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