Space Rocks

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Across
  1. 4. A meteor that does not burn up all the way, and hits the earth
  2. 5. The center of a comet
  3. 7. A chunk of an asteroid or comet that is burning in the Earth's atmosphere
  4. 8. Where comets come from with a "o"
  5. 10. A giant space rock
  6. 11. Where comets come from with a "k"
  7. 12. The tail of a comet that always points away from the sun
Down
  1. 1. Where asteroids come from
  2. 2. A giant space rock made of dust and ice
  3. 3. The tail of a comet that has dust
  4. 6. The dust surrounding a comet
  5. 9. A tiny asteroid