Going into Space

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Across
  1. 1. Name of first living creature to return alive from space
  2. 4. Irishman who wants to go to Mars
  3. 5. First space tourist
  4. 8. First woman in space
  5. 10. first satellite
  6. 11. Type of velocity needed to leave the Earth
  7. 12. path around a planet or star
  8. 13. First man in space
  9. 15. Came up with an equation to estimate the number of aliens civilizations
  10. 16. Permanent home in space
Down
  1. 2. 11 was the first mission to land on the Moon
  2. 3. Orbit where it takes 1 day to travel around
  3. 6. Orbiting astronaut feels weightless, but is really in this
  4. 7. Space Shuttle which exploded shortly after launch
  5. 9. First man on the Moon
  6. 10. Organisation searching for extra-terrestrial life
  7. 14. Second man on the Moon