The Solar System

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Across
  1. 4. The area where Pluto is located
  2. 5. How many asteroids are discovered each month(2 words)
  3. 7. What may cause asteroids to break up
  4. 9. Asteroids that cross the Earths orbit(2 words)
  5. 10. Direction a comet tail always points in relation to the Sun
  6. 13. What would happen if Saturn were put in a giant bathtub
  7. 14. Also known as falling or shooting stars
  8. 16. What happens when Earth passes through a comet tail(2 words)
  9. 17. Olympus Mons compared to Mt.Everest(3 words)
  10. 23. Only planet known to have life
  11. 25. The kind of pull that Neptune has on Uranus
  12. 32. The type of acid in the clouds of Venus
  13. 33. Where short-period comets come from(2 words)
  14. 35. Closest planet to the Sun
  15. 37. Planet named after the god of the sea
  16. 38. How many times is the air pressure on Venus compared to the Earth
  17. 39. Planet most likely to be visited first by humans
  18. 40. Largest planet in the Solar System
  19. 41. Planet most famous for its rings
Down
  1. 1. Planet with the strongest winds
  2. 2. What causes a meteor to vaporize
  3. 3. Process that makes Venus so hot (2 words)
  4. 6. Substance that gives Mars its red color
  5. 8. The biggest moon in the Solar System
  6. 11. A substance in the clouds of Jupiter
  7. 12. Why Mercury has such long days(2 words)
  8. 15. Where long-period comets come from(2 words)
  9. 18. How many Earth days make up a year on Mercury(2 words)
  10. 19. Rocks from space that hit the surface of the Earth
  11. 20. Writer that has moons named after his characters
  12. 21. Rocky bodies usually located between Mars and Jupiter
  13. 22. Moon of Jupiter that may have liquid water
  14. 24. What causes the gaps in Saturns rings
  15. 26. Type of machines moving on the Martian surface right now
  16. 27. Planet closest in size to the Earth
  17. 28. A moon that orbits its planet opposite to how the planets goes
  18. 29. Moon with an atmosphere much like an early Earth
  19. 30. The unusual way that Uranus rotates
  20. 31. The mass of Pluto compared to our Moon(2 words)
  21. 34. Planet most joked about
  22. 35. Gas that causes Uranus to look blue-green
  23. 36. A moon of Pluto