Across
- 1. formed from debris
- 4. first to believe in heliocentric
- 5. made of rock
- 7. chunks of rock
- 9. first person to belive in a geocentric world
- 10. have an irregular shape
Down
- 2. made of gas
- 3. known as diry snow balls
- 6. burns up when entering earth
- 8. used a telescope to make observations