Space questions

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Across
  1. 4. dwarf planet that used to be a planet
  2. 5. Path of a planet
  3. 6. Centre of the solar system
  4. 7. word that sounds like sun
  5. 9. last planet
  6. 10. Red planet
  7. 11. a shooting star
Down
  1. 1. Number of planets
  2. 2. Biggest planet
  3. 3. group of stars forming a pattern
  4. 8. Gives us day