After eight years, NASA's Dawn probe brings Ceres into closest focus - The Register

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After eight years, NASA's Dawn probe brings Ceres into closest focus The Register With electrical power from Dawn's large solar panels, the xenon is given an electrical charge in a process called ionisation. The engines use high voltage to accelerate the ions. They're then shot out of the engines at up to 90,000mph. When the ions ... and more »

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