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Frant
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PostPosted: Fri, 21st May 2010 13:08    Post subject:
Atropa wrote:
Ragedoctor wrote:
Things as simple as gravity, are they not faster than light speed? I mean the gravity of something, for example the universes core is affecting our speed right? But not enough and therefore we expand and dark energy speeds it up. Isnt that gravity faster that light, I mean its always pulling and if it was slower that light speed the matter from the Big Bang would have escaped its grasp and we would have been scattered long ago.


If gravity was faster than light we would be able to "see" the gravity from beyond the event horizon. This would make the universe seem heavier than it is, and not lighter. Furthermore there is no such thing as the core of the universe.


Gravity is just as fast as light (gravitational waves move outwards in the speed of light), so it does seem like there's a hard limit at the speed of light.


Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn!
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Atropa




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PostPosted: Fri, 21st May 2010 13:15    Post subject:
Have they found those gravity waves yet? I know that is what people believe right now but has it been established experimentally?
And the light as limit is only for information. The universe have expanded far faster than the speed of light. Confinement is another weird over light speed phenomenon.
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Frant
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PostPosted: Fri, 21st May 2010 13:23    Post subject:
Only indirectly. LIGO, the current top sensitive gravitational wave detector isn't very "sensitive" in reality. New detectors are being built and planned with higher sensitivities that makes LIGO look like a cheap spyglass in comparison.


Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn!
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Atropa




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PostPosted: Fri, 21st May 2010 13:32    Post subject:
lol it will be one heck of a challenge to measure the uncertainty on that bastard Laughing
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Frant
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Posts: 24973
Location: Your Mom
PostPosted: Fri, 21st May 2010 13:40    Post subject:
Atropa wrote:
lol it will be one heck of a challenge to measure the uncertainty on that bastard Laughing


Well, I wonder how they manage to filter out when an elephant in Africa farts.. I mean..

Quote:
gravitational waves that originate tens of millions of light years from Earth are expected to distort the 4 kilometer mirror spacing by about 10−18 m, less than one-thousandth the "diameter" of a proton.


-18 should be raised to 10. Next generation detectors would be able to measure the fart of a mosquito. Imagine all the noise they have to filter out.


Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn!
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Lord_IpwnU
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PostPosted: Sun, 23rd May 2010 20:53    Post subject:
Beautiful. BEAUTIFUL I SAY.

http://www.wikisky.org/
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