"They're going out, theory in hand,
selecting data which might support their belief.
According to Newton, and Charles Sanders Peirce, that's not proper scientific method."―Dan Mahony
The Big Bang Theory is a broadly accepted theory for the origin and evolution of our universe. It postulates that the observable universe started from an instantaneously expanding point, roughly ten to twenty billion years ago.
The hot Big Bang Theory is a broadly accepted theory for the origin and evolution of our universe. It rests on two seeming sound pillars:
In the hot Big Bang Theory, the observable universe began with an instantaneously expanding point, roughly ten to twenty billion years ago. Since then, the universe has continued to expand, gradually increasing the distance between our Galaxy and external galaxies. The expansion of the universe "stretches" light rays converting blue light into red light and red light into infrared light. Thus, distant galaxies, which are rapidly moving away from us, appear redder. This expansion also cools the microwave background radiation. Thus, the cosmic microwave background radiation, which today has a temperature of 2.728 Kelvin, was hotter in the early universe. Gravity slows the expansion of the universe. If the universe is dense enough, the expansion of the universe will eventually reverse and the universe will collapse. If the density is not high enough, then the expansion will continue forever. Thus, the density of the universe will determine its ultimate fate.
The hot Big Bang Theory is consistent with a number of important observations:
In its current form, the big bang theory is not complete. It does not explain:
Many cosmologists suspect that the Inflation Theory, an extension of the Big Bang Theory, may answer these questions.
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Last updated: Friday, 05-21-1999