First Footsteps of an Astronaut

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Across
  1. 1. Scientific studies or tests
  2. 4. Atmospheric flying machine for transport
  3. 7. A Vehicle for travelling in space
  4. 8. Ill feeling after constant movement
  5. 13. A person who travels to space
  6. 14. Number of people living somewhere
  7. 16. The outer layer of an object
Down
  1. 2. The universe outside earth's atmosphere
  2. 3. Brave
  3. 5. Second in command to a pilot
  4. 6. unsafe
  5. 9. Causing discomfort and stress
  6. 10. The natural satellite of the earth
  7. 11. To set in motion
  8. 12. Very loud
  9. 15. Related to the moon