Can anyone believe that a rocket booster of bacteria size. Yes it is possible as it was designed by Brian Gilchrist. He designed an engine of a size of single bacterium. For thrust it relies on the equivalent of chucking microscopic beer cans out of the spacecraft's rear window. He proposes to harness the latest nanotechnology to create an engine that will make its way across the solar system by firing out minute metal particles like so much nano-sized grapeshot.
It will take more than just one of these nanoscale motors to drive a spacecraft; Gilchrist envisages arrays of many millions of them being bolted onto a space vehicle. Even then they will not have nearly enough oomph to launch a craft into orbit. Yet once up in space Gilchrist's "nanoparticle field emission thrusters", or nanoFETs will function to move in the orbit
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