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What is a light-year?
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SOLVED: Astronomers Use light-year to measure distance A light-year is the distance light travels ore year The speed of light is approximately 300,000 km/sec How long is light-year In kilometers? b. The
Light year: What is a light year and How long is a light year
time - How long did it take for the universe to become 1 one light year? - Physics Stack Exchange
How Long is a Light Year?
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