Across
- 4. the twin planet of the earth
- 5. when gas cools and it molecules stick together
- 8. a swarm of ice bodies
- 10. distant worlds out of our solar system
- 12. celestial bodies in kupier belt
- 13. the name of an asteroid belt
- 14. gigantic gas body in our system
- 16. large balls of ice shooting across space
- 18. a large whip of energy from the sun
- 19. planet named after the roman harvest god
- 20. large chunks of space rock formed into a body
- 23. planet with a big red spot
- 24. small particles in space
- 25. grains of a fallen meteor
Down
- 1. a streak following a comet
- 2. debris of dust and gas around a planet
- 3. an enormous amount of space gas
- 6. building blocks of planets
- 7. tiny grains clumped together to move super fast
- 9. when meteors come from the same direction
- 11. the outermost planet in our system
- 15. planets not big enough to be planets
- 17. chunks of space rock shooting down towards earth
- 21. the effect of which keeps gasses in
- 22. empty regions in asteroid belts