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