Results 191 to 200 of about 2,310,283 (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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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
JOHN W. SALISBURY, JOEL E. M. ADLER
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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
JOHN W. SALISBURY, JOEL E. M. ADLER
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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.
W. Carrier +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.
W. Carrier +2 more
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Production of lunar soil simulant in Turkey
2017 8th International Conference on Recent Advances in Space Technologies (RAST), 2017It 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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Physical and Mechanical Characteristics of Lunar Soil at the Chang'E‐4 Landing Site
Geophysical Research Letters, 2020Chang'E‐4, with the Yutu‐2 rover, is the first lunar probe to successfully land and conduct a tour on the far side of the Moon from early 2019. We analyze the physical and mechanical characteristics of lunar soil through the in situ terrain data ...
Zhencheng Tang +15 more
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Multielement Analysis of Lunar Soil and Rocks
Science, 1970Results for multielement analysis of lunar soil and of seven rocks returned by Apollo 11 are presented. Sixty-six elements were determined with spark source mass spectrography and neutron activation. U. S. Geological Survey standard W-1 was used as a comparative standard.
G H, Morrison +6 more
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Advances in Engineering Software, 2020
The experimental execution, theoretical analysis, structural optimization and performance prediction of lunar rover wheels are subject to many limitations due to the particularity and complexity of the lunar environment.
Rui Zhang +7 more
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The experimental execution, theoretical analysis, structural optimization and performance prediction of lunar rover wheels are subject to many limitations due to the particularity and complexity of the lunar environment.
Rui Zhang +7 more
semanticscholar +1 more source
The Remanent Magnetization of Lunar Soils
Science, 1972The magnetic material in the lunar soils makes them potentially strong carriers of remanence and magnetically viscous. The soils therefore block remanence in the temperature range of the lunar diurnal cycle. This remanence is stable against alternating-field demagnetization.
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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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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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