Across
- 3. these can stretch behind a comet for 60 million miles
- 5. an icy object that occasionally visits the inner solar system
- 8. an object before it enters earth's atmosphere
- 9. planet on the far side of the asteroid belt
- 11. abbreviation for near earth objects
- 13. an object from space that is burning up in the atmosphere
- 14. outer solar system shell of trillions of comets
- 16. asteroid that could hit earth in 2036
- 18. location of a 1908 asteroid strike
Down
- 1. measure of an explosion equal to 1000 tons of TNT
- 2. the location of most of the asteroids in the solar system
- 4. a rocky or metallic object, smaller than a planet, that orbits the sun
- 6. location of a 2013 meteor explosion
- 7. the center of a comet
- 10. an object from space that has landed on the ground
- 12. the fuzzy part around the center of a comet
- 13. planet on the near side of the asteroid belt
- 15. measure of an explosion equal to 1 million tons of TNT
- 17. a famous comet that returns every 76 years