Across
- 3. meteor that reaches earth's surface
- 4. the inner planets are called ____
- 7. coldest planet
- 9. chunks of rock floating through space
- 10. leftover remains from the formation of the solar system
Down
- 1. long dust trail
- 2. the first scientist to believe in the heliocentric system
- 5. celestial body orbiting the sun
- 6. closest planet to the sun
- 8. "the big dipper"