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What Is a Light-Year? | NASA Space Place – NASA Science for Kids
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Definition of light year; outer space. | Definition of light, Plurals, Words
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A few definitions Light year (ly): Distance light travels in one years (about 10 trillion km) Andromeda Galaxy – 2.4 million light years away. - ppt video online download
Light-year - Wikipedia
What Is a Light Year? Definition and Examples
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What is a light-year?
What is Light Year?//Easily Explained in Urdu/Hindu//Understand it Forever//H Studiers - YouTube
