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Simulated Van Allen Belts

Model of Earth in large rose colored room with radiation simulation arcs, and technician looking through window
In this 1966 photo, a plasma thruster at NASA's Lewis Research Center simulates Van Allen Belts, rings of radiation around the Earth. The Cleveland, Ohio, center is now John H. Glenn Research Center.

In this 1966 photo, a plasma thruster at NASA’s Lewis Research Center simulates Van Allen Belts, rings of radiation around the Earth. The Cleveland, Ohio, center is now John H. Glenn Research Center.Image Credit: NASA