Across
- 3. The layer of our atmosphere that protects us from UV rays
- 4. What planets orbit around
- 5. One _ of a planet is its day
- 6. Earth's is 23 degrees
- 7. One _ is a planet's year
Down
- 1. The _ contains 8 planets and a star
- 2. The force of attraction
- 4. Our star
- 8. Our planet