Photonic propulsion could get a 100 kg object to Mars in 3 days—a spaceship in a month—and we already have the technology to build it, scientists say.
Scientists from the University of California, Santa Barbara, are proposing a road map to building laser arrays in orbit capable of launching probes to nearest star systems and spacecraft-sized loads to our nearest planets.
There is no known reason why we cannot do this, except for NASA budget reasons.
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