CLEVELAND — A small robotic surveyor arrives to explore a near-Earth asteroid. Another robotic spacecraft is returning to Earth with a pristine comet surface sample. Meanwhile, a robotic explorer is ...

mileage on the engine increases. That wisdom does not hold true for NASA’s ion engine, whose odometer continues to spin to the delight of its owners. This little engine that could has more than made ...

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Over the last several months, we’ve been enjoying a front-row seat as [Jay Bowles] of Plasma Channel has been developing and perfecting his design for a high voltage multi-stage ionic thruster. With ...