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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 275 (1978), S. 39-40 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To estimate the interstellar dust density, we make the usual assumption that the number density of the interstellar particles (nIS) is related to the local hydrogen number density in the ratio of 10-12 (see ref. 5). The local hydrogen density within a few parsecs of the Sun has been observed to be ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 331 (1988), S. 124-124 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR—The abundant complex organic refractory molecules revealed by the Vega/Giotto mass-spectrometer analysis of the dust of comet Halley1 and the 3.4-um emission observed from space and from the ground by five groups (for example, ref. 2) are the subject of controversy. What are they and ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 321 (1986), S. 385-385 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR-As I write this letter in early March only the scantiest information has come out of the Giotto mission. One of the most interesting preliminary findings was that comet Halley appeared to be quite dark. This may seem to be inconsistent with the high degree of reflectivity one might expect from ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 316 (1985), S. 403-407 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Inactivation of spores (Bacillus subtilis) has been investigated for the first time in the laboratory by vacuum ultraviolet radiation in simulated interstellar conditions. Remarkably, damage produced at the normal interstellar particle temperature of 10 K is less than at higher temperatures, the ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 327 (1987), S. 214-216 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] We consider the forces acting on the dust which is located near the upper and lower faces of the disk of a spiral galaxy. In this position the radiation force coming from the stars of the galaxy is not isotropic and results in a net effect of expelling dust from the disk. Here we present only the ...
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