xkcd

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submitted 9 months ago by randomaccount43543 to c/xkcd

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When Pope Gregory XIII briefly shortened the light-year in 1582, it led to navigational chaos and the loss of several Papal starships.

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[–] psud 3 points 9 months ago

I would think that the best time period to use for a light year is whatever year definition has been used to date

Now let's work on the best second to use for the light second