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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 66 (1979), S. 134-139 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract The interplanetary dust cloud, total mass 1010–1020 g in round figures, originates as fragments of comets and produces a mean flux at the earth-moon system in the range 10−13–10−12 g m−2 s−1. Over 2/3 of the mass consists of particles with individual weights 10−3 to 10−6 g. They are fragile, are continually broken up into smaller pieces by collisions, and have a chemical composition similar to that assumed as the average for the entire solar system. The cloud extends to roughly 3 a.u. from the sun in the ecliptic plane, with a particle space density falling off as r −v , where r is distance from the sun and v is in the range 1 to 1.5.
    Type of Medium: Electronic Resource
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