| Answer | Crossword Clue |
|---|---|
| BALLISTICS | Science of motion of projectiles. |
| ballistics | the science of the motion of projectiles; esp that part of the subject connected with firearms |
| GUNNERY | Science of flight of projectiles. |
| ballistics | The science of projectiles and firearms |
| needlers | (in science fiction) A weapon that fires needlelike projectiles |
| astrodynamics | the science of the motion of bodies in outer space and the forces that act on them |
| tribology | The study of friction, wear, lubrication, and the design of bearings; the science of interacting surfaces in relative motion |
| astrodynamicist | one who studies astrodynamics, the science of the motion of bodies in outer space and the forces that act on them |
