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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?
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How to Calculate a Light Year: 10 Steps (with Pictures) - wikiHow
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How to Calculate a Light Year: 10 Steps (with Pictures) - wikiHow
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In the new Disney Pixar movie Lightyear, time gets bendy. Is time travel real, or just science fiction?
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Light seconds, light years, light centuries: How to measure extreme distances - Yuan-Sen Ting - YouTube
