From: henry@spsystems.net   
      
   In article <64c0d119.0402131731.41e49fcc@posting.google.com>,   
   Explorer8939  wrote:   
   >Is it possible to be in Mars orbit and collide with Olympus Mons?   
      
   No, alas.  (Not that anyone would want to collide with it, but an orbit   
   passing low over it would be quite the tourist ride...)  Aerobraking and   
   reentry altitudes on Mars are actually similar to those on Earth -- the   
   atmosphere is much thinner, but the weaker gravitational field means   
   density drops off rather less rapidly with altitude.  And Olympus Mons is   
   high, but it's not *that* high...   
   --   
   MOST launched 30 June; science observations running     |   Henry Spencer   
   since Oct; first surprises seen; papers pending.        | henry@spsystems.net   
      
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