You mean where was it localized, or what was there before the big bang? Here is a cosmologist's answer from the link below.
"You may have heard something of Einstein's contributions to physics, in particular his theory of relativity. He introduced many unusual and counter- intuitive concepts that derived ultimately from simple, almost child- like thought experiments. One of his contributions was showing that, in a Universe with no matter and no energy, time itself ceases to exist. Now, one corollary of this that comes into play as far is the Big Bang is its location. Some think of the Big Bang as a localized and very powerful explosion. This is not quite accurate. All things that exist now or ever existed in the past were also present, although perhaps in different form, when the Universe was created. Therefore the Big Bang occurred everywhere all at once. You could not assign a location to it. The Big Bang was not so much an explosion really as the start of a great expansion, which continues even now. The rate of expansion would appear to be roughly the same, aside from local anisotropies, no matter where in the Universe you are."
Aloha
2006-10-05 06:37:07
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answer #1
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answered by Anonymous
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Big Bang Cosmology
The Big Bang Model is a broadly accepted theory for the origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few millimeters across. It has since expanded from this hot dense state into the vast and much cooler cosmos we currently inhabit. We can see remnants of this hot dense matter as the now very cold cosmic microwave background radiation which still pervades the universe and is visible to microwave detectors as a uniform glow across the entire sky.
Foundations of the Big Bang Model
The Big Bang Model rests on two theoretical pillars:
General Relativity
The first key idea dates to 1916 when Einstein developed his General Theory of Relativity which he proposed as a new theory of gravity. His theory generalizes Isaac Newton's original theory of gravity, c. 1680, in that it is supposed to be valid for bodies in motion as well as bodies at rest. Newton's gravity is only valid for bodies at rest or moving very slowly compared to the speed of light (usually not too restrictive an assumption!). A key concept of General Relativity is that gravity is no longer described by a gravitational "field" but rather it is supposed to be a distortion of space and time itself. Physicist John Wheeler put it well when he said "Matter tells space how to curve, and space tells matter how to move." Originally, the theory was able to account for peculiarities in the orbit of Mercury and the bending of light by the Sun, both unexplained in Isaac Newton's theory of gravity. In recent years, the theory has passed a series of rigorous tests.
The Cosmological Principle
After the introduction of General Relativity a number of scientists, including Einstein, tried to apply the new gravitational dynamics to the universe as a whole. At the time this required an assumption about how the matter in the universe was distributed. The simplest assumption to make is that if you viewed the contents of the universe with sufficiently poor vision, it would appear roughly the same everywhere and in every direction. That is, the matter in the universe is homogeneous and isotropic when averaged over very large scales. This is called the Cosmological Principle. This assumption is being tested continuously as we actually observe the distribution of galaxies on ever larger scales. The accompanying picture shows how uniform the distribution of measured galaxies is over a 30° swath of the sky. In addition the cosmic microwave background radiation, the remnant heat from the Big Bang, has a temperature which is highly uniform over the entire sky. This fact strongly supports the notion that the gas which emitted this radiation long ago was very uniformly distributed.
These two ideas form the entire theoretical basis for Big Bang cosmology and lead to very specific predictions for observable properties of the universe.
Accordingly to above, these are just postulations attributed to the Big Bang Theory.
2006-10-05 06:47:25
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answer #2
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answered by rosieC 7
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The Big Bang happened everywhere - before the Big Bang, all of space, the entire universe, was in one point. Read that again - all of space. Space itself was in one point, with nothing outside of that point. Don't think of the Big Bang as some sort of explosion that happened at a location, it wasn't. (The name "Big Bang" was actually a derogatory one used by a scientist who was strongly opposed to it.)
Here's what I tell my students all the time: If it doesn't make your brain hurt, you don't understand it.
2006-10-05 15:49:44
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answer #3
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answered by kris 6
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There is no way- the universe is endless. Also the big bang theory is false. It began from an array of cosmic eggs.
2006-10-05 06:39:00
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answer #4
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answered by Fredrick Carley 2
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We started off just like mars. We grew, evaluted, and grew into the magnificent amazing spoiled ignorant creatures we are now.
2006-10-05 06:39:57
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answer #5
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answered by Anonymous
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