In contrast to the Space Elevator concept, in which high-power continuous-wave lasers beam light to photovoltaic cells attached to a vehicle that rides into space on a cable at relatively slow 5 m/s speeds, beamed-energy propulsion (BEP) focuses a megawatt-level peak-power laser on a propellant onboard a next-generation nano-satellite launcher to boost a kilogram of payload into low-Earth orbit.
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