Across
- 3. - The force that keeps the planets in orbit around the Sun
- 6. -The planet with rings made of ice and rock
- 7. -The planet known as the "Red Planet"
Down
- 1. - The smallest planet in the solar system
- 2. -The only planet known to support life
- 4. -The planet famous for its extreme temperatures and thick atmosphere
- 5. -The closest planet to the Sun
- 7. - A natural satellite that orbits the Earth