I want to hear opinions on the Big Bang theory, and any other scientific theories regarding the creation of the universe. Anyone who mentions 'God' will be summarily executed. There are enough arguments and theories within science without bringing theology into this.
OK, The Big Bang. This is my understanding, so please feel free to point out any flaws and correct my logic or ideas.
In the beginning, all matter and energy was contained at a single point. This was no bigger than a pin head. There was nothing else but this. It was the entirity of existence. It was everything.
The concentration of this power in such a tiny space caused the explosion which we call the Big Bang. All the matter and energy was released in this explosion and the universe was created over the millennia since this event. Now, here comes the purlely AzH theoretical bit. I haven't researched this (much) and it's just my basic ideas:
The explosion caused the universe to expand, and it continues to expand. But just like the earth is slowing down due to gravitational forces, the expansion of the universe is slowing too. Eventually, who knows when, the universe will stop expanding and will begin to retract. Gravity will cause this retraction to increase in speed and eventually all the material in the Universe will rush back to the point of origin. The arrival of all this matter and energy in such a small space will cause a huge explosion (the Big Bang) and the universe will be formed again.
This process will continue for eternity; infact, we could be the nth universe to be born by this system.
How much of that actually makes sense? How much is grounded in scientific theory? Please give me your thoughts and opinions.
I didn't make it!
That is actually how I look at it. I do not think the matter you speak of was as small as a pin-point. However, I think it was a very small, extremely dense ball of matter. The energy in this ball is too much to contain. Therefore, like a bomb, the energy exploded ******ds, and it continues to expand as a bomb would. I would think of it as a super bomb. When bombs explode, the energy spreads out in all directions. But eventually it stops expanding. However, the energy from a bomb stops expanding because of gravity. There is no gravity in space, or at least not enough to stop a super bomb from expanding. This leads me to believe that there is matter outside of our universe. Like AzH said, our universe should collapse on itself, not because of forces inside our universe, but outside. Edit-Where it has the ******, I think that is there because I put out w a rd's.
Voice of joy and sunshine
26th May 2003
My theory is called, "vacuum theory," it goes that under the second law of thermo dynamics, (everything trying to equalise, sometimes thought to be entropy,) when there is nothing, there is perfect balance, however you cant have nothing in a universe entropy doesn't allow for it, so the universe became unbalanced, so time converted into energy to fill the void, now to create a universe requires infinite energy and so all of time up to that point was converted into energy and as time always has been, there was enough, hence the big bang.
Wanna go Double Dutch?
9th December 2003
I have to agree with Gén0CýDé, it al began with one huge collection of matter, it exploded and all this pieces of matter spread and planets where formed by this matter (Just like stars implode, leave matter and then change into other planets and stars).
Some of this matter formed or contained cells which turned into multi cell beings which evolved into even bigger and more complex things like humans.
If the universe will ever implode? i don't know, it sounds strange but it could happen, i would have to do more research to form an opinion on that.
ok then physics here we come.
there is one theory that i particularly know of. a basic idea is if you have a room which is filled with air or any specific gas, you would expect it to be evenly distributed around the whole room and due to probability this is normally nearly true, BUT it is possible for all of the atoms/molecules to congregate into the corners of the room. this would really screw over anyone in the room but hey its possible but highly unlikely.
apply this to whatever came before the big bang. this is a spaceless, timeless and matterless place. due to probability eventually something will destabalise and there will get to be a higher concentration of energy. this causes a chain reaction creating matter and time and space. for those of you that think it is impossible it IS possible to create matter. you most probably know the famous equation E=mc^2 this says that Energy (in joules) = mass (in kg0 times the speed of light squared (in m/s). therefore it is possible to create matter but it revires energy to do so. also matter can be destroyed BUT it is transformed into energy.
so this universe may all be due to slightly more energy being in one place than another ( ie due entirely to chance)
ok now onto matter being produced. when you create matter there is something you must take into consideration. this is that when you make a particle you must also create an anti particle. an example is in beta decay:
when a particle decays in one particular way it emmits 2 particles the first being the beta particle (which for those that dont know is an electron and the anti-particle that is emitted is an anti-neutrino) yet if you are creating completely new particles out of pure energy pair production must take place. this means when you create one particle then its anti-particle must also be created. in the case of an electron this would be the positron. these may then carry on unhindered but on earth as we have so much matter the positron would anihalate with some other particle. thus at the beginning of the universe this would have been happening rampantly.
stay tuned for the next exciting chapter of "the beginning of the universe and asorted physics stuff"
(this will be better if/when i find my physics textbook. w00t go A2 physics)
7th March 2003
Some time ago I read a quite interesting theory in the Danish magazine Illustreret Videnskab (Illustrated Science) which goes as follows (as far as I remember): The Universe has always existed in some form so no need to talk about 'before the Big Bang there was nothing (or very little)'. Our universe is tied to a parallel universe; don't ask my what the glue is though... The two universes are expanding in diameter while moving away from each other (still glued to each other...). At some point they cannot expand any further, nor can they move any further away from each other. Therefore, they are pulled towards each other at great velocity. Think of it as pulling in the ends of an elastic band, and when you cannot pull the ends any further apart, you release them. Now the two universes come crashing into each other with an extreame velocity, and hey presto! we have a big bang. The process then begins all over again and this back-and-forth continues in all eternity, creating new universes at regular intervals.
I found this image on the homepage of the magazine. I know it is small but you will get the general idea.
I'm way cooler than n0e (who isn't though?)
14th April 2004
i've read the same in a magazine as dreadnought says but not at extreme velocities but as slowly as the galaxies are moving away today and eventually they will attract each other and the big implosion or some thing will occur
I tink the universe has always been, and always will be. it is too much for us to fully comprehend it. this big bang theory doesn't work. for instance, you say "In the beginning, all matter and energy was contained at a single point. This was no bigger than a pin head. There was nothing else but this. It was the entirity of existence. It was everything." it could not have been the beginning of everything. everything has a cause and a consequence. what caused this matter, space and time to exist in the first place? it doesn't make sense, because all matter and space and time was created AFTER the big bang, so therefore, there could not have been any matter or space or time in wich this big bang could even take place.
17th June 2002
Well, I think that God... uh oh. What? No, no, no, not the *BLAM THUD*
Hmm. Thank God for reinca... no, aw crud. *BLAM THUD*
Hmm. Anyway. I don't think the universe was ever created. I think it has always been, and shall always be, right where it is. That's not to say that any of these expansion and contraction theories are invalid. On the contrary. I think you could use any one of them to explain how the universe 'pulsates'. Expands and contracts, over extremely long periods of time. But when it contracts, that doesn't destroy the universe, though it probably does some damage to most things in it. And when it expands, it's not being created from nothing. It just 'pulsates', if you see what I mean.
Humans are preoccupied with creation and destruction because it is the essence of their own existence. We are created, then we are destroyed. So we try to apply it to everything. But I don't think it can possibly be applied to the universe. There has always GOT to be SOMETHING, because you can't create something out of nothing. And that would be nothing at all, not time, not energy, nothing. So even if it hasn't always been the universe as we know it, I think it and possibly others like it have always existed, and always will.
Yeah, the big bang theory does have some problems. Still: you could say that our universe was created with the big bang, and consider that ours is only of of millions and millions of other universes in the infinite multiverse. This solves one serious problem, namely: how can a universe have a border. (Answer: impossible, so it has to be infinite)