It's obvious that some sort of big bang event happened in the past for two reasons: 1) homogeneous and isotropic nature of the universe we observe
around us and 2) because the CMB radiation when plotted produces the signature of a black body spectrum.
Actually the 1st point works against the theory of the big bang a little bit but if you bring in the theory of inflation it tells us that at one point
all energy was highly condensed into a single point or sphere. The 2nd point tells us that what ever the big bang was, it started in perfect thermal
equilibrium as a highly ordered structure with no entropy at all.
In reality the big bang is probably nothing like what most people imagine it to be, like a huge explosion of energy or something which popped out of
no where... it was much weirder and much more abstract than a normal explosion. But it's fair to be worried about where the energy came from, because
some physicists do in fact say that the energy popped out of no where.
Especially quantum physicists, they will tell you that the energy of the universe was created by a huge random quantum fluctuation. Generally, the
only time that science allows energy to appear from nothing, is during the moment our universe was created. But they very much fear looking at what
happened before the big bang or what actually triggered the big bang.
They step around the problem by saying that nothing existed before the big bang, not even time. So they can say that at the very first moment of time
the tiny point of energy already existed and there was nothing before the big bang... time just started like that for no apparent reason. Obviously
that rationale is absurd and I wouldn't listen to anyone who argues such things.
If there was one big bang then it's impossible to say that it can't happen again. And if it can happen again than it must have already happened
before. There is no true start to time... thinking that our universe was created at the very start of time is some what akin to thinking that the
Earth is located in the center of the universe, it's an egocentric point of view.
The simple fact is that the energy had to come from some where, one way or another science must explain how the energy of the big bang was created,
otherwise we start to sound like religious people who like to claim that god has just always been there and we don't need to explain how he got there
in the first place, he just always was there.
I utterly refuse to promote such nonsense, I firmly believe there is a rational and logical solution to every problem. Even if some type of god does
exist there is a reason for why and how it exists. I'm a quantum mechanical guy myself so I tend to lean towards to concept of random quantum
fluctuations producing the energy of the big bang.
However I also take into consideration the theory of negative energy as described by Hawking and other scientists. The theory tells us that the big
bang actually created an equal amount of positive and "negative" energy, and when you combine the negative energy with the positive energy the result
is 0. So the average state of reality right now would be nothing.
The basic idea is that you can get energy from nothing as long as you have negative energy to balance it out. In my opinion this is the most promising
explanation for why we have a universe filled with stuff instead of absolutely nothing. The real question that concerns me is why does absolutely
everything in nature appear to be quantized and not fractal.
We were taught that you never get something for nothing. But now, after a life time of work, I think that in fact you can get a whole Universe for
free. ~ Stephen Hawking
edit on 5/9/2013 by ChaoticOrder because: (no reason given)