Saturn's largest ring

  title={Saturn's largest ring},
  author={Anne J. Verbiscer and Michael F. Skrutskie and Douglas P. Hamilton},
Most planetary rings in the Solar System lie within a few radii of their host body, because at these distances gravitational accelerations inhibit satellite formation. The best known exceptions are Jupiter’s gossamer rings and Saturn’s E ring, broad sheets of dust that extend outward until they fade from view at five to ten planetary radii. Source satellites continuously supply the dust, which is subsequently lost in collisions or by radial transport. Here we report that Saturn has an enormous… Expand
An Evolving View of Saturn’s Dynamic Rings
The understanding of Saturn’s rings is reviewed after nearly 6 years of observations by the Cassini spacecraft and it remains unclear whether the vigorous evolutionary processes to which the rings are subject imply a much younger age than that of the solar system. Expand
Small particles dominate Saturn’s Phoebe ring to surprisingly large distances
Saturn’s faint outermost ring, discovered in 2009 (ref. 1), is probably formed by particles ejected from the distant moon Phoebe. The ring was detected between distances of 128 and 207 Saturn radiiExpand
Radial profiles of the Phoebe ring: A vast debris disk around Saturn
Abstract We present observations at optical wavelengths with the Cassini Spacecraft’s Imaging Science System of the Phoebe ring, a vast debris disk around Saturn that seems to be collisionallyExpand
Cassini-Huygens’ exploration of the Saturn system: 13 years of discovery
The Cassini-Huygens mission to Saturn provided a close-up study of the gas giant planet, as well as its rings, moons, and magnetosphere, and results show that Saturn's rings are substantially younger than the planet itself and constrain models of their origin. Expand
Satellite and Ring Systems
After having studied the Earth’s Moon in Chap. 8, we now look at the moons of the other planets of the solar system. A quick look at the two moons of Mars is followed by a detailed examination of theExpand
Searching for Saturn's Dust Swarm: Limits on the size distribution of Irregular Satellites from km to micron sizes
We describe a search for dust created in collisions between the Saturnian irregular satellites using archival Spitzer MIPS observations. Although we detected a degree scale Saturn-centric excess thatExpand
Direct imaging of irregular satellite discs in scattered light
Direct imaging surveys have found that long-period super-Jupiters are rare. By contrast, recent modeling of the widespread gaps in protoplanetary disks revealed by ALMA suggests an abundantExpand
Geophysical evolution of Saturn’s satellite Phoebe, a large planetesimal in the outer Solar System
Abstract Saturn’s satellite Phoebe is the best-characterized representative of large outer Solar System planetesimals, thanks to the close flyby by the Cassini spacecraft in June 2004. We explore theExpand
Dust and Snow Cover on Saturn's Icy Moons
The final analysis of the Cassini radar observations of Saturn's icy moons presented here shows that the exchange of material between the planet's dust rings and moons, which is specific to theExpand
The Irregular Satellites of Saturn Tilmann Denk
The outer or irregular moons of Saturn are a class of objects that is very distinct from the other satellites treated in this book. It not only has more objects (38 are presently known) than theExpand


The Asymmetric Time-Variable Rings of Mars
Abstract In this paper, we investigate the dynamics and steady-state behavior of the hypothetical circumplanetary dust rings associated with the two tiny satellites of Mars, Phobos and Deimos. TheseExpand
The sculpting of Jupiter’s gossamer rings by its shadow
Detailed modelling is presented that shows that the passage of ring particles through Jupiter’s shadow creates the Thebe extension and fully accounts for these Galileo results on dust impacts detected during the Galileo spacecraft's traversal of the outer ring region. Expand
The formation of Jupiter's faint rings
Observations by the Galileo spacecraft and the Keck telescope showed that Jupiter's outermost (gossamer) ring is actually two rings circumscribed by the orbits of the small satellites Amalthea and Thebe, suggesting that faint rings may accompany all small inner satellites of the other jovian planets. Expand
Compositional maps of Saturn's moon Phoebe from imaging spectroscopy
Imaging spectroscopy of Phoebe resulting from the Cassini–Huygens spacecraft encounter on 11 June 2004 mapped ferrous-iron-bearing minerals, bound water, trapped CO2, probable phyllosilicates, organics, nitriles and cyanide compounds, indicating a surface of cometary origin. Expand
Motion of dust in a planetary magnetosphere - Orbit-averaged equations for oblateness, electromagnetic, and radiation forces with application to Saturn's E ring
Abstract In this paper, we apply orbital perturbation theory to the circumplanetary motion of micrometer-sized dust grains subject to gravitational, electromagnetic, and radiation forces. We extendExpand
Orbital and Collisional Evolution of the Irregular Satellites
The irregular moons of the Jovian planets are a puzzling part of the solar system inventory. Unlike regular satellites, the irregular moons revolve around planets at large distances in tilted andExpand
Hydrocarbons on Saturn's satellites Iapetus and Phoebe
Material of low geometric albedo (pV⩽0.1pV⩽0.1) is found on many objects in the outer Solar System, but its distribution in the saturnian satellite system is of special interest because of itsExpand
The Contamination of Iapetus by Phoebe Dust
We examine whether the dark, orbitally-leading hemisphere of Saturn's satellite Iapetus might be coated by debris from low-albedo Phoebe, which orbits retrograde well exterior to Iapetus. UsingExpand
The Dark Side of Iapetus: Additional Evidence for an Exogenous Origin
The saturnian satellite Iapetus presents one of the most unusual appearances of any object in the Solar System: one hemisphere is about 10 times as bright as the other. The origin of the darkExpand
Spectrophotometry of the small satellites of Saturn and their relationship to Iapetus, Phoebe, and Hyperion
Abstract We have obtained broadband spectrophotometric observations of four of the recently discovered small satellites of Saturn (Gladman et al., 2001, Nature 412, 163–166). The new data enable anExpand