Across
- 3. acid rain and sulfur
- 8. a solid piece of debris that passed through the atmosphere
- 10. the dense blue gas god of the sea
- 11. the big blue Greek god of the sky
- 12. dramatic rings of ice and rock
Down
- 1. the biggest planet in our solar system
- 2. small, minor planets made of minerals, metal and ice
- 4. the farthest former planet
- 5. a great cloud of glowing gas lit by stars
- 6. a natural satellite of a planet
- 7. the red planet
- 8. small, speedy, hot and cold
- 9. intelligent life