Posted on 02/10/2011 1:21:07 AM PST by LibWhacker
Our Universe is an enormous place; that’s no secret. What is up for discussion, however, is just how enormous it is. And new research suggests it’s a whopper – over 250 times the size of our observable universe.
Currently, cosmologists believe the Universe takes one of three possible shapes:
But what if the Universe turns out to be closed, and thus has a finite size after all? Cosmologists often refer to the Hubble volume – a volume of space that is similar to our visible Universe. Light from any object outside of the Hubble volume will never reach us because the space between us and it is expanding too quickly. According to the team’s analysis, a closed universe would encompass at least 251 Hubble volumes.
That’s quite a bit larger than you might think. Primordial light from just after the birth of the Universe started traveling across the cosmos about 13.75 billion years ago. Since special relativity states that nothing can move faster than a photon, many people misinterpret this to mean that the observable Universe must be 13.75 billion light years across. In fact, it is much larger. Not only has space been expanding since the big bang, but the rate of expansion has been steadily increasing due to the influence of dark energy. Since special relativity doesn’t factor in the expansion of space itself, cosmologists estimate that the oldest photons have travelled a distance of 45 billion light years since the big bang. That means that our observable Universe is on the order of 90 billion light years wide.
To top it all off, it turns out that the team’s size limit of 251 Hubble volumes is a conservative estimate, based on a geometric model that includes inflation. If astronomers were to instead base the size of the Universe solely on the age and distribution of the objects they observe today, they would find that a closed universe encompasses at least 398 Hubble volumes. That’s nearly 400 times the size of everything we can ever hope to see in the Universe!
Given the reality of our current capabilities for observation, to us even a finite universe appears to go on forever.
Well, this will negatively affect real estate prices.
LOL
That’s just great. I’m already upside down.
On the other hand, how could there be an infinite universe?
Either way, I get dizzy just thinking about it.
Age of universe = 13.75 years
Photons have traveled = 45 billion light years
Speed = Warp 3?
What this means is that there are physical limits to what we can know. Will the insight provided by this article humble our central economic planners? No chance.
It’s because the universe expanded (faster than c) and those photons got a free ride.
Nah, 249 times, tops.
Not counting the crawl space.
Location, location, location. A nice little ocean front property on a planet with oxygen, water and moderate tempratures, near, but not too near, a yellow star is going to be worth a lot more than undeveloped space trapped in a time warp near a black hole in some God foresaken corner of a remote galaxy cluster. Especially if the proptery has access to a reliable airport and a stable government.
Currently, cosmologists believe the Universe takes one of three possible shapes:
* It is flat, like a Euclidean plane, and spatially infinite.
* It is open, or curved like a saddle, and spatially infinite.
* It is closed, or curved like a sphere, and spatially finite.
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Correct answer is all three - it just depends on one’s state of mind and which direction one heads out in.
At least we have universal wrench sets that will work everywhere.
This topic is worth thinking about 30 seconds, otherwise you go to brainlock.
No wonder it’s taking me longer to drive to work each morning.
What about Michelle’s rear end?
Okay... then what would this closed, finite-sized universe be floating in? A petri dish sitting under somebody's microscope?
My vote is that it is spherical with infinite space in all directions.
The Restaurant at the End of the Universe?
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