Across
- 3. Category name of the four innermost planets based on their surfaces
- 5. Name of the protoplanet that collided with Proto-Earth to form the moon
- 7. The number of moon phases in one cycle
- 9. _____ Distance = Stronger Gravity
- 11. Category name of the four outermost planets based on their surfaces
- 13. Eclipse that happens during the day
Down
- 1. _____ Mass = Stronger Gravity
- 2. Ex-planet now considered to be a dwarf planet
- 4. The fourth moon phase is a ____ gibbous.
- 6. Second planet from the sun
- 8. A planet's path around the sun
- 10. Eclipse that happens at night
- 12. Name of the original 1960's/1970's missions to the moon