Space Ace Crossword Puzzle

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Across
  1. 4. result of an imploding star
  2. 5. also known as "minor planets"
  3. 9. Jupiter's largest moon
  4. 12. largest planet in our solar system
  5. 13. Neptune's biggest moon
  6. 14. seventh planet from the sun
  7. 16. ours is called the milky way
  8. 18. the planet which we live on
  9. 20. the red planet
Down
  1. 1. dwarf planet named after the Roman god of the underworld
  2. 2. patterns in the sky made by groups of stars
  3. 3. Pluto's biggest moon
  4. 6. also known as a "dirty snowball"
  5. 7. Saturn's largest moon
  6. 8. planet named after the Roman god of the sea
  7. 10. planet closest to the sun
  8. 11. life source for the Earth
  9. 15. planet that most rings in our solar system
  10. 17. hottest planet in our solar system
  11. 19. space team that launched the Apollo 11 mission