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Old 17th May 2017, 16:11   #1 (permalink)
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The Multiverse

A couple of years ago there was a fascinating BBC Horizon documentary entitled "Which Universe are we in?"

I started an interest in astronomy when I saw a series by Prof Carl Sagan called Cosmos (and read the book) so I was pleased to see my favourite cosmologist Laura Mersini-Houghton proposing her multiverse theory in the Horizon episode.

For some reason it's surfaced again in the press today but with some of the usual shallow reportage..........

Weird ?cold spot? in space could be first sign of a parallel universe | Metro News

It's hard enough comprehending how big this universe is without having to consider infinite other versions
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Old 17th May 2017, 16:29   #2 (permalink)
 
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ETOPS,
I remember that Horizon, and watching 'Cosmos' on nights in the tower at EGCC, a splendid programme by someone who left us far too soon.

I remember reading about the 'Multiverse' thing in a book by Stephen Hawking about 4 years ago. At the time, it was postulated that there may be as many as 10 to the power of 500 'Universes'.
A younger ex-work colleague informs me there may be evidence that our own Universe is rotating.
This of course throws up other questions such as:-

Where is the axis of rotation?
What is the speed of rotation, and has it been constant over time?
Are all the other Universes rotating, and if so, are their axes aligned in the same direction as ours?

And if there are !0 to the power of 500 'Universes, that's ten, followed by 500 zeros........And each one is as big as ours.........They will take up a heck of a lot of space............But where is this space?.......And what is it's boundary?........and what is beyond that boundary?

Last edited by ZOOKER; 17th May 2017 at 17:28.
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Old 17th May 2017, 19:17   #3 (permalink)
 
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BBC website talked about expansion into a vacuum. Don't think that's right, its expansion into nothing in as much as you don't need anything there beforehand to give elbow room. The boundary is the surface within which the equations apply and beyond which there is no need for equations (as there is nothing to be parameterized). However, what does the man in the Clapham Omnibus think, or is he too concerned with everyday reality and the spectre of mortality?
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Old 17th May 2017, 19:56   #4 (permalink)
 
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Some might say that PPRuNe is a parallel Universe.
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Old 17th May 2017, 20:07   #5 (permalink)
 
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Wonder if there are any lifeforms
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Old 17th May 2017, 20:18   #6 (permalink)
 
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Wonder if there are any lifeforms
Not as we know it Jim.
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Old 17th May 2017, 20:33   #7 (permalink)
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I have a superb proof of this thesis to world-wide acclaim.... just not in this universe...
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Old 17th May 2017, 23:05   #8 (permalink)
 
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Some might say that PPRuNe is a parallel Universe.
Yes, you'll find it on the "brexit" thread.............
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Old 18th May 2017, 06:32   #9 (permalink)
 
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Trouble is the one nearest to us only shares two of our three dimensions their up is our sideways ergo riding a bike is a buggah and that's why their flying saucers are always crashing.

Last edited by tony draper; 18th May 2017 at 07:36.
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Old 18th May 2017, 07:26   #10 (permalink)
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Think a copy of the message from one of you doppelgängers slipped across the interdimensional barrier there Mr D......
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Old 18th May 2017, 11:57   #11 (permalink)
 
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I've found you can best deal with it one universe at a time.
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Old 18th May 2017, 12:22   #12 (permalink)
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I've found you can best deal with it one universe at a time.
Yes.






...but what time?
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Old 18th May 2017, 14:49   #13 (permalink)
 
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If the universe is, by definition, everything then what else is there?

And is the else taxable?

If so, how much will my tax avoidance accountants charge me for that extraneous stuff? The stuff that goes beyond everything in my pocket and bank accounts.
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Old 18th May 2017, 17:01   #14 (permalink)
 
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..... my favourite cosmologist Laura Mersini-Houghton ....
Not a phrase you see much but I can see why

Last edited by Islandlad; 18th May 2017 at 17:13.
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Old 18th May 2017, 19:10   #15 (permalink)
 
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Fotini Markopoulou on multi universes and time
https://www.youtube.com/watch?v=1-Q4m5T7knM
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Old 19th May 2017, 17:31   #16 (permalink)
 
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Markopoulou on multi universes and time
Same chap that also 'discovered' China?
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