Across
- 1. Looking for more planets to join this
- 4. There is a lot in the solar system
- 7. Live on Earth
- 9. 4 times as wide as the Earth
- 11. Come off of the sun
- 13. Always is getting bigger
- 15. Half as wide as the Earth
- 16. Color of Uranus
- 19. Called the gass giant
- 20. Helps us breathe in space
- 21. Teaches us all this
Down
- 2. Helps us travel through space
- 3. Scientists haven't found any yet
- 5. Not a planet any more
- 6. Thick clouds of carbon dioxide cover this planet
- 8. Often called the water planet
- 10. Space company
- 11. Hot star
- 12. Has a Ring around it
- 14. The path of a planet
- 15. As big as the united states
- 17. The amount of planets in our solar system
- 18. goes 700 miles per hour