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what is a light year?
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Asked 12/17/2015 10:38:51 AM
Updated 12/17/2015 12:28:46 PM
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User: what is a light year?

Question
Asked 12/17/2015 10:38:51 AM
Updated 12/17/2015 12:28:46 PM
2 Answers/Comments
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A light-year is a unit of length used informally to express astronomical distances which is approximately 9 trillion kilometres (or about 6 trillion miles).
Added 12/17/2015 12:17:16 PM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [12/17/2015 12:27:44 PM]
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A light year is a unit of length (not time) equivalent to the distance traveled by light (at 299,792,458 meters per second), in a vacuum, in one Julian year (365.25 days).




Added 12/17/2015 12:28:46 PM
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