Jobs in space

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Across
  1. 2. The fact of having no weight
  2. 3. A person who advises people about the law
  3. 5. Build, begin (a base)
  4. 8. Send something into space
  5. 10. Make better; become better
  6. 11. A vehicle that travels in space
  7. 13. A large system of stars, in outer space
  8. 14. A program that runs in a computer
  9. 16. The trajectory followed by a planet in space
  10. 17. An electronic device in space used for communication
Down
  1. 1. Show or introduce something new; reveal
  2. 4. A person trained to travel in space
  3. 6. Where it is possible to live
  4. 7. Somebody who studies science
  5. 9. Our planet
  6. 12. The force that attracts objects in space
  7. 15. Touch the ground (a rocket or a plane)