Across
- 3. Sunlight striking dust grains that impart a tiny force to the dust tail
- 8. Contain traces of radioactive material that can be used to determine age
- 9. When breakup occurs
- 10. A swarm of trillions of icy bodiesthat lie far beyond the orbit of Neptune
- 11. Happens when a force that acts repeatedly on a body constantly re-inforces the body's motion
- 13. All grains move in the same direction, away from the Sun
- 14. Larger peices that manage to get to the ground
- 16. Pass in front of
- 18. Rocky or metallic bodies that can sometimes be considered dwarf planets
- 19. A flow of ions that streams from the Sun into space
- 22. Small, Planet like bodies
- 23. Planets that are gaseous and liquid
- 25. Produced when light at one wavelength is converted to light at another wavelength
Down
- 1. Usually a blue-ish color and points directly away from the Sun
- 2. A long, narrow column of dust and gas
- 4. Planets orbiting stars other than the sun
- 5. Seemingly empty regions in the asteroid belt
- 6. Meteorites that have a lumpy structure
- 7. A cloud of gas of which the tail emerges
- 12. A region between the orbits of Mars and Jupiter
- 15. A solid body, while in space and before it reaches the atmosphere
- 17. Stony meteorties that dont have chondrules
- 20. Planets that are small rocky bodies with relatively thin or no atmospheres
- 21. A glowing trail of hot gas and vaporized debris left by a solid object heated by frictionas it moves through Earth's atmosphere at extremely high speed
- 24. Steep cliffs that run for hundreds of kilometers across Mercury's surface