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Old 20th May 2013, 06:16 AM   #21
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Signal will not bounce back to the Earth as reflected signals follow a R^4 law. Outgoing signals follow a R^2 law, so Megawatt ERP signals like TV carrier signals, can be detected at 10s of LY.

Modern telecommunications signals are much more efficient and as they get more efficient, look more and more like white noise
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Old 21st May 2013, 09:04 AM   #22
M Gregg is offline M Gregg  United Kingdom
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The center of the universe,

The last section on a flat universe is interesting..
ie what is a flat universe>>>infinate

History of the Center of the Universe - Wikipedia, the free encyclopedia

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What is the sound of one hand clapping?
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Old 21st May 2013, 04:48 PM   #23
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We are going to be contacted by an alien race soon and the first decoded message from received (probably at Arecibo) will be "Uh, Breaker one-nine...".

After meaningful communication has been established with this alien race they will promptly try to get us to change our long distance service by offering substantial savings over our current carrier!
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Old 21st May 2013, 04:53 PM   #24
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Oh yeah, and when they visit in person watch out because they will immediately try to get us to play an interstellar version of three card monty!
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Old 21st May 2013, 07:49 PM   #25
M Gregg is offline M Gregg  United Kingdom
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The Russian doll....

Just for fun..
Just a thought..Looking at the 3 or 4 dimensional universe...if its finite then the Russian doll comes to mind..whats outside that...assuming that was true .... if everything is energy then is the amount of energy infinite taking into account the Russian doll ?

Time can be infinite it has a past..present..future (assuming no other variable exists)(String theory other dimensions)
Then the question, is energy just an effect of something else that is /can be infinite?
Entanglement comes to mind...

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What is the sound of one hand clapping?

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Old 22nd May 2013, 12:09 AM   #26
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Time is as long as we make it, for us. It's direction is an interesting question. Watching the aerial squabbling of goldfinches in my garden, I think their time must go faster.

The future isn't part of time until it gets there. Extension, or space, is similarly relative. Neither is infinite unless we compare it with the infinitessimally short.

If we took the whole universe as our unit of measurement, then it would be constant and we would be getting smaller but time would be the same.

It's worth remembering that actually we measure everything relative to ourselves, from our point of view. Copernicus' maths was right but his conclusion was wrong. We are at the centre of the universe, for us.

I've been grappling with the idea that the development of language is one and the same thing as the development of knowledge. There's no point in departing from the mainstream unless you have it in your grasp, because the consensus reflected in language is what knowledge is. Outside is babble. Once we know everything, there'll be nothing to talk about.

It seems odd that new knowledge always turns out to be useful. Unlike the boxes of stuff in my attic.
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Old 22nd May 2013, 07:43 AM   #27
M Gregg is offline M Gregg  United Kingdom
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Its interesting,

Quote:
Watching the aerial squabbling of goldfinches in my garden, I think their time must go faster.
Gravity?s effect on time confirmed - physicsworld.com


The older you get the faster time seems to go..and as you say time is dependent on how its perceived..ie there was no time before the big bang..that's assuming its not seen as a super nova type event by someone outside the universe...
Just for interest..
http://www.futuretg.com/FTHumanEvolu...0Mechanics.pdf

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What is the sound of one hand clapping?

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Old 22nd May 2013, 11:12 AM   #28
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To someone "outside" this universe our Big Bang didn't happen in an observable sense. This universe didn't exist before the Big Bang...no space-time or matter so nowhere in space or time for an observer to watch from, no substance for an observer to be built from. Our space-time and all matter in our universe unfolded from the Big Bang singularity and conditions suitable for an observer to participate took a looooong time to develop. Similarly thinking of this universe as either having finite extent with empty space "outside" it or as having infinite extent misses the implications of relativity. It makes more sense to consider space-time and matter as co-dependent than independent. Our space-time is curved back on itself by the matter in our universe, so there isn't an outside that in any sense exists or is reachable for observers in this universe. There may well be other dimensions beside our four of space-time where things are happening and other universes are unfolding, but we aren't there!
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Old 23rd May 2013, 08:41 AM   #29
M Gregg is offline M Gregg  United Kingdom
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Preservation of information,
Black hole information paradox - Wikipedia, the free encyclopedia

Matter=energy
A particle has mass and waves don't..

Quote..
In the formulation of the De Broglie–Bohm theory, there is only a wave function for the entire universe (which always evolves by the Schrödinger equation).
De Broglie?Bohm theory - Wikipedia, the free encyclopedia

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Old 23rd May 2013, 09:59 AM   #30
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