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How Long is a Light Year?
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A light year is the distance that light can travel in one year. 1 light year = 9,460,000,000,000km. a Express one light year in scientific notation. b The average distance between
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/img/iea/bjOLknylwe/what-is-lightyear.jpg "Light year: What is a light year and How long is a light year")
Light year: What is a light year and How long is a light year
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