Across
- 3. used to be called a planet but it is too small
- 6. the next planet humans want to colonize (live on)
- 8. an exploding star
- 10. the third rock from the sun
- 12. a group of stars
Down
- 1. largest planet in our solar system
- 2. a body of space clouds
- 4. the planet with the funniest name
- 5. a region of space with such gravitational force nothing can escape it
- 7. planet with ring around it
- 9. 2nd closest planet to sun
- 11. a metal that is liquid at room temperature
- 13. the King of the sea in Spongebob