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Meteoroid

 

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      small chunks of rock or iron that travel through space

 


Sentences:
When a meteoroid heats up in Earth’s atmosphere, it makes a bright trail. Then it is called a meteor.

That meteoroid used to be a part of a comet.


 

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Asteroid Ida and its moon
If a piece of this asteroid or its moon breaks off, it could become a meteoroid.
Image Credit: 
NASA
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Page Last Updated: July 17th, 2014
Page Editor: NASA Education