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time - How long did it take for the universe to become 1 one light year? - Physics Stack Exchange
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What is a Light Year? - ppt download
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Exit : Why is a light year called a light year? - ppt download
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LogIQids - #LearnWithLQ - What is a Light Year? Popular misconception makes one believe that a light-year is a unit of time. However, it is an astronomical unit of distance. One light-year
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