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From: Thomas Heger <ttt_heg@web.de>
Newsgroups: sci.physics.relativity
Subject: Re: Galaxies don't fly apart because their entire frame is rotating
Date: Thu, 11 Apr 2024 10:57:44 +0200
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Am 10.04.2024 um 15:30 schrieb J. J. Lodder:

>>>>
>>>> Also, perhaps our current state of the art technology wrt observing the
>>>> universe from our little earth is damn near pre embryonic wrt the grand
>>>> scheme of things... ;^)
>>>>
>>>
>>> Usual observations from our perspective of the universe would require to
>>> remove the effects of the delay, which is caused by the finite speed of
>>> light.
>>>
>>> But this is not done.
>>
>> Of course it is done!!!
>>
>> You have definitely never read any paper about astronomy, or the history
>> of astronomy. As a matter of fact one of the main issue in astronomy is
>> to determine the distance of objects as precisely as possible.
>>
>> Thomas, why are you constantly making up stuff of that kind? Is it malice
>> or stupidity?
>>
>> Both?
>
> Hanlon's razor applies, I think.
>
> And for amusement: noting different delays of quasar fluctuations,
> in passing through an Einstein lens, is a practical way
> of establishing their cosmological distance,

Sure, the delay is known.

But how would you remove it?

The difference in time is actually HUGE, hence you would need to wait a 
VERY long time, if you want to know the present position of stars seen a 
few billion light years away.

In the meantime cosmologists explain the positions of stars, which do 
not belong to the same time.

TH