The big bang theory suggests that the origin of the universe began with that exploded and expanded?

Answer 1

Because, I think, the universe, its main purpose is to destroy its self. When that time comes everything will collaspe and there will be an implosion. A) leaving a black hole in the empty darkness. B) having nothing there.

Answer 2

Those that would have you believe the Bang Theory state that the universe continues to expand because of the initial explosion that took place and since there is no gravity in space, or a force to cause the deceleration of it's original motion from the explosion that it will continue to expand for ever. They say that nothing existed before the big bang and all this nothing got together into a tiny little ball and started spinning REALLY fast and moving around in itself and it created enough force for all this nothing to explode and turn into everything. If nothing existed then where is it expanding to.

The above paragraph is complete rubbish.

1) The Big Bang was NOT an explosion of matter into empty space -- it was an expansion of all space, everywhere. Matter is simply going along with this expansion and, to some extent, slowing it down.

2) There was no "tiny ball" that became the entire Universe. What is now the "observable Universe" -- ie, that infitesimally small part of our entire Univere that we can presently see -- was, indeed, a tiny ball. But the Universe as a whole may always have been infinite in size, and is now continuing the expansion it began long ago.

3) "They say that nothing existed before the big bang and all this nothing got together into a tiny little ball" Absolutely false. The Big Bang makes no statement about what happens PRIOR to the expansion that continues to this day. Scientists don't say "nothing" existed prior to the Big Bang, they only say they don't know what existed prior to that -- just like they say they don't know why there is lightning in the clouds.

4) "started spinning REALLY fast and moving around in itself"

Completely and absolutely false description of the Big Bang.

5) "it created enough force for all this nothing to explode and turn into everything"

See above comment.

6) "If nothing existed then where is it expanding to."

When you learn to do cosmological mathematics, you will learn that a Hilbert Space can expand by itself, without "something" that it can expand into.

Answer 3

Simple answer: we don't know why.

Complicated answer; we don't know why, and we can't even be certain that the universe IS expanding. The universe is about 13.5 billion years old; we're stuck here on one planet in one solar system, and we've only been seriously paying attention to this stuff for a hundred years or so. Astronomers had been studying the precise colors of the light from distant stars when they realized that by analyzing the doppler shift in the absorption spectra, they could calculate how fast the stars were moving either toward us, or away from us.

It was something of a shock when they discovered that most of the distant stars were (or appear to be!) moving AWAY from us. There are some, like the Andromeda galaxy, which is getting closer; in fact, it appears that the Milky Way and the Andromeda Galaxy will probably collide in about 4 billion years or so. But the REALLY distant stars are moving away - and the further away they are, the faster they seem to be going!

Astronomer Edwin Hubble developed a theory in which the universe is expanding; "inflating", he called it. This actually ties in with the theory of the Big Bang, which states that the universe began from a single point of infinite density, and it exploded to form everything that is now in the universe.

But there are some interesting glitches in the way that all the theories interact, and it is entirely possible - almost certain! - that some future physicist will figure out more completely how the universe began and is proceeding. (They'll probably look back at us and think "How could they have been so foolish?")

And there are, currently, ENORMOUS gaps in our knowledge and understanding. Let me give you one example, out of thousands or millions; Gravity. We don't know how it works. We don't know how it makes its effects felt. Light has photons, which have no mass but a definite speed; is there such a thing as a "graviton", and if so, at what speed does it travel? Can it be deflected or shielded? Do "gravitons" have mass, can they be created or destroyed or converted into other forms of energy? Do photons REALLY have no mass at all, and is the speed of light REALLY constant for all times and places?

Be prepared to learn some AMAZING things in the future!

Answer 4

Not exactly. The theory posits a single center, not multiple ones, and it wasn't really an explosion in the normal sense of the word. However, as a picture, it's pretty close: the very early universe was very small and very hot, and it got a lot bigger and cooler quickly, which is pretty similar to an explosion.

Answer 5

1) Calculations, using the General Theory of Relativity, that a static Universe can't be stable; it would eventually have to expand or contract.

2) Actual observations of galaxies, using the Doppler effect, show that the farther away a galaxy is from us, the faster it is moving away from us.

Answer 6

The redshift of distant galaxies, attributed to the Doppler effect.

Wherever we look, galaxies in every direction are receding from us,

and the farther any galaxy is from us now, the faster it's receding.

Answer 7

The farther away a galaxy is from earth, the greater the red shift. This fact indicates that the rate of expansion of the universe is increasing. All galaxies have a red shift and also indicates that the universe is expanding in all directions.

Answer 8

It's similar to the Doppler effect (the effect that cops' radar speed traps use).

Scientists have found that the wavelengths of light from distant galaxies have been "stretched". That means the color of the light is "redshifted" in the direction from blue to red.

The further away a galaxy is the greater the change in wavelengths. The size of change in wavelength is proportional to the speed with which galaxy is moving away. This is why scientists say the Universe is expanding.

This redshift is called the "cosmological redshift". It's not really a Doppler redshift.

This effect is believed to be caused by the expansion of space itself.

Answer 9

Because there is not enough dark matter out there. The universe appears to be still expanding because of the force of dark energy.

Answer 10

Yes - that's what it is all about.