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Spacecraft Propulsion

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Electric Propulsion

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Relies on electric power to change the velocity of a spacecraft. Example: Hall-effect thrusters used on communication satellites.

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Solar Sail

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Uses the pressure from solar photons to produce thrust. Example: IKAROS, by JAXA.

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Variable Specific Impulse Magnetoplasma Rocket (VASIMR)

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Uses magnetic fields to heat and expel plasma, adjustable specific impulse. Example: Proposed for future Mars missions.

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Air-Breathing Electric Thruster

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Collects ambient air as propellant and uses electric energy for ionization and thrust. Example: Proposed for low Earth orbit satellites.

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Pulse Detonation Engine

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Relies on detonations of a fuel mixture to produce thrust. Example: Experimental, not yet used for active spacecraft propulsion.

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Nuclear Electric Propulsion

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Combines a nuclear reactor with electric propulsion such as ion thrusters. Example: Conceptual designs for future deep space exploration.

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Electrothermal Thruster

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Accelerates propellant by thermal energy, which can be electrically powered. Example: Arcjet thrusters on spacecraft.

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Nuclear Thermal Propulsion

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Heats a propellant using a nuclear reactor to create thrust. Example: Project NERVA (never flown).

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Magnetoplasmadynamic Thruster (MPD)

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Uses the Lorentz force to accelerate plasma for propulsion. Example: Used mainly in theoretical studies and experimental models.

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Cold Gas Thruster

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Employs a pressurized inert gas that is expelled to produce thrust. Example: Maneuvering thrusters on satellites.

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Pulsed Plasma Thruster

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Uses quick bursts of plasma to create thrust. Example: Ejection of Teflon plasma on CubeSats.

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Hybrid Rocket Engine

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Combines solid fuel with liquid or gas oxidizer for thrust. Example: SpaceShipTwo by Virgin Galactic.

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Resistojet Rocket

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Heats a non-reactive fluid to expel it for thrust. Example: Satellite propulsion for altitude adjustments.

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Chemical Propulsion

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Uses the reaction of chemical propellants to produce thrust. Example: Saturn V rocket.

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Ion Thruster

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Uses electric fields to accelerate ions to produce thrust. Example: NASA's Dawn spacecraft.

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