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.

interplanetary dust

[¦in·tər′plan·ə‚ter·ē ′dəst]
(astronomy)
Dust particles between the planets.
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.
Brownlee, an astronomer at the University of Washington in Seattle who revolutionized the field of interplanetary dust particle research.
Their EP Motions Of Interplanetary Dust is released on February 14, and Nathan Burton (pictured) releases his EP Lucky#1 on February 21, both on Northern Ambitionof music-industry imperialism when EMI bought Mute and dropped 25% of its acts.
Researchers from the University of Hawaii -- Manoa (UHM) School of Ocean and Earth Science and Technology (SOEST), Lawrence Livermore National Laboratory, Lawrence Berkeley National Laboratory, and University of California -- Berkeley discovered that interplanetary dust particles (IDPs) could deliver water and organics to Earth and other terrestrial planets.
Another possible source of water would be a steady rain of small interplanetary dust particles onto Jupiter.
A meteor or 'shooting star' is produced when an interplanetary dust particle (meteoroid) enters the Earth's atmosphere and deflagrates, leaving a train of excited and ionized particles along its path.
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.
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.
These researchers speculate that precursors to life might have arrived on an asteroid, meteorite, comet, or even interplanetary dust (SN: 2/3/01, p.

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