On the internal structures of mercury and venus

  title={On the internal structures of mercury and venus},
  author={Raymond Arthur Lyttleton},
  journal={Astrophysics and Space Science},
  • R. Lyttleton
  • Published 1 September 1969
  • Physics, Geology
  • 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… 
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. The
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 within
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 the
Application to other planets and the Moon
The distributions of the density ρ, pressure p, and incompressibility k, as derived for the Earth in the preceding chapters, bear strongly on the estimation of the distributions in other planets. The
Structure and Evolutionary History of the Solar System
In this fourth and last part of our analysis, the first section (14) contains a study of the chemical composition of the planets and satellites. A sharp distinction is made between the large quantity
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 numerous
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 forces
Chemical Differentiation. The Matrix of the Groups of Bodies
In this fourth and last part of our analysis, the first section (14) contains a study of the chemical composition of the planets and satellites. A sharp distinction is made between the large quantity
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 the
Explaining Mercury’s density through magnetic erosion


On the phase-change hypothesis of the structure of the Earth
  • R. Lyttleton
  • Geology
    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 of
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.
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 from