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  • 24-07-2014
  • Physics
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what are light years actually? answer in brief

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AL2006
AL2006 AL2006
  • 25-07-2014
A light year is a distance. 
It's the distance that light travels in a year, through vacuum.
The distance is about 5.875 trillion miles. 
The nearest star outside our solar system is about 4.2 light years from us.

Sorry to have rambled on for so long.
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