A Hall thruster glows blue

Psyche’s Hall Thruster

The photo on the left captures an operating electric Hall thruster identical to those that will propel NASA's Psyche spacecraft. The xenon plasma emits a blue glow as the thruster operates. The photo on the right shows a similar non-operating Hall thruster. The photo on the left was taken at NASA's Jet Propulsion Laboratory in Southern California; the photo on the right was taken at NASA's Glenn Research Center. Psyche's Hall thrusters will be the first to be used beyond lunar orbit, demonstrating that they could play a role in supporting future missions to deep space.

Credits: NASA/JPL-Caltech