Across
- 2. - Soviet human spaceflight program.
- 4. - First soft landing on the Moon.
- 8. - Rocket used in Mercury program.
- 10. - Russian space traveler.
- 12. - Soviet rocket engineer.
- 13. - NASA moon probes.
- 18. - Early US satellite program.
- 19. - US rocket engine manufacturer.
- 20. - US launch site.
Down
- 1. - Soviet spacecraft designer.
- 3. - Early communication satellite.
- 5. - Early American rocket.
- 6. - First artificial satellite.
- 7. - US manned space program.
- 9. - US satellite series.
- 11. - Soviet moon probe series.
- 14. - Term for astronaut.
- 15. - First living creature in space.
- 16. - Soviet lunar probes.
- 17. - First human in space.