Comet Dust Yields Surprises About Universe
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By Sandi Doughton, Seattle Times  Dec. 15--University of Washington astronomer Don Brownlee expected surprises from the pinch of comet dust collected by the Stardust spacecraft.   But he didn't foresee such a shake-up.
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NASA and university astronomers are eagerly awaiting  the launch of a&nbsp;space probe bound to collide with a comet and give  researchers a glimpse inside the solar system's&nbsp;icy  wanderers.&nbsp;
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A bunch of rowdy comets are colliding and kicking up dust around a dead star, according to new observations from NASA's Spitzer Space Telescope. The dead star lies at the center of the much-photographed Helix nebula, a shimmering cloud of gas with an eerie resemblance to a giant eye.
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The outer solar system may not be a cemetery full of dead, frozen bodies, suggest new observations of a large object called Quaoar.
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It may take much longer than scientists have thought for violent turbulence to turn grains of space dust into new planets.
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Hollow spheres found in a primordial meteorite could yield clues to the origin of life on Earth.
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By ALICIA CHANG  SAN FRANCISCO - Detailed observations from the first comet samples returned to Earth are debunking some of science's long-held beliefs on how the icy, celestial bodies form.
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The universe has a huge hole in it that dwarfs anything else of its kind. The discovery caught astronomers by surprise.
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Astronomers find the evidence that ties the structure of the present Universe with ripples in the density of matter just after the Big Bang.
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For the first time, scientists have found rings of dust around planet-bearing stars - an important confirmation of theories about how planets form, NASA announced Thursday.
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A U.S.-led team of scientists says the samples of comet dust returned to Earth early this year suggest some cosmic theories may have to be reconsidered.  The samples were collected by the National Aeronautics and Space Administration's Stardust mission that was launched in 1999.
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For the first time, NASA scientists have observed planet-containing solar systems with disks of dust orbiting their central stars, astronomers announced Thursday.
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The Spitzer and Hubble Space Telescopes each have found dusty disks around sun-like stars. Finding such rings of dusty debris around stars the size of the sun is difficult, because they are fainter and harder
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New observations of dust around young stars suggests collisions of large asteroid-like objects and fledgling planets are frequent.
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In this artist&#39;s concept released by NASA, a ring of dusty debris is seen around a star. NASA&#39;s Spitzer Space Telescope found rings of dust around planet-bearing stars, an important confirmation of theories
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The observations by NASA&#39;s Spitzer Space Telescope, linking with previous data from European satellites, demonstrated that the dust clouds in these proto-planetary disks did not steadily fade away over a few million years.
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Planet-building is dusty work, and now two space telescopes have captured images of cosmic construction materials: disks of dust circling stars about the same size as our sun.