Small solar system objects

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Across
  1. 3. leaves craters
  2. 7. beyond the kuiper belt?
  3. 8. solid inner core of a comet?
  4. 10. is not one asteroid but many asteroids?
  5. 11. are not considered a planet?
  6. 13. is farther than the orbit of Neptune?
  7. 14. is apart of comet and fallows behind?
  8. 15. loose collection of ice dust and small rocky partials?
Down
  1. 1. the number of dwarf planets in the solar system we live in?
  2. 2. smaller than asteroids but made of ice and chunks of rock?
  3. 4. gas tail or dust tail is a?
  4. 5. fuzzy outer layer?
  5. 6. is a shower of meteors?
  6. 9. looking at things in the sky at night?
  7. 12. rocky objects?