Across
- 3. any of numerous small celestial bodies that may have existed at an early stage of the development of the solar system
- 6. a doughnut-shaped region of icy objects beyond the orbit of Neptune
- 11. a solid piece of debris from an object
- 12. Earth like planets made up of rocks or metals with a hard surface
- 13. dust grains to small asteroids
- 14. Earth passes through the path of a comet
- 15. some noticeable deviation in behavior, style, or manner from what is normal or expected
- 16. a region of space between the orbits of Mars and Jupiter where most of the asteroids in our Solar System are found orbiting the Sun
- 17. the main constituent of gas giant planets
Down
- 1. large planet mostly composed of helium and/or hydrogen
- 2. ice planets for example pluto
- 4. a closed-plane curve that results from the intersection of a plane cutting through a cone
- 5. orbits the sun and has a long "tail" of gas
- 7. a line of cliffs formed by the faulting or fracturing of the earth's crust
- 8. the distance from a star that allows liquid water to persist on its surface
- 9. the orbital motion of a spatial body in a direction that is opposite of what is normal in a given system
- 10. the mean distance between the center of the Earth and the center of the sun
- 11. streak of light to appear in the sky
