Other solar system bodies

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Across
  1. 1. comes from the kuiper belt
  2. 4. almost a planet
  3. 5. what caused the dinosaurs to go extinct
  4. 6. second oldest scientist(we have looked at)
  5. 7. the biggest of the dwarfs
  6. 8. shooting stars
Down
  1. 2. the way planets orbit the sun
  2. 3. apple fell on his head
  3. 8. orbits planets
  4. 9. ball of fire