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  • Life and Medical Sciences  (1,435)
  • GEOPHYSICS  (755)
  • LUNAR AND PLANETARY EXPLORATION  (533)
  • 1985-1989  (2,723)
  • 1989  (2,723)
Collection
Keywords
Publisher
Years
  • 1985-1989  (2,723)
Year
  • 1
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    Voyager's Last Encounter (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: This video describes Voyager 2's encounter with Neptune. Computer animation and actual data convey Voyager's discoveries such as turbulent storms and dark spots in Neptune's atmosphere, six new moons, Neptune's three rings, and the presence of frozen methane on Triton, as researchers at NASA's Jet Propulsion Laboratory describe Voyager's achievements.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: ASR-251 , NASA-TM-109361 , NONP-NASA-VT-94-198208
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Global Climate Study (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The Global Surface Radiation Budget Experiment, which determines if current climate models are accurate, is explained.
    Keywords: GEOPHYSICS
    Type: ASR-250 , NASA-TM-109612 , NONP-NASA-VT-93-190410
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    NASA's plans for manned missions to the moon and Mars (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: Issues, problems, and potential solutions of the lunar and Mars missions which will be undertaken in the first decade of the next century are discussed. Arguments are made for the feasibility and usefulness of a lunar base, and an evolutionary approach to a manned Mars mission involving a preliminary mission to Phobos is outlined. The Shuttle Z concept for both moon and Mars missions which involves a dual use of a spacecraft transfer stage operating also as a booster third stage is defined.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Spaceflight (ISSN 0038-6340); 31; 297-302
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Planetary cartography in the next decade: Digital cartography and emerging opportunities (1989)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Planetary maps being produced today will represent views of the solar system for many decades to come. The primary objective of the planetary cartography program is to produce the most complete and accurate maps from hundreds of thousands of planetary images in support of scientific studies and future missions. Here, the utilization of digital techniques and digital bases in response to recent advances in computer technology are emphasized.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-4092 , NAS 1.15:4092
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Iridium in the Vredefort Bronzite Granophyre - Impact melting and limits on a possible extraterrestrial component (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The Bronzite Granophyre was analyzed for Ir and other elements to examine whether its origin was due to impact melting or conventional igneous assimilation and to search for a possible extraterrestrial component in the melt. No such component is identified. Ir values range from 50-130 pg/g, equivalent to less than 0.05 percent C1 material. Further evidence against an extraterrestrial source of siderophiles are the low Ir/Au ratios and the absence of systematic correlations between Ir and other elements. However, the Granophyre is significantly enriched in Ir over other Vredefort granitic rocks, implying a fundamental difference between them. Geochemical mixing models indicate that the Ir observed in the Granophyre can be supplied from high-Ir local shales and quartzites during an impact melting event. The results are consistent with the view that the Granophyre is an impact melt and that Vredefort is an impact structure.
    Keywords: GEOPHYSICS
    Type: Lunar and Planetary Science Conference; Mar 14, 1988 - Mar 18, 1988; Houston, TX; United States
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    NASA TECHNICAL REPORTS
  • 6
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    The planning and execution of ER-2 and DC-8 aircraft flights over Antarctica, August and September 1987 (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The significant ozone loss in the lower stratosphere over Antarctica during recent austral springs was studied by instrumented ER-2 and DC-8 aircraft. Data on the homogeneous gas composition, polar stratospheric clouds, and on tracers for dynamic motion are provided. The mission design is described, the aircraft and their payloads are documented, and the flight tracks are specified.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research (ISSN 0148-0227); 94; 11181-11
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    The role of NASA in geodynamics research - Past and future (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: NASA participation in geophysics and geodynamics studies is addressed. Recent NASA activities in these areas are reviewed and plans and suggestions for the future are outlined. International cooperative activities in geophysics and geodynamics are briefly examined. New technologies that will be applied are considered.
    Keywords: GEOPHYSICS
    Type: EOS (ISSN 0096-3941); 70; 713
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    NASA TECHNICAL REPORTS
  • 8
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    Report of the 90-day study on human exploration of the Moon and Mars (1989)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: The basic mission sequence to achieve the President's goal is clear: begin with Space Station Freedom in the 1990's, return to the Moon to stay early in the Next century, and then journey to Mars. Five reference approaches are modeled building on past programs and recent studies to reflect wide-ranging strategies that incorporate varied program objectives, schedules, technologies, and resource availabilities. The reference approaches are (1) balance and speed; (2) the earliest possible landing on Mars; (3) reduce logistics from Earth; (4) schedule adapted to Space Station Freedom; and (5) reduced scales. The study and programmatic assessment have shown that the Human Exploration Initiative is indeed a feasible approach to achieving the President's goals. Several reasonable alternatives exist, but a long-range commitment and significant resources will be required. However, the value of the program and the benefits to the Nation are immeasurable.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA-TM-102999 , NAS 1.15:102999
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Planetary volcanism - A study of volcanic activity in the solar system (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: The nature of volcanic activity, theoretical models of its role in planetary evolution, and the evidence for volcanism on the planets and planetary satellites are examined in an introductory overview for advanced undergraduate and graduate students. Chapters are devoted to volcanism as a planetary process, the generation and evolution of magmas, magma ascent and eruption, the properties and behavior of volcanic flows, volcanic landforms, the distribution of volcanic rocks in the solar system, and volcanic plains and their development. Consideration is given to lunar volcanism, shield volcanoes and paterae, volcanism on Io, volcanism on icy satellites, and the rheological analysis of volcanic flows.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Exploration case studies (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: NASA's Office of Exploration has undertaken four case studies for prospective expansion of manned space activities beyond earth orbit. The subjects of these studies are (1) an expedition to the Martian moon Phobos; (2) a three-mission expedition to Mars; (3) the construction of a man-tended lunar observatory; and (4) the construction of a lunar outpost to serve as the basis for construction of a Martian outpost. The fourth alternative would follow the recommendation of the National Commission on Space for the creation of a 'bridge between worlds' in which explorers would develop ways in which to 'live off the land' in a space environment.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Aerospace America (ISSN 0740-722X); 27; 40-43
    Format: text
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    NASA TECHNICAL REPORTS
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