Jupiter's magnetosphere

Jupiter

. High-speed electrons that are trapped in the Jovian 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 Cassini measures energetic atoms (bottom) created when fast-moving ions within the magnetosphere pick up electrons to become neutral atoms. The two open circles denote Io's orbital position on each side of the planet; Jupiter is denoted by the central black disk. [Courtesy of Imke de Pater, University of California at Berkeley (top) and NASA, JPL, and the Johns Hopkins University Applied Physics Laboratory (bottom).]

Copyright 2010, Professor Kenneth R. Lang, Tufts University