In the big bang, everything should have spread out evenly, but it didn't?

Question

When the big bang happened, everything should have been the same size and would therfore have the same gravitational pull, everything should have expanded evenly, But obviously things clumped together to form galaxies and solar systems. I dont understand how this could happen. technically we shouldn't exist unless i'm missing something.

Answer 1

there is nothing that says all matter would need to be distributed equally. you mean to tell me that if you were to blow up a car with dynomite, all of the peices would be equal in size and distributed evenly around the blast site????? i very seriously doubt this would occur under any circumstance, especially the big bang....

just remember, the big bang theory is just that: still a theory. its a work in progress which will likely never be proved. however, i suggest you learn a little more about it....

http://en.wikipedia.org/wiki/Big_Bang

and you actually touched on something else: gravity. the clumping together you are curious about would depend heavily on the initial size/mass of the clumps and their relative proximity to each other.... gravity would do the rest locking them into orbits with each other or even causing them to collide and/or form larger bodies.

i think a more important question would be how does SO MUCH matter appear from no where, to be involved in the big bang. but then again, WE ARE HERE, arent we? lol... i suppose we will never know!!

Answer 2

That's a good question--and scientists spent quite a few years figuring out the answer. But in hindsight, its not really complicated.

What happened is that after the big bang, the "stuff" of the universe spread out RANDOMLY. We tend to think of this as meaning "evenly"--but it doesn't.

If you have any event that is "random"--in this case the pattern of dispersion of the stuff of the universe, the chances of a particular particle going in a particular direction are the same (randomness). But, any truely random system includes unpredictible variations--clumbpings in soe areas, relative emptieness in others.

Once the big bang occurred, and these random variations appeared, that's all it took to create the differentiations we see now. Those random clumpings, generating more gravity, became concentrations of mass linked by their own gravity--eventually forming galaxies.

Here's an expiriment to illustrate the point. Take a balloon filled with water (preferably round) and drop it from a window onto a concrete surface so it will burst (make sure no one's in range!). The water will disperse more or less evenly--but at random. If you look closely, you'll finde that the splash pattern isn't entirely even-more in this spot, less in another. Granted, that's a (VERY) crude model of the bigh bang--but you get the idea.

Answer 3

There's no way to prove that the Big Bang was a symmetrical explosion. Even minute differences in the spread of materials can result in large differences in "clumping."
Remember - for thousands of years after the event, the universe consisted of a cloud of hydrogen - each molecule affecting others by its' very small gravitational pull. Eventually, the clumping would occur, and the structures we see today - groups of galaxies, the galaxies themselves - are due not to the Big Bang dispersal, but to gravitational forces.

Answer 4

The unevenness of the big bang is proven by the clumpiness of the background microwave radiation left over from the big bang. The reason for the density fluctuations is found in a theory call inflation. Inflation is capable of producing small density fluctuations that can later in the history of the Universe provide the seeds to cause matter to begin to clump together to form the galaxies and other observed structure.

Answer 5

You aren't the only one who is missing something. The Big Bang supposition is the current darling of the theoretical astrophysicists. It replaced its predecessor darling, the steady-state theory of the universe only about 70 years ago and has no basis in fact. It is yet a hypothesis, not yet scientifically qualified to be a theory, but is awarded that status anyway.
Yes, technically you do exist so study what is observed, measured, explained and predictable. That is real science.

Answer 6

What proof do you have that if a big bang occured that everything (whatever you mean by that) should be the same size? And why do you assume an even expansion?

Since we do exist, you are missing something, or the big bang is not what you think it was.

Answer 7

We live in a quantum universe,for this reason the primordial space-time pulse was not perfect.
This produced a quantum effect that featured a small variation in the fabric of space.
Most were uniform but a small percentage were larger and smaller than the average.
This variation is what allowed the universe to evolve as it did.
If it had been perfect it could not be a quantum entity.

Answer 8

Even if things were homogeneous at some very early point (and very likely they were not) subatomic particles at relativistic speeds (a very high energy environment) will combine, leading to changes in the density of matter in the universe. These density differences are compounded when gravity further brings matter together.

Answer 9

on any explosion or implosion nothing spreads out evenly , please do your home work now.