Recite Blikkenslager foran one light year in earth years kamp forklædt Altid
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What is a light-year and how is it used??
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What Is a Light-year? | HowStuffWorks
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What is a light-year? – Exoplanet Exploration: Planets Beyond our Solar System
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What Is a Light-Year? | NASA Space Place – NASA Science for Kids
Answer: about 2.5284 × 10 miles
What is a light-year? | prior probability
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