Across
- 3. the outermost layer of earth
- 6. solid bulk of earths interior
- 9. dense center of the earth
- 11. A canyon system system on mars equator
- 13. ice poles beneath the surface of mars
- 14. a space exploration vehicle
- 15. the larger moon for mars
Down
- 1. the third layer of earth
- 2. a star which the earth orbits
- 4. an celestial body orbiting earth or other planets
- 5. a shield volcano mountain on mars
- 7. a crater on a planet or moon from an meteorite
- 8. fourth planet from the sun
- 10. when an orbit from an planet lines up opposite of a other planet
- 12. the smaller moon for mars