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  • 1
    Digitale Medien
    Digitale Medien
    Hydrogen Loss from the Terrestrial Planets (1976)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Earth and Planetary Sciences 4 (1976), S. 265-292 
    Details
    ISSN: 0084-6597
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Geologie und Paläontologie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.ea.04.050176.001405
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    An interpretation of the Voyager measurement of jovian electron density profiles (1979)
    [s.l.] : Nature Publishing Group
    Nature 280 (1979), S. 795-796 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] THE Voyager 1 radio science experiment (RSS) obtained electron density profiles for the daytime and night-time ionosphere of Jupiter by radio occultation observations on 5 March 19791. The properties of the ionosphere were different from those obtained by the Pioneer 10 and 11 observations2'3 in ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/280795a0
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Detection of Negative Ions formed by Charge Transfer (1960)
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 1038-1039 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] On the other hand, the cross-section shows no such variation for argon. Thus it seems likely that the sudden increases which occur in the cross-section for electron loss are associated with a process which leaves the electron attached to the target molecule or a fragment of it after the collision ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1861038a0
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  • 4
    Digitale Medien
    Digitale Medien
    Excitation of the Lyman-α in the night sky (1962)
    Springer
    Space science reviews 1 (1962), S. 135-153 
    Details
    ISSN: 1572-9672
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The experiments pertaining to the excitations of Lyman-α radiation in the night sky are reviewed. Various possible modes of excitation are considered. Scattering of solar Lα in interplanetary hydrogen is not suitable because of an insufficient amount of hydrogen and difficulty in accounting for the large night time albedo contrasted with the small daytime value. Transport by multiple scattering in the exosphere produces an appreciable excitation as well as the correct variation of intensity as function of zenith angle. However, the process fails by a factor of 4 for a solar flux of 6 ergs/cm2 sec and the 3 × 1012 atoms/cm2 geocorona consistent with absorption measurements. A direct scattering in a geocoma far from the earth overcomes the albedo and thin atmosphere problems. However, there is difficulty in accounting for the presence of the amount of hydrogen necessary beyond 15 earth radii. Also the absence of Hα excitation by Lyman-β is a problem. No explanation so far proposed appears adequate. Experiments are suggested.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00174639
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  • 5
    Digitale Medien
    Digitale Medien
    Cometesimals in the inner Solar System (1987)
    [s.l.] : Nature Publishing Group
    Nature 330 (1987), S. 548-550 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] In searching the UVS data obtained from Voyager 1 and 2 near 1 AU for a Lyman-a signature near 1 AU we found one sequence of 17 observations made between 1 AU to ~2.5 AU in which the field of view was always in about the same part of the sky, downwind in the ISM. The observations in that sequence ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/330548a0
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  • 6
    Digitale Medien
    Digitale Medien
    Origin of Sodium and Lithium in the Upper Atmosphere (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 1480-1481 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] An attempt has been made to estimate the ratio of free lithium to free sodium from the intensity ratios found3. This estimate was based on the assumption that, apart from a factor of 17 arising from the presence of the Fraunhofer D lines in the solar spectrum and slightly different oscillator ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/1831480a0
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  • 7
    Digitale Medien
    Digitale Medien
    Why explore Venus? (1977)
    Springer
    Space science reviews 20 (1977), S. 259-263 
    Details
    ISSN: 1572-9672
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract This paper develops the rationale for a program of Venus exploration by man.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02186465
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  • 8
    Digitale Medien
    Digitale Medien
    Ultraviolet spectrometer experiment for the Voyager mission (1977)
    Springer
    Space science reviews 21 (1977), S. 183-205 
    Details
    ISSN: 1572-9672
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The Voyager Ultraviolet Spectrometer (UVS) is an objective grating spectrometer covering the wavelength range of 500–1700 Å with 10 Å resolution. Its primary goal is the determination of the composition and structure of the atmospheres of Jupiter, Saturn, Uranus and several of their satellites. The capability for two very different observational modes have been combined in a single instrument. Observations in the airglow mode measure radiation from the atmosphere due to resonant scattering of the solar flux or energetic particle bombardment, and the occultation mode provides measurements of the atmospheric extinction of solar or stellar radiation as the spacecraft enters the shadow zone behind the target. In addition to the primary goal of the solar system atmospheric measurements, the UVS is expected to make valuable contributions to stellar astronomy at wavelengths below 1000 Å.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00200850
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