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Saturn is ringing weakly. Exquisite data from the Cassini mission reveal the presence of f-mode oscillations as they excite density waves in Saturn's rings. These oscillations have displacement amplitudes of order a metre on Saturn's…

Earth and Planetary Astrophysics · Physics 2019-09-04 Yanqin Wu , Yoram Lithwick

We provide measurements of the absolute reflectivity of Jupiter and Saturn along their central meridians in filters covering a wide range of visible and near-infrared wavelengths (from 0.38 to 1.7 $\mu$m) that are not often presented in the…

Earth and Planetary Astrophysics · Physics 2017-09-29 I. Mendikoa , A. Sánchez-Lavega , S. Pérez-Hoyos , R. Hueso , J. F. Rojas , J. López-Santiago

The alignment of Saturn's magnetic pole with its rotation axis precludes the use of magnetic field measurements to determine its rotation period. The period was previously determined from radio measurements by the Voyager spacecraft to be…

Earth and Planetary Astrophysics · Physics 2015-06-24 Ravit Helled , Eli Galanti , Yohai Kaspi

We predict how a remote observer would see the brightness variations of giant planets similar to Jupiter and Saturn as they orbit their central stars. We model the geometry of Jupiter, Saturn and Saturn's rings for varying orbital and…

In June 2015, Cassini high-resolution images of Saturn's limb southwards of the planet's hexagonal wave revealed a system of at least six stacked haze layers above the upper cloud deck. Here, we characterize those haze layers and discuss…

Saturn's Great Storm of 2010 - 2011 produced a planet-encircling wake that slowly transitioned from a region that was mainly dark at 5 microns in February 2011 to a region that was almost entirely bright and remarkably uniform by December…

Earth and Planetary Astrophysics · Physics 2016-11-14 L. A. Sromovsky , K. H. Baines , P. M. Fry , T. W. Momary

In this paper we present a study of the vertical haze and cloud structure over a triple vortex in Saturn's atmosphere in the planetographic latitude range 55N-69N (del Rio- Gaztelurrutia et al. , 2018) using HST/WFC3 multispectral imaging.…

Earth and Planetary Astrophysics · Physics 2019-06-04 J. F. Sanz-Requena , S. Perez-Hoyos , A. Sanchez-Lavega , T. del Rio-Gaztelurrutia , P. G. J. Irwin

We use a simple model of the dynamics of a narrow-eccentric ring, to put some constraints on some of the observable properties of the real systems.In this work we concentrate on the case of the `Titan ringlet of Saturn'.Our approach is…

Astrophysics · Physics 2009-11-10 M. D. Melita , J. C. B. Papaloizou

The Voyager 2 Radio Science Subsystem occultations of the Uranian alpha and beta rings exhibit quasi-periodic optical depth variations with radial wavelengths that vary with longitude. These patterns may be wakes from small moonlets…

Earth and Planetary Astrophysics · Physics 2016-12-06 R. O. Chancia , M. M. Hedman

Our knowledge of Saturns neutral thermosphere is far superior to that of the other giant planets due to Cassini Ultraviolet Imaging Spectrograph (UVIS) observations of 15 solar occultations and 26 stellar occultations analyzed to date.…

Earth and Planetary Astrophysics · Physics 2016-10-26 Darrell F. Strobel , Tommi Koskinen , Ingo Mueller-Wodarg

We present an analytical model to study the dynamics of the outer edge of Saturn's A ring. The latter is influenced by 7:6 mean motion resonances with Janus and Epimetheus. Because of the horseshoe motion of the two co-orbital moons, the…

Earth and Planetary Astrophysics · Physics 2019-07-17 N. C. S. Araujo , S. Renner , N. J. Cooper , M. El Moutamid , C. D. Murray , B. Sicardy , E. Vieira Neto

Saturn's moon Iapetus, which is in synchronous rotation, is covered by an optically dark material mainly on its leading side, while its trailing side is significantly brighter. Because longer wavelengths probe deeper into the subsurface,…

During the Grand Finale stage of the Cassini mission, organic-rich ring material was discovered to be flowing into Saturn's equatorial upper atmosphere at a surprisingly large rate. Through a series of photochemical models, we have examined…

The Lagrange planetary equations are used to study to secular evolution of a small, eccentric satellite that orbits within a narrow gap in a broad, self-gravitating planetary ring. These equations show that the satellite's secular…

Astrophysics · Physics 2009-11-13 Joseph M. Hahn

Many small moonlets, creating propeller structures, have been found in Saturn's rings by the Cassini spacecraft. We study the dynamical evolution of such 20-50m sized bodies which are embedded in Saturn's rings. We estimate the importance…

Earth and Planetary Astrophysics · Physics 2010-11-23 Hanno Rein , John C. B. Papaloizou

The origin and evolution of Saturn's rings is critical to understanding the Saturnian system as a whole. Here, we discuss the physical and chemical composition of the rings, as a foundation for evolutionary models described in subsequent…

We analyze data from the final two years of the Cassini mission to retrieve the distributions of methane, ethane, acetylene, ethylene, and benzene in Saturn's upper stratosphere and mesosphere from stellar occultations observed by the…

Earth and Planetary Astrophysics · Physics 2024-05-06 Zarah L. Brown , Tommi T. Koskinen , Julianne I. Moses , Sandrine Guerlet

The zeta ring is the innermost component of the Uranian ring system. It is of scientific interest because its morphology changed significantly between the Voyager 2 encounter in 1986 and subsequent Earth-based observations around 2007. It…

Earth and Planetary Astrophysics · Physics 2023-06-09 M. M. Hedman , I. Regan , T. Becker , S. M. Brooks , I. de Pater , M. Showalter

Recently, a discussion about the effects of the anisotropy in the spatial density of Dark Matter in the Solar neighbourhood due to the motion of the Sun through the Galactic halo on the orbital motion of the solar system's planets and their…

General Relativity and Quantum Cosmology · Physics 2019-09-11 Lorenzo Iorio

Saturn's rings, reminiscent of an early Solar System present a unique opportunity to investigate experimentally some mechanisms thought to be responsible for planet and planetesimal formation in protoplanetary discs. Here we extended the…

Earth and Planetary Astrophysics · Physics 2015-06-18 Phil J Sutton , Feo Kusmartsev
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