Across
- 3. relating to outer space
- 5. an group of stars that form a pattern
- 7. home
- 10. the fourth planet from the sun
- 12. National Aeronautics and Space Administration
- 14. the closest planet to the sun
- 16. way our solar system is in this galaxy
- 17. the second planet from the sun
- 18. the force that holds us down
- 19. this used to be a planet
Down
- 1. an exploding star
- 2. a Russian astronaut
- 4. hole a giant space vacuum
- 6. a life-form not from Earth
- 8. the study of space
- 9. the fifth planet from the sun
- 11. someone who explores space
- 13. a system of stars
- 15. relating to the moon