Across
- 3. The planets and their moons
- 4. Picture sent back from space
- 6. Referring to the outer planets
- 10. Long voyage through space
- 11. Field of study of the universe
- 14. A celestial body's shape
- 16. Ringed jewel of the solar system
- 18. Volcanically active Jovian moon
- 20. Sideways-rotating ice giant
- 22. Feature of gas giants
- 24. Largest moon in the solar system
- 26. Famous astronomer, Sagan
- 28. Moon of Uranus with strange terrain
- 31. Spacecraft that explored outer planets
- 33. Planetary atmospheric light show
- 34. Maneuver to gain speed
- 36. Saturn's largest moon with atmosphere
- 37. Farthest planet in Grand Tour
Down
- 1. Agency behind the mission
- 2. Prefix for the sun's sphere of influence
- 3. Great Red Spot on Jupiter
- 5. Relating to a planet's magnetic field
- 7. Neptune's largest, retrograde moon
- 8. Geysers observed on Triton
- 9. Robotic spacecraft type
- 12. Icy moon of Jupiter
- 13. To discover new things
- 15. Largest planet visited first
- 16. Narrator of "Cosmos"
- 17. Predecessor mission to Jupiter
- 19. Natural satellite of a planet
- 21. Communication from spacecraft
- 22. Phonograph disc aboard Voyager
- 23. Material of the record carried
- 25. Close approach to a celestial body
- 27. Used for assist maneuvers
- 29. Used to transmit and receive signals
- 30. Information collected by spacecraft
- 32. Type of giant planet
- 35. Pertaining to our star system