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9 April, 20:48

A light-year is a unit of

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  1. 9 April, 20:55
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    A unit of length used to express astronomical distances.
  2. 9 April, 23:43
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    A light-year is a unit of length or distance.

    It's defined as the distance that light (or any electromagnetic

    wave) travels through vacuum in one Earth-year.

    ==> about 9,460,730,000,000,000 meters

    ==> about 5,878,620,000,000 miles
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