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Re: unit system??



Regarding Skip's question:

For that matter, is a year a metric unit? Does the length of the
light-year
depend on the year chosen?

It would if different years were actually used in its calculation.
But AFAIK the year always used is the Julian year of exactly
365.25 days of exactly 86400 s each. This makes the light year
exactly 9460730472580800 m long by definition (of the meter, day &
Julian year).

David Bowman
David_Bowman@georgetowncollege.edu