Results 221 to 230 of about 14,704 (241)
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On the depth of the lunar regolith
The Moon, 1970The aim of this paper is to point out that if the sinuous rilles on the Moon represent trenches in the mare ground in which they meander, the existence of a great number of individual boulders on their slopes - as discovered on the high-resolution photographs taken by US Lunar Orbiters 4 and 5 in 1967 - suggests that the solid substrate of the lunar ...
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Discovery of Vapor Deposits in the Lunar Regolith
Science, 1993Lunar soils contain micrometer-sized mineral grains surrounded by thin amorphous rims. Similar features have been produced by exposure of pristine grains to a simulated solar wind, leading to the widespread belief that the amorphous rims result from radiation damage. Electron microscopy studies show, however, that the amorphous rims are compositionally
Lindsay P. Keller, David S. McKay
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2012
In the year 2004 NASA declared its mission to prepare for a return of man to the moon as early as 2015 but no later than 2020, while continuing with robotic missions to Mars (NASA 2004). As a long-term goal, it was intended to establish permanent human presence on the moon and eventually send human missions to Mars.
Carsten Schwandt +3 more
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In the year 2004 NASA declared its mission to prepare for a return of man to the moon as early as 2015 but no later than 2020, while continuing with robotic missions to Mars (NASA 2004). As a long-term goal, it was intended to establish permanent human presence on the moon and eventually send human missions to Mars.
Carsten Schwandt +3 more
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Noble gases in the lunar regolith
Chinese Journal of Geochemistry, 2003The most fundamental character of lunar soil is its high concentrations of solar-wind-implanted elements, and the concentrations and behavior of the noble gases He, Ne, Ar, and Xe, which provide unique and extensive information about a broad range of fundamental problems.
Zou Yongliao, Xu Lin, Ouyang Ziyuan
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Electron Microscopy in the Study of Lunar Regolith
Crystallography Reports, 2021The results of long-term mineralogical studies of the lunar regolith, obtained using analytical scanning and transmission electron microscopy, are presented. These studies revealed 105 mineral phases new for the Moon, 43 of which were discovered for the first time under natural conditions; an electronic link to the final table is given.
T. A. Gornostaeva +4 more
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Isotopic Variability of Nitrogen in Lunar Regolith
Science, 2001Hashizume et al . ([1][1]) claim that the distribution and isotopic composition of nitrogen in the lunar regolith can be explained by a two-component mixing model. Their report, however, fails to discuss the bulk of existing relevant data—data that show unequivocally that the conclusions in ([1 ...
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A record of impacts preserved in the lunar regolith
Earth and Planetary Science Letters, 2010Abstract The absolute chronology of meteoroid impacts on the Moon is largely quantified by only a few 40Ar/39Ar “plateau ages” of rocks thought to be associated with specific impact events ( Stoffler et al., 2006 ). We demonstrate a more broadly applicable approach by using high-resolution 40Ar/39Ar thermochronometry to investigate the physical ...
Benjamin P. Weiss +8 more
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Influence of Mineral Composition on Sintering Lunar Regolith
Journal of Aerospace Engineering, 2017AbstractThe authors investigate mechanical properties of sintered lunar regolith. Using JSC-1A and DNA lunar simulants, they study the influence of changes in glass content, main plagioclase series...
A. Meurisse +4 more
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Lunar regolith control and resource utilization
2009 IEEE Long Island Systems, Applications and Technology Conference, 2009The major process for weathering and erosion on the moon is micro-meteorite impact. This produces the outer blanket of the moon known as lunar regolith or soil, which consists of numerous particles of various sizes. Lunar dust (defined as particles ≪20um) makes up about 20 wt% of the typical lunar soil.
Ronald Pirich +2 more
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Interpretation of Electrostatic Properties of Lunar Regolith
Proceedings, annual meeting, Electron Microscopy Society of America, 1972Evidence of a net surface charge on lunar regolith components and of their persistent internal polarization was discussed in a recent paper with references to charge significance for particle aggregation (Figs. 1-5); regolith dynamics; lunar dust storms; track density evaluation and albedo.
G. Arrhenius, S. K. Asunmaa
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