George Lemaitre, struck the basic idea of the big bang in 1927; and George Gamow, R.A. Alpher, and R. Herman devised the basic "big bang" model in 1948. Though it was Gamow who popularized it, through campaigning enthusiastically and using cartoons to emphasized his details.
According to the big bang theory, in the beginning there was no matter, just nothingness. Then this nothingness condensed by gravity into a single, tiny spot; and it decided to explode!
That explosion produced protons, neutrons, and electrons which flowed outward at incredible speed throughout empty space; for there was no other matter in the universe.
As these protons, neutrons, and electrons hurled themselves outward at supersonic speed, they are said to have formed themselves into typical atomic structures of mutually orbiting hydrogen and helium atoms.
Gradually, the outward-racing atoms are said to have begun circling one another, producing gas clouds which then pushed together into stars.
These first stars contained only lighter elements (hydrogen and helium). Then all of the stars repeatedly exploded. It took at least two explosion of each star to produce out heavier elements. Gamow described it in scientific terms: In violation of physical law, emptiness fled form the vacuum of space and rushed into a superdense core, that had a density of 10^94gm/cm^2 and a temperature in excess of 10^39 degrees absolute. That is a lot of density and heat for gigantic pile of nothingness! (Especially when we realize that it is impossible for nothing to get hot. Although air gets hot, air is matter, not an absence of it.)
Where did this "superdense core" come from? Gamow solemnly came up with a scientific answer for this; he said it came as a result of "the big squeeze," when the emptiness made up its mind to crowd together. Then, with true scientific aplomb, he named the solid core of nothing, "ylem" (pronounced "ee-lum"). With a name like that, many people thought this must be a great scientific truth of some kind. In addition, numbers were provided to add an additional scientific flair: This remarkable lack-of-anything was said by Gamow to have a density of 10 to the 145th power g/cc, or one hundred trillion times the density of water!
Then all that packed-in blankness went boom!
This is only a theory. It all sounds so simple, just as you would find in a science fiction novel. And that is all it is. The theory stands in clear violation of physical laws, celestial mechanics, and common sense.
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