Space Crossword

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Across
  1. 4. the return from outer space into the earth's atmosphere
  2. 5. portable life-support system
  3. 7. pertaining to the mind
  4. 9. a line attaching the Skylab to a spacecraft
  5. 10. extravehicular mobility unit
  6. 12. pay no attention
  7. 15. pertaining to the heart
  8. 17. trash airlock
  9. 18. calcium lose
  10. 19. Simplified aid for EVA rescue
  11. 20. restraint rope
Down
  1. 1. the state of being contaminated.
  2. 2. able to supply its own needs without external assistance
  3. 3. unintentional
  4. 6. tablets
  5. 8. oxygen occurring as a single atom
  6. 11. the feats of an acrobat
  7. 13. force of gravity
  8. 14. geosynchronous Earth orbit
  9. 16. confined to bed because of illness