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Remote sensing observations suffer significant limitations when used to study the bulk atmospheric composition of the giant planets of our solar system. This impacts our knowledge of the formation of these planets and the physics of their…

The determination of Saturn's atmospheric noble gas abundances are critical to understanding the formation and evolution of Saturn, and giant planets in general. These measurements can only be performed with an entry probe. A Saturn probe…

For its beautiful rings, active atmosphere and mysterious magnetic field, Saturn is a fascinating planet. It also holds some of the keys to understanding the formation of our Solar System and the evolution of giant planets in general. While…

Earth and Planetary Astrophysics · Physics 2015-05-14 Tristan Guillot , Sushil Atreya , Sébastien Charnoz , Michele K. Dougherty , Peter Read

Probing the interiors of the gas giant planets in our Solar System is not an easy task. It requires a set of accurate measurements combined with theoretical models that are used to infer the planetary composition and its depth dependence.…

Earth and Planetary Astrophysics · Physics 2018-12-19 Ravit Helled

The wealth of observational data about Jupiter and Saturn provides strong constraints to guide our understanding of the formation of giant planets. The size of the core and the total amount of heavy elements in the envelope have been…

Astrophysics · Physics 2009-11-11 Yann Alibert , Olivier Mousis , Christoph Mordasini , Willy Benz

The ice giants Uranus and Neptune are the least understood class of planets in our solar system but the most frequently observed type of exoplanets. Presumed to have a small rocky core, a deep interior comprising ~70% heavy elements…

The recent derivation of a lower limit for the $^{14}$N/$^{15}$N ratio in Saturn's ammonia, which is found to be consistent with the Jovian value, prompted us to revise models of Saturn's formation using as constraints the supersolar…

Earth and Planetary Astrophysics · Physics 2015-06-23 Olivier Mousis , Jonathan I. Lunine , Leigh N. Fletcher , Kathleen E. Mandt , Mohamad Ali-Dib , Daniel Gautier , Sushil Atreya

We present the first models of Jupiter and Saturn to couple their evolution to both a radiative-atmosphere grid and to high-pressure phase diagrams of hydrogen with helium and other admixtures. We find that prior calculated phase diagrams…

Astrophysics · Physics 2009-11-07 Jonathan J. Fortney , William B. Hubbard

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…

Earth and Planetary Astrophysics · Physics 2020-03-18 Naor Movshovitz , Jonathan J. Fortney , Chris Mankovich , Daniel Thorngren , Ravit Helled

A comprehensive exploration of Uranus and Neptune is essential to understand the formation and evolution of the giant planets, in particular, solar system, in general, and, by extension, a vast population of exoplanets. Though core…

Earth and Planetary Astrophysics · Physics 2020-06-25 Sushil K. Atreya , Mark H. Hofstadter , Joong Hyun In , Olivier Mousis , Kim Reh , Michael H. Wong

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…

Earth and Planetary Astrophysics · Physics 2023-05-09 L. N. Fletcher , L. Sromovsky , V. Hue , J. I. Moses , S. Guerlet , R. A. West , T. Koskinen

We review our current understanding of the interior structure and thermal evolution of Saturn, with a focus on recent results in the Cassini era. There has been important progress in understanding physical inputs, including equations of…

Earth and Planetary Astrophysics · Physics 2016-09-22 Jonathan J. Fortney , Ravit Helled , Nadine Nettelmann , David J. Stevenson , Mark S. Marley , William B. Hubbard , Luciano Iess

The best constraints on the internal structures of giant planets have historically come from measurements of their gravity fields. These gravity data are inherently mostly sensitive to a planet's outer regions, providing only loose…

Earth and Planetary Astrophysics · Physics 2021-05-05 Christopher Mankovich , Jim Fuller

We present evolutionary sequences for Jupiter and Saturn, based on new nongray model atmospheres, which take into account the evolution of the solar luminosity and partitioning of dense components to deeper layers. The results are used to…

Astrophysics · Physics 2009-10-31 W. B. Hubbard , T. Guillot , M. S. Marley , A. Burrows , J. I. Lunine , D. S. Saumon

Direct measurements of the spectra of extrasolar giant planets are the keys to determining their physical and chemical nature. The goal of theory is to provide the tools and context with which such data are understood. It is only by putting…

Earth and Planetary Astrophysics · Physics 2009-10-05 Adam Burrows , Glenn Orton

We present a review of Saturn's interior structure and thermal evolution, with a particular focus on work in the past 5 years. Data from the Cassini mission, including a precise determination of the gravity field from the Grand Finale…

The distant ice giants of the Solar System, Uranus and Neptune, have only been visited by one space mission, Voyager 2. The current knowledge on their composition remains very limited despite some recent advances. A better characterization…

We use the clathrate hydrate trapping theory to calculate the enrichments in O, N, S, Xe, Ar and Kr compared to solar in Saturn's atmosphere. For this, we calibrate our calculations using two different carbon abundance determinations that…

Astrophysics · Physics 2009-11-11 Olivier Mousis , Yann Alibert , Willy Benz

The Saturn System has been studied in detail by the Cassini-Huygens Mission. A major thrust of those investigations has been to understand how Saturn formed and evolved and to place Saturn in the context of other gas giants and planetary…

Phase separation between hydrogen and helium at high pressures and temperatures leads to the rainout of helium in the deep interiors of Jupiter and Saturn. This process, also known as "helium rain", affects their long-term evolution.…

Earth and Planetary Astrophysics · Physics 2024-08-28 Saburo Howard , Simon Müller , Ravit Helled
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