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1 light year is equal to how many years of the Earth? - Quora
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Light year: What is a light year and How long is a light year
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What Is A Light Year?
1 light year is equal to how many years of the Earth? - Quora
What is a light-year and how is it used??
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What is a light year, and how many Earth years are equivalent to a light year? - Quora
