a gas turbine produces a stream of hot gas that propels a jet plane by reaction propulsion

any vehicle self-propelled by a rocket engine

the first stage of a multistage rocket

a rocket engine in which a nuclear reactor is used to heat a propellant

a small rocket engine on a larger rocket or spacecraft that is fired to slow or alter its course

a rocket powerful enough to travel into outer space

a small rocket engine that provides the thrust needed to maneuver a spacecraft

any vehicle self-propelled by a rocket engine