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From: "Paul.B.Andersen" <relativity@paulba.no>
Newsgroups: sci.physics.relativity
Subject: Re: What is a photon
Date: Sat, 28 Jun 2025 12:55:08 +0200
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Den 27.06.2025 07:26, skrev Thomas Heger:
> 
> Actually the surface of planet Earth moves, too.
> 
> This movement is also quite fast, but usually ignored.
> 
> We could, however, use this as a principle and ignore the velocity of 
> reference systems in all cases, where we cannot decide, whether 
> something moves or not.
> 
> Therefore all inertial frames of reference do not move by definition, if 
> they rest in respect to the observer, whether they actually move or not.
> 
> This makes everything 'relative' (to the observer), which includes 
> actually matter, too.
> 
> This would include also 'the aether', too, hence aether would be 
> something, which rests in respect to the observer in question, while not 
> in respect to other observers.
> 
> Other observers therefore need their own 'aether' (and also their own 
> matter!).
> 
> This is why it is impossible to measure the speed of the aether, because 
> 'aether' is defined as being at rest in respect to the observer.
> 

Quite, well said!

The 'aether' has to be at rest in respect to all observers,
even when the observers are moving relative each other.

Since this is impossible, the conclusion is inevitable:
It is impossible to measure the speed of the aether, because
the 'aether' doesn't exist
-- 
Paul

https://paulba.no/