dude no one knows...
its no point unless some random *** alien or God himself comes down and explains everything...
take psychology... it'll open your mind to more stuff... even about being emo lmao... but seriously
2007-08-16 00:18:43
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answer #1
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answered by Anonymous
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We only know about the part of the universe we do see, and even then we do not understand everything.
Also, because the speed of light is finite, the further out we look, the further back in time it occured.
When we look at distant galaxies, the distance between them (and us) seems to increase at a rate that depends on their distance from us. If we "play the film backwards", we come to the conclusion that everything we see was all in the same spot some 13.7 billion years ago (13,700 million years).
This could be wrong (for example, the film may have proceeded differently than what we think). Except that when we finally detected light that was generated 13.4 billion years ago -- the cosmological background microwave radiation -- its properties fits exactly with the theory that something special occured 13.7 billion years ago.
Before 13.4, everything would have been so hot that light itself could not travel (the universe would have been opaque). Then, at 13.4 the temperature was just cool enough for electrons to join protons to form atoms: the electrons were no longer in the way of light photons and the universe suddenly became transparent.
When we combine the temperature at which this happens (this can be determined in a lab) with the rate of expansion of the universe (also based on observations), we can calculate that the average temperature of the universe today, 13.4 billion years later, should be about 2.7 K (-270.4 C or -454.8 F). And that is what we observe 2.725 K (see wiki ref. below)
When we look at "how can the universe have evolved from the time of the cosmic background radiation to today?" we develop certain theories that we can test by making observations of the distant galaxies (in other words, by looking into the past).
Once we understand that, we use the rules of physics to try and understand how the universe could have gotten there from before 13.4 billion years ago.
The best theory so far is one that says that everything we see started in an extremely tiny package (in volume) that had very high energy content (it is difficult to talk of density at that stage, because "matter" had not yet been created), equivalent to a temperature so high that we can't understand it.
In physics, even today, there is such a thing as a smallest possible volume. It is called the Plank volume and it is the volume of a sphere of radius 1.6 x 10^-35 m (a zero, a decimal point, 34 zeroes and a 1). This is a very small size. Anything smaller than that cannot be understood in physics (until someone discovers new rules).
At that time -- when the universe was of "Planck size" -- the temperature was the "Planck temperature" (more than 10^32 degrees -- a 1 followed by 32 zeroes).
What was the form of the universe before that time? Some believe that it had just evolved from a point (volume 0) or from an area (volume also 0). Both would be singularities: objects of volume zero.
The theory called Big Bang goes with the point origin. The other possibility talks of " 'branes " (from the word "membrane" to represent an area embedded in a space).
However neither theory can go back before the Planck time (a little over 10^-45 seconds -- 0, decimal, forty-four zeroes, then a 1).
It is possible that there was, literally, nothing (not even space nor time). It is possible that there was some kind of space where a "fluctuation" cause the apparition of energy which suddenly expanded (and we are inside this expansion), it is possible that there already was a universe where membranes of energy collided and we are the result of that collision. We do not know.
The simplest theory (so far) that can explain everything we observe is the one called Big Bang. And when scientists are faced with more than one theory that explain things equally well, then they take the simplest. It does not mean that the theory is true, simply that it is more useful.
For example, there was one theory that explained what we observed about a century ago and it was simpler than the Big Bang. It was called Steady State. Then radio astronomy came along, made discoveries that could not be explained by Steady State but which had been predicted by Big Bang, so Big Bang became the prefered theory.
Don't forget: a theory is only a tool, It is neither 'true' nor 'false'. It is simply more useful or less useful. Right now, Big Bang is the most useful.
By the way, these fluctuations where energy appears out of nowhere are observed in the universe even today. In almost all cases, there is only just enough energy to create an electron and an anti-electron that come into existence for a fraction of a second then they cancel each other out again. So that over some period of time, the result is zero (start with nothing, end up with nothing, therefore no rule of physics was broken). It is this principle that allowed Hawking to talk of black holes "evaporating" (Hawking radiation).
Maybe the entire universe was one of these fluctuations, just with lots of energy. We'll find out in another 50 billion years...
2007-08-16 08:29:09
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answer #2
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answered by Raymond 7
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We know some type of big bang occurred since we are here.
There was nothing before it,but the nothing had to have a potential and the potential had to be finite or it would have stayed a potential nothing for eternity.
Some way this potential triggered a single space-time pulse,of minimum size and duration that had all the ingredients required to evolve into a universe like ours.
The universe is finite so it must have a maximum size and this size is about 6 billion light years in radius.
It could be older than 6 billion years but one day it will come to an end.
2007-08-16 08:12:41
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answer #3
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answered by Billy Butthead 7
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How can space be so big? Because it's had almost 14 billion years in which to expand. Given that immense amount of time, and the fact that space itself can warp faster than the speed of light, it's no surprise that today's Universe is so vast.
No-one knows what caused the Big Bang, but one of the most popular theories is the idea of the "Multiverse" in which big bangs happen all the time, and our universe is but one of many. Of course, that doesn't explain where the multiverse came from but then that could simply have existed for an infinite amount of time.
2007-08-16 08:11:20
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answer #4
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answered by Anonymous
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No one knows where big bang comes from because when big bang occurred all of the rules of world has changed. for example there was not any time or rules so we say big bang is the start of time. But it doesn't mean nothing was before big bang. we just cant know because we haven't any photon which comes from before big bang. and the space is going larger and larger with a high speed after big bang so now it's so big
2007-08-16 07:27:26
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answer #5
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answered by s.m 2
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There was no space before creation. If we wish to elaborate on the space that was available prior to the big bang, astronomers tell us that the whole space that was available prior to the big bang was only of the size of an electron; can you imagine that? Well All the matter that existed in space now was condensed in that volume - That space that is as big as the electron, that's how dense was the universe before the big bang. The start of space expansion began within the 10^-41 second of the big bang. Can you imagine that too? Now the expansion of our universe started during that fraction of that second that blew up all the matter that we have now in the universe. Can you imagine that too?. I think you and I have great deal of imagining to do before I finish answering your question which you just had to post, notwithstanding that all the answers that you shall get are the understanding that each and every one of us including you have for the universe in which we live. There is nothing wrong with asking that question; no absolutely not. Questions like that make us think in the very depth of the creation of our universe - after all it is our universe. But as we try to put our understanding before you and those who read, we try to be very cautious not to make ourselves fools when answering this great question. We should rather sharpen our thinking and try to really postulate a theory based on the data that we have. When Einstein was given his noble prize, he was interviewed by someone representing a science magazine. He was asked by the journalist to tell the new generation that will be the van guard of humanity, to tell them about the amount of knowledge he accumulated before he published his theory of relativity. Every one knows that Einstein was a great thinker and a great physicist. He let his mind go into space that no man has gone before (Hey I am beginning to sound like Jim Kirk). Einstein said in his reply to that journalist that he truly came to understand that he knows nothing. He explained that by saying that "Every time he comes to understand a certain behavior that exists in the universe, he also comes to understand how much more behaviors that exist out their that he does not understand" (Now I begin to sound like Fox Molder). Einstein finally told the journalist that he truly came to understand that he knows nothing. Can you imagine that? Another imagination to think about! To make my answer short, all the data that are available in our hand are not sufficient to understand how the universe and space came about. That is it..
2007-08-16 08:33:52
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answer #6
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answered by lonelyspirit 5
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No one knows for sure, but it is expected that gravity wells (black holes) eventually gain strength and draw all matter and mass back and become one huge sinularity fall in on itself until natural fusion occurs and then the bang happens.
2007-08-16 08:44:11
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answer #7
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answered by Anonymous
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LOL i asked this to myself plenty of times and have come up with 3 answers
1.its the secret to the universe
2. no one will ever know
3.its ethier god ,aliens, or particles that created everything
2007-08-17 02:33:13
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answer #8
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answered by Anonymous
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