Human Adaptation to Space

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Across
  1. 3. take something away from
  2. 4. in one or more directions
  3. 5. act or process of depicting or portraying
  4. 6. and propagation and emission of energy in the form of rays or waves
  5. 7. follow in an effort to overtake or capture; chase
  6. 8. path of a celestial body or an artificial satellite as it revolves around another body
  7. 12. substance, such as a liquid or gas, that can flow, has no fixed shape, and offers little resistance to an external stress
  8. 13. in accord with or characteristic of the normal functioning of a living organism
  9. 16. to a galaxy
  10. 18. lack of order or regular arrangement; confusion
  11. 19. feeling of sickness in the stomach characterized by an urge to vomit
Down
  1. 1. natural force of attraction exerted by a celestial body, such as Earth, upon objects at or near its surface, tending to draw them toward the center of the body.
  2. 2. operated by, or performed by a human
  3. 3. period of existence or persistence
  4. 9. curve outward
  5. 10. keep in existence; maintain.
  6. 11. perceive or indicate differences; discriminate
  7. 14. chance of being injured or harmed; danger
  8. 15. physical or mental disorder, especially a mild illness
  9. 17. act or an instance of exposing