Across
- 2. the center of our solar system.
- 4. the smallest planet in our solar system
- 5. this planet is Earth's sister planet
- 9. Scientists are studying this planet to see if humans can live here one day.
- 11. this planet is the furthest away from the sun.
Down
- 1. this planet is the biggest planet in the solar system.
- 3. this dwarf planet used to be our ninth planet.
- 4. the Earth has one ___ , but Jupiter has 79!
- 6. this planet is 70% water.
- 7. this planet is known for its beautiful rings.
- 8. this planet is the coldest planet in our solar system.
- 10. we can use this to see planets and stars.