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  • Other Sources  (109)
  • Lunar and Planetary Science and Exploration  (109)
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  • Condensed Matter: Electronic Properties, etc.
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  • 2015-2019
  • 2005-2009  (109)
  • 2009  (52)
  • 2007  (57)
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  • Other Sources  (109)
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  • 2015-2019
  • 2005-2009  (109)
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  • 1
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    Ethane Ices in the Outer Solar System: Spectroscopy and Chemistry (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: We report recent experiments on ethane ices made at temperatures applicable to the outer Solar System. New near- and mid-infrared data for crystalline and amorphous ethane, including new spectra for a seldom-studied solid phase that exists at 35-55 K, are presented along with radiation-chemical experiments showing the formation of more-complex hydrocarbons
    Keywords: Lunar and Planetary Science and Exploration
    Type: Icarus (ISSN 0019-1035); 203; 2; 677-680
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  • 2
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    The International Lunar Network (ILN) and the US Anchor Nodes Mission (2009)
    In:  CASI
    Details
    Publication Date: 2013-04-10
    Description: This presentation reviews the International Lunar Network (ILN) mission, a cooperative effort designed to coordinate individual lunar landers in a geophysical network on the lunar surface. The presentation also includes information on the geophysical network, mission operations, and recent accomplishments.
    Keywords: Lunar and Planetary Science and Exploration
    Type: M09-0817 , NLSI Lunar Science Forum; 21-23 Jul. 2009; Moffett Field, CA; United States
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  • 3
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    STARDUST Curation and Science at JSC (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Dust particles released from comet 81P/Wild-2 were captured in silica aerogel on-board the STARDUST spacecraft and returned to Earth on January 15, 2006. STARDUST recovered thousands of particles ranging in size from 1 to 100 micrometers. During the six month Preliminary Examination period an international consortium of 180 scientists investigated their mineralogy/petrology, organic/inorganic chemistry, optical properties and isotopic compositions. Stardust samples are now available for research by the entire research community.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Discovery@15 Conference; Sep 19, 2007 - Sep 20, 2007; Huntsville, AL; United States
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  • 4
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    Clay Bearing Units in the Region around Mawrth Vallis: Stratigraphy, Extent, and Possible Alteration Fronts (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The largest exposure of phyllosilicates on Mars occurs on the highland plains around Mawrth Vallis. This exposure extends for about 300 km southward from the edge of the dichotomy boundary, covering an area greater than 200 x 300 kilometers over an elevation range of approximately 2000 meters. At least two different types of hydrated phyllosilicates (Fe/Mg-rich and Al-rich phyllosilicates) have been identified in OMEGA data based on absorption bands near 2.3 and 2.2 micrometers, respectively. These clay-bearing units are associated with layered, indurated light-toned units with complex spatial and stratigraphic relationships, and are unconfomably overlain by a darker, indurated, more heavily cratered unit. Ongoing analysis of OMEGA (approximately 1 kilometer/pixel) and CRISM multi-spectral (MSP, 200 meters/pixel) data reveal hydrated minerals with absorptions at approximately 2.2 or 2.3 micrometers in locations up to 300 kilometers away from the borders of the previously identified extent of clay-bearing units. We seek to: 1) further constrain the mineralogy of the hydrated species identified in [5], and 2) understand spatial and stratigraphic relationships between the different hydrated minerals and the cratered plains units in which they are found. In this work we perform mineralogical and stratigraphic comparisons between units to test whether these extended units may be related, in order to establish a broad zone of alteration.
    Keywords: Lunar and Planetary Science and Exploration
    Type: 39th Lunar and Planetary Science Conference; Mar 10, 2008 - Mar 14, 2008; League City, TX; United States
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  • 5
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    Imaging Thermal He(+)in Geospace from the Lunar Surface (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: By mass, thermal plasma dominates near-earth space and strongly influences the transport of energy and mass into the earth's atmosphere. It is proposed to play an important role in modifying the strength of space weather storms by its presence in regions of magnetic reconnection in the dayside magnetopause and in the near to mid-magnetotail. Ionospheric-origin thermal plasma also represents the most significant potential loss of atmospheric mass from our planet over geological time. Knowledge of the loss of convected thermal plasma into the solar wind versus its recirculation across high latitudes and through the magnetospheric flanks into the magnetospheric tail will enable determination of the mass balance for this mass-dominant component of the Geospace system and of its influence on global magnetospheric processes that are critical to space weather prediction and hence to the impact of space processes on human technology in space and on Earth. Our proposed concept addresses this basic issue of Geospace dynamics by imaging thermal He(+) ions in extreme ultraviolet light with an instrument on the lunar surface. The concept is derived from the highly successful Extreme Ultraviolet imager (EUV) flown on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) spacecraft. From the lunar surface an advanced EUV imager is anticipated to have much higher sensitivity, lower background noise, and higher communication bandwidth back to Earth. From the near-magnetic equatorial location on the lunar surface, such an imager would be ideally located to follow thermal He(+) ions to high latitudes, into the magnetospheric flanks, and into the magnetotail.
    Keywords: Lunar and Planetary Science and Exploration
    Type: 2007 NASA/NAC Lunar Exploration Architecture Workshop; Feb 27, 2007 - Mar 02, 2007; Tempe, AZ; United States
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  • 6
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    Stardust Curation at Johnson Space Center: Photo Documentation and Sample Processing of Submicron Dust Samples from Comet Wild 2 for Meteoritics Science Community (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Dust particles released from comet 81P/Wild-2 were captured in silica aerogel on-board the STARDUST spacecraft and successfully returned to the Earth on January 15, 2006. STARDUST recovered thousands of particles ranging in size from 1 to 100 micrometers. The analysis of these samples is complicated by the small total mass collected ( 〈 1mg), its entrainment in the aerogel collection medium, and the fact that the cometary dust is comprised of submicrometer minerals and carbonaceous material. During the six month Preliminary Examination period, 75 tracks were extracted from the aerogel cells , but only 25 cometary residues were comprehensively studied by an international consortium of 180 scientists who investigated their mineralogy/petrology, organic/inorganic chemistry, optical properties and isotopic compositions. These detailed studies were made possible by sophisticated sample preparation methods developed for the STARDUST mission and by recent major advances in the sensitivity and spatial resolution of analytical instruments.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science Conference; Mar 12, 2007 - Mar 16, 2007; Houston, TX; United States
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  • 7
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    Early Impacts on the Moon: Crystallization Ages of Apollo 16 Melt Breccias (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A better understanding of the early impact history of the terrestrial planets has been identified one of the highest priority science goals for solar system exploration. Crystallization ages of impact melt breccias from the Apollo 16 site in the central nearside lunar highlands show a pronounced clustering of ages from 3.75-3.95 Ga, with several impact events being recognized by the association of textural groups and distinct ages. Here we present new geochemical and petrologic data for Apollo 16 crystalline breccia 67955 that document a much older impact event with an age of 4.2 Ga.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science Conference; Mar 12, 2007 - Mar 16, 2007; Houston, TX; United States
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  • 8
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    Sm-Nd Isotopic Systematics of Troctolite 76335 (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A study of the Sm-Nd isotopic systematics of lunar Mg-suite troctolite 76335 was undertaken to further establish the early chronology of lunar magmatism. Because the Rb-Sr isotopic systematics of similar sample 76535 yielded an age of 4570 +/- 70 Ma [2, lambda = 1.402 x 10(exp -11)], 76335 was expected to yield an old age. In contrast, the Sm-Nd and K-Ar ages of 76535 indicate that the sample is approximately 4260 Ma old, one of the youngest ages obtained for a Mg-suite rock. This study establishes the age of 76335 and discusses the constraints placed on its petrogenesis by its Sm-Nd isotope systematics. The Sm-Nd isotopic system of lunar Mg-suite troctolite 76335 indicates an age of 4278 +/- 60 Ma with an initial epsilon (sup 143)(sub Nd) value of 0.06 +/- 0.39. These values are consistent with the Sm-Nd isotopic systematics of similar sample 76535. Thus, it appears that a robust Sm-Nd age can be determined from a highly brecciated lunar sample. The Sm-Nd isotopic systematics of troctolites 76335 and 76535 appear to be different from those dominating the Mg-suite norites and KREEP basalts. Further analysis of the Mg-suite must be completed to reveal the isotopic relationships of these early lunar rocks.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Lunar and Planetary Science Conference; Mar 12, 2007 - Mar 16, 2007; Houston, TX; United States
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  • 9
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    The International Lunar Network (ILN) Anchor Nodes Mission Update (2009)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: NASA s Science Mission Directorate (SMD) established the Lunar Quest Program (LQP) to accomplish lunar science objectives embodied in the National Academies report The Scientific Context for Exploration of the Moon (2007) and the NASA Advisory Council-sponsored Workshop on Science Associated with the Lunar Exploration Architecture (2007). A major element of LQP's lunar flight projects is the International Lunar Network (ILN), a network of small geophysical nodes on the lunar surface. NASA plans to provide the first two stations around 2014 and a second pair in the 2016-2017 timeframe. International involvement to provide additional stations will build up the network so that 8-10 nodes could be simultaneously operating. This flight project complements SMD's initiatives to build a robust lunar science community through R&A lines and increases international participation in NASA's robotic exploration of the moon.
    Keywords: Lunar and Planetary Science and Exploration
    Type: M09-0332 , Lunar and Planetary Science Conference; Mar 22, 2009 - Mar 25, 2009; Houston, TX; United States
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  • 10
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    Scientific Exploration of Near-Earth Objects via the Crew Exploration Vehicle (2007)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: The concept of a crewed mission to a Near-Earth Object (NEO) has been analyzed in depth in 1989 as part of the Space Exploration Initiative. Since that time two other studies have investigated the possibility of sending similar missions to NEOs. A more recent study has been sponsored by the Advanced Programs Office within NASA's Constellation Program. This study team has representatives from across NASA and is currently examining the feasibility of sending a Crew Exploration Vehicle (CEV) to a near-Earth object (NEO). The ideal mission profile would involve a crew of 2 or 3 astronauts on a 90 to 120 day flight, which would include a 7 to 14 day stay for proximity operations at the target NEO. One of the significant advantages of this type of mission is that it strengthens and validates the foundational infrastructure for the Vision for Space Exploration (VSE) and Exploration Systems Architecture Study (ESAS) in the run up to the lunar sorties at the end of the next decade (approx.2020). Sending a human expedition to a NEO, within the context of the VSE and ESAS, demonstrates the broad utility of the Constellation Program s Orion (CEV) crew capsule and Ares (CLV) launch systems. This mission would be the first human expedition to an interplanetary body outside of the cislunar system. Also, it will help NASA regain crucial operational experience conducting human exploration missions outside of low Earth orbit, which humanity has not attempted in nearly 40 years.
    Keywords: Lunar and Planetary Science and Exploration
    Type: 38th Lunar and Planetary Science Conference; Mar 12, 2007 - Mar 16, 2007; Houston, TX; United States
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