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Credit & Copyright: Pavel Smilyk  
   
Explanation:
Currently, comet PANSTARRS is passing nearly in front of the galaxy Andromeda.  
  
Coincidentally, both   
comet and galaxy appear now to be just about the same   
angular size.  
  
In physical size, even though   
Comet PANSTARRS is currently the largest object in the   
Solar System with a tail spanning about 15 times the diameter of   
the Sun, it is still about 70 billion times   
smaller than the   
Andromeda galaxy (M31).  
  
The above image was taken a few days ago near   
Syktyvkar,   
Russia.  
  
As C/2011 L4 (PANSTARRS) on the lower left  
recedes from the Sun and dims, it is   
returning to the northerly direction   
whence it came.    
  
When   
the comet   
will return is currently unknown, although   
humans may have merged with computers by then.  
  
    
 Gallery:   
Comet PANSTARRS 
   
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Based on Astronomy Picture
Of the Day
  