Man on the moon

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Across
  1. 6. Neil Armstrong's nationality
  2. 7. He orbited around the moon
  3. 10. Our planet
  4. 11. The astronauts splashed down in this ocean
  5. 13. Curved path of a celestial object round a planet
  6. 17. Second man on the moon
  7. 18. First man on the moon
  8. 19. That's one small step for man, one giant leap for...
  9. 20. Synonym of spaceship
Down
  1. 1. The Apollo crew blasted off from the...
  2. 2. Above the atmosphere
  3. 3. American President in the early sixties
  4. 4. They left one on the moon
  5. 5. Name of the spaceship that stayed in space
  6. 8. American President in the late sixties
  7. 9. Number of astronauts on the Apollo 11 mission
  8. 12. A person who is trained to travel in a spacecraft
  9. 14. Space group
  10. 15. We'll go there someday
  11. 16. Lunar module