Across
- 1. type of planet that is too small to be considered a regular planet
- 3. the motion of moving around another object
- 5. the gravitational phenomenon that causes us to only see one side of the Moon
- 8. we have sent rovers to this planet
- 9. area of gas and dust where stars are "born"
- 11. the unit used to measure distance inside our solar system
- 14. Earth's natural satellite
- 15. Jupiter's moon that is believed to have water under its icy crust
Down
- 2. region between the inner planets and outer planets
- 4. the motion of spinning on an axis
- 6. a massive system that is held together by gravity that includes countless stars, nebulas, planets, etc.
- 7. the path of one object around another object
- 10. the object at the center of our solar system
- 12. a result of the gravitational pull between the Earth, Sun, and Moon
- 13. the unit used to measure distance outside of our solar system