Few of us have a solid grasp of the physics involved in rockets.
The closest I've got to understanding the action-reaction of Newton's Third Law is releasing an inflated balloon and laughing at the acoustic energy.
Apparently said science is all about combustion propellant, specific impulse, gravity from celestial bodies and ballistic coefficients.
It is rocket science, after all.
Nor am I au fait with the arcane laws of space travel.