We know why Jupiter (almost) has no rings!

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[EN VIDÉO] Saturn: the giant with ice and dust rings
Embark on a journey to meet the second largest planet in the Solar System: Saturn. A gas giant surrounded by many bright rings that will not leave anyone indifferent when observed. Get to know the world of Saturn, which has been extensively explored for 13 years by the Cassini probe.

It is available to astronomers, mathematicians and physicist Dutch Christian Huygens (1629-1695) to whom we owe the discovery of Saturn’s rings in 1655. In fact, they have been closely observed in astronomical telescopes since Galileo but no one until Huygens had clear observations that emphasized their nature and he also took from his interpretation of the existence of rings around Saturn a prediction that could be verified and that convinced his companions: observation of the edge of these rings in 1671.

Until the 1970s, only the rings of Saturn were known, but in 1979 the Voyager 1 probe revealed the rings of Jupiter. In 1989, the investigation Traveler 2 will make it possible to take a photo for the first time of the rings of Neptune whose existence was shown in 1984 thanks to the observation program ofhide onstar suggested by André Brahic and his colleagues, Bruno Sicardy and Françoise Roques from the Paris-Meudon Observatory, and produced by Patrice Bouchet, Reinhold Häfner and Jean Manfroid of the La Silla Observatory (ESO).

In 1995, in the program Cassiopée, André Brahic and his collaborator Cécile Ferrari told us about the discovery of the rings of the planets of the Solar System. © Jean-Pierre Luminet

In fact, rings aroundUranus discovered by chance on March 10, 1977 by James L. Elliot, Edward W. Dunham and Douglas J. Mink from observations made using Gerard P. Kuiper Airborne Observatory (KAO; in French “Gerard P. Kuiper Airborne Observatory”) which is a project of in to develop astronomical research infrared.

The Tensile Jovian Rings Are Constantly Fed by Dust

But back to Jupiter’s rings. The Jovian ring system is weak and mostly composed of dust and not ice unlike Saturn and these factors explain why it took so long to be discovered. It is divided into several rings: the halo, the main ring and the Gossamer rings. In particular, it is studied using telescope Hubble and probes Galileo and Juno.

We still don’t know the origin of Saturn’s rings, nor when they date. This is an open research topic, and symmetrical, we wonder why Jupiter, which is bigger and bigger than Saturn, does not have a comparable ring system. To them astronomers from UC Riverside in the USA filed at arXiv an article in which they propose an answer to this enigma.

In a statement from the University, one of the authors of the article, Stephen Kaneexplain that that [l]It has long been argued that Jupiter does not have the most impressive rings to put Saturn to shame. If they are with Jupiter, they will be brighter than ours, because the planet is closer than Saturn. “. This leads the researcher to wonder if Jupiter did not have rings before, rings that disappeared due to the instability specific to celestial mechanics with gravitational disturbances, water force and his resonances gravitational.

the computers modern and the refinements of the simulations of the consequences of the laws ofastrophysics which they allowed Stephen Kane and his doctoral student Zhexing Li to exploit to know for sure. So the two men are looking for the effects that the four months trees of jupiter, IoEurope, Ganymede and Callisto of the rings around Jupiter.

The results won’t be long in coming, as Kane explained again in a press release: We discovered the Galilean moons of Jupiter, one of which is the largest moon of ours. solar systemvery quickly destroys any large rings that form “.

The rings of Jupiter that we know are therefore for this reason very small and it is believed that they are often dusted by micrometeorite collisions with other small moons of Jupiter, such as Thebes, Amalthea and especially Adrastea and Metis.

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