Across
- 3. in the 1600s, saw planets moving in ellispse
- 6. to wander
- 9. earth at center
- 10. second closest to the sun
- 13. the red planet
- 14. divides inner planets from outer planets
- 15. another word for earth
Down
- 1. cloud of gas, ice,hydrogen, helium, and dust
- 2. hotter than mercury due to greenhouse effect
- 4. first to write about a heliocentric solar system
- 5. associated with the geocentric model of the solar system
- 7. sun at center
- 8. only planet known to have life
- 11. planets in orbit around other stars
- 12. with telescopes saw evidence to support Copernicus