scholarly journals The Rings of Planets and Cosmogony of the Solar System

1979 ◽  
Vol 81 ◽  
pp. 203-203
Author(s):  
S. K. Vsekhsvyatskij
Keyword(s):  
Solar System ◽  
Giant Planets ◽  
Saturn’S Rings ◽  
Saturn's Rings

It is shown that the hypothesis that comets originate in the vicinity of each of the giant planets is consistent with the idea that these planets possess rings. It is suggested that the rings of Uranus, the probable gaseous ring around Jupiter and the clouds surrounding Io are rapidly evolving phenomena - the same may also even be true of Saturn's rings - which is to be expected of agglomerations of cometary meteoroids losing their icy constituents by sublimation.

scholarly journals The Formation of Disks by Inelastic Collisions of Gravitating Particles. Applications to the Formation of Galaxies

1974 ◽  
Vol 58 ◽  
pp. 173-179
Author(s):  
André Brahic
Keyword(s):  
Solar System ◽  
Equilibrium State ◽  
Numerical Study ◽  
Inelastic Collisions ◽  
Preliminary Results ◽  
Final Equilibrium State ◽  
Potential Applications ◽  
Saturn’S Rings ◽  
Saturn's Rings ◽  
Collision Mechanism

The numerical study of a gravitating system of colliding particles has many potential applications, for instance the formation of flat galaxies, the formation of the solar system and the evolution of Saturn's rings. Preliminary results are presented for the galactic case. The system tends towards a final equilibrium state and it seems that such a collision mechanism can flatten a protogalaxy.

Saturn's rings are solar system newcomers

Science ◽  
2017 ◽  
Vol 358 (6370) ◽  
pp. 1513-1514 ◽  
Author(s):  
Paul Voosen
Keyword(s):  
Solar System ◽  
Saturn’S Rings ◽  
Saturn's Rings

Gas giant planets, Saturn's rings, and Titan

2015 ◽  
pp. 320-339 ◽  
Author(s):  
Robert A. West ◽  
Padma A. Yanamandra-Fisher ◽  
Viktor Korokhin
Keyword(s):  
Giant Planets ◽  
Saturn’S Rings ◽  
Gas Giant ◽  
Saturn's Rings

scholarly journals Dynamics of Gravitating Systems of Colliding Particles in Planetary Discs

1979 ◽  
Vol 81 ◽  
pp. 197-202 ◽  
Author(s):  
André Brahic
Keyword(s):  
Solar System ◽  
Optical Depth ◽  
Interstellar Clouds ◽  
Gravitational Perturbations ◽  
Planets And Satellites ◽  
Saturn’S Rings ◽  
Gravitating Systems ◽  
Saturn's Rings ◽  
Solid Bodies ◽  
The Universe

During this symposium on the dynamics of the solar system, we have mainly studied the movements of the bodies of the solar system submitted to gravitational perturbations. The next step is to take into account the physical collisions. Indeed, there can be little doubt that collisions between “macroscopic bodies” are of frequent occurence in the Universe. All kinds of quite different objects undergo such collisions: these may range from large interstellar clouds to small solid bodies in the solar system. Collisions have surely played an important role in the formation of planets and satellites and continue to play a central role in the behaviour of the planetary discs. For example for Saturn's rings, one can see intuitively that until the optical depth drops much below unity, the rings are still evolving. Each orbiting particle can be taken as occupying a kind of torus, and collisions will continue until there is only one particle in each such “orbital tube”; this corresponds to a very small optical depth.

Saturn’s Rings

2021 ◽  
Author(s):  
Larry W. Esposito
Keyword(s):  
Giant Planets ◽  
Origin And Evolution ◽  
Ring Structures ◽  
Recent Origin ◽  
Aggregation And Disaggregation ◽  
Saturn’S Rings ◽  
The Individual ◽  
Saturn's Rings ◽  
Football Stadiums ◽  
Local Laboratory

Saturn’s rings are not only a beautiful and enduring symbol of space, but astronomers’ best local laboratory for studying phenomena in thin cosmic disks like those where planets formed. All the giant planets have ring systems. Saturn’s are the biggest and brightest. Saturn’s rings are made of innumerable icy particles, ranging from the size of dust to that of football stadiums. Galileo discovered Saturn’s rings with his newly invented telescope, but they were not explained until Huygens described them as thin, flat disks surrounding the planet. In the space age, rings were found around the other giant planets in our solar system. Rings have been seen around asteroids and likely exist around exoplanets. Many of the ring structures seen are created by gravity from Saturn’s moons. Rings show both ongoing aggregation and disaggregation. After decades of study from space and by theoretical analysis, some puzzles still remain unexplained. There is evidence for youthful rings from Cassini results, but no good theory to explain their recent origin. A future Saturn Ring Observer mission would be able to determine the direct connections between the individual ring physical properties and the origin and evolution of larger structures.

Comments on collision mechanics in ring systems

1984 ◽  
Vol 75 ◽  
pp. 407-422
Author(s):  
William K. Hartmann
Keyword(s):  
Asteroid Belt ◽  
Surface Erosion ◽  
Surface Layers ◽  
Ring Systems ◽  
Eclipse Observations ◽  
Saturn’S Rings ◽  
Saturn's Rings

ABSTRACTThe nature of collisions within ring systems is reviewed with emphasis on Saturn's rings. The particles may have coherent icy cores and less coherent granular or frosty surface layers, consistent with thermal eclipse observations. Present-day collisions of such ring particles do not cause catastrophic fragmentation of the particles, although some minor surface erosion and reaccretion is possible. Evolution by collisional fragmentation is thus not as important as in the asteroid belt.

Voyager UVS observations of stellar occultations by the rings of Saturn

1984 ◽  
Vol 75 ◽  
pp. 265-277
Author(s):  
J.B. Holbelg ◽  
W.T. Forrester
Keyword(s):  
Optical Depth ◽  
Distance Scale ◽  
Density Waves ◽  
Ring Density ◽  
Stellar Occultations ◽  
Saturn’S Rings ◽  
Saturn's Rings

ABSTRACTDuring the Voyager 1 and 2 Saturn encounters the ultraviolet spectrometers observed three separate stellar occultations by Saturn's rings. Together these three observations, which sampled the optical depth of the rings at resolutions from 3 to 6 km. can be used to establish a highly accurate distance scale allowing the identification of numerous ring features associated with resonances due to exterior satellites. Three separate observations of an eccentric ringlet near the location of the Titan apsidal resonance are discussed along with other ringlet-resonance associations occurring in the C ring. Density waves occurring in the A and B rings are reviewed and a detailed discussion of the analysis of one of these features is presented.

The Long View of Planetary Systems

2018 ◽  
Author(s):  
Karel Schrijver
Keyword(s):  
Solar System ◽  
Milky Way ◽  
Planetary Systems ◽  
Giant Planets ◽  
Milky Way Galaxy ◽  
Population Statistics ◽  
The Past ◽  
General Terms ◽  
The Galaxy ◽  
The Universe

How many planetary systems formed before our’s did, and how many will form after? How old is the average exoplanet in the Galaxy? When did the earliest planets start forming? How different are the ages of terrestrial and giant planets? And, ultimately, what will the fate be of our Solar System, of the Milky Way Galaxy, and of the Universe around us? We cannot know the fate of individual exoplanets with great certainty, but based on population statistics this chapter sketches the past, present, and future of exoworlds and of our Earth in general terms.

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