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What is a light-year?
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Astronomical Units & Light Years: Definition & Examples - Video & Lesson Transcript | Study.com
What is a light-year and how is it used??
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How far is a light-year? Plus, distances in space
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How big is Solar System in terms of light-years? - Quora
One light year is defined as the distance travelled by light in one year. The speed of light is 3 × 10^8 m/s. The same in metre is?
