THE BIG BANG-ORIGIN OF THE UNIVERSE

How and when did the universe begin? No other specific question is more fundamental or provokes such spirited debate among researchers. After all, no 1 was around when universe was begun, so who can say what happened?

THE BIG BANG
Since early part of 1900s, one explanation of the origin and fate of the universe, the Big Bang Theory, has dominated the discussion. Proponents of the Big Bang maintain that, around 20 billion years ago, all the matter and energy in the known cosmos was crammed into a tiny, compact point. In fact, according to this theory, matter and energy back then were the same thing, and it was impossible to distinguish one from the other.

Adherents of Big Bang believe that this small but incredibly dense point of primitive matter/energy exploded. Within seconds fireball ejected matter/energy in all directions at velocities approaching the speed of light. At some later time maybe seconds later, maybe years later energy and matter became separate entities. All different elements in the universe today developed from what spewed out of this original explosion. 


Big Bang theorist claim that all of the galaxies, stars, and planets still retain the explosive motion of the moment of creation and are moving away from each other at great speed. This supposition came from an unusual findings about our neighboring galaxies. In 1929 astronomers Edwin Hubble, working at the Mount Wilson Observatory in California, announced that all of the galaxies he had observed were receding from us, and from each other, at speeds of up to several thousand miles per second.      

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