Results 211 to 220 of about 38,180 (266)
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Earth, Moon, and Planets, 1985
In situ measurements at the lunar surface at millimeter resolution by the Apollo astronauts have been analyzed. Several statistical parameters have been determined for the landing site. The surface roughness has been found to be very nearly gaussian. The root-mean-square slopes have been obtained over scales between 0.5 mm and 5 cm.
LUMME, K +2 more
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In situ measurements at the lunar surface at millimeter resolution by the Apollo astronauts have been analyzed. Several statistical parameters have been determined for the landing site. The surface roughness has been found to be very nearly gaussian. The root-mean-square slopes have been obtained over scales between 0.5 mm and 5 cm.
LUMME, K +2 more
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Journal of the Soil Mechanics and Foundations Division, 1973
The index properties of returned lunar soils from the United States Apollo and the Soviet Luna programs are reviewed. The scope of the paper includes lunar soil genesis, particle types, grain size distribution, grain shape distribution, specific gravity, minimum and maximum density, and relative density.
James K. Mitchell +2 more
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The index properties of returned lunar soils from the United States Apollo and the Soviet Luna programs are reviewed. The scope of the paper includes lunar soil genesis, particle types, grain size distribution, grain shape distribution, specific gravity, minimum and maximum density, and relative density.
James K. Mitchell +2 more
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Nature, 1967
PREVIOUS models of the lunar surface layer have necessarily been constructed on the basis of indirect evidence, such as the way in which the surface reflected sunlight and radar pulses, or the manner in which it cooled during an eclipse. The photometric properties, in particular, have been utilized in model construction, because they were considered to
Joel E. M. Adler, John W. Salisbury
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PREVIOUS models of the lunar surface layer have necessarily been constructed on the basis of indirect evidence, such as the way in which the surface reflected sunlight and radar pulses, or the manner in which it cooled during an eclipse. The photometric properties, in particular, have been utilized in model construction, because they were considered to
Joel E. M. Adler, John W. Salisbury
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Lunar Soil Simulants- An Assessment
2019 9th International Conference on Recent Advances in Space Technologies (RAST), 2019In this study an assessment is done about lunar soil simulants. It is found that until now more than 40 simulants are produced in 9 countries. This procedure is a still ongoing one, after its start in the year 1990. The list of the simulants produced given in the paper is the most comprehensive one and it includes not only all of the types given in ...
Toklu, Yusuf Cengiz, Akpinar, Pinar
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Penetration resistance of lunar soils
Journal of Terramechanics, 1971Abstract Penetration resistance, in terms of the slope G of the stress penetration curve, has been correlated with density for a basaltic lunar soil simulant. The values were measured with the standard WES 30° cone penetrometer. This lunar soil simulant has been found to possess the same penetration resistance characteristics as the Apollo ...
W.N. Houston, L.I. Namiq
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Icarus, 1970
Abstract Because the lunar soil is darker than its parent rocks, it is often assumed that some process such as radiation darkening must have affected it. It is shown that the unusually high opaque mineral content of lunar rocks alone could account for the generally low albedo of the soil.
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Abstract Because the lunar soil is darker than its parent rocks, it is often assumed that some process such as radiation darkening must have affected it. It is shown that the unusually high opaque mineral content of lunar rocks alone could account for the generally low albedo of the soil.
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Search for strangelets in lunar soil
Journal of Physics G: Nuclear and Particle Physics, 2006The possible existence of strangelets has been hypothesized for a long time but has not been confirmed experimentally. Our experiment aims to search for strangelets in lunar soil samples, where the predicted concentration of one oxygen strangelet per 1016–1017 normal oxygen atoms is 104 times higher than that on earth.
Ke Han, the LSSS Collaboration
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Production of lunar soil simulant in Turkey [PDF]
2017 8th International Conference on Recent Advances in Space Technologies (RAST), 2017 It is obvious that lunar structures will be constructed on lunar surface, and that the materials to be used are only lunar soil. That is why lunar soils has to be investigated thoroughly as to its physical, chemical and mechanical properties. Unfortunately there is not enough lunar rock or soil brought to Earth for being able to run these analyses. For
YAYLI, MUSTAFA ÖZGÜR +3 more
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Reviews of Geophysics, 1975
The moon is covered with a thin layer of unconsolidated debris called the lunar regolith. A typical sample of this regolith could be characterized as a gray, poorly sorted pebble‐ or cobble‐bearing silty sand having a bulk density of about 1.5 g/cm³. It consists of lithic and mineral fragments mostly from the local underlying bedrock and glass formed ...
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The moon is covered with a thin layer of unconsolidated debris called the lunar regolith. A typical sample of this regolith could be characterized as a gray, poorly sorted pebble‐ or cobble‐bearing silty sand having a bulk density of about 1.5 g/cm³. It consists of lithic and mineral fragments mostly from the local underlying bedrock and glass formed ...
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On the origin of lunar soil 12033
Earth and Planetary Science Letters, 1971Lunar soil 12033 bulk chemical analysis, suggesting mixture of exotic component with local soil in 41/59 ...
Frank Cuttita +4 more
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