PerspectivePlanetary Science

A New Spin on Saturn's Rotation

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Science  20 Apr 2007:
Vol. 316, Issue 5823, pp. 380-381
DOI: 10.1126/science.1142329

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Modulations of radio emissions from Saturn that have been used to measure the rotation of the planet's interior now turn out to be caused by an external ring of plasma. The true internal rotation continues to be a mystery.