Across
- 4. consist of the sun, planets and moon.
- 6. the only planet in our solar system that has life.
- 9. planet farthest from the sun.
- 10. called the red planet.
Down
- 1. dry, airless rock that orbits the earth.
- 2. what force formed the solar system.
- 3. small rocky bodies that orbits the sun.
- 5. object that orbits a planet.
- 7. earth's twin.
- 8. star in the center of our solar system.