Results 171 to 180 of about 4,053,390 (205)

Topographic Features of the Lunar Maria and Basins

Solar System Research, 2021
More than 70 topographic profiles of 34 large lunar maria and basins were constructed and studied in order to obtain quantitative values of the parameters that characterize these formations, to identify patterns and features of their relief. The dependence of the absolute height of the bottom and the depth of the basins on latitude, longitude, size and
Zh. F. Rodionova, A. Yu. Zharkova, E. A. Grishakina, V. V. Shevchenko   +3 more
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The lunar maria

Planetary and Space Science, 1961
Abstract The hypothesis proposed by Gold that the lunar maria are composed of dust is shown to give a detailed explanation of the present appearance of the maria. It is also shown that many bright rays may not have the extent and intensity as they had when they were formed.
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Origin of the Lunar Craters and Maria

Nature, 1959
RECENT observations by Kozyrev (private communication) of transient emission bands of the carbon molecule in the spectrum of the central peak of the lunar crater Alphonsus have strikingly re-opened the age-old problem of the origin of these most characteristic landmarks of the lunar surface; and the dilemma between the volcanic and impact phenomena ...
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Lunar ring structures and the nature of the maria

Planetary and Space Science, 1968
Abstract Data from Lunar Orbiter and Surveyor probes are used in an examination of specific, low walled lunar rings to show that they are recent volcanic structures. The alternative hypothesis that these ‘elementary’ rings represent old, partially buried craters is challenged. Their observed distribution and the mechanism of formation deduced for
J.E. Guest, G. Fielder
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Galileo imaging observations of lunar maria and related deposits

Journal of Geophysical Research: Planets, 1993
The Galileo spacecraft imaged parts of the western limb and far side of the Moon in December 1990. Ratios of 0.41/0.56 μm filter images from the Solid State Imaging (SSI) experiment provided information on the titanium content of mare deposits; ratios of the 0.76/0.99 μm images indicated 1 μm absorptions associated with Fe2+ in mafic minerals.
Greeley, R., Kadel, S.D., Williams, D.A., Gaddis, L.R., Head, J.W., McEwen, A.S., Murchie, S.L., Nagel, E., Neukum, G., Pieters, C.M., Sunshine, J.M., Wagner, R., Belton, M.J.S.   +12 more
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Volcanic features of the nearside equatorial lunar maria

Journal of the Geological Society, 1976
A map is presented of the distribution of volcanic features in the lunar maria between longitudes 50°E. and 100°W, and latitudes 50°N. and S. Flood basaltic flows predominate, and where individual flow units can be identified they may be hundreds of kilometres long.
J. E. GUEST, J.B. MURRAY
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The ages of the lunar maria and the filling of the mare basins

Physics of the Earth and Planetary Interiors, 1977
Abstract The age discrepancy between lunar highlands and mare is examined in terms of a hydrostatic head model incorporating an impact crater being fed continuously from depth with basaltic magma. It is shown that if the age difference is attributed to the filling time of the impact basin, the dimensions of the volcanic feeder conduits are of the ...
Davies, P.A., Stephenson, A.
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Mensuration and Isostasy of Lunar Mascons and Maria

Nature, 1969
The theory that mascons have been formed by the partial filling of impact craters now leads to the conclusion that they are isostatically in equilibrium with the rocks beneath.
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Modelling of temperatures of selected points in lunar maria

The Moon and the Planets, 1980
The purpose of this paper is to propose a numerical model representing the brightness temperature of ten selected sites of the Moon as measured in CERGA. A theoretical approach is proposed in which the temperature is expressed as a function of the local zenith distance of the Sun and a quantity depending upon the local zenith distance of the observer ...
J. Gay, J. -L. Falin, J. Kovalevsky, J. -P. Corteggiani, M. -T. Dumoulin   +4 more
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Evidence for isostasy in the lunar mascon Maria

The Moon, 1976
The pronounced positive gravity anomalies in the lunar circular maria imply lack of isostatic compensation of the lunar mascons. This lack of isostasy is hard to reconcile with the rheological properties of the lunar crust. Analysis of the negative ring anomalies that appear to surround the major positive gravity peaks indicates that associated with ...
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