What is the "Big Bang"theory? What evidence do scientists have of it?

Answer 1

the big bang theory is that everything in the universe was compressed into a tiny ball of energy. that energy for some reason expanded (or exploded if you would like to call it that) and when it cooled to a few billion degrees it formed matter. thats the most popular view.

the original big bang theory didnt say what exploded, when, or why. it just said that since all galaxies seem to be moving away from some central point they must have all originated from that point.

there are loads of evidence to support the big bang theory, anyone who says otherwise is just ignorant and uneducated. some of the major evidence is

1. the fact that all galaxies seem to be moving away from a central point.

2. the cosmic microwave background. if the big bang theory isnt true there should be no radiation in space and it should have a tempurature of 0 K (- 270.3 degrees C or about -450 degrees F). but thats not the temperature. its about 3 K, the only explanation that we have for that now is that the radiation that causes the heat is left over from the big bang.

3. the fact that deuterium exists. its basically hydrogen with neutrons. the only known source is the big bang, we dont know of anywhere else it could have come from.

4. the abundance of light elements. the fact that the most abundant elements in the universe are by far hydrogen and helium directly support the big bang model. not only because they exist but because the big bang model correctly predicts how much of each element should exist.

Answer 2

No, there is no no no evidence for big bang as of now. Evidence is like 2 + 2 = 4, or DNA evidence, there is no more arguement and there is no evidence so far. In fact big bang proponents themselves accept that it is only theory.

They see few things in the universe and they are wondering whether they are due to big bang.

None of the observations so far definitely support big bang.

The galaxies moving away from each other, the back ground radiation, the presence of Deuterium, the background temperature of universe or space has nothing to do with big bang. No reason to belive that these things are present only because of big bang. There may be other explanations.

Or

May be big bang happened and may be only big bang could explain all these observations;

And that is fine with me. But in that case scientists should not claim that nothing existed before big bang. They should accept that nothing cannot create something. These many galaxies cannot be formed from nothing. Means there was something before big bang.

That means there was no beginning for universe. Also no end.

So big bang is not the beginning of Universe. Big bang may be the beginning of this or current universe.

There is a huuuuuuge difference between "Universe" and "current or this Universe"

In my opinion "Universe" always existed. No beginning or end. The "Current or This Universe" might have been created by big bang. Big bang may be a cyclical process in this infinte universe. Matter condenses and forms a small point - then expands or explodes- matter moves away from each other- then after sometime collapse- again form a small point - again expand or explode -- the cyclic process continues in my opinion.

Means big bang may be happening, but it is a process within the infinite Universe.

So big bang is not the creator of the infinite universe, rather it is a process happening inside the infinite Universe.

Answer 3

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The Big Bang Theory

Representation of the universe according to inflationary cosmology.
The Big Bang Theory is the dominant scientific theory about the origin of the universe. According to the big bang, the universe was created sometime between 10 billion and 20 billion years ago from a cosmic explosion that hurled matter and in all directions.
In 1927, the Belgian priest Georges Lemaître was the first to propose that the universe began with the explosion of a primeval atom. His proposal came after observing the red shift in distant nebulas by astronomers to a model of the universe based on relativity. Years later, Edwin Hubble found experimental evidence to help justify Lemaître's theory. He found that distant galaxies in every direction are going away from us with speeds proportional to their distance.

The big bang was initially suggested because it explains why distant galaxies are traveling away from us at great speeds. The theory also predicts the existence of cosmic background radiation (the glow left over from the explosion itself). The Big Bang Theory received its strongest confirmation when this radiation was discovered in 1964 by Arno Penzias and Robert Wilson, who later won the Nobel Prize for this discovery.

Answer 4

Big Bang is self explanatory. Everything we see in this universe came forth (evolved) from the mother of all explosions, some 15 or so billion years ago. It is most likely that time and space didn't exist (in the realm of our physics) before the existence of the singularity, from which all hell broke loose! We might never be 'allowed' to know the nature of events at time zero! Amazing stuff!!!

Evidence supporting some 100 year old equations came in the 60's when a team at Bell labs discovered a ubiquitous 'noise' throughout the heavens. It was later proven , beyond any doubt that this was the 'echo' of the BIG BANG!

Answer 5

Evidence in the world of science just as in a Court room is as good as the Judge or Jury interprets it.
The Big Bang theory is only a theory of the Creation of the Universe and nothing more.
There is difficulty believing that time had a begining or how long it took to assemble a Singularity together and then blow it up so it expends.That is the dilemma that causes a hung jury.

Answer 6

The big bang theory is that all matter on earth was compressed into a single tiny space, with infinate mass and density, and it "exploded" or quickly expanded outward.
As for evidence, I dont really know, but its something like that the universe is still expanding.

Answer 7

the big bang theory was how scientists think our universe was created. some thing about a star blowing up and then evolution then where we are today. i personally think its a load of crap because there is no evidence at all!

MERRY CHRISTMAS!!!

Answer 8

The idea that all matter in this universe came from a singular point of origin. There is no "evidence" of this being fact, but as we know our universe to be expanding ... flowing away from a central point, it makes reasonable sense.

Answer 9

It is a quite interesting theory of how the Earth and life itself began.