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Squishymushshroom t1_j1jjjyg wrote

In special relativity no one ever experience any time dilation. Every observer experiences it‘s Eigenzeit.

Time also does not move slower for anyone, as this statement is absolute and hence violates the principle that every observer is equally correct.

What is correct to say is something like; From the perspective of a person on earth , it appears that time in the space station moving fast has slowed down.

But a person on ISS will tell you the same thing about earth!

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mutandis57 t1_j1jx87a wrote

> But a person on ISS will tell you the same thing about earth!

You can only say that about spaceships flying past Earth in a straight line. The ISS goes in circles, i.e. always changes directions. Only the Earth reference frame is "inertial". As Duros001 said above, this creates not just a perceptual but an actual measurable difference between the clocks on Earth and ISS - the clock on ISS will tick slower and all observers will agree on that.

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