منابع مشابه
Migration of interplanetary dust.
We numerically investigate the migration of dust particles with initial orbits close to those of the numbered asteroids, observed trans-Neptunian objects, and comet Encke. The fraction of silicate asteroidal particles that collided with the Earth during their lifetime varied from 11% for 100 micron particles to 0.008% for 1 micron particles. Almost all asteroidal particles with diameter d >/= 4...
متن کاملInterplanetary Dust Community
Imagine a box filled with particles from hundreds of thousands of small bodies throughout the solar system, including asteroids, comets, Trojans, Centaurs, KBOs and even from other stars. Each particle contains information about the object from which it came and the space environment through which it has traveled. Largely collected near the Earth’s orbit and on the Earth itself, this box of par...
متن کاملIon Bombardment of Interplanetary Dust
The recent discovery of ion tracks in interplanetary dust and the increasing evidence for carbon and carburized materials in these objects are strongly suggestive that chemical processing by energetic charged-particle bombardment has occurred during the dust lifetimes. The track density gives a measure of the total ion fluence experienced by the grains. We use this information and laboratory da...
متن کاملGeo Debris and Interplanetary Dust: Fluxes and Charging Behavior
In September 1996, a dust/debris detector: GORID was launched into the geostationary (GEO) region as a piggyback instrument on the Russian Express-2 telecommunications spacecraft. The instrument began its normal operation in April 1997 and ended its mission in July 2002. The goal of this work was to use GORID’s particle data to identify and separate the space debris to interplanetary dust parti...
متن کاملCircumstellar aluminum oxide and silicon carbide in interplanetary dust particles
A systematic NanoSIMS isotope imaging study of sub-micrometer phases in interplanetary dust particles (IDPs) has led to the discovery of two presolar grain types that previously were observed only in primitive meteorites. A 350 · 600 nm Al2O3 grain has a large O enrichment and a slight O depletion, as well as a Mg excess due to the decay of extinct Al. Because of its relatively large size and p...
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ژورنال
عنوان ژورنال: Transactions of the International Astronomical Union
سال: 1985
ISSN: 0251-107X
DOI: 10.1017/s0251107x00006349