Results 181 to 190 of about 139,199 (220)

Formation of the galilean satellites in a gaseous nebula

Icarus, 1982
A model for Galilean satellite formation was analyzed in which the satellites accrete in the presence of a dense, gaseous disk-shaped nebula and rapidly form optically thick, gravitationally bound primordial atmospheres. Upper-bound temperatures expected during accretion lead to partially differentiated structures for both Ganymede and Callisto ...
Lunine, Jonathan I., Stevenson, David J.
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Eclipse spectrophotometry of the Galilean satellites

Icarus, 1979
Narrowband spectrophotometry of satellite eclipses is presented for each of the Galilean satellites. Comparing the partially eclipsed full-phase satellite disk to the uneclipsed disk can reveal colorimetric inhomogeneities on the surface. The trailing half-disk of Ganymede is slightly blue compared to the leading half-disk.
Dale W. Smith, Paul E. Johnson
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Thermal properties of the Galilean satellites

Icarus, 1973
Radiometry in the 20-micron band of eclipses of each of the four Galilean satellites of Jupiter provides information about the thermal properties of the uppermost surface layers of these bodies. Their thermal inertias are all smaller than those of the moon or of Mercury; there is no evidence for atmospheres, and where the data are of high quality ...
David Morrison, Dale P. Cruikshank
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Icy craters on the Galilean satellites?

Icarus, 1978
The high degree of echo depolarization observed for linearly polarized incident waves in the case of radar observations of Europa, Ganymede, and Callisto is consistent with a rough, icy surface. Measurements with circularly polarized waves, however, conducted in 1976 suggest that the types of surface irregularities found on the Galilean satellites must
Steven J. Ostro, Gordon H. Pettengill
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Surficial textures of the Galilean satellites

Nature, 1988
The observations of the Galilean satellites of Jupiter obtained with the IUE have been analyzed as a function of solar phase angle. By fitting the measurements to a shadowing model, comparative descriptions of the microtextures of the optically active portion of the surfaces of the satellites are derived.
Bonnie J. Buratti, Robert M. Nelson, Arthur L. Lane   +2 more
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Internal structures of the Galilean satellites

Icarus, 1981
New models for the interiors of Io, Ganymede, and Callisto are proposed. The model of Io consists of a thin, high-rigidity outer layer separated from a solid interior by a thin, molten or partially molten shell. The modulus of rigidity of the outer layer must be at least 100 times larger than that of the underlying partially molten shell.
Schubert, G., Stevenson, D. J., Ellsworth, K.   +2 more
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Strength of the lithosphere of the Galilean satellites

Icarus, 2006
Abstract Several approaches have been used to estimate the ice shell thickness on Callisto, Ganymede, and Europa. Here we develop a method for placing a strict lower bound on the thickness of the strong part of the shell (lithosphere) using measurements of topography.
K LUTTRELL, D SANDWELL
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Atlas of the Galilean Satellites

2010
Complete color global maps and high-resolution mosaics of Jupiter's four large moons – Io, Europa, Ganymede and Callisto – are compiled for the first time in this important atlas. The satellites are revealed as four visually striking and geologically diverse planetary bodies: Io's volcanic lavas and plumes and towering mountains; Europa's fissured ice ...
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Problems on the Galilean satellites of Jupiter

Celestial Mechanics, 1975
The purpose of this paper is to present a critical review of some problems concerning the dynamics of Jupiter's Galilean system of satellites. Theory, ephemeris and observation are considered.
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Galilean satellite mission concepts

Astrodynamics Conference, 1982
Post-Galileo mission concepts considered possible for satellite-intensive investigations are presented, with consideration given to single and multiple target scenarios using orbiter and lander deployments. Candidate missions that satisfy the selected science objectives are identified, and specific scenario/target combinations which fall within ...
J. SOLDNER, M. STANCATI, H. FEINGOLD
openaire   +1 more source