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20 July, 22:25

How much miles is a light year

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  1. 21 July, 00:51
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    1 light-year = roughly 5,874,601,700,000 miles. (rounded)

    To work it out, take the speed of light, and change units a few times:

    (186,282.397 miles/second)

    times

    (86,400 second/day)

    times

    (365 day/year)

    = (186,282.397 x 86,400 x 365) mile/year.

    You can whip that out on your calculator in no time.
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