Across
- 5. a small body of matter from outer space that enters the earth's atmosphere
- 7. Earth-like planets made up of rocks or metals with hard surface
- 9. main constituent of gas giant planets
- 12. a celestial object consisting of a nucleus of ice and dust has a tail of gas
- 13. steep slope or cliff
- 15. a measure of how circular an orbit is
- 16. small body moving in the solar system
- 17. not a real planet
Down
- 1. large planet mostly composed of helium and or hydrogen.
- 2. dark bands
- 3. a region of the solar system beyond the orbit of Neptune
- 4. a body that could or did come together to form a planet
- 5. a number of meteors that appear to radiate from one point in the sky at a particular date each year
- 6. a unit of measurement equal to 149.6 million killometers
- 8. apparent motion of a body in a direction opposite to that of the motions of most members of the solar system
- 10. a meteor that survives its passage through earth's atmosphere
- 11. oval shape
- 14. light colored bands