Across
- 2. Rocky object, in between Jupiter and Mars
- 8. Middle of a comet
- 9. Frozen material in a comet
- 10. Comet seen from Earth every 76 years
- 11. Cloud Big cloud far from the Sun
- 12. force that pulls objects together
- 15. tiny space rock
- 16. glowing path behind a comet
- 17. old and dirty snowball
Down
- 1. circular hole made by a collision
- 3. path of particles from the Sun
- 4. small particles in space
- 5. A place past Neptune that has icy objects
- 6. A space rock which hits Earth
- 7. the material in asteroids that's solid
- 13. A crash with objects in space
- 14. The path an object goes around the Sun
- 15. a line of light in the sky