what is light year?????????????
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light year is a distance that light travells in a year. this is correct answer
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light year is the unit to measure a very far away distance
OR
The light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometres or 5.88 trillion miles
OR
The light-year is a unit of length used to express astronomical distances and measures about 9.46 trillion kilometres or 5.88 trillion miles
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