Solar System Crossword

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Across
  1. 1. Summer, Spring, Autumn and Winter are all classified as what?
  2. 4. the motion of an object around another caused by gravity
  3. 5. the time it takes a planet to orbit around the sun
  4. 9. the time it takes for a planet to rotate once
  5. 10. Uranus and Neptune are classified as what kind of planet?
  6. 11. a rare event where an object in space blocks another's view
  7. 14. a large arrangement of billions of stars
  8. 16. ______ model; the Earth is placed in the centre
  9. 17. large rock in space that revolves around the sun
Down
  1. 2. All of our planets and the Sun exist in what system?
  2. 3. an attractive force between any objects that have mass
  3. 6. a rock or natural object that orbits a planet
  4. 7. a representation of an idea, object or system
  5. 8. the galaxy we live in
  6. 12. a ball of gas that produces light and heat
  7. 13. Jupiter and Saturn are both what kind of planet?
  8. 15. ______ model; the Sun is placed in the centre