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Across 4. present on Mercury instead of an atomsphere 6. crater on Venus 8. the atmopshere of Neptune contains these 9. makes up part of 11. he discovered Pluto 13. 95% of Mars' atmosphere 14. Mars is known as the ___ planet 17. number of moons of Uranus 20. largest volcano in the SS 21. largest moon of Neptune 22. Saturn is this color 24. physical feature found on Pluto 25. the atmosphere of Uranus contains particles of this 26. number of rings on Neptune 28. largest moon in the SS 31. the number of moons of Mars 34. 74% of Saturn's atmosphere 36. this planet will float in water 37. one of the moons of Uranus 38. planet discovered on September 23, 1846 39. dark spots on Neptune are these 40. these people knew about Saturn because it is so big 41. Saturn is this planet from the sun 42. He discovered Mars

Down 1. one of two planets without moons 2. large impact crater on Mercury 3. plain on Mercury 5. moon of Pluto 7. large storm on Jupiter 10. He discovered Uranus 12. second smallest planet 15. one of two planets without moons 16. Saturn is lacking this type of surface 18. color of Uranus 19. Uranus has 2 sets of dual rings made of these 23. this spacecraft visited Uranus 26. largest moon of Saturn 27. Jupiter is the most ____ planet 29. largest known dwarf planet 30. Saturn has 62 of these 32. Neptune has this many moons 33. this planet orbits on its side 35. the mantle of Jupiter is made of liquid ___ 36. these last 42 years on Uranus