XPost: sci.space.policy, sci.physics   
   From: alain245@videotron.ca   
      
   On Oct/13/2016 at 10:53 AM, Fred J. McCall wrote :   
   > Serigo  wrote:   
   >   
   >> On 10/12/2016 7:41 PM, Fred J. McCall wrote:   
   >>> Serigo  wrote:   
      
   >>>> it is still too costly, and there is no payoff, just rocks and sand in a   
   >>>> vaccum   
   >>>>   
   >>>   
   >>> We already established that your "rocks and sand in a vacuum" is   
   >>> false.   
   >>>   
   >>   
   >> rong, it is not a true or false game.   
   >>   
   >   
   > Of course it is.  It's either a vacuum or it isn't.   
   >   
   >>   
   >> Compaired to Earths atmosphere, Mars is more like outter space, a vacuum.   
   >>   
   >   
   > Not the definition of 'vacuum'.  By your definition Creed, Colorado,   
   > is a 'vacuum', since the atmospheric pressure there is closer to space   
   > than it is to sea level.   
      
   Of course Mars' atmosphere isn't a vacuum. But atmospheric pressure at   
   Creede, Colorado is closer to 101.3 kPa than to 0. It is about 73kPa.   
   Extremely few long term human settlements have existed high enough to be   
   below half of atmospheric pressure at sea level. Only 6 mountains in   
   North America are high enough to have an average pressure less than half   
   of the average pressure at sea level. They are all in Alaska, Yukon and   
   Mexico. And none are inhabited.   
      
      
   Alain Fournier   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)