How is time defined?

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Christian Foy

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How is time defined?
« on: 20/04/2011 09:30:02 »
Christian Foy  asked the Naked Scientists:
It doesn't matter what "time" is.  What we call time is a measurement of the motion of something through a set distance.  Earth around the sun is a year.  We measure other motions (atomic. Molecular, human scale, etc) against that set motion. Time is a comparison of at least one motion through distance against another.  The measurement of a distance traveled compared to another is all there is to time.   

What do you think?
« Last Edit: 20/04/2011 09:30:02 by _system »