Results 221 to 230 of about 11,214 (263)
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Science, 1968
The evidence that the lunar soil is basaltic permits a closer estimate of its density from the radiothermal and radar data. The mean density at the surface is 0.6 ± 0.2 gram per cubic centimeter, increasing to 1.0 gram per cubic centimeter at a depth of a few centimeters; still higher densities at depths of up to meters are implied by the radar ...
M. J. Campbell, J. Ulrichs, T. Gold
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The evidence that the lunar soil is basaltic permits a closer estimate of its density from the radiothermal and radar data. The mean density at the surface is 0.6 ± 0.2 gram per cubic centimeter, increasing to 1.0 gram per cubic centimeter at a depth of a few centimeters; still higher densities at depths of up to meters are implied by the radar ...
M. J. Campbell, J. Ulrichs, T. Gold
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Photometry of the lunar surface during lunar eclipses
The moon and the planets, 1980The photometric observations of the lunar surface during lunar eclipses were carried out on four nights between 1972 to 1978, using the 91 cm reflector of the Dodaira Station of the Tokyo Astronomical Observatory. The photometry was performed in B-, V-, and R-colours, and arranged in accordance with the angular distance from the centre of the Earth's ...
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Thermoluminescence of the lunar surface
The Moon and the Planets, 1982Observations of the lunar luminescence are reported for a dozen of specific Moon features using the ‘line-depth’ method with a high resolution spectroscopic technique. The data indicate a variation of the Moon proper emission as a function of the phase angle which is interpreted as a proof of the thermoluminescent origin of this emission.
Marie-Lise Chanin +2 more
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American Journal of Physics, 1965
ABSTRACT Direct and indirect evidence for the nature of lunar surface materials is examined and compared with theoretical predictions. Conclusions are then drawn concerning the most probable character of these materials. It is concluded that the lunar surface is covered with a layer of rubble of highly variable thickness and block size. The rubble in
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ABSTRACT Direct and indirect evidence for the nature of lunar surface materials is examined and compared with theoretical predictions. Conclusions are then drawn concerning the most probable character of these materials. It is concluded that the lunar surface is covered with a layer of rubble of highly variable thickness and block size. The rubble in
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Nature, 1957
RECENTLY, Gold1 has discussed the origin of the lunar craters and maria. He concurs in the meteorite impact theory of the origin of the craters advocated by Baldwin2, and agrees in major conclusions on the impact of explosions with Gilvarry and Hill3. For strong reasons4, Gold argues against lava as the agent producing the smooth dark surfaces of the ...
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RECENTLY, Gold1 has discussed the origin of the lunar craters and maria. He concurs in the meteorite impact theory of the origin of the craters advocated by Baldwin2, and agrees in major conclusions on the impact of explosions with Gilvarry and Hill3. For strong reasons4, Gold argues against lava as the agent producing the smooth dark surfaces of the ...
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Icarus, 1964
Abstract As a working hypothesis it is proposed that the lunar subsurface is smooth and firm with little or no dust and that it has an overlying cloud of 0.06 mm thickness consisting of ionized accreted interplanetary particles spaced at 8 microns with radius 0.8 microns.
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Abstract As a working hypothesis it is proposed that the lunar subsurface is smooth and firm with little or no dust and that it has an overlying cloud of 0.06 mm thickness consisting of ionized accreted interplanetary particles spaced at 8 microns with radius 0.8 microns.
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Nature, 1968
IN a recent paper1 written before the flight of Surveyor V, I suggested that metallic iron, aluminium and magnesium may exist on the lunar surface as a result of the chemical reduction of the surface by atomic hydrogen accumulated from long bombardment by solar wind protons.
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IN a recent paper1 written before the flight of Surveyor V, I suggested that metallic iron, aluminium and magnesium may exist on the lunar surface as a result of the chemical reduction of the surface by atomic hydrogen accumulated from long bombardment by solar wind protons.
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Morphology of the Lunar Surface
1969In the preceding Chapters 13 and 14 we got acquainted with the methods and results of the determination of lunar coordinates, which have provided the basis for lunar mapping described in Chapter 15, and made possible a topographic description of the surface of the Moon with its almost innumerable and diverse features.
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Icarus, 1967
Abstract Lower bounds for the strength of the lunar surface have been derived from the properties necessary to provide stability of the slopes observed in Ranger 7, 8, and 9 imagery. Additional information was obtained from Luna 9 data, from hydrostatic considerations, and from laboratory tests.
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Abstract Lower bounds for the strength of the lunar surface have been derived from the properties necessary to provide stability of the slopes observed in Ranger 7, 8, and 9 imagery. Additional information was obtained from Luna 9 data, from hydrostatic considerations, and from laboratory tests.
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The origin of the lunar surface
Physics of the Earth and Planetary Interiors, 1974Abstract A mechanism is described how the lunar landscape could have originated by a chain reaction of volcanic eruptions. The mechanism consists of a sequence of three steps; surface solidification and fragmentation, gas formation and crack-wave interactions.
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