Across
- 2. hottest planet, earths twin.
- 3. belt of asteroids that divides the inner and outer planets.
- 6. made up of gasses that surround planets.
- 9. moves repeatedly around something.
- 10. Mercury, Venus, and Mars.
Down
- 1. Like earth
- 4. smallest planet.
- 5. celestial object that orbits a planet.
- 7. known as the red planet.
- 8. only planet with known life.