http://www.cnn.com/2003/TECH/space/0...nch/index.html
Ion drive
On its way to the moon SMART's primary objective is to test an innovative propulsion system known as an ion drive.
The system uses solar power to produce a beam of charged xenon atoms, or ions, which are expelled from the back of the probe producing thrust that drives the spacecraft forward.
Ion drive
On its way to the moon SMART's primary objective is to test an innovative propulsion system known as an ion drive.
The system uses solar power to produce a beam of charged xenon atoms, or ions, which are expelled from the back of the probe producing thrust that drives the spacecraft forward.

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