Solar Thermal Propulsion
Solar Thermal Propulsion (STP) is a type of propulsion system that uses the energy from the sun to heat a propellant, typically hydrogen, to produce thrust. The system works by using a parabolic mirror to focus sunlight onto a heat exchanger, which then heats the propellant. The heated propellant is then expelled out of a nozzle to produce thrust. STP has the potential to provide a high specific impulse, which is a measure of the efficiency of a rocket engine, and could potentially reduce the cost of space travel by reducing the amount of propellant needed. However, STP is still in the experimental stage and faces several technical challenges, such as the need for lightweight and durable materials that can withstand high temperatures and the need for efficient heat exchangers.
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