Results 161 to 170 of about 76,313 (208)

Lunar Regolith at Tranquillity Base

Science, 1970
The regolith at Tranquillity Base is a layer of fragmental debris that ranges in thickness from about 3 to 6 meters. The thickness of the regolith and the exposure histories of its constituent fragments can be related, by means of a relatively simple model, to the observed crater distribution.
E M, Shoemaker, M H, Hait, G A, Swann, D L, Schleicher, D H, Dahlem, G G, Schaber, R L, Sutton   +6 more
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The Evolution of the Lunar Regolith

Annual Review of Earth and Planetary Sciences, 1977
layer (regolith) was known long before the first soft landings, though its properties were not clearly understood. Nearly all our present knowledge derives from samples returned from the Moon, and secondarily from observations made on the surface or from lunar orbit.
Y Langevin, J R Arnold
openaire   +1 more source

Discovery of Vapor Deposits in the Lunar Regolith

Science, 1993
Lunar 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
L P, Keller, D S, McKay
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Properties of Lunar Regolith

1990
Abstract The lunar regolith consists of the fragmental unconsolidated mantle which overlies more consolidated or crystalline rocks at the surface of the moon. The thickness of the regolith ranges from a few meters in some areas overlying mare basalt flows to tens of meters over much of the highland terrain.
D.S. Mckay, D.W. Ming
openaire   +1 more source

Solar 3D printing of lunar regolith

Acta Astronautica, 2018
The authors demonstrated the feasibility of sintering lunar regolith layer-by-layer solely using concentrated sunlight. First trials using actual concentrated sunlight led to an inhomogeneous sintering of individual layers of lunar regolith simulant, due
Alexandre Meurisse, Matthias Šperl
exaly   +2 more sources

On the depth of the lunar regolith

The Moon, 1970
The 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 ...
openaire   +1 more source

The porosity of the upper lunar regolith

Icarus, 2016
Abstract The porosity of the upper centimeter or so of the lunar regolith strongly affects several properties that are commonly studied remotely. Hence, it is important to determine its value. We have reanalyzed the data of Ohtake et al. (Ohtake et al. [2010]. Space Sci.
Bruce Hapke, Hiroyuki Sato
openaire   +1 more source

Isotopic Variability of Nitrogen in Lunar Regolith

Science, 2001
Hashizume 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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Lunar Regolith Particles In Outposts

AIAA SPACE 2009 Conference & Exposition, 2009
The US, India, China, Japan, and Europe plan for future crewed lunar missions. While mission architecture may be superficially similar to the American Apollo program of the 1960s and 1970s, future missions will vary considerably from that precedent in duration and complexity.
François Lévy, Constance Adams, Georgi Petrov   +2 more
openaire   +1 more source

Noble gases in the lunar regolith

Chinese Journal of Geochemistry, 2003
The 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
openaire   +1 more source