Are the distant stars time dilated in proportion to red-shift?  

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mowe
 mowe
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Posts: 10
10/05/2017 8:53 pm  

If you could see a clock on a very distant star; would it be ticking slowly, in proportion with its redshift? 


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reyadbd
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10/05/2017 8:55 pm  

Yes, it would. The light bends of things like supernovae are believed to carry on like this.


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wadihuna
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10/05/2017 8:57 pm  

I assume that means for very distant galaxies if they could be seen, time would hardly be moving.
What about galaxies which are moving away at c?


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vitenax
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10/05/2017 8:59 pm  

In fact, galaxies can recede faster than c in a universe that isn't even expanding, or even in the absence of any gravity at all. If you are in a reference frame that distant galaxies have a velocity close to c, and you undergo a sudden extreme acceleration, then galaxies that were moving in the same direction that you accelerated will recede in distance from you, and they will do it as fast as you can accelerate, and if they are already very far away, they can have their distance from you increase at rates arbitrarily higher than c.


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bowopubo
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10/05/2017 9:00 pm  

If the universe is a curved space, could you still apply SR? I thought that SR assumed flat space-time.


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