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w/e

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Question
Answer
a large cloud of gas and dust in interstellar space; a region in space where stars are born   nebula  
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a rotating cloud of gas and dust from which the sun and planets formed   solar nebula  
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the process by which nuclei of small atoms combine to form a new, more massive nucleus; the process releases energy   nuclear fusion  
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a dark area of the photosphere of the sun that is cooler than the surrounding areas and that has a strong magnetic field   sunspot  
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the spin of a body on its axis   rotation  
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the path that a body follows as it travels around another body in space   orbit  
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the motion of a body that travels around another body in space; one complete trip along an orbit   revolution  
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