What is light year ?
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LIGHT YEAR :
a unit of length in astronomy equal to the distance that light travels in one year in a vacuum or about 5.88 trillion miles (9.46 trillion kilometers).
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Answer:
1 light-year = 9460730472580800 metres (exactly)
≈ 9.461 petametres
≈ 9.461 trillion kilometres
≈ 5.878625 trillion miles
≈ 63241.077 astronomical units
≈ 0.306601 parsecs
The speed of light Is 299792458 m/s
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