Re: Galaxies don't fly apart because their entire frame is rotating

Am 30.03.2024 um 18:50 schrieb Python:

Le 30/03/2024 à 08:41, Thomas Heger a écrit :
...

Now cosmologists have a wellknown habit to ignore the delay caused by
the finite speed of light, hence tend to take the observed image for
real and make no attempts to compensate the delay.

>
"wellknown"? Quite the opposite. This is something you made up (as
usual).
>
Haven't you noticed the number of papers proposing explanations for
the observation of big galaxies *older* than it was supposedly possible?
They are visible in images obtained *now* by spatial telescopes.
>

This is actually, what I had criticised in Einstein's 'On the
electrodynamics of moving bodies' several times, too, because Einstein
didn't even mention the delay and made not effort to eliminate its
effects.

>
This is wrong. He did actually that in part I.1 in 1905 article as
it as been *shown* to you in details numerous times (it is basically
obvious for any competent reader of the paper, only you failed to
understand that).
>

In cosmology the problem is much more obvious, but cosmologists make
not attempts to compensate this effect, neither.

>
This is also wrong.
>
What the hell made you think such an idiotic thing? Cosmologists not
taking in account the finite light propagation speed? Seriously, you
have a cognitive problem of some kind.
>

Instead they are looking for the cause of rotation of the vortex
structure (what is rather silly).

>
They noticed that the rotational speed of stars in most galaxies
cannot be explained by gravitation if you only take into account
the mass of the visible part of them. There is nothing silly in
trying to sort that out.
>
>

I try to explain rotating galaxy vortices by foreground rotation of the frame of reference of the observer.
In this case a vortex is actually a structure of significant depth, where stars are stacked in distance, hence also 'stacked in time' (in the image).
This would cause an apparent rotation of the vortex, while actually the foreground rotates, because a rotating observer would see remote stars at a different position than not so remote stars (still far away).
Since depth in space is difficult to measure, it is an understandable error to ascribe the same depth to stars in a vortex formation, even if the central stars are much further away.
If now a structure with very large depth is 'flattened' to the image of such a structure, the question would arise, why that structure does not fly apart, if it rotates that fast.
The answer would be: because the observer rotates and not the vortex.
TH