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  1. Coma (comet) - Wikipedia

  2. Comets: Facts - Science@NASA

  3. Comets: Everything you need to know | Space

  4. Comet - Wikipedia

  5. Coma | comet | Britannica

  6. Comet | Definition, Composition, & Facts | Britannica

  7. Why Comets Are Important - NASA Solar System Exploration

  8. Parts of a Comet - Science Notes and Projects

  9. What Is a Comet? | NASA Space Place – NASA Science for Kids

  10. ESA Science & Technology - Catching up with the comet's coma