Across
- 3. a spherical shell of small icy bodies (as comets) that orbit the sun far beyond Pluto
- 4. the area around everything that exists, continuing in all directions
- 6. a layer of gas and suspended solids extending from the Earth's surface up many thousands of miles
- 7. disk-shaped region between mars and Jupiter filled with asteroids
- 9. small objects that orbit our sun composed of ice and dust
Down
- 1. pieces that break off comets or asteroids that float through space
- 2. a doughnut-shaped region of icy objects beyond the orbit of Neptune. It is home to Pluto and most of the known dwarf planets and some comets.
- 5. meteors that hit the earths surface
- 7. small irregularly shaped chunks of rock that orbit the sun but are much too small to be considered planets
- 8. pieces that break off comets or asteroids that enter earths atmosphere