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  • LUNAR AND PLANETARY EXPLORATION  (3,213)
  • Biochemistry and Biotechnology  (1,710)
  • 1980-1984  (4,923)
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Years
Year
  • 11
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    Press conference on Voyager 2 Saturn encounter (1981)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: P81-10211
    Format: text
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    NASA TECHNICAL REPORTS
  • 12
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    Planetary exploration program through the year 2000 - A progress report (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: This paper covers the solar system exploration committee including their recommendations and plan options, and study approach. Also included are: planetary and solar system exploration program; thrusts, methodology, goals, recent history, approach to reduce costs/increase efficiency, spacecraft, recent problems, and plans for FY 1982. All of the different program ingredients are emphasized.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: AAS 81-337 , Leadership in space for benefits on earth; Oct 26, 1981 - Oct 29, 1981; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 13
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    On the comparative evolution of Ganymede and Callisto (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The paper examines the differences in the apparent ages of the surfaces of Ganymede and Callisto revealed by Voyager images. The differences could be due to the persistence of tectonic activity on Ganymede beyond the time of early, heavy bombardment. The slightly greater radioactive content expected in Ganymede could prolong such activity by 0.5 million years beyond the cessation of endogenic surface activity on Callisto. It is concluded that if the different ages of the surfaces of Ganymede and Callisto are due to differences in internal evolution, the slightly higher radioactive content of Ganymede is the most likely cause; tidal dissipation could not have been important for Ganymede for more than 10 to the 8th power years, and it was never important for Callisto.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Icarus; 41; Feb. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 14
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    IR brightness and eclipse cooling of Saturn's rings (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Equatorial scans of Saturn at 20 microns wavelength, obtained with the Mayall 4-m telescope in 1978-79, show a continuing decrease in the specific brightness of the A and B rings as the ring plane projection approaches and edge-on apparition. The decreased brightness of the previously dominant B ring reveals more clearly a large difference in brightness between the east and west ansae portions of the C ring, in contrast to a barely discernible difference for the other ring ansae. The amount of eclipse cooling is compatible with a C ring particle size of about 1 cm. It is proposed here that the B ring brightness variation could partially result from a decrease of absorbed insolation by a modest amount of visible scattering.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Nature; 283; Feb. 28
    Format: text
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    NASA TECHNICAL REPORTS
  • 15
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    Scientific results from the Pioneer Saturn encounter - Summary (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The scientific results of the Pioneer Saturn encounter with Saturn are summarized. The Pioneer mission was designed to image the planet, its satellites and rings, and measure its particulate environment and the magnetic field and photon and charged particle radiation by means of 11 operational scientific instruments and its 2.293-GHz telemetry carrier signal. Principle results of the mission include the discovery of an additional ring and a previously unidentified satellite, the further characterization of the physical properties of Saturn and its magnetic field, and the description of the planetary magnetosphere. The successful completion of the mission demonstrated the ability of spacecraft such as Voyager 1 and 2 to survive the particle environments of Saturn's rings and trapped radiation environments, and Pioneer Saturn is expected to continue transmitting information on the interplanetary medium and the solar wind interaction with the interstellar medium until the mid-1980's.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Science; 207; Jan. 25
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  • 16
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    Interannual and short-term variations of the Venus nighttime hydrogen bulge (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Journal of Geophysical Research (ISSN 0148-0227); 89; 10669-10
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    NASA TECHNICAL REPORTS
  • 17
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    Planetary cartography in the next decade (1984 - 1994) (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The cartographic products required to support science and planetary exploration during the next 10 years were assessed. Only major map series or first order maps needed to characterize the surface physiography of a planet or satellite were considered. Included in these considerations are maps needed as bases for plotting geologic, geophysical, and atmospheric phenomena and for planning future planetary exploration. These products consist of three types of maps: controlled photomosaics, shaded relief maps, and topographic contour maps.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-SP-475 , NAS 1.21:475
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 18
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    Giacobini-Zinner comet: Polarimetric and physical observations (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The results of observations of the Giacobini-Zinner comet on 25 and 31 October 1959 are presented. The magnitude of the comet was measured photoelectrically in two spectral regions. The radius is on the order of one kilometer. The photoelectric measurements of comets 1959b and 1957c were used to measure the abundances of the CN and C2 radicals and of solid particles in the heads.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-77771 , NAS 1.15:77771
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 19
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    Meteorite bombardment and dating of planetary surfaces (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Dating by measurement of impact crater frequencies developed in the past years primarily on the basis of the data from the missions to the Moon and Mars. The method allows a good relative dating to be obtained and the moons of Jupiter and Saturn through photographic analyses. A cratering chronology was obtained for the period between the oldest Moon crust (4.3 to 4.4 billion years) to the present time which gives a good absolute dating of any areas of the Moon's surface.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-77558 , NAS 1.15:77558
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 20
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    Site certification and landing (1984)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The process by which the landing site for the Viking lander spacecraft was certified is described. Soviet attempts to investigate Mars using the Mars class spacecraft are reviewed. Radar as a tool to study planetary surfaces is discussed. The launch and flight of Viking 1 are recounted. The challenges and success of soft landing of the Viking lander on the Martian surface are described.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: On Mars: Exploration of the Red Planet, 1958 - 1978; p 317-362
    Format: text
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    NASA TECHNICAL REPORTS
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