How many earth years are in 1 light year?

An earth year is a unit of time.
A light year is a measure of distance.
A light year is the distance light will travel in a vacuum over the period of one (earth) year.
Since light travels at about ##186,300## miles per second, with ##86,400## seconds per day and about ##365## days per year, that works out at about:
##186300xx86400xx365 ~~ 5,875,000,000,000## miles.

 

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