Rocket engine

A rocket engine is a propulsion system that works by burning fuel and oxidizer together to create hot, expanding gases that are expelled out the back at extremely high speeds. This expelled gas creates a powerful thrust that pushes the rocket forward, following Newton's third law of motion where every action has an equal and opposite reaction. Rocket engines are essential for space travel because they're the only type of engine that can operate in the vacuum of space, where there's no air to push against like traditional airplane engines need.