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The outer planets and their satellites

Stevenson, D. J. (1978) The outer planets and their satellites. In: The origin of the solar system. Wiley , Chichester, NY, pp. 395-431. ISBN 9780471995296. https://resolver.caltech.edu/CaltechAUTHORS:20130723-134557661

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Abstract

The compositions and thermal histories of the outer planets and their satellites are discussed. Particular attention is given to how observations constrain models, and no particular cosmogonic prejudice is employed. The most important observations constraining the composition for gaseous planets are the average density, the gravitational moments, and the atmospheric composition. Thermal structure is constrained by the excess luminosity and planetary magnetic field. The hydrogen-helium planets (Jupiter and Saturn) are relatively well understood because the thermodynamics and transport properties of hydrogen-helium mixtures are amenable to first principles calculations. Jupiter appears to be almost of primordial solar composition, but the deviation is significant and may represent an order of magnitude enhancement of rock-forming elements. Saturn deviates even further from solar composition. Both planets have internal temperatures of order 10^4 K. Uranus and Neptune are much less well understood, mainly because of the paucity of relevant observations, but are predominantly 'icy'. Both planets are expected to have internal temperatures of at least one thousand (probably several thousand) K. The satellites form two groups: predominantly icy, and predominantly rocky (Moon-like). The largest icy satellites are expected to be fractionated and thermally active, with partially fluid interiors.


Item Type:Book Section
ORCID:
AuthorORCID
Stevenson, D. J.0000-0001-9432-7159
Additional Information:© 1978 Wiley.
Record Number:CaltechAUTHORS:20130723-134557661
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130723-134557661
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39537
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:20 Sep 2013 23:24
Last Modified:03 Oct 2019 05:08

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