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Pre-solar grains

 
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May29-12, 09:29 AM   #1
 

Pre-solar grains


I'm trying to understand (not in huge detail) the formation of the solar system. However my notes start at pre-solar grains, but don't explain how the grains themselves formed. In the gas/dust cloud that collapsed to form the solar system, were the grains there already or did they form during the collapse?
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