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Physics, Astronomy & Cosmology / Re: Frames of Reference and Proper Time

« on: 16/08/2016 13:25:19 »

Thoughts upon Special Relativity.
Take the Frame of Reference of an observer in Spacetime.
The observer's location is permanently (0,0,0,t) in that Frame of Reference.
To that observer Spacetime is at rest, as it is mapped from his location and the rest of spacetime moves relative to him.
Now, if that observer were to be holding a perfect clock, then that clock would, in effect, measure (provide, form) the time axis.
Therefore, would it not be the case that the time coordinates in that frame constitute Proper Time, being time measured on a clock at rest, that is accompanying the worldline of that observer?

To summarize: is the time measured by an observer, 'locally' in their own Frame of Reference, an instance of Proper Time?
(while time in any other Frame of Reference, relative to them, will be coordinate time?)

That is correct.

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Physics, Astronomy & Cosmology / Re: Frames of Reference and Proper Time

« on: 16/08/2016 13:00:59 »

You are giving, roughly, the definition of proper time. As long as that "observer" only has inertial motion, then this is OK for Special Relativity.