nucleus   earth   sun  
       
  atom (based on Niels Bohr's model)   Global Positioning System satellites part of the solar system ('southern' view)  
         
  dense gaseous mixture       galaxy M31 (Andromeda nebula)  
  Hergé rocket   a GPS satellite   lunar eclipse  
  Artificial satellites in orbit (27-11-2004) Saturn  
     

gas and dust inside M16 (Eagle Nebula) (Hubble space telescope) 		     
 

 

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