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AnonymFeb 17, 2013

what is a light year?

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    Feb 17, 2013

    A light year is the distance that light travels. It is mainly used to measure distances to stars. This distance is traveled by light in vacuum. 1 light-year = 9460730472580800 meters

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    Feb 17, 2013

    1light year = 9.4605284 × 10 to the power of 12 kilometers.

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