Rocket propulsion refers to the action or process by which rockets are propelled forward through the expulsion of high-speed exhaust gases from their engines.
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Thrust: The force produced by a rocket engine that propels it forward.
Specific Impulse: A measure of how efficiently a rocket engine uses its propellant. It indicates how much thrust can be generated per unit mass flow rate.
Escape Velocity: The minimum velocity an object must reach to escape the gravitational pull of another celestial body, such as Earth.