From: lordyumyum@gmail.com   
      
   As far as Face on Mars goes the calculations are this way.   
   Take mars time and get how many hours till 12 noon.   
   Say it's 4 hours   
   Now same for Earth   
   Say it's 18   
   Then what you have is at Mars noon in 4 hours is Earth at   
   14 hours till noon.   
   360 / 24 is 15 degrees per hour   
   So 15*14 is 210 degrees mars will travel until Earth noon.   
   You take the 210 and superimpose it on Mars and that is facing earth at the   
   next Earth noon.   
   There's more to do after that to line up the Face on Mars but that's the way   
   to start.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)