From: bernhard@bksys.at   
      
   Hi!   
      
   Is it feasible to make a ship that floats on the atmosphere? A kind of   
   bowl with the bottom at 5-10 km and the top so high that it can be   
   sealed with a thin lid that would only need to stand low pressure at   
   20-30 km. The inside should be empty - vacuum. On this platform there   
   might be a ramp to launch space vehicles and from the bottom there   
   should be a lift down to the ground.   
      
   Bernhard   
      
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