Across
- 2. This planet has 63 moons
- 5. Originally a planet until 2006
- 6. Composed of ice and water
- 7. The most geologically active body in the Solar System
- 10. Cloud of dust and gas
- 11. Composed of hydrogen, helium, and methane
- 13. Made of ice and snow
- 14. Takes 600 years to revolve around the sun
- 15. Third-largest moon
- 17. A celestial body that lies in the asteroid belt
- 18. Third-largest dwarf planet
- 19. 4th planet in the Solar System
Down
- 1. Atmosphere made of carbon dioxide
- 3. Formed at the center of the disk
- 4. Grains of dust collide and clumped together
- 8. Bowl-shaped depressions
- 9. The largest moon in the Solar System
- 12. Planets outside the Solar System
- 16. Rings that are made of dust, rocks, and ice