Across
- 2. Robotic explorer on Mars.
- 4. Soviet space program.
- 6. Space telescope launched in 1990.
- 8. First U.S. manned space program.
- 12. International Space Station.
- 13. Soviet moon probe series.
- 16. 1969 historic event.
- 18. Second man on the moon.
- 19. U.S. space agency.
- 20. First name of Armstrong.
Down
- 1. President who challenged to go to the moon.
- 3. NASA moon mission program.
- 5. Reusable spacecraft program.
- 7. First man on the moon.
- 9. Moon landing craft.
- 10. First artificial satellite.
- 11. Gagarin's spacecraft.
- 14. Context for the Space Race.
- 15. Program preparing for moon landing.
- 17. First human in space.