THIS IS HOW THE BIG BANG WAS CREATED
- Thread starter BOB D.O.L.E
- Start date
Sponsored Links
But what's the wall made out of? And did the builders get any overnight money for working at the edge of the universe.
Sponsored Links
joe-90 said:
General relativity predicts that, if there is sufficient mass in the universe, you could never reach the edge. It would be like trying to escape from a black hole. Despite your best efforts to travel directly outwards in what appeared to you to be a straight line, you would find yourself coming back in again.
But that's a rather big IF! There are actually three possibilities:
1) The universe is closed. There is enough mass in it to halt the expansion and it will eventually start shrinking again. If you try to leave you will fail.
2) The universe is open. It will continue to expand indefinitely - which doesn't help much because the second law of thermodynamics still applies. When all the original hydrogen has been used up there will be nothing left to make new stars.
A sufficiently advanced life form (or machine ) could survive a bit longer by dropping mass into dead stars - or they could leave. (To find what? )3) There is exactly the right amount of mass such that the universe expands indefinitely to a limit that it never quite reaches. For a crude analogy, try adding up the series 1 + 1/2 + 1/4 + 1/8 + ... and so on ad infinitum. The universe will not collapse back in on itself but the stars will still go out and you can't leave.
PS: All of this assumes that the Big Bang theory is the correct one. It's looking good at the moment. As far as I'm aware, nobody has ever observed a baryon (heavy particle) popping up out of nowhere or vanishing without a trace.
PPS: The creationists have their own theory, namely that a supernatural entity - let's call it God - made the whole thing quite recently but concealed its true origins.
That wouldn't be difficult; biologists do it all the time. But even this apparently unassailable theory is flawed because they cannot answer one obvious question: where did 'God' come from? 
- Joined
- 28 Oct 2005
- Messages
- 31,281
- Reaction score
- 1,997
- Country
They don't have to answer that question as the question is the proof that God exists. Take a look at the Universe and all the energy within it. It cannot be created or destroyed so must have always existed. Call that energy source what you like - but God is as good a name as any.
You mean like this:
"I think therefore God is."
That's not quite what Descartes said.
Actually, there's a fairly decent explanation for that one. The total mass could be balanced by the negative energy in its own gravitational field and so ---
"The universe is the ultimate free lunch." (Stephen Hawking).
ah but what about that bit thats missing?
explain than
The energy within the universe may have always existed, in some form.
But the universe can not have ALWAYS existed.
You - but your post got binned (as did my first reply
)Sponsored Links
