Across
- 3. Fast, narrow currents of air high in the atmosphere
- 6. Plain within a large impact basin on Mercury
- 7. Jupiter, Saturn, Uranus, and Neptune
- 10. Four rocky planets
- 11. Minimum distance which a celestial body is held together by its own gravity
- 13. Process where a molecule breaks apart
- 16. Large continent sized highland on Venus
- 18. Largest volcano and tallest mountain on Mars
Down
- 1. Located along the equator of Mars
- 2. Jupiters four largest moons
- 4. Jupiters largest moon
- 5. very steep bank or slope
- 8. Neptunes largest moon
- 9. Saturns largest moon
- 12. System for detecting direction, distance, and speed
- 14. Larger innermost moon of Mars
- 15. smaller of Mars two moons
- 17. planets Outerplanets, Jupiter, Saturn, Uranus, and Neptune
