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What is the Difference Between a Comet and a Meteor?
What Are Comet Tails? - Universe Today
The World of Comets by Emily Esarey
Comets: An Omen of Disaster? - A Learning Family
Where do comets come from? - CometWatch
Comet NEOWISE’s tails
What are Comets and how are they formed?
We've Just Discovered Comet 67P Has Its Own Little 'Churymoon', And It
Understanding comets, and how some travel at stunningly fast speeds