I believe that in cosmological terms, we are leaning more towards a flat or open universe than a closed universe. A closed universe in general relativity is finite (but unbounded, like the surface of a sphere) and will eventually collapse, while a flat or open universe is infinite with no future collapse. At present, an infinite universe seems more likely.
The age of our universe does limit how far we can see as light takes time to get to us. However, the expansion of the universe also sets a limit since beyond a certain distance, things travel away from us faster than light speed. This doesn't violate special relativity, since the intervening space itself is expanding.
The apparent acceleration of this expansion means the boundary of the observable universe will likely be decreasing rather than increasing with time.
2006-10-18 11:11:48
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answer #1
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answered by SAN 5
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Well, considering that light travels only so far per year, the further distant a star is from us, the further back in time we're looking when we view it. For example, Alpha Centauri, our closest neighbor, is roughly 4 light years away. The light we see when looking at Alpha Centauri was light that left that star some 4 years ago. Hence, when we're looking at galaxies hundreds of millions or even billions of light years away, we're seeing the light that left those places that many years ago.
Scientists speculate that the universe is between 12 and 15 billion years old. As a result, you're not going to be able to view anything further out than say 12 billion light years away, or maybe less, as it took awhile before stars began to form after the big bang.
2006-10-18 08:31:46
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answer #2
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answered by Anonymous
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There are different colleges of technological expertise that say at the same time as the universe is countless (because it ever expands and also you are able to't in any respect capture the enlargement) mass and skill is in a finite furnish in any respect situations as area expands notwithstanding the internet fee of mass and skill remains a similar (in spite of the actual incontrovertible truth that the internet fee is a lot) when you consider that there are (in accordance to maximum recognized theories) a restricted volume of debris in the universe it would want to come right down to counting, yet because you initially suggested there are two times as many apples it would want to signify, for a finite mass universe, there are extra apples. For the idea that there is countless mass in the universe it would want to signify there is an equivalent volume of apples and bananas, countless. it is your answer, infinity does no longer follow mathematics logical kinds, 2 infinities are continually a similar volume no count number the way you multiply or upload it.
2016-12-04 23:28:31
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answer #3
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answered by degennaro 4
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I totally agree with you, no one has the right to say that the universe is finite, with all of those universes out there there could only be space and more space, it does not end, just because we are finite beings and that our lives has an end it does not mean that the universe as well has to have one, but that is just the way that we are programed to think because we have being given by nature just a few concept to work with such as the concept of time and reality, but nature has not given all to us because obviously it is doing things that will take us million of years to figure out, so definitely, we are not smarter than nature, whether one believes in a God or not, it is just factual, the universe is not finite it is just our concept as humans because our lives has an end so we think that it must be the same for the universe, but it doesn't work that way, I'm sorry if we are limited, but the universe is not.
2006-10-18 09:11:50
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answer #4
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answered by Halal Pig Ok in Islam 4
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A lot of things we know start of as theories and are confirmed by observation later, if ever.
One thing is that the further out you go, the faster the galaxies are moving away. So, that is limited by our current understanding that nothing can exceed light.
Also, bear in mind that nobody has seen electrons, but we use electricity based on electron theory. So, you don't have to observe things for the theory to be true.
2006-10-18 08:26:04
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answer #5
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answered by nick s 6
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As I understand it, the Universe is infinite - at least there is no edge to the Universe. There is an edge to our *observable* universe, however, because light takes time to travel and our Universe has only been around for a finite period of time. But we fully expect that there are things beyond our observable universe that will come into view in time.
2006-10-18 08:42:19
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answer #6
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answered by kris 6
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That's actually true. I think it's the human kind of thinking that must "contain" things, or in this case put a definite "end" on them, in order to understand them.
But yeah, it's a given that it is so vast that it will be never, ever be fully completely known but yeah, no one knows if it does definitely end. They used to say everything revolved around the earth so you see how theories go...
Good question, makes for good thinking
2006-10-18 08:26:02
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answer #7
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answered by Ivy G 2
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The theory that the universe is infinite was purely theoretical, but can now be proven with some form of mathematics (maybe calculus?). You can argue that the universe in finite, but most scientists would just laugh at you.
2006-10-18 09:59:24
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answer #8
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answered by trainkid22 2
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A lot of things pertaining to cosmology are jus educated guesses and mathematical models and extrapolations based on what we know.
They could be incorrect, partially incorrect, partially correct, or correct. We simply don't have a way to test a lot of the theories.
2006-10-18 10:52:53
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answer #9
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answered by minuteblue 6
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no one has the justification to say it
that is why there are just theories
some have an infinite universe
some have a finite universe
2006-10-18 08:22:24
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answer #10
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answered by Greg G 5
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