Across
- 4. is a band strip
- 8. fragments from their disintegration, erosion and collisions or even paint flecks, solidified liquids expelled from spacecraft, and unburned particles from solid rocket motors.
- 9. a solid piece of debris from an object, such as a comet, asteroid, or meteoroid,
- 10. Big Planets
- 13. a unit of measurement equal to 149.6 million kilometers, the mean distance from the center of the earth to the center of the sun.
- 15. Van Allen Belts
- 17. deviation of a curve or orbit from circularity.
- 18. actual or apparent motion of a body in a direction opposite to that of the (direct) motions of
Down
- 1. a fundamental system in condensed matter sciences and the main constituent of gas giant planets
- 2. Smaller then the gas giants
- 3. Mercury, Venus, Earth, and Mars,
- 5. The sun and moon on top of each other
- 6. When Earth encounters many meteoroids at once
- 7. a streaking of light
- 11. lumps of rock or iron that orbit the sun
- 12. is a donutshape
- 14. a minute planet; a body that could or did come together with many others under gravitation to form a planet.
- 16. different vritys of them
