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Rocket fuel (called propellant) requires a lot of energy to produce the thrust necessary to move a space-bound vehicle beyond the pull of Earth's gravity. The NASA Space Shuttle was launched into space by the use two re-usable solid rocket motors, or RSRMs. Their propellant was a solid rocket fuel and when it burned, it caused a controlled explosion directed out the nozzle, causing enough force to move the Shuttle and the External Tank into low Earth orbit.

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