Dust
hideDust is a general name for minute solid particles with diameters less than 20 thou (500 micrometers). Particles in the atmosphere arise from various sources such as soil dust lifted up by wind, volcanic eruptions, and pollution. Dust in homes, offices, and other human environments consist primarily of human skin cells, but also contain small amounts of plant pollen, human and animal hairs, textile fibers, paper fibers, minerals from outdoor soil, and many other materials which may be found in the local environment.
For more information about Dust, read the full article at
Wikipedia.
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News tagged with dust
SKorea to plant trees in China to reduce 'yellow dust'
Nov 04, 2009 |
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The Seoul city government will help fund a tree-planting project in a Chinese desert to reduce the amount of harmful "yellow dust" blowing over South Korea, officials said Wednesday.
Texas A&M prof to predict weather on Mars
Space & Earth / Space Exploration
Nov 04, 2009 |
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Is there such a thing as "weather" on Mars? There are some doubts, considering the planet's atmosphere is only 1 percent as dense as that of the Earth. Mars, however, definitely has clouds, drastically low temperatures and ...
'Ultra-primitive' particles found in comet dust
Space & Earth / Space Exploration
Nov 02, 2009 |
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Dust samples collected by high-flying aircraft in the upper atmosphere have yielded an unexpectedly rich trove of relicts from the ancient cosmos, report scientists from the Carnegie Institution. The stratospheric ...
Answering that age-old lament: Where does all this dust come from?
Oct 28, 2009 |
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Where does it come from? Scientists in Arizona are reporting a surprising answer to that question, which has puzzled and perplexed generations of men and women confronted with layers of dust on furniture and ...
Orionids Meteor Shower Lights Up the Sky
Space & Earth / Space Exploration
Oct 21, 2009 |
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Earth is currently passing through a stream of debris from Halley's Comet, lighting up the night sky with the "fireworks" of the annual Orionids meteor shower.
Astronomers seek to explore the cosmic Dark Ages
Oct 15, 2009 |
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No place seems safe from the prying eyes of inquisitive astronomers. They've traced the evolution of the universe back to the "Big Bang," the theoretical birth of the cosmos 13.7 billion years ago, but there's still a long ...
Moon crash: Public yawns, scientists celebrate
Space & Earth / Space Exploration
Oct 10, 2009 |
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(AP) -- NASA's great lunar fireworks finale fizzled. After gearing up for the space agency's much-hyped mission to hurl two spacecraft into the moon, the public turned away from the sky Friday anything but ...
NASA probes hit moon twice (Update 2)
Space & Earth / Space Exploration
Oct 09, 2009 |
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NASA's Lunar Crater Observation and Sensing Satellite, or LCROSS, created twin impacts on the moon's surface early Friday in a search for water ice. Scientists will analyze data from the spacecraft's instruments ...
Electrostatic surface cleaning
Oct 07, 2009 |
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It's often the little things that count in industrial manufacturing processes. Particles less than half the diameter of a hair in size can significantly impair quality in production. For example, there should ...
Largest Ring Around Saturn Discovered
Oct 07, 2009 |
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(PhysOrg.com) -- NASA's Spitzer Space Telescope has discovered an enormous ring around Saturn -- by far the largest of the giant planet's many rings.
Do dust particles curb climate change?
Space & Earth / Earth Sciences
Oct 06, 2009 |
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(PhysOrg.com) -- A knowledge gap exists in the area of climate research: for decades, scientists have been asking themselves whether, and to what extent man-made aerosols, that is, dust particles suspended ...
Tracing ultra-fine dust
Oct 05, 2009 |
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Limit values for fine dust emissions are based on total particle weight. It is the ultra-fine particles, however, that are particularly harmful to health. A new technique separates them by size and identifies ...
Heart of a galaxy emits gamma rays
Oct 02, 2009 |
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(PhysOrg.com) -- Quite a few distant galaxies turn out to be cosmic delivery rooms. Large numbers of massive stars are born in the hearts of these starburst galaxies, and later explode as supernovae. In the ...
The discovery of new Earths is imminent, UD astronomer says
Sep 28, 2009 |
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(PhysOrg.com) -- Harry Shipman, Annie Jump Cannon Professor of Physics and Astronomy at the University of Delaware, told the audience for his lecture, “Seeking New Planets,” on Saturday evening, Sept. 26, ...
The trilogy is complete -- GigaGalaxy Zoom Phase 3
Sep 28, 2009 |
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The newly released image extends across a field of view of more than one and a half square degree — an area eight times larger than that of the full Moon — and was obtained with the Wide Field Imager attached ...
