The Solar System Crossword

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Across
  1. 4. What a meteoroid is known as when it enters Earth's atmosphere
  2. 7. The planet named after the Roman god of war
  3. 8. A small rock body which orbits the sun
  4. 9. A middle aged dwarf star at the centre of the Solar System
  5. 10. The eighth planet from the sun
  6. 12. The only planet to be downgraded to a dwarf planet
Down
  1. 1. Cosmic snowballs that form tails when nearing the sun
  2. 2. The only planet to rotate in the opposite direction
  3. 3. The only planet to rotate on it's side
  4. 5. The biggest gas giant planet in the Solar System
  5. 6. The closest planet to the sun
  6. 7. Earth's only natural satellite
  7. 9. The planet with the most notable rings
  8. 11. The only planet known to contain life in the Universe