Across
- 2. nicknamed the "red planet"
- 4. the last four planets
- 6. another word for an object going around a planet
- 7. the first four planets
- 9. closest planet to the sun
- 11. a celestial body in the solar system
- 13. moving rapidly around another object
Down
- 1. the planet with the most prominent rings
- 3. the first outer planet
- 5. hottest planet
- 6. the center of the solar system
- 8. the only planet with known life
- 10. a planet's path around the sun
- 12. the furthest planet away