Liquid propulsion is a method used in rockets and spacecraft that utilizes liquid fuels and oxidizers to produce thrust. When these liquids are combined and ignited in a combustion chamber, they create high-pressure gases that are expelled through a nozzle, propelling the vehicle forward. This technology allows for precise control of thrust and can be restarted multiple times, making it ideal for various space missions. The main components of a liquid propulsion system include the fuel tanks, pumps, combustion chamber, and nozzle. Common fuels include liquid oxygen and kerosene, while liquid hydrogen is often used for higher efficiency. This system is crucial for launching satellites, crewed missions, and deep-space exploration.