# Thread: What is " time " really ?

1. Your orbital velocity (speed) indeed has nothing to do with the radius. Don't know why you want to address that?

Yes the radius is always the same i.e. 5000km but we were talking about distance (movement) The total we travelled through space/time is 15000km

2. Originally Posted by Mrjixies
Your orbital velocity (speed) indeed has nothing to do with the radius. Don't know why you want to address that?
Because it's the orbital speed that causes the dilation.
And that has nothing whatsoever to do with the radius.

Yes the radius is always the same i.e. 5000km but we were talking about distance (movement) The total we travelled through space/time is 15000km
And that is completely and utterly irrelevant as far as time dilation is concerned.
As previously stated it's the orbital SPEED.
Not the distance, nor the distance travelled.
It is, and get someone to read this out loud to you: the SPEED - how much distance is covered per unit time.
And, as also previously noted, that speed can be achieved while maintaing a constant distance from the observer.

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