On the internal structures of mercury and venus

  title={On the internal structures of mercury and venus},
  author={R. Lyttleton},
  journal={Astrophysics and Space Science},
  • R. Lyttleton
  • Published 1969
  • Physics
  • Astrophysics and Space Science
Recent radar measures of the radius and mass of Mercury imply a composition for the planet containing about 60% iron. One or other of two conclusions seems inescapable: either that Mercury is a highly exceptional object among terrestrial planets, or that all measures to date of the planet involve substantial systematic error. In either case the situation is such that independent checking of the radius and mass of Mercury by some entirely different means has become of the greatest importance to… Expand
Structure of the Terrestrial Planets
BULLEN1 has suggested that to reconcile known data for Venus, Earth and Mars with the hypothesis that they have the same overall composition, the outer core of the Earth may be composed of Fe2O. TheExpand
The end of the iron-core age
The terrestrial planets aggregated essentially from small particles, to begin as solid cool bodies with the same general compositions, and there is no possibility of an iron-core developing withinExpand
The Interior Configuration of Planet Mercury Constrained by Moment of Inertia and Planetary Contraction.
This paper presents an analysis of present-day interior configuration models for Mercury considering cores of Fe-S or Fe-Si alloy, the latter possibly covered by a solid FeS layer, in light of theExpand
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Structure and Evolutionary History of the Solar System
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Structure and evolutionary history of the solar system, III
Parts I and II of our analysis of the evolution of the solar system were devoted mainly to the mechanical processes. The present part (Part III) deals primarily with the plasma processes and theExpand
Structure of the terrestrial planets
Recent reviews (cf. Runcorn, 1968; or Cook, 1972, 1975) on the structure of the planets omit reference to the phase-change hypothesis for the nature of the terrestrial core, despite that numerousExpand
The Solar System: Sun and Planets
The Universe is all the mass that exists, spanning from the largest galaxies to the tiny subatomic particle. Furthermore, as mass is exchangeable with energy, the Universe also encompasses all forcesExpand
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Developments in geophysics
Recent claim by Jeffreys that thermal contraction is the only mechanism yielding a real reduction of the Earth remotely near sufficient for mountain-formation is demonstrably incorrect, since theExpand


On the phase-change hypothesis of the structure of the Earth
  • R. Lyttleton
  • Chemistry
  • Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
  • 1965
The hypothesis that the liquid core of the Earth represents a phase-change at high pressure (and suitable temperature) of the mantle material is further investigated. A more accurate series ofExpand
Radar Determination of the Radius of Venus
The radius of Venus has been determined from radar-range data taken at the Jet Propulsion Laboratory's Goldstone facility from equations of motion of the solar-system fit to this time-delay data. Expand
The Case for the Radar Radius of Venus
The Venus radius of 6085 � 10 kilometers, deduced from combining observations made with the Venera 4 and Mariner V space probes is incompatible with the value of 6050 � kilometers determined fromExpand
Prediction and confirmation of olivine—spinel transition in Ni2SiO4
Abstract It is possible to predict the pressure at which a compound will transform to a denser polymorph by a study of solid solutions of the given compound with compounds possessing closer atomicExpand