interplanetary dust


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Related to interplanetary dust: Interstellar dust

interplanetary dust

(in-ter-plan -ĕ-tair-ee) The huge doughnut-shaped cloud of dust particles that orbit the Sun and have been produced mainly by the decay of the major comets such as Halley, Encke, Mellish, and Swift–Tuttle. The mass influx to this cloud is typically 200 kg per second. Dust particles in the cloud are continually colliding with each other, and the small debris from these collisions is then influenced by the Poynting–Robertson effect and starts to spiral into the Sun. Particles with radii less than about 10–6 m can be blown out of the Solar System because the force exerted on them by radiation pressure exceeds the gravitational attraction of the Sun. It is thought that in general this dust cloud is in equilibrium. See also zodiacal dust cloud.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

interplanetary dust

[¦in·tər′plan·ə‚ter·ē ′dəst]
(astronomy)
Dust particles between the planets.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Interplanetary dust, dust that has come from comets, asteroids, and leftover debris from the birth of the solar system, continually rains down on the Earth and other Solar System bodies.
Researchers have found a new mineral within an interplanetary dust particle.
They spent the last six months gigging, ahead of the release of EP Motions Of Interplanetary Dust and a second album coming soon.
The chronograph can detect sunlight that has been reflected by nearby objects, usually interplanetary dust or gas, but occasionally comets or planets.
When scientists try to measure the intensity of the optical background from Earth, for instance, the faint light from distant galaxies is polluted by the brightness of sunlight reflected off interplanetary dust in the inner solar system.
TEHRAN (FNA)- Researchers have discovered that interplanetary dust particles could deliver water and organics to the Earth and other terrestrial planets.
Another possible source of water would be a steady rain of small interplanetary dust particles onto Jupiter.
The zodiacal light is sunlight scattering by interplanetary dust grains gradually spiraling their way toward the Sun.
The latter section includes chapters on surface characteristics of transneptunian objects and centaurs from photometry and spectroscopy, interplanetary dust complex and comets, and laboratory experiments.
Louis and Lawrence Livermore (Calif.) National Laboratory analyzed an interplanetary dust particle collected by a NASA aircraft from Earth's stratosphere, they discovered organic material older than the solar system.
Washington, March 6 ( ANI ): A new experiment simulating conditions in deep space has suggested that the complex building blocks of life on Earth could have been created on icy interplanetary dust and then carried to Earth, jump-starting life.

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