Light-year - Wikipedia
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What Is a Light-Year? | NASA Space Place – NASA Science for Kids
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SOLVED:Astronomy One light-year is defined by astronomers to be the distance that a beam of light will travel in 1 year (365 days). If the speed of light is 186,000 miles per
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What Is a Light-Year? | NASA Space Place – NASA Science for Kids
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How Long Does It Take To Travel 1 Light Year | Science Of Space - YouTube
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