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What is that?--LIGHT YEAR-a measure of distance--not a measure of time – Matthew Cross Writes
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What is a light year? Find out. | Space | EarthSky
What is a light-year?
Why is a light-year a more useful measurement in astronomy than a meter is? | Study.com
What is a light-year and how is it used??
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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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How to Measure Things That Are Astronomically Far Away | WIRED
