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Author Topic:   Big Bang... was it a science experiment?
Beercules
Inactive Member


Message 16 of 26 (97499)
04-03-2004 1:14 PM


No, it doesn't imply a finite universe. We really need a sticky FAQ on mainstream cosmology here.

Replies to this message:
 Message 17 by usncahill, posted 04-04-2004 4:21 PM Beercules has not replied
 Message 21 by Sylas, posted 04-05-2004 12:11 AM Beercules has not replied

  
usncahill
Inactive Member


Message 17 of 26 (97701)
04-04-2004 4:21 PM
Reply to: Message 16 by Beercules
04-03-2004 1:14 PM


how does it not imply a finite universe? if space and possibly time (different argument) were created by the big bang, did they expand instantly to infinity? or are you saying the space wasn't created by the big bang?

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Beercules
Inactive Member


Message 18 of 26 (97703)
04-04-2004 4:31 PM


The universe was infinite at the big bang and has been ever since. Expansion means the distance between points in empty space increases over time.

Replies to this message:
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RingoKid
Inactive Member


Message 19 of 26 (97710)
04-04-2004 5:36 PM


the universe as we know it or see it now didn't exist at the point/moment of the BB...

  
Beercules
Inactive Member


Message 20 of 26 (97757)
04-04-2004 11:18 PM


The standard model holds that the universe was a very dense place at the moment of the big bang. Under the classic singularity, this density is infinite. Not the mainly empty universe we know of today, but it was still around.

  
Sylas
Member (Idle past 5287 days)
Posts: 766
From: Newcastle, Australia
Joined: 11-17-2002


Message 21 of 26 (97767)
04-05-2004 12:11 AM
Reply to: Message 16 by Beercules
04-03-2004 1:14 PM


Beercules writes:
No, it doesn't imply a finite universe. We really need a sticky FAQ on mainstream cosmology here.
Correct. In fact, infinite universe big bang models are probably the simplest models to get started with trying to understand the model.
The best FAQ reference, in my opinion, is Ned Wright's cosmology tutorial. Ned is a professor of astronomy at UCLA, and also very helpful on giving accessible information to interested amateurs willing to go into a little bit of depth. Highly recommended. He also has a useful FAQ.
Here is an extract on questions about expansion from a point:
How can the Universe be infinite if it was all concentrated into a point at the Big Bang?
The Universe was not concentrated into a point at the time of the Big Bang. But the observable Universe was concentrated into a point. The distinction between the whole Universe and the part of it that we can see is important. In the figure below ...
Follow the link for the diagram and more details.
Cheers -- Sylas
[This message has been edited by Sylas, 04-04-2004]

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AbelKane
Inactive Junior Member


Message 22 of 26 (97850)
04-05-2004 11:44 AM
Reply to: Message 8 by coffee_addict
04-02-2004 3:30 AM


Thanks for your summary of the big bang and string theory, they are pretty much how i understand things too. As for the other 6 dimensions string theory implies, i think the common beleif is that they are "rolled" up at or bellow the plank length which is why we have never encountered any obsersable effects caused by them, however i feel that it is also possible that at least one or some of them may be much larger than that, even larger than what we percieve as the universe. Perhaps they even have something to do with the 'multivers', perhaps our universe is linked somehow with other universes? im probably talking crap... id love to hear anyone elses views on this.

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AbelKane
Inactive Junior Member


Message 23 of 26 (97852)
04-05-2004 11:47 AM
Reply to: Message 8 by coffee_addict
04-02-2004 3:30 AM


i cant delete this post
[This message has been edited by AbelKane, 04-05-2004]

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1.61803
Member (Idle past 1530 days)
Posts: 2928
From: Lone Star State USA
Joined: 02-19-2004


Message 24 of 26 (98001)
04-05-2004 11:53 PM
Reply to: Message 10 by RAZD
04-02-2004 9:37 AM


Re: inflation
You call that concise? Whew** I guess its realtive pun intended.

This message is a reply to:
 Message 10 by RAZD, posted 04-02-2004 9:37 AM RAZD has replied

Replies to this message:
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usncahill
Inactive Member


Message 25 of 26 (98014)
04-06-2004 12:49 AM
Reply to: Message 18 by Beercules
04-04-2004 4:31 PM


universe/space...same thing? or is space expanding into the universe? and what is the universe then?

This message is a reply to:
 Message 18 by Beercules, posted 04-04-2004 4:31 PM Beercules has not replied

  
RAZD
Member (Idle past 1432 days)
Posts: 20714
From: the other end of the sidewalk
Joined: 03-14-2004


Message 26 of 26 (98057)
04-06-2004 8:58 AM
Reply to: Message 24 by 1.61803
04-05-2004 11:53 PM


Re: inflation
ahahahahaaa
well it is shorter than a book by Hawkings ....

we are limited in our ability to understand
by our ability to understand
RebelAAmerican.Zen[Deist
{{{Buddha walks off laughing with joy}}}

This message is a reply to:
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