Across
- 2. All planets rotate on an _____
- 7. The third planet away from the Sun
- 8. In the middle of the inner and outer planets
- 9. One complete trip around the Sun
- 10. The composition of the outer planets
Down
- 1. 24 hours on Earth
- 3. The sixth planet away from the Sun
- 4. Forms when a comet's gasses melt as it gets closer to the Sun
- 5. Our home galaxy
- 6. Moons orbit ______