The Inner Planets

1234567891011
Across
  1. 1. has high temperatures due to greenhouse effect
  2. 5. a planet similar to Earth
  3. 6. to wander
  4. 8. in 1543 published a book claiming the Sun was at the center
  5. 10. a model that places the Earth at the center
  6. 11. only planet known to have life
Down
  1. 2. cloud of gases may have been what became our solar system
  2. 3. another word for Earth
  3. 4. a model that places the Sun at the center
  4. 7. saw that the obits of planets were elliptical
  5. 9. second and closest planet to the sun