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Keeping Up with Juno

12 Dec 2017, 17:25 UTC
Keeping Up with Juno NASA/JPL-Caltech/SwRI/JHUAPL
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We’re getting interesting results from analysis of Juno’s close flybys of Jupiter. The spacecraft has detected hydrogen, oxygen and sulfur ions moving at relativistic speeds in a new radiation zone just outside the atmosphere. We have its JEDI (Jupiter Energetic Particle Detector Instrument) to thank for the detection, which was made during approaches as close as 3400 kilometers from the cloud tops. Fast moving atoms without an electric charge — energetic neutral atoms — are thought to be the source of the new radiation zone as they move from gas around Io and Europa and become ionized in Jupiter’s upper atmosphere.

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