Across
- 3. ninth planet in the solar system (dwarf planet).
- 5. eight planet in the solar system.
- 7. an object that orbits a larger object.
- 8. second planet in the solar system.
Down
- 1. those are nine in number.
- 2. small objects mostly made of ice.
- 4. fifth planet in the solar system.
- 6. smaller than the asteroids or comet.
- 9. the biggest star.
