The Planets

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Across
  1. 1. There are _ _ _ _ _ planets in the Solar System.
  2. 3. Aliens are from another _ _ _ _ _ _.
  3. 8. This planet is named after the Roman God of the Sea.
  4. 9. The planets orbit around this.
  5. 10. Now called the Dwarf Planet.
  6. 11. There are four _ _ _ giants.
  7. 13. A space traveller.
  8. 14. One of the coldest planets.
  9. 15. The smallest planet of the eight.
  10. 19. Our home.
  11. 20. The curved path taken by a planet around the Sun.
Down
  1. 2. Force that keeps a planet moving in orbit.
  2. 4. Use this to observe planets.
  3. 5. This planet has no moons.
  4. 6. Is the giant of our Solar System.
  5. 7. Earth has one _ _ _ _.
  6. 12. The planet with the most visible rings.
  7. 16. A vehicle designed to travel through space.
  8. 17. Nicknamed "The Red Planet".
  9. 18. Twinkle twinkle little _ _ _ _.