Across
- 4. Closest planet to the Sun.
- 5. Largest planet in our solar system.
- 8. Farthest planet from the Sun.
Down
- 1. Largest object in the asteroid belt.
- 2. The "sideways" planet.
- 3. Known for its rings.
- 4. The Red Planet.
- 6. Once considered the ninth planet.
- 7. Known as Earth's "sister planet."
- 9. Our home planet.