Across
- 2. the Earth
- 4. the galaxy
- 6. gravity
- 7. the comet
- 9. the planet
- 10. the star
- 13. the sky
- 15. space shuttle
- 17. space
- 18. the constellation
- 20. asteroid belt
Down
- 1. the moon
- 3. the spaceship
- 5. the astronaut
- 8. to explore
- 11. the universe
- 12. the universe
- 14. astronomy
- 16. the telescope
- 19. the alien