What is a rocket?

Rockets are vehicles, engines, or devices that obtain thrust by expelling matter (usually hot gases) at high speed from a nozzle. They are used for a variety of purposes, including launching spacecraft, satellites, and missiles. Rockets work based on Newton's Third Law of Motion: for every action, there is an equal and opposite reaction. This principle allows rockets to operate in the vacuum of space, where there is no air. They have played a critical role in space exploration and military technology.