@keyframes earth-rotate {
    
    0%{
      object-position: -0em 0px; 
    }
    
    9%{
      object-position: -2em 0px; 
    }
    
    18%{
      object-position: -4em 0px; 
    }
    
    27%{
      object-position: -6em 0px; 
    }
    
    36%{
      object-position: -8em 0px; 
    }
    
    45%{
      object-position: -10em 0px; 
    }
    
    54%{
      object-position: -12em 0px; 
    }
    
    63%{
      object-position: -14em 0px; 
    }
    
    72%{
      object-position: -16em 0px; 
    }
    
    81%{
      object-position: -18em 0px; 
    }
    
    90%{
      object-position: -20em 0px; 
    }
    
    }