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  • 1985-1989  (7)
Collection
Keywords
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Astrophysical Contributions of the International Ultraviolet Explorer (1989)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Astronomy and Astrophysics 27 (1989), S. 397-420 
    Details
    ISSN: 0066-4146
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.aa.27.090189.002145
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    Paper (German National Licenses)
    Fulltext
  • 2
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    The International Cometary Explorer (ICE) mission to comet Giacobini-Zinner (G/Z) (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The primary objectives of the International Cometary Explorer (ICE) mission is to provide in situ data on the interaction between solar wind and the atmosphere of the P/Giacobini-Zinner comet (G/Z), making measurements of particles, fields, and waves while passing through the cometary tail of G/Z on September 11, 1985. Following the G/Z tail intercept, the ICE measurements will complement the later upstream measurements obtained by the Comet Halley probe. The major ICE payload includes a vector helium magnetometer, the plasma-wave experiment, the radio-wave experiment, the plasma-electron experiment, and the plasma ion experiment. Other experiments are intended to measure energetic protons, X-rays, low energy to high energy cosmic rays, cosmic ray electrons, and gamma-ray bursts. The ICE measurements of G/Z will be supplemented with ground-based measurements. Schematic diagrams are included.
    Keywords: ASTRONAUTICS (GENERAL)
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Second generation spectrograph for the Hubble Space Telescope (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The preliminary design for the Space Telescope Imaging Spectrograph (STIS), which has been selected by NASA for definition study for future flight as a second-generation instrument on the Hubble Space Telescope (HST), is presented. STIS is a two-dimensional spectrograph that will operate from 1050 A to 11,000 A at the limiting HST resolution of 0.05 arcsec FWHM, with spectral resolutions of 100, 1200, 20,000, and 100,000 and a maximum field-of-view of 50 x 50 arcsec. Its basic operating modes include echelle model, long slit mode, slitless spectrograph mode, coronographic spectroscopy, photon time-tagging, and direct imaging. Research objectives are active galactic nuclei, the intergalactic medium, global properties of galaxies, the origin of stellar systems, stelalr spectral variability, and spectrographic mapping of solar system processes.
    Keywords: SPACECRAFT INSTRUMENTATION
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    NASA TECHNICAL REPORTS
  • 4
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    On the trail of Comet G-Z (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The International Cometary Explorer (ICE) is to investigate the magnetic and electric fields, plasmas, and particles in the Comet Giacobini-Zinner (G-Z) and to study its interaction with solar wind. The ICE can pass through the comet only once and it will take 90 minutes to cross from one side of the tail to the other. Since the Comet G-Z often changes its orbit due to nongravitational forces changing its direction and velocity, ICE's position needs to be adjusted. The probe is aimed 10,000 km from the nucleus in order to be provided the best passage through the Comet G-Z. The 64-meter dishes of JPL's Deep-Space Network (DSN) will receive data transmitted on two adjacent S-band frequencies at the rate of 1024 bits per second. Also NASA has arranged for the radio telescope at Arecibo to record the transmission. The Japanese 64-meter tracking antenna at Usada, equipped with an ultrasensitive receiver for one ICE frequency, will provide pre-encounter and post-encounter tracking. The ICE data may provide information about the dust tail in the Comet G-Z which could be compared to previous research.
    Keywords: ASTRONOMY
    Type: Sky and Telescope (ISSN 0037-6604); 70; 198-203
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    NASA TECHNICAL REPORTS
  • 5
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    IUE survey of planetary nebulae in the large and small magellanic clouds (1986)
    In:  Other Sources
    Details
    Publication Date: 2013-08-29
    Description: Twelve planetary nebulae of the 15 surveyed by IUE in the Megellanic Clouds were analyzed. Chemical abundances and other nebular parameters were determined, along with masses for the central stars. The latter are clustered in the range 0.58 to 0.71 solar masses, contrary to preliminary finding for 3 of the stars. This difference is attributed to the adoption of stellar atmosphere models that better represent the emergent flux distributions below the Lyman limit.
    Keywords: ASTRONOMY
    Type: ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE; p 295-298
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    NASA TECHNICAL REPORTS
  • 6
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    Where's the gas? (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The recent finding of hot interstellar hydrogen gas in elliptical galaxies is discussed. The belief held until recently that elliptics had no such gas and thus were past their star-forming stage is contradicted by new evidence obtained primarily with the X-ray images from the Einstein satellite. The hot gas is present in far greater amounts than could be accounted for by an outflowing galactic wind. The gas exists in isolated elliptics as well as in cluster members and thus is not part of the intracluster medium. It is concluded that the gas must be forming new small stars, since few massive hot stars are visible in elliptical galaxies.
    Keywords: ASTROPHYSICS
    Type: Natural History (ISSN 0028-0712); 94
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    The International Cometary Explorer (ICE)wallsheet teacher's guide (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: On September 11, 1985, the veteran NASA spacecraft ISEE-3 which has been renamed the International Cometary Explorer (ICE) will make the first visit of a spacecraft to a comet. A teachers' guide to the NASA wallsheet on the ICE and its mission is presented. This circumstance of course results from the current interest in the return of Halley's Comet. This teacher's guide will be helpful in understanding scientists strong interest in sending the ICE spacecraft to investigate the tail of a much less famous object Comet Giacobin-Zinner.
    Keywords: ASTROPHYSICS
    Type: NASA-TM-87498 , TG-101/9-85 , NAS 1.15:87498
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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