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  • 1
    Digitale Medien
    Digitale Medien
    The entropy of a cratered surface (1980)
    Springer
    Earth, moon and planets 22 (1980), S. 323-329 
    Details
    ISSN: 1573-0794
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The definition of the entropy of a cratered surface is given by analogy with the entropy of the information theory. The saturation, defined as the ratio between the area covered by craters of diameterD and the total observed area, is adopted as a measure of the probability to find a portion of a planetary surface covered by craters of the given diameterD. The meaning of such a new function is discussed in comparison with statistical approaches to the study of the cratering. Applications to Mercury are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01259288
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Smart-1: The First Time Of Europe To The Moon; Wandering in the Earth–Moon Space (1999)
    Springer
    Earth, moon and planets 85-86 (1999), S. 379-390 
    Details
    ISSN: 1573-0794
    Schlagwort(e): Flight dynamics ; Moon ; space missions ; technology
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract After 40 years from the first lunar missions, Europe has startedfor the first time the development of a mission which has the Moonas a target. SMART-1 will be the first Western-European mission tothe Earth's satellite. The primary objective of the mission is toflight test technology innovation for the future scientificdeep-space missions. This paper describes the mission concept, thetechnology and the scientific aspects.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1017065326516
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Formation of the sodium clouds and the regolith on Io by micrometeoroid impacts (1980)
    Springer
    Earth, moon and planets 22 (1980), S. 177-183 
    Details
    ISSN: 1573-0794
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract The effects of the amount of sodium ions, their solar angles correlation, temperature and velocities, have been explained as consequences of the almost full penetration of the second mode of micrometeorite fluxes (M〉10−8 g) across the Io atmosphere to its surface, whereas volcanism may satisfy only the amount of sodium. Conclusions about the formation of fine grains on the Io surface, unflooded by lava, are presented. Due to its large specific surface (m2 g−1) the interaction of this topsoil and the Io atmosphere is no less important than the lava-atmosphere interaction.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00898428
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    The hypsometric curve of Mars (1980)
    Springer
    Earth, moon and planets 22 (1980), S. 201-210 
    Details
    ISSN: 1573-0794
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Geologie und Paläontologie , Physik
    Notizen: Abstract For the construction of the hypsometric curve of Mars the topographic map of the planet produced by the U.S.G.S. has been utilized. All the areas delimited by isolines and geographic grid have been measured, then summing all the contributions given by the areas included between the same isolines. Such measurements have been effected by means of a solid-state optical image analyzer. A comparative study of the hypsometric curves of the Earth and the Moon shows that, on Mars, several processes of vertical differentiation of the crust started, but did not develop completely owing to the exhaustion of the endogenic forces which determine the surficial dynamics of a planet. A model of the evolution of the Martian crust is discussed in order to justify the shape of the hypsometric curve.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00898431
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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