Across
- 1. name of inner planets
- 4. there is more than 165 of these in are solar system
- 5. leftover remains of the formation of the solar system
- 7. pieces of rock floating in space
- 8. determind planets moved in nelises
- 9. name of outer planets
- 10. invented reflecting telescope
Down
- 2. planets move in this orbit
- 3. are often referred to as "dirty snowballs"
- 6. they do not have enough mass to clear the orbit from debris