Propellant
Propellant is a material that is used to create thrust in rockets or other spacecraft. It is a substance that is expelled from the spacecraft in one direction, creating a reaction force in the opposite direction that propels the spacecraft forward. Propellants can be either liquid or solid, and they are typically made up of a fuel and an oxidizer. The fuel provides the energy, while the oxidizer provides the oxygen needed for combustion. The choice of propellant depends on a number of factors, including the mission requirements, the size and weight of the spacecraft, and the desired performance characteristics. Propellants are a critical component of space and astronautical engineering, as they are essential for launching and maneuvering spacecraft.
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