Across
- 2. Rocket used by NASA for space missions
- 5. First living creature in orbit
- 6. Famous Russian spacecraft
- 7. First human in space
- 9. Soviet astronaut
- 12. Soviet Mars probe
- 14. Soviet spacecraft for lunar exploration
- 15. Space launch vehicle
- 17. Series of US scientific satellites
- 18. NASA's first human spaceflight program
- 20. Outer space astronaut activity
Down
- 1. NASA's program for space travel
- 3. first American to orbit the Earth
- 4. Apollo spacecraft part
- 8. Soviet human spaceflight series
- 10. NASA's moon-landing program
- 11. Moon-exploring spacecraft
- 13. First artificial satellite launched
- 16. Competition between US and USSR
- 19. Early US satellite program