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energetic Neutral Atom Charge Exchange
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energetic Neutral Atom Charge Exchange

January 9, 2013
From its vantage far above Earth's relatively bright magnetosphere, the spacecraft's energetic neutral atom (ENA) sensors will assemble global images that reveal the broad heliospheric interactions for the first time. These ENAs are produced by a process called "charge exchange," which neutralizes previously charged particles in the interactive region within the interstellar medium. Once neutralized, some ENAs travel inward toward the Sun where they can be observed by the spacecraft. Credit: Southwest Research Institute