Across
- 3. Celestial body orbiting Earth
- 4. Smallest planet
- 7. Rocky planet/Earth-like
- 8. Biggest inner planet
- 9. To move repeatedly around
Down
- 1. Gasses surrounding a planet
- 2. Rotates west to east
- 5. Atmosphere contains mostly nitrogen and oxygen
- 6. Hottest planet
- 8. Has a magnetic field