Across
- 1. The centre of our solar system.
- 2. How many planets are there in our solar system?
- 4. The smallest planet.
- 6. The farthest planet from the sun.
Down
- 1. The sun is a ______.
- 3. The biggest planet of all.
- 5. The hottest planet.
- 7. The planet that people live on.