts near the center and the right side of the big oval on the previous page.
Probly won't look like much more than a dot. One way you could tell if it's another universe, instead of a star or a galaxy in our universe, would be if it had a blue shift (meaning it's coming toward us) instead of a red shift (meaning it's going away from us). Everything in our universe has a red shift, because the whole universe is spreading apart.
Actually it probably wouldn't have a blue shift, it would just have no shift.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version