Ask an Explainer
Using rockets strategically placed on a space craft assists manoeuvring, but what do the rockets thrust against when firing if there is nothing in space?
Inside a rocket engine, you have a combustion, or a very hot fire. This is creating pressure, and it pushes against every side of the engine. But the hole at the back, the exhaust, is letting some pressure out. The push at the front is now greater than the push at the back so the rocket moves forward!