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What is a light-year?
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What Is a Light-Year? | NASA Space Place – NASA Science for Kids
What Is a Light-Year? | NASA Space Place – NASA Science for Kids
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
What Is a Light-Year? | NASA Space Place – NASA Science for Kids
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What Is a Light-Year? | NASA Space Place – NASA Science for Kids
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