Just like the Earth, Saturn powers a strong magnetic field. And just like the Earth's particles trapped in this magnetic field both emit radio waves as well as optical light (called aurora) when they enter the atmosphere. Saturn's radio emission as observed from Earth is pulsed due to its rotation, and it now turns out that its aurorae are pulsed with the same period and phase. Read more about it here.
Sunday, October 17, 2010
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