A mass driver is a type of electromagnetic launcher that propels objects at high speeds using magnetic fields. It works by accelerating a payload along a track, typically using a series of coils that create a moving magnetic field. This technology is often considered for launching materials into space, as it can reduce the need for traditional rocket fuel. Mass drivers can be used for various applications, including sending payloads to low Earth orbit or transporting materials on planetary surfaces. They are part of ongoing research in fields like space exploration and advanced propulsion systems, aiming to make space travel more efficient and cost-effective.