Across
- 2. the planet closest to the sun
- 4. the ringed planet
- 5. our planet
- 7. the seventh planet
- 10. the second planet
- 11. not a planet anymore
- 12. the fourth planet
- 14. a rock floating through space
- 16. the eighth planet
Down
- 1. when a meteor hits the Earth
- 2. biggest thing in our night sky
- 3. biggest explosion in the universe
- 6. the biggest planet
- 8. our star
- 9. the name of our galaxy
- 13. when the moon moves between the sun and the Earth
- 15. a space rock that enters our atmosphere