What is the difference between jet engines and spaceships?

Jet engines operate by drawing in air, compressing it, mixing it with fuel, and igniting the mixture to produce thrust, relying on atmospheric oxygen for combustion. In contrast, spaceships use rocket engines, which carry both fuel and an oxidizer, allowing them to operate in the vacuum of space where there is no air. This fundamental difference allows jet engines to function within Earth's atmosphere, while rocket engines are designed for the challenges of space travel. Additionally, rocket engines typically generate much higher thrust to escape Earth's gravitational pull.