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 ?
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.
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.
As Mars revolves around the Sun, it is constantly bombarded by very small meteors and interplanetary dust particles, which have plenty of organic compounds in them, Pavlov said.
The materials could have hitched a ride to Earth on comets, meteorites, or interplanetary dust.
Since meteorites and interplanetary dust from space, which carry along carbonaceous compounds, continuously impact on the Martian surface, the researchers conclude that high-energy UV radiation triggers the release of methane from the meteorites.
The issue of how interplanetary dust affects Earth gained prominence after a pair of scientists hypothesized that waves of space particles triggered the last 10 ice ages (SN: 10/4/97, p.
Furthermore, the rings have been collecting interplanetary dust ever since they were formed.
Before deducing the extragalactic glow, Hauser's team had to estimate and subtract two local infrared signals--radiation from interplanetary dust in the solar system and from dust and stars within the Milky Way galaxy.
Thousands of tons of interplanetary dust particles (IDPs) enter the atmosphere each year.
Studies of seafloor sediments suggest that interplanetary dust may have triggered the ice ages (152: 220).

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