Across
- 3. a neighbouring galaxy
- 6. a planet that can sustain life
- 7. an huge object comprising a spheroid of plasma
- 9. the closest star to you
- 11. a shield around earth making it sustainable for life
- 12. large pieces of floating rock
- 15. a small piece of rock considered to be part planet
- 16. a red planet
- 18. a natural satellite
- 19. the biggest planet in the solar system
Down
- 1. the smallest planet in the solar system
- 2. cosmic snowballs
- 4. the coldest planet in the solar system
- 5. a tilted planet
- 8. name comes from a love goddess
- 10. a dead star
- 11. species of organisms living on planets beside earth
- 13. hoola-hoops surrounding certain planets
- 14. a gravitational field so intense that no matter or radiation can escape
- 17. has icy rings