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Science 20 April 2007:
Vol. 316. no. 5823, pp. 380 - 381
DOI: 10.1126/science.1142329
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Perspectives

PLANETARY SCIENCE:
A New Spin on Saturn's Rotation

Fran Bagenal

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.

The author is at the University of Colorado, Boulder, CO 80309-0392, USA. E-mail: bagenal{at}colorado.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)