New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring

  title={New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring},
  author={Imke de Pater and Heidi B. Hammel and Seran G. Gibbard and Mark R. Showalter},
  pages={92 - 94}
We compared near-infrared observations of the recently discovered outer rings of Uranus with Hubble Space Telescope results. We find that the inner ring, R/2003 U 2, is red, whereas the outer ring, R/2003 U 1, is very blue. Blue is an unusual color for rings; Saturn's enigmatic E ring is the only other known example. By analogy to the E ring, R/2003 U 1 is probably produced by impacts into the embedded moon Mab, which apparently orbits at a location where nongravitational perturbations favor… 
The Dark Side of the Rings of Uranus
It is concluded that the dust distribution within the rings of Uranus has changed substantially since the 1986 Voyager encounter and that it occurs on much larger scales than has been seen in other planetary systems.
Planetary Rings
Planetary rings are the only nearby astrophysical disks, and the only disks that have been investigated by spacecraft (especially the Cassini spacecraft orbiting Saturn). Although there are
Orbital evolution of the μ and ν dust ring particles of Uranus
The μ and ν rings of Uranus form a secondary ring-moon system with the satellites Puck, Mab, Portia, and Rosalind. These rings are tenuous and dominated by micrometric particles, which can be
The rings and small moons of Uranus and Neptune
  • M. Showalter
  • Physics, Geology
    Philosophical Transactions of the Royal Society A
  • 2020
These systems are studied for the information they reveal about the properties, history and ongoing evolution of the planetary systems of which they are a part; as dynamical analogues for other astrophysical systems such as protoplanetary disks; and for the wealth of fascinating properties and origin scenarios that make them worthy of study in their own right.
Origin and Evolution of Saturn's Ring System
The origin and long-term evolution of Saturn's rings is still an unsolved problem in modern planetary science. In this chapter we review the current state of our knowledge on this long-standing
The New Class of Dusty DAZ White Dwarfs
Our mid-infrared survey of 124 white dwarfs with the Spitzer Space Telescope and the IRAC imager has revealed an infrared excess associated with the white dwarf WD 2115-560 naturally explained by
Circumplanetary Dust Populations
We summarize the current state of observations of circumplanetary dust populations, including both dilute and dense rings and tori around the giant planets, ejecta clouds engulfing airless moons, and


The Second Ring-Moon System of Uranus: Discovery and Dynamics
Deep exposures of Uranus taken with the Hubble Space Telescope reveal two small moons and two faint rings that constitute a densely packed, rapidly varying, and possibly unstable dynamical system.
Seeing Ghosts: Photometry of Saturn's G Ring
Abstract Saturn's faint and narrow G Ring is only visible to the eye in two Voyager images, each taken at a rather high solar phase angle of ∼160°. In this paper we introduce a new photometric
Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope
Abstract Photometric properties of 4 rings and 16 satellites of Uranus are presented, based on 41 Hubble Space Telescope images taken in 1997. Up to 25 filters per object covered the wavelength range
G Ring Particle Sizes Derived from Ring Plane Crossing Observations
Abstract The Saturn ring plane crossings in 1995–1996 allowed observers using the Hubble Space Telescope and the W. M. Keck telescope to image the planet's diffuse rings from 0.3 to 2.2 μm at a
Saturn's Magnetosphere, Rings, and Inner Satellites
Our 31 August to 5 September 1979 observations together with those of the other Pioneer 11 investigators provide the first credible discovery of the magnetosphere of Saturn and many detailed