Across
- 1. home of the great red spot
- 5. highly accepted theory on how the solar system formed
- 6. not a planet any longer
- 7. this type of pollution makes it hard to see stars
- 8. inner planets made mostly of this
- 11. the path a planet takes around the Sun
- 13. the solar system's star
- 15. mariner 10 visited this planet
- 16. cluster of asteroids that orbit the sun
Down
- 2. planet travels around the Sun
- 3. number of planets
- 4. second largest gas giant
- 9. made of ice and gas and sometimes has a tail
- 10. this planet might have frozen ice caps on the poles
- 12. planet spins around its axis
- 14. outer planets made mostly of this