## Jupiter's magnetosphere

Fig. 3.17 . High-speed electrons that are trapped in Jupiter’s magnetosphere emit steady radio radiation (top) by the synchrotron process; it is detected by ground-based radio telescopes such as the Very Large Array. An instrument aboard the Cassini spacecraft measured energetic atoms (bottom) created when fast-moving ions within the magnetosphere picked up electrons to become neutral atoms. The two open circles denote Io's orbital position on each side of the planet; the central black disk denotes Jupiter. [Courtesy of Imke de Pater, U. C. Berkeley (top) and NASA/JPL/JHUAPL (bottom).]

Copyright 2010, Professor Kenneth R. Lang, Tufts University