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Astronomical Units & Light Years: Definition & Examples - Video & Lesson Transcript | Study.com
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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
How to Calculate a Light Year: 10 Steps (with Pictures) - wikiHow
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What is a light-year?
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Speed of light - Wikipedia
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