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Can you explain, what is a light year, in the most simple way? - Quora
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how many seconds are there in one light-year? - Brainly.com
Review for Quiz 1.A light year is a unit of measure for Distance! It is the distance electromagnetic radiation travels in one year. - ppt download
What Is a light-year? | Space
How to Calculate a Light Year: 10 Steps (with Pictures) - wikiHow
What is a light-year? | prior probability
What Is a Light-Year? | NASA Space Place – NASA Science for Kids
TED Ed: Light seconds, light years, light centuries: How to measure extreme distances
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Light-year - Wikipedia
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