Space Exploration

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Across
  1. 2. an object that orbits a planet
  2. 7. I--? SS
  3. 8. a false limb
  4. 11. a condition of weightlessness
  5. 13. map of mars released by NASA
  6. 15. name of dog on Sputnik 2
  7. 16. year of first man on moon
Down
  1. 1. Thermometer for monitoring health.
  2. 3. sent first images of earth
  3. 4. name of first mars rover
  4. 5. completed first ever orbit of mercury in 2009
  5. 6. the forces at take off
  6. 9. Global -----? system
  7. 10. name of comet visited by nasa in 2006
  8. 12. spacecraft used by Neil Armstrong
  9. 14. year of first unmanned landing on moon
  10. 16. year sputnik 1 is launched