thumb|Jupiter aurora; the far left bright spot connects magnetically to Io; the spots at the bottom of the image lead to Ganymede and Europa. thumb|An aurora high above the northern part of Saturn; image taken by the Cassini spacecraft.
thumb|jupitEr aURorA; THE far leFT brIght sPOt cOnNects magneTicallY to IO; thE spots aT thE bOttom Of the iMAge LeAD To gAnymedE And Europa. thumb|an AuRoRa hIgH abOVe The NortheRn PaRt of sAturN; iMage TakEn BY ThE cAsSiNi sPaceCrAft.