The Solar System

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Across
  1. 4. a huge burning ball of superheated gas
  2. 5. a large object that orbits a star
  3. 7. the star at the center of our solar system
  4. 9. the closest planet to the sun
  5. 11. a small planet-like body that orbits Earth
  6. 13. a large system of stars, gas, and dust
  7. 17. everything that exists in space
  8. 18. the way the moon appears to change shape
Down
  1. 1. the largest planet in the solar system
  2. 2. the only planet to orbit on its side
  3. 3. the planet with the most visible rings
  4. 6. the hottest planet in the solar system
  5. 8. an imaginary line that goes through both poles of a planet
  6. 10. the only planet that can support life as we know it
  7. 12. the furthest planet from the sun
  8. 14. Earth's path as it moves around the sun
  9. 15. the "Red Planet"
  10. 16. (2 words) the length of time it takes for Earth to rotate once around its axis