> now, I am in a spaceship, I orbit around the Earth at very high
> speed for a certain time, when I'm back home all other people
> (which resided on the Earth) look older than I am. Thus time in
> my spaceship was slowed, or on the Earth it was quickened.
> 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!

You can't do this without (very large) acceleration and deceleration.=20
You can't accelerate the earth and have the same effect, you will notice=20
when *you* accelerate. Hence the two experiments (you accelerate and=20
orbit the earth, or the earth accelerates and orbits you) are not=20
symmetric at all.

--=20

Wouter van Ooijen

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--=20
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