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Author Topic:   Size of the Universe
Hoof Hearted
Junior Member (Idle past 5128 days)
Posts: 24
From: Chorley, Lancs, UK
Joined: 03-20-2007


Message 1 of 4 (419014)
08-31-2007 12:25 PM


I was always under the impression that it was supposed to be impossible for matter to travel faster than the speed of light. We are led to believe that the universe is 13.7 billion years old. So therefore on this basis, the radius of the universe must <= 13.7 billion light years.
I was suprised today when I found this web page:
Our expanding universe: Age, history & other facts | Space
It claims that the diameter of the universe has been calculated at 156 billion light years. If this is true, this means that matter emitting from the big bang must have exceeded the speed of light significantly in order to reach this distance in just 13.7 billion years.
Obviously my logic is flawed. Can someone explain please?
Ian

Replies to this message:
 Message 2 by AdminNosy, posted 08-31-2007 12:39 PM Hoof Hearted has replied

AdminNosy
Administrator
Posts: 4754
From: Vancouver, BC, Canada
Joined: 11-11-2003


Message 2 of 4 (419019)
08-31-2007 12:39 PM
Reply to: Message 1 by Hoof Hearted
08-31-2007 12:25 PM


In another thread
Hi HH, welcome to EvC.
Your question is a good one and has been discussed here before.
Your logic is impeccable, it is your facts that are a bit pecced.
I did a search and found one place where it is being discussed:
Message 10.
Look around there.
If you still want to discuss it you can ask questions there or, if needed, we could promote this topic.

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This message is a reply to:
 Message 1 by Hoof Hearted, posted 08-31-2007 12:25 PM Hoof Hearted has replied

Replies to this message:
 Message 3 by Hoof Hearted, posted 08-31-2007 1:25 PM AdminNosy has replied

Hoof Hearted
Junior Member (Idle past 5128 days)
Posts: 24
From: Chorley, Lancs, UK
Joined: 03-20-2007


Message 3 of 4 (419029)
08-31-2007 1:25 PM
Reply to: Message 2 by AdminNosy
08-31-2007 12:39 PM


Re: In another thread
Thanks for that. I hadn't realised that space could expand also. I thought that space is supposed to be empty. So it's dificult to envisage 'nothing' expanding. I'll do some digging around on this subject rather than creating a new post on something that's been discussed previously.
Thanks again.
Ian

This message is a reply to:
 Message 2 by AdminNosy, posted 08-31-2007 12:39 PM AdminNosy has replied

Replies to this message:
 Message 4 by AdminNosy, posted 08-31-2007 5:37 PM Hoof Hearted has not replied

AdminNosy
Administrator
Posts: 4754
From: Vancouver, BC, Canada
Joined: 11-11-2003


Message 4 of 4 (419074)
08-31-2007 5:37 PM
Reply to: Message 3 by Hoof Hearted
08-31-2007 1:25 PM


It get's more mind warping.
Good luck HH.
We have a couple of resident real physicists. Cavediver and Son Goku by name. If you dig up there posts you will have your poor brain twisted even worse.
It seems that spacetime isn't a nothing. In fact, it is the nothing that is everything. I find that at some point I just have to accept what is being said without being able to check it out or really grasp what is going on. I do have enough understanding to know that there is some pretty strong reasons why it is necessary to give credence to this stuff.
The universe around us is, for sure, NOT as we perceive it!

This message is a reply to:
 Message 3 by Hoof Hearted, posted 08-31-2007 1:25 PM Hoof Hearted has not replied

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