Re: Planets and Resources
			 
             
			
		
		
		
		Realistically, a pretty large number.  A hollowed out asteroid of decent size (20+ km radius?  The solar system has thousands in this size bracket, I believe) could readily hold a population of some millions and employ them all usefully.  It'd be pretty vulnerable compared to a planet, though. 
		
	
		
		
		
		
		
		
			
		
		
		
		
		
		
	
		
		
	
	
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