• The Deep Impact Mission
  
• The Rosetta rendezvous with Comet 67P/Churyumov-Gerasimenko 
  
• The JPL Solar System Observation   
  
• Observable Comets
• The JPL Ephemeris Generator
• Cometography
• The Comet Section of Germany
• The International Comet Quarterly Information Website
• An introduction to the comet physics by David Jewitt
• The NASA Astrobiology Institute
  
                  
  

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