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Saturn's quasi-periodic planet-encircling storms are the largest convecting outbursts in the Solar System. The last eruption was in 1990. A new eruption started in December 2010 and presented the first-ever opportunity to observe such…

On June 12, 2007 the Cassini probe sent the images of a small moon of Saturn called Atlas which is located between the ring A and the small ring R/2004 S 1. These images have shown that the Atlas morphology is very different from other…

天体物理学 · 物理学 2007-08-14 Enrique Ordaz Romay

Saturn's B ring is the most opaque ring in our solar system, but many of its fundamental parameters, including its total mass, are not well constrained. Spiral density waves generated by mean-motion resonances with Saturn's moons provide…

地球与行星天体物理 · 物理学 2016-08-31 M. M. Hedman , P. D. Nicholson

Since 2004, observations of Saturn's F ring have revealed that the ring's core is surrounded by structures with radial scales of hundreds of kilometers, called "spirals" and "jets". Gravitational scattering by nearby moons was suggested as…

地球与行星天体物理 · 物理学 2009-11-13 Sebastien Charnoz

JWST measured the infrared spectra of Saturn's rings and several of its small moons (Epimetheus, Pandora, Telesto and Pallene) as part of Guaranteed Time Observation program 1247. The NIRSpec instrument obtained near-infrared spectra of the…

We explore whether hyperbolic diffusion may help explain sharp edges in the gaps in Saturn's rings. Sharp edges are conventionally understood to be due to angular momentum flux reversal at gap edges. We do not dispute this finding, but…

地球与行星天体物理 · 物理学 2025-03-06 Peter Todd Williams

Images obtained by the Cassini spacecraft of the region just beyond Saturn's main rings reveal a previously unreported narrow and dusty ringlet that has dynamical connections with both Saturn's small satellite Prometheus and the F ring. The…

地球与行星天体物理 · 物理学 2016-10-12 M. M. Hedman , B. J. Carter

The incredible longevity of Cassini's orbital mission at Saturn has provided the most comprehensive exploration of a seasonal giant planet to date. This review explores Saturn's changing global temperatures, composition, and aerosol…

地球与行星天体物理 · 物理学 2023-05-09 L. N. Fletcher , L. Sromovsky , V. Hue , J. I. Moses , S. Guerlet , R. A. West , T. Koskinen

The Cassini spacecraft revealed the spectacular, highly irregular shapes of the small inner moons of Saturn, ranging from the unique "ravioli-like" forms of Pan and Atlas to the highly elongated structure of Prometheus. Closest to Saturn,…

地球与行星天体物理 · 物理学 2018-05-23 Adrien Leleu , Martin Jutzi , Martin Rubin

Exploratory missions have found that regolith on interplanetary bodies can be loosely packed and freely flowing, a state that strongly affects mission plans and that may also influence the large scale shapes of these bodies. We investigate…

地球与行星天体物理 · 物理学 2024-05-14 Troy Shinbrot

Recent observations have revealed evidence for the global oscillations of Jupiter and Saturn, which can potentially provide a new window into the interior structure of giant planets. Motivated by these observations, we study the non-radial…

地球与行星天体物理 · 物理学 2015-04-30 Jim Fuller , Dong Lai , Natalia I. Storch

We analyze data retrieved by the Imaging Science System onboard the Cassini spacecraft to study the horizontal velocity and vorticity fields of Saturn's Polar Regions (latitudes 60-90$^\circ$N in June-December 2013 and 60-90$^\circ$S in…

地球与行星天体物理 · 物理学 2024-02-13 A. Antuñano , T. del Río-Gaztelurrutia , A. Sánchez-Lavega , R. Hueso

We investigate the long-term motion of Saturn's North-Pole Hexagon and the structure of its associated eastward jet, using Cassini ISS and ground-based images from 2008 to 2014. We show that both are persistent features that have survived…

The gravity field of a giant planet is typically our best window into its interior structure and composition. Through comparison of a model planet's calculated gravitational potential with the observed potential, inferences can be made…

地球与行星天体物理 · 物理学 2020-03-18 Naor Movshovitz , Jonathan J. Fortney , Chris Mankovich , Daniel Thorngren , Ravit Helled

The Cassini spacecraft discovered many close-in small satellites in Saturnian system, and several of them exhibit exotic orbital states due to interactions with Mimas and the oblateness of the planet. This work is devoted to Methone, which…

地球与行星天体物理 · 物理学 2022-03-30 Nelson Callegari , Adrián Rodríguez , Demétrio Tadeu Ceccatto

During the thirteen years in orbit around Saturn before its final plunge, the Cassini spacecraft provided more than ten thousand astrometric measurements. Such large amounts of accurate data enable the search for extremely faint signals in…

地球与行星天体物理 · 物理学 2019-03-11 Valéry Lainey , Benoît Noyelles , Nicholas Cooper , Carl Murray , Ryan Park , Nicolas Rambaux

We investigate whether rings around extrasolar planets could be detected from those planets' transit lightcurves. To this end we develop a basic theoretical framework for calculating and interpreting the lightcurves of ringed planet…

天体物理学 · 物理学 2009-11-10 Jason W. Barnes , Jonathan J. Fortney

The Cassini mission provided key measurements needed to determine the absolute age of Saturn's rings, including the extrinsic micrometeoroid flux at Saturn, the volume fraction of non-icy pollutants in the rings, and the total ring mass.…

地球与行星天体物理 · 物理学 2023-05-24 R. H. Durisen , Paul. R. Estrada

We conduct an in-depth analysis of statistical flow properties calculated from the reference high-resolution Saturn simulation obtained by global climate modelling in Part II. In the steady state of this reference simulation, strongly…

地球与行星天体物理 · 物理学 2020-01-09 Simon , Cabanes , Aymeric , Spiga , Roland , M. B. Young

Density waves in Saturn's rings are usually tightly wrapped spiral patterns generated by resonances with either Saturn's moons or structures inside the planet. However, between the Barnard and Bessel Gaps in the Cassini Division (i.e.…

地球与行星天体物理 · 物理学 2019-02-27 M. M. Hedman , P. D. Nicholson