<P> Cassini observed a series of cloud features nicknamed "String of Pearls" found in northern latitudes . These features are cloud clearings that reside in deeper cloud layers . </P> <P> Saturn has an intrinsic magnetic field that has a simple, symmetric shape--a magnetic dipole . Its strength at the equator--0.2 gauss (20 μT)--is approximately one twentieth of that of the field around Jupiter and slightly weaker than Earth's magnetic field . As a result, Saturn's magnetosphere is much smaller than Jupiter's . When Voyager 2 entered the magnetosphere, the solar wind pressure was high and the magnetosphere extended only 19 Saturn radii, or 1.1 million km (712,000 mi), although it enlarged within several hours, and remained so for about three days . Most probably, the magnetic field is generated similarly to that of Jupiter--by currents in the liquid metallic - hydrogen layer called a metallic - hydrogen dynamo . This magnetosphere is efficient at deflecting the solar wind particles from the Sun . The moon Titan orbits within the outer part of Saturn's magnetosphere and contributes plasma from the ionized particles in Titan's outer atmosphere . Saturn's magnetosphere, like Earth's, produces aurorae . </P> <P> The average distance between Saturn and the Sun is over 1.4 billion kilometers (9 AU). With an average orbital speed of 9.68 km / s, it takes Saturn 10,759 Earth days (or about ​ 29 ⁄ years) to finish one revolution around the Sun . As a consequence, it forms a near 5: 2 mean - motion resonance with Jupiter . The elliptical orbit of Saturn is inclined 2.48 ° relative to the orbital plane of the Earth . The perihelion and aphelion distances are, respectively, 9.195 and 9.957 AU, on average . The visible features on Saturn rotate at different rates depending on latitude and multiple rotation periods have been assigned to various regions (as in Jupiter's case). </P> <P> Astronomers use three different systems for specifying the rotation rate of Saturn . System I has a period of 10 hr 14 min 00 sec (844.3 ° / d) and encompasses the Equatorial Zone, the South Equatorial Belt and the North Equatorial Belt . The polar regions are considered to have rotation rates similar to System I . All other Saturnian latitudes, excluding the north and south polar regions, are indicated as System II and have been assigned a rotation period of 10 hr 38 min 25.4 sec (810.76 ° / d). System III refers to Saturn's internal rotation rate . Based on radio emissions from the planet detected by Voyager 1 and Voyager 2, System III has a rotation period of 10 hr 39 min 22.4 sec (810.8 ° / d). System III has largely superseded System II . </P>

What is the length of year on saturn