Across
- 1. has high temperatures due to greenhouse effect
- 5. a planet similar to Earth
- 6. to wander
- 8. in 1543 published a book claiming the Sun was at the center
- 10. a model that places the Earth at the center
- 11. only planet known to have life
Down
- 2. cloud of gases may have been what became our solar system
- 3. another word for Earth
- 4. a model that places the Sun at the center
- 7. saw that the obits of planets were elliptical
- 9. second and closest planet to the sun