Primordial matter in the outer solar system: A study of its chemical composition from remote spectroscopic analysis

1984 ◽  
Vol 38 (1-2) ◽  
Author(s):  
Th�r�se Encrenaz
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
Spectroscopic Analysis ◽  
Outer Solar System ◽  
System A

scholarly journals Neptune’s Triton: A Moon Rich in Dry Ice and Carbon?

1990 ◽  
Vol 8 (04) ◽  
pp. 364-367 ◽  
Author(s):  
A. J. R. Prentice
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
Catalytic Synthesis ◽  
Outer Solar System ◽  
Solid Carbon ◽  
Convective Turbulence ◽  
Water Ice ◽  
Large Satellite ◽  
Unique Composition ◽  
Crucial Test

AbstractThe encounter of the spacecraftVoyager 2with Neptune and its large satellite Triton in August 1989 will provide a crucial test of ideas regarding the origin and chemical composition of the outer solar system. In this pre-encounter paper we quantify the possibility that Triton is a captured moon which, like Pluto and Charon, originally condensed as a major planetesimal within the gas ring that was shed by the contracting protosolar cloud at Neptune’s orbit. Ideas of supersonic convective turbulence are used to compute the gas pressure, temperature and rate of catalytic synthesis of CH4, CO2and solid carbon within the protosolar cloud, assuming that all C is initially present as CO. The calculations lead to a unique composition for Triton, Pluto, and Charon: each body consists of, by mass, 18.5% solid CO2ice, 4% graphite, 0.5% CH4ice, 29% methanated water ice and 48% anhydrous rock. This mix has a density consistent with that of the Pluto-Charon system and yields a predicted mean density for Triton of 2.20±0.05 g cm−3, for satellite radius equal to 1750 km.

The outer solar system: A program for exploration

Icarus ◽  
1970 ◽  
Vol 13 (1) ◽  
pp. 157-158
Author(s):  
Carl Sagan
Keyword(s):  
Solar System ◽  
Outer Solar System ◽  
System A

Design and Science Instrumentation of an Unmanned Vehicle for Sample Return from the Asteroid Eros

1971 ◽  
Vol 12 ◽  
pp. 543-560 ◽  
Author(s):  
H. F. Meissinger ◽  
E. W. Greenstadt
Keyword(s):  
Crystal Structure ◽  
Chemical Composition ◽  
Solar System ◽  
Surface Texture ◽  
Magnetic Characteristics ◽  
Sample Return ◽  
Surface Sample ◽  
System A ◽  
Structure Surface ◽  
Fragmentation Processes

Unmanned missions to the asteroids have been proposed and investigated as part of the overall plan of exploration of the solar system. A principal incentive for landing on an asteroid and retrieving a surface sample for return to Earth is the expectation that detailed laboratory analysis of the sample material’s chemical composition, crystal structure, surface texture, magnetic characteristics, radioactive state, and age can provide essential clues, not available by other means, to the origin of asteroids and possibly the history and formative processes of the solar system (Alfvén and Arrhenius, 1910a,b; Bratenahl; Friedlander and Vickers, 1964; IIT Research Institute, 1964; Öhman, 1963). The results may indicate, for example, to what extent accretion or fragmentation processes have been involved in the formation of asteroids.

scholarly journals OSS (Outer Solar System): a fundamental and planetary physics mission to Neptune, Triton and the Kuiper Belt

2012 ◽  
Vol 34 (2) ◽  
pp. 203-242 ◽  
Author(s):  
B. Christophe ◽  
L. J. Spilker ◽  
J. D. Anderson ◽  
N. André ◽  
S. W. Asmar ◽  
...  
Keyword(s):  
Solar System ◽  
Kuiper Belt ◽  
Outer Solar System ◽  
System A

scholarly journals The opposition effect in the outer Solar system: A comparative study of the phase function morphology

2009 ◽  
Vol 57 (11) ◽  
pp. 1282-1301 ◽  
Author(s):  
Estelle Déau ◽  
Luke Dones ◽  
Sébastien Rodriguez ◽  
Sébastien Charnoz ◽  
André Brahic
Keyword(s):  
Solar System ◽  
Comparative Study ◽  
Phase Function ◽  
Outer Solar System ◽  
Opposition Effect ◽  
System A

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

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