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

W dniu 09.04.2024 o 08:47, Thomas Heger pisze:

Am 05.04.2024 um 10:20 schrieb Mikko:
 

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).

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Why would you want to explain someting that is never seen?

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Theoretical physics does not require visibility.

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Study of phantasies is not physics of any kind.
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Interesting are phenomenons which exist, whether they are visible or not.

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They are interesting only if they are observed to exist or there is
a good reason to expect that they can be observed.
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E.g. a ship on the other side of the planet cannot be seen from here
or the other side of the Moon.

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Both can be seen.
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But both do exist.
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Visibility, usefulness or other categories of this kind, which reflect
a connection to the observer, are irrelevant in physics.

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Everything in physics has a connection to an observer.
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 This is a totally idiotic requirement.
 Many things cannot be seen, even if they are real.

The ability of seeing is not the most important
ability of an observer. From the point of view
of physics - the most important ability of an
observer is his ability of creating, maintaining
and modifying physics,  of course.
So, yes, everything in physics has a connection
to an observer.