Light-year in a Sentence 

Definition of Light-year  

a distance of space used by Astronomers

Examples of Light-year in a sentence

The scientists tried to predict if the star was a light-year away or further.  
A light-year is around 5.9 trillion miles and used to measure how far things are apart in space.  
Penny’s science teacher added the term ‘light-year’ to the board and explained that this astronomical word is linked to space distance.  

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