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				 Re: Suns - collapse? 
 You get 3 years; I made a scenario out of just such an event.
 After that time, you will be left with no stars in the system (if one star of a binary goes, it takes the other with it), and all planets will be reduced to asteroid fields.
 
 I believe it was said that stars with the unstable description/ability do not have an appreciably greater chance to go nova than otherwise normal stars.
 
 In any case, if you build a ringworld or sphereworld, the star will be stabilized and can not go nova.
 
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