Rocket
Rocket engine exhaust is formed entirely from propellant carried within the rocket before use.[2] Rocket engines work by action and reaction and push rockets forward simply by expelling their exhaust in the opposite direction
interplanetary and industrial use did not occur until the 20th century, when rocketry was the enabling technology for the Space Age, including setting foot on the Earth's moon.
The stored propellant can be a simple pressurized gas or a single liquid fuel that disassociates in the presence of a catalyst (monopropellants), two liquids that spontaneously react on contact (hypergolic propellants), two liquids that must be ignited to react, a solid combination of fuel with oxidizer
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