jan 292013
 
Io's Volcanism Controls Jupiter's Auroral Activity

  Jupiter’s volcanic moon Io spews out volcanic gas, which reaches its atmosphere and becomes ionized, forming what is known as the Io plasma torus. This plasma torus can interact with Jupiter’s magnetosphere, possibly affecting auroral activity there. This ultraviolet image of Jupiter was taken with the Hubble Space Telescope Imaging Spectrograph (STIS) on 26 [continue reading]