Astronomy 101 Chapter 7 Crossword

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Across
  1. 1. Our sister planet
  2. 3. Four outer gas planets
  3. 5. This planet is tipped on its side
  4. 6. The Sun is composed mainly of this element
  5. 10. Icy leftovers from the formation of the solar system
  6. 11. Home
  7. 12. In this type of mission, something is brought back
  8. 13. Mercury looks a lot like our ___________
  9. 14. First planet from the Sun
  10. 15. Pluto is now a ____________
  11. 16. This object has five moons
  12. 17. This planet has the most spectacular rings
  13. 19. This planet is home to the Galilean Moons
Down
  1. 2. Home planet to the moon Triton, a moon that orbits backwards
  2. 4. Venus has a very thick ____________________
  3. 7. The red planet
  4. 8. Rocky leftovers from the formation of the solar system
  5. 9. Four inner rocky planets
  6. 10. Type of planetology that compares planets
  7. 18. Most massive object in our solar system