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fiddlesticks

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
        Help!  

Question
Answer
star   a huge,glowing ball of gas in the sky  
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nuclear fusion   when the nuclei of two or more atoms join to form a single, larger nucleus  
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light-year   the distance light travels in one year  
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magniitude   the brightness of a star  
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constellation   a group of stars  
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galaxy   a huge grouping of stars  
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solar system   the sun and the cluster of bodies around it  
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AU (ASTRONOMICAL UNIT)   THE AVERAGE DISTANCE FROM THE SUN  
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Created by: marschall33
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