Across
- 3. closest planet to the sun
- 5. force that causes a planet to keep moving, keeps planets on orbit
- 7. planet with a day lasting 24 hours
- 9. shape of planet's orbit
- 10. planet with a day lasting 243 earth days
- 11. special path that planets take through space
- 13. time it takes for a planet to orbit the sun completely
Down
- 1. two words, our solar system is part of this galaxy
- 2. planet with a day lasting 10 earth hours
- 4. number of stars and planets in the universe
- 6. force like "an invisible rope" from the sun that pulls on planets keeping them in orbit
- 8. fourth closest planet to the sun
- 12. amount of time it takes for a planet to spin on it's axis once