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  • 1
    Electronic Resource
    Electronic Resource
    The entropy of a cratered surface (1980)
    Springer
    Earth, moon and planets 22 (1980), S. 323-329 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01259288
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    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
    Keywords: Flight dynamics ; Moon ; space missions ; technology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017065326516
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    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
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00898428
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The hypsometric curve of Mars (1980)
    Springer
    Earth, moon and planets 22 (1980), S. 201-210 
    Details
    ISSN: 1573-0794
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: 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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00898431
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    Paper (German National Licenses)
    Fulltext
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