Results 171 to 180 of about 14,650 (219)

Dust - Interplanetary And Interstellar

1973
In the physical universe, perturbative clumpings of material include the entire spectrum of sizes from the subatomic to the metagalaxy. The span of masses from the electron to our Galaxy goes from 10-27 to 1044 gm, or 71 powers of 10. Between these two extremes, Nature displays a comprehensive array to the astronomer, as listed in Table 6-I.
F.E. Roach, Janet L. Gordon
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Reports Refractory Interplanetary Dust Particles

Science, 1987
Criteria are described by which refractory interplanetary dust particles (IDPs) can be differentiated from the products of spacecraft debris. These criteria have been used to discover and characterize IDPs that are composed predominantly of refractory phases. Two of these particles contain hibonite, perovskite, spinel, refractory glass, and a melilite;
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Meteors and Interplanetary Dust

1977
The business meeting was called to order at 10.00 on 28 August 1976. Approximately 30 members and guests were present. The President reported with regret the deaths of two commission members: Professor Astapovich of the USSR and Professor Olivier of USA. The meeting stood in silence for a few moments in their memory.
Edith A. Müller, Arnost Jappel
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Physics of Interplanetary and Interstellar Dust

Space Science Reviews, 1996
Observations of dust in the solar system and in the diffuse interstellar medium are summarized. New measurements of interstellar dust in the heliosphere extend our knowledge about micron-sized and bigger particles in the local interstellar medium. Interplanetary grains extend from submicron- to meter-sized meteoroids. The main destructive effect in the
Eberhard Gr�n, Jiri Svestka
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Motion of the Interplanetary Dust Cloud

Nature, 1970
THERE have recently been several attempts1–3 to observe the motion of the interplanetary dust cloud by measuring the Doppler shift of the Hβ Fraunhofer line in the spectrum of the zodiacal light. From the variation of the Doppler shift with elongation it is possible in principle4 to deduce the way in which the particle number density varies with ...
J F, James, M J, Smeethe
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Interplanetary Dust Particles

2007
The ways of establishing the extraterrestrial nature of different subsets of interplanetary dust collected in the stratosphere by high-altitude aircraft are discussed. Consideration is given to microanalytic techniques which make it possible to obtain detailed experimental information on the mineralogical and petrographic characteristics, the mid-IR ...
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Radioactivity in interplanetary dust

Icarus, 1963
Abstract Most of the radioactivity in interplanetary dust in the region of the Earth's orbit results from interactions with solar protons. The most abundant nuclides having half-lives longer than a few hours in a dust of chondritic composition are Co 56 , Fe 55 , Al 26 , Mn 53 , Co 55 , C 14 , Na 22 , and Co 57 .
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Interplanetary dust dynamics

Icarus, 1986
Bo Å.S. Gustafson, Nebil Y. Misconi
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Interplanetary Dust: Properties and Interactions of Interplanetary Dust.

Science, 1986
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Meteors and Interplanetary Dust

1994
The organization of Commission 22 was disrupted by the untimely and much-lamented death of our President, Jan Stohl, in 1993 March. An appreciation of Jan appeared in the newsletter of the commission issued in 1993 April, and obituaries have been published in various other places.
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