Jet engines are powerful machines that propel aircraft by producing thrust. They work by drawing in air, compressing it, mixing it with fuel, and igniting the mixture. This process creates a high-speed exhaust that is expelled out the back, pushing the aircraft forward. There are different types of jet engines, including turbojets, turbofans, and turboprops. Each type has its own design and efficiency, making them suitable for various applications, from commercial airliners to military jets. Jet engines are essential for modern aviation, enabling fast and efficient travel across long distances.