Oort cloud
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  Subject Replies Date
What is outside of the oort cloud???? 0 10/13/2015
Has anyone ever proposed a theory that the cyclical rain of comets the Earth seems to have suffered every 26-30 million years is caused by a specific ... 0 12/21/2013
Does oort cloud begin near pluto's orbit 1 8/24/2013
 
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