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Asteroid belt

Asteroid belt

 
Asteroid families
 
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Asteroid belt discussion
 
rnlunatic
04/02/09

Kiyotsugu Hirayama discovered that asteroids clumped together in groups in 1918.
           
 
gwynraven
04/02/09
replied to: rnlunatic
About one third of the asteroids in the main belt are members of a family. Some main families include Flora, Eunoma, and Koronis.