Originally posted by Ruppster1Nobody knows what caused the big bang.
To any serious physicists out there, I have a question.
What caused the Big Bang, and why ( thankfully) has it not occurred again? The evidence for the event is very compelling, but I have never heard a good reason for the cause.
Some say it is ocurring again all over: Some inflation theories.
And to the person who talked about the big crunch. We still don't know if it's going to happen. It depends on the matter distribution of the universe and by all measures for it seems to indicate that space will stretch out for ever and reaching infinity with zero velocity.
Originally posted by Ruppster1The gods asked themselves what the next BIG thing would be and they agreed to have a BIG BANG...
To any serious physicists out there, I have a question.
What caused the Big Bang, and why ( thankfully) has it not occurred again? The evidence for the event is very compelling, but I have never heard a good reason for the cause.
More earnestly: The question what caused the big bang is not allowed. This means there is no asnwer which we can deduce. This is because our theories are based on what we can observe and we cannot observe things infiintly near the big bang,.. things become very strange when condensing the matter of the universe ina tiny droplett anyway (oh and nobody knows how far the compression actually went.
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Originally posted by ArrakisNo, sorry my friend. Black Holes don't emit anything. Quantum theory requires that particles "popping in and out" have to pop out in pairs. Typically they destroy themselves very quickly, of course, and "pop back out" in pairs as well. However, if a pair of particles pop out near the event horizon of the hole, it's possible for one to fall in and the other not. The one that doesn't is Hawking radiation.
That's not quite what quantum theory states my friend (either that or you gave a poor example). Quantum theory suggests that particles are popping in and out of our universe. Hawking radiation is not a creation of new particles, but energy being expelled from a black hole. Hence the particles are not 'created' but rather energy is being transformed.
Regar ...[text shortened]... . Here's just one of many:
http://www.sciencedaily.com/releases/2005/10/051029100150.htm
You're link, I think, is wrong, btw... it pulls up an irrelevant article..
Originally posted by SickboyI realize that it is pure speculation, it is like asking what happens to all the matter that gets pulled into a black hole. Is simply gone from the universe? What little I understand about black holes is that anything inside no longer has meaning to this universe. This seems to me to be a violation of the conservation of matter and energy.
IANP, but I do a fair amount of reading as physics interests me... The question you're asking is essentially unknowable (at least by Science anyway). It's a bit like being in a bubble where you can't see, hear, or otherwise sense anything outside of that bubble or even perceive the actual bubble itself. How are you supposed to determine how that bubble wa ...[text shortened]... ... Might as well postulate it's the Tooth Fairy's 3-yr old kid blowing bubbles....
Originally posted by PonderableI think the question is perfectly valid especially if there is any possibility of happening again. Can you imagine what that would do to our universe?
The gods asked themselves what the next BIG thing would be and they agreed to have a BIG BANG...
More earnestly: The question what caused the big bang is not allowed. This means there is no asnwer which we can deduce. This is because our theories are based on what we can observe and we cannot observe things infiintly near the big bang,.. things become ...[text shortened]... he universe ina tiny droplett anyway (oh and nobody knows how far the compression actually went.
I have heard that speculation is that the universe was compressed to something smaller than an atomic radius. It is hard for me to imagine something the size of the universe being so compresssed.
Originally posted by GinoJRecent discovers by astromomers seem to point to something else. The expansion of the universe seems to be speeding up instead of slowing down as was expected. If there is an end to the universe it will be the slow cold death scenario.
It will occur again but backwards. It's called "Big Crunch".
http://en.wikipedia.org/wiki/Big_Crunch