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  • 1
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A catalogue was compiled in the author's previous paper (Jones, 1969) of the relative brightness of 199 lunar features as observed at phase angles of 2°.1, 17°.5, 32°.5, 46°.2, 59°.4 and 72°.1 before full Moon, in the wavelength interval 5500 to 7000 Å. The present paper is concerned with an interpretation of this data in terms of the uniformity of the photometric function of the lunar surface. If due account is taken of the effect of second order scattering it is found that all the survey points studied scatter light according to the same photometric function independent of the type of terrain on which they are located.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Earth, moon and planets 1 (1969), S. 85-105 
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Abstract Photometric analysis of the penumbra during 21 eclipses between 1921 and 1968 based upon the homogeneous observational material reveals some anomalies which may be explained by the lunar luminescence excited by UV-X solar radiations whose sources are located in the low corona and above the K-3 plages. The influence of the terrestrial upper atmosphere is detectable on the border of the umbra.
    Notes: Sommaire L'analyse photométrique de la pénombre pendant 21 éclipses de 1921 à 1968 sur la base d'un matériau homogène d'observations revèle des anomalies explicables par la luminescence du sol lunaire excitée par les radiations UV-X solaires dont les sources se situent dans la basse couronne et au-dessus des plages K-3. L'influence de la haute atmosphère terrestre se manifeste au bord de l'ombre.
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  • 3
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Earth, moon and planets 1 (1970), S. 190-231 
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract This paper presents the results to date of the Jet Propulsion Laboratory (JPL) effort at analyzing the tracking data from the five Lunar Orbiter spacecraft. Emphasis is placed on the long-arc evaluation, to which most of the work was directed, rather than on the mascon analysis, which will be reported separately. The model of the Moon's gravity field that has been derived from the long-arc analysis is interpreted in terms of the Moon's mass distribution. The results are evaluated from the point of view of consistency and of statistical significance. In particular, the various factors contributing to the uncertainty in the estimation process are discussed.
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  • 5
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The conservation equations of mass, energy and momentum when applied to the problem of convection produced by isothermal compression as well as by thermal expansion in a self-gravitating sphere of uniform density, consisting of a core extending to a fractionŋ of the radius of the sphere and with a viscous mantle overlying the core, lead to a relationship between two characteristic numbers. In the present paper these characteristic numbers are evaluated, for the case when both boundaries of the mantle are free, for spherical harmonic disturbances of orders 1 → 6. It is found that the ease with which different patterns of convection can be excited changes as the characteristic numbers are varied.
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  • 6
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    Electronic Resource
    Springer
    Earth, moon and planets 1 (1970), S. 264-275 
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The selenographic direction cosines of the Earth and of the pole of the ecliptic are developed in trigonometric series; the time dependence of each term enters through the Delaunay arguments. These and other series are tabulated for different libration parameters to provide means for calculating at any epoch the lunar librations and their partial derivatives with respect to the parameters.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Earth, moon and planets 1 (1970), S. 293-294 
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
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  • 8
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The failure of an equilibrium model to provide an adequate representation of the Earth's external gravitational field suggests that one should consider a more general hydrodynamical model for the interior of the terrestrial globe, and the most probable cause of motion, which may significantly effect the distribution of density inside the Earth, is convection throughout the mantle. In the present paper we investigate the effects of convection in the mantle on the gravitational field of the Earth and calculate the velocity of convection necessary to account for the observed characteristics of the external gravitational field.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Earth, moon and planets 1 (1970), S. 403-425 
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
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  • 10
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The internal strain due to the tidal force in the proximity of a tide-generating body (in the present case, the Moon) is calculated according to the Lord Kelvin theory of Earth tides. The conditions for which uniform elastic sphere possessing a definite tensile strength is crushed near the surface of the Moon is investigated. The state of internal stress is almost independent of the value of elastic constants. Many lunar features, such as twin craters, craterous walled plains of irregular forms, compound craters, may be explained by fission of the meteoritic material before impact.
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