Space Crossword

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Across
  1. 3. The smallest planet
  2. 9. The second planet from the sun
  3. 10. The four largest moons of Jupiter
  4. 13. The time it takes an object to complete one rotation
  5. 14. A small, rocky particle that moves through space
  6. 15. The largest planet in the solar system
Down
  1. 1. Made of gas, dust, and ice
  2. 2. The time it takes an object to travel once around the sun
  3. 4. The least dense planet
  4. 5. The average distance from Earth to the sun
  5. 6. A small, rocky object
  6. 7. Has two very small and irregularly shaped moons
  7. 8. Large bodies of water exist on this planet
  8. 11. Triton, is its largest moon
  9. 12. Has a system of narrow, dark rings