> But relativity says that it could have been the Earth to orbit
> very quickly around my spaceship, or my spaceship around it..
> as all is relative and NO ETHER (fixed space coordinates) EXISTS!
>
> To me this sounds very contradictory!

1. Some guy you know more or less cleared that up in something he
wrote about 96 years ago.

2. But a key relevant difference is that you were subject to
acceleration forces to achieve the velocity difference and the world
wasn't.

3. Also, fwiw, you will need to travel in a non orbital path to
achieve useful relativistic speeds,

4. and if you did find an object that you  could orbit at usefully
relativistic speeds you would be being subject to continual
acceleration which may be relevant to outcomes.

>  nor asks me to have faith in something?

5. **Everything** requires faith in something.


          Russell
--=20
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