Rocket Science

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Across
  1. 3. hard to pull something
  2. 6. hard to push something
  3. 7. point of equal gravity on all sides
  4. 8. Father of the US rocketry
  5. 10. all pressure is on an object
  6. 13. a famous philosopher created three of these; this is the 3rd one
  7. 16. "GPS" on a rocket
Down
  1. 1. term used for something moving in a given direction
  2. 2. smooth ride
  3. 4. object launched to go somewhere high
  4. 5. famous philosopher's created three of these; this is the 1st one
  5. 9. aerospace engineer and a space architect from Germany
  6. 11. change in energy of an object
  7. 12. this helps things go forward
  8. 14. Opposite of laminar
  9. 15. a rocket does this every time it gets launched