The moon

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Saturn's ringlets
The moon - Tập 26 - Trang 97-100 - 1982
J. A. Bastin, D. H. Smith
This paper suggests that Saturn's magnetic field is, in part, responsible for the very fine-scale radial features, or ringlets, seen in the ring-system. The planet's dipole field interacts with slight radial variations in plasma density, and the operation of an instability segregates the magnetic flux and plasma in the ring-plane into narrow alternating zones. We suggest that this mechanism may ac...... hiện toàn bộ
Evolutionary tracks of the terrestrial planets
The moon - Tập 39 - Trang 207-214 - 1987
Takafumi Matsui, Yutaka Abe
On the basis of the model proposed by Matsui and Abe, we will show that two major factors — distance from the Sun and the efficiency of retention of accretional energy — control the early evolution of the terrestrial planets. A diagram of accretional energy versus the optical depth of a proto-atmosphere provides a means to follow the evolutionary track of surface temperature of the terrestrial pla...... hiện toàn bộ
Criteria for the detection of lunar cryptomaria
The moon - Tập 69 - Trang 141-172 - 1995
Irene Antonenko, James W. Head, John F. Mustard, B. Ray Hawke
Cryptomaria are mare basalt deposits hidden or obscured by superposed higher albedo material or variations in albedo. They represent a record of the earliest mare volcanism, and may be a significant volumetric contribution to the volcanic and magmatic history of the Moon. In order to assess their global distribution and significance, criteria for the identification of cryptomaria are developed and...... hiện toàn bộ
The expansion of negative powers of the mutual distance between two planets
The moon - Tập 43 - Trang 197-200 - 1988
Osman M. Kamel, Adel S. Soliman
An outline of a new method is given to obtain the expansion of δ−S by the method of W. M. Smart, using Taylor theorem and neglecting powers higher than the fourth in the eccentricity and inclination.
Geochemistry of the Venera 8 material demonstrates the presence of continental crust on Venus
The moon - - 1990
O. V. Nikolayeva
Distinction in the Interplanetary Characteristics of Accelerated and Decelerated CMEs/Shocks
The moon - Tập 122 - Trang 73-82 - 2018
K. Suresh, A. Shanmugaraju, Y.-J. Moon
A set of 58 Coronal Mass Ejections (CMEs) with different kinematics near the sun in LASCO Field of view (FOV) is classified into two groups (i) CMEs which are accelerating (group-I) and (ii) CMEs which are decelerating (group-II). We analyze their interplanetary propagation characteristics to study the distinction between these two groups of events. Some of the following deviations are noted betwe...... hiện toàn bộ
Diffuse scattering of radar on the surface of Venus: Origin and implications for the distribution of soils
The moon - Tập 42 - Trang 133-149 - 1988
D. L. Bindschadler, J. W. Head
Previous analysis of PV altimeter data has shown that ~25% of the surface of Venus is characterized by low values of reflectivity, interpreted as being due to the presence of porous materials such as soils. However, examination of a corrected reflectivity data set in combination with PV altimeter data suggests that no more than 5% of the surface of Venus is covered by soils more than several to te...... hiện toàn bộ
Determination of secular terms in general planetary theory
The moon - Tập 43 - Trang 271-273 - 1988
Osman M. Kamel
A method to calculate secular terms of the two parts of the planetary disturbing function— when it is expressed in terms of the true anomalies or the eccentric anomalies instead of the mean anomalies - is described. Also an alternative method is outlined.
Thermal instabilities and the formation of lunar maria
The moon - Tập 8 - Trang 335-339 - 1973
J. A. Bastin
A model is discussed for a possible type of thermal instability in the outer layers of the Moon. An estimate is made for the temperature differential driving the instability. It is suggested that such an instability may have been involved in the formation of the lunar maria.
SPECTROSCOPY OF A GEMINID FIREBALL: ITS SIMILARITY TO COMETARY METEOROIDS AND THE NATURE OF ITS PARENT BODY
The moon - Tập 95 - Trang 375-387 - 2005
J. M. TRIGO-RODRíGUEZ, J. LLORCA, J. BOROVIČKA, J. FABREGAT
A detailed analysis of a photographic spectrum of a Geminid fireball obtained in December 14, 1961 at the Ondrejov Observatory is presented. We have computed a synthetic spectrum for the fireball and compared it with the observed spectrum assuming chemical equilibrium in the meteor head. In this way we have determined relative chemical abundances in meteor vapors. Comparing the relative chemical a...... hiện toàn bộ
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