International Space Station Crossword Puzzle

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Across
  1. 5. Path the station follows around Earth
  2. 6. How water is treated on the station
  3. 9. Russian spacecraft that serves as an escape pod
  4. 11. Observatory module with seven windows
  5. 13. Shape of the station's path around Earth
  6. 14. Mechanical arms used to assemble station parts
  7. 17. Person who lives and works on the ISS
  8. 18. Direction pointing toward Earth
  9. 20. Space junk that poses collision risks
Down
  1. 1. Direction facing away from Earth
  2. 2. Near weightless environment on the ISS
  3. 3. The absence of air in space
  4. 4. Connected compartments that form the station
  5. 7. Essential gas produced by the life support system
  6. 8. Activity performed outside the station
  7. 10. Astronomer who predicted humans would live in space
  8. 12. Where scientific experiments are conducted
  9. 15. Vehicle that delivered many ISS components
  10. 16. Arrays that provide power to the station
  11. 19. Orbiting laboratory 250 miles above Earth