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From: "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com>
Newsgroups: sci.physics.relativity
Subject: Re: Galaxies don't fly apart because their entire frame is rotating
Date: Fri, 12 Apr 2024 13:50:16 -0700
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On 4/11/2024 10:45 PM, Thomas Heger wrote:

[...]

> To measure the position of a star in one billion light years distance 
> you need to wait a billion years, before you can actually see the light 
> emitted from that star.
> 
> Because that is impossible, we simply don't know to were those stars 
> went in the meantime.

Think of taking a look at a star A that is say, 100 light years from 
Earth. Now, look at some other stars around it and try to create a 
little map. Okay, now jump to the star A right now. Well, that star is 
most likely to be in a radically different place, or even dead via 
supernova we have had a chance to detect yet. The map is going to be 
meaningless.

[...]