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The speed of light is 299792458 m/s.

Per year that is 299792458 * 3600 * 24 * 365.242199 = 9.460528411*1015 meters.

Divided by 1000 that's 9.460528411*1012 kilometers.

To change this to miles you divide it by 1.609344.

9.460528411*1012 / 1.609344 = 5.878499818*1012 miles.

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13y ago

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