Solar System

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Across
  1. 2. celestial objects that don't belong with planets
  2. 5. planets composed mostly of rock and metal
  3. 6. the hottest planet
  4. 8. small rocky objects from space
  5. 11. a young star
  6. 12. a cloud of dust and gasses
  7. 14. icy, rocky, objects with two tails
  8. 16. a planet that has rings
Down
  1. 1. area of space beyond the orbit of jupiter
  2. 3. celestial body that lays on the asteroid belt
  3. 4. the biggest planet
  4. 7. matter developing into a planet
  5. 9. a dwarf planet
  6. 10. mostly gaseous planets
  7. 13. a cloud of icy planetesimals
  8. 15. the only planet that can sustain human life