If space is expanding (moving) then does relativity change?

AI Thread Summary
The discussion centers on the relationship between space expansion and relativity, questioning whether relativity applies to the movement of space itself. Participants clarify that while distances between objects may increase due to cosmic expansion, this does not imply that space is moving in a conventional sense. They emphasize that this phenomenon does not align with the principles of special relativity, as it does not involve regular motion or time effects. The conversation suggests redirecting the inquiry to more appropriate forums, such as Relativity or Cosmology, for a more focused discussion. Overall, the topic remains unresolved until it is placed in the correct context for further exploration.
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Or maybe we can apply relativity to space itself? (I'm just saying that because it's moving although it sounds like it makes no sense)
 
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Sorry for saying this but can someone actually help me out on this question?
 
You are posting in the wrong forum. That kind of question goes either in the Relativity forum or in the Cosmology forum. Maybe one of the staff will help get it in the right place, and the people there will answer and discuss with you.
(For starters: Just because distances between things increase according to an expansion pattern does not mean that space is moving. It doesn't even mean that the things themselves are moving in the ordinary sense so that special relativity time effects would apply. Approximately uniform distance expansion is not regular motion because it doesn't get you closer to anything. It doesn't fit the special rel picture. No motion effects on time. Try reading the beginning parts of the balloon model sticky thread in Cosmology. Might help.)

No more about this until your thread gets in the right forum. Doesn't belong here.
 
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Relativity change? What does that mean? Could you expand on your question?
 
Sounds like an ATM topic to me.
 

Thread 'Matter density right after the decoupling'

https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
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Thread 'Hubble Constant, Dark Energy and the Expanding Universe'

Why was the Hubble constant assumed to be decreasing and slowing down (decelerating) the expansion rate of the Universe, while at the same time Dark Energy is presumably accelerating the expansion? And to thicken the plot. recent news from NASA indicates that the Hubble constant is now increasing. Can you clarify this enigma? Also., if the Hubble constant eventually decreases, why is there a lower limit to its value?
View full post »

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