Across
- 1. a mass that orbits around another planet, not the sun
- 4. how hot or cold a planet is.
- 7. a planet where a year there is twice the length of a year on earth
- 8. a belt of asteroids that circles a planet
Down
- 1. the smallest planet in the solar system
- 2. what causes planets to move around the sun
- 3. what is called when a planet does a full rotation around the sun.
- 5. the only planet with life in our solar system
- 6. the hottest planet in our solar system