From Interstellar Dust to Comet Dust and Interplanetary Particles

1989 ◽  
pp. 241-250 ◽  
Author(s):  
J. Mayo Greenberg
Keyword(s):  
Interstellar Dust ◽  
Comet Dust

scholarly journals Material Processing of Interstellar Dust in Comets

2005 ◽  
Vol 13 ◽  
pp. 485-487 ◽  
Author(s):  
Hiroshi Kimura ◽  
Ingrid Mann
Keyword(s):  
Material Processing ◽  
Interstellar Dust ◽  
Amorphous Silicate ◽  
Comet Dust

AbstractTo better understand the processing of pristine materials in comets, we compare the composition of cometary and interstellar dust. We suggest that the deficit of N in comet dust bears evidence for the processing of the organic refractory mantle of pre-solar interstellar dust, unless it arises from the protosolar disk chemistry. The amorphous silicate core, in contrast, seems to be protected against processing due to the presence of the organic refractory mantle.

scholarly journals Comet Dust: Connections with Interstellar Dust

1989 ◽  
Vol 135 ◽  
pp. 415-428
Author(s):  
R. F. Knacke
Keyword(s):  
Organic Compounds ◽  
Interstellar Dust ◽  
Interstellar Matter ◽  
Direct Connection ◽  
Isotopic Compositions ◽  
Comet Dust ◽  
The Many ◽  
Comet Halley

The Comet Halley campaigns resulted in an enormously better understanding of the composition of comets. Silicates, organic compounds, and volatile ices comprised of H2O, CO, CO2, S2, CN, and possibly CH4 and OCS occur in comet grains. These are all known or suspected constituents of interstellar dust. We review the chemical, elemental, and isotopic compositions of comet dust and compare this with interstellar matter. The many intriguing parallels suggest, but do not yet establish, a direct connection between comet dust and interstellar dust.

The interstellar dust model of comet dust constrained by 3.4 μm and 10 μm emission

1989 ◽  
Vol 9 (3) ◽  
pp. 3-11 ◽  
Author(s):  
J.M. Greenberg ◽  
N.S. Zhao ◽  
J.I. Hage
Keyword(s):  
Interstellar Dust ◽  
Comet Dust

scholarly journals From Interstellar Dust to Comet Dust and Interplanetary Particles

1989 ◽  
Vol 8 ◽  
pp. 241-250 ◽  
Author(s):  
J. Mayo Greenberg
Keyword(s):  
Solar System ◽  
Time Scales ◽  
Interstellar Dust ◽  
Morphological Structure ◽  
Side Branch ◽  
Zodiacal Light ◽  
Mean Size ◽  
Comet Dust ◽  
Light Particles

AbstractInterstellar dust is described as consisting predominantly (by mass) of tenth micron (mean size) silicate core-organic refractory mantle particles which have evolved over galactic time scales of the order of 5 billion years. These particles were incorporated into comets and asteroids in the presolar nebula 4.5 billion years ago. The fragmentation of those primitive bodies gives rise to solar system debris which shows up as comet dust, zodiacal light, IDP’s and meteorites. The chemical and morphological structure of comet dust is derived here as fluffy aggregates of interstellar dust. The chemical and morphological structure of the chondritic porous IDP’S are then derived from comet dust which has evolved in the solar system. Zodiacal light particles are interpreted as various stages between comet dust and IDP’s. Meteorites appear to be a side branch in the evolution from interstellar to solar system particles.

Laboratory and in-situ analysis of comet dust

1988 ◽  
Vol 46 ◽  
pp. 8-9
Author(s):  
D.E. Brownlee ◽  
A.L. Albee
Keyword(s):  
Electron Microscopy ◽  
Solar System ◽  
Laboratory Study ◽  
Isotopic Analysis ◽  
Building Blocks ◽  
Sem Analysis ◽  
Early Solar System ◽  
Cometary Material ◽  
Comet Dust

Comets are primitive, kilometer-sized bodies that formed in the outer regions of the solar system. Composed of ice and dust, comets are generally believed to be relic building blocks of the outer solar system that have been preserved at cryogenic temperatures since the formation of the Sun and planets. The analysis of cometary material is particularly important because the properties of cometary material provide direct information on the processes and environments that formed and influenced solid matter both in the early solar system and in the interstellar environments that preceded it.The first direct analyses of proven comet dust were made during the Soviet and European spacecraft encounters with Comet Halley in 1986. These missions carried time-of-flight mass spectrometers that measured mass spectra of individual micron and smaller particles. The Halley measurements were semi-quantitative but they showed that comet dust is a complex fine-grained mixture of silicates and organic material. A full understanding of comet dust will require detailed morphological, mineralogical, elemental and isotopic analysis at the finest possible scale. Electron microscopy and related microbeam techniques will play key roles in the analysis. The present and future of electron microscopy of comet samples involves laboratory study of micrometeorites collected in the stratosphere, in-situ SEM analysis of particles collected at a comet and laboratory study of samples collected from a comet and returned to the Earth for detailed study.

Chemical evolution of interstellar dust, comets and the origins of life

1989 ◽  
Vol 14 (2) ◽  
pp. 103-131 ◽  
Author(s):  
J. Mayo Greenberg ◽  
Nansheng Zhao ◽  
Joniek Hage
Keyword(s):  
Chemical Evolution ◽  
Interstellar Dust ◽  
Origins Of Life

PRONAOS observations of the interstellar medium: New insights on interstellar Dust

2002 ◽  
Vol 4 ◽  
pp. 9-9
Author(s):  
I. Ristorcelli ◽  
B. Stepnik ◽  
X. Dupac ◽  
A. Abergel ◽  
J. P. Bernard ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Interstellar Dust
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