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 Columbus OH (SPX) Sep 01, 2009 
As scientists attempt to learn more about how galaxies evolve, an open question has been whether collisions with our dwarf galactic neighbors will one day tear apart the disk of the Milky Way. That grisly fate is unlikely, a new study now suggests. While astronomers know that such collisions have probably occurred in the past, the new computer simulations show that instead of destroying a ... read more
Greenbelt MD (SPX) Sep 01, 2009The dust-filled disks where new planets may be forming around other stars occasionally take on some difficult-to-understand shapes. Now, a team led by John Debes at NASA's Goddard Space Flight Center in Greenbelt, Md., finds that a star's motion through interstellar gas can account for many of them. "The disks contain small comet- or asteroid-like bodies that may grow to form planets," Deb ... more
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Boulder CO (SPX) Sep 01, 2009Subtle connections between the 11-year solar cycle, the stratosphere, and the tropical Pacific Ocean work in sync to generate periodic weather patterns that affect much of the globe, according to research appearing in the journal Science. The study can help scientists get an edge on eventually predicting the intensity of certain climate phenomena, such as the Indian monsoon and tropical Pacific ... more 
Bonn, Germany (SPX) Sep 01, 2009Our sun does not radiate evenly. The best known example of radiation fluctuations is the famous 11-year cycle of sun spots. Nobody denies its influence on the natural climate variability, but climate models have, to-date, not been able to satisfactorily reconstruct its impact on climate activity. Researchers from the USA and from Germany have now, for the first time, successfully simulated ... more  
Huntsville AL (SPX) Sep 01, 2009Magnetic reconnection could be the Universe's favorite way to make things explode. It operates anywhere magnetic fields pervade space--which is to say almost everywhere. On the sun magnetic reconnection causes solar flares as powerful as a billion atomic bombs. In Earth's atmosphere, it fuels magnetic storms and auroras. In laboratories, it can cause big problems in fusion reactors. It's ... more |
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Moffett Field CA (SPX) Aug 28, 2009Cosmic rays pour down on Earth like a constant rain. We don't much notice these high-energy particles, but they may have played a role in the evolution of life on our planet. Some of the mass extinctions identified in the fossil record can be linked to an asteroid impact or increased volcanism, but many of the causes of those ancient die-offs are still open for debate. "There may have been ... more  
Newcastle-Under-Lyme, England (UPI) Aug 27, 2009 British scientists are trying to determine why a Jupiter-style planet orbiting close to its sun has not spiraled into the star and burned up. Wasp-18b is so close to the star Wasp-18 that it completes its orbit in less than an Earth-length day, astrophysicists at Keele University in Staffordshire say. In an article in Nature, they say standard astronomical theories hold the planet shoul ... more  
Cambridge MA (SPX) Aug 28, 2009Finding a comet can be a quick way to get some immortal fame - and a little spending money, as well. An annual award of several thousand dollars for discoveries of comets by amateur astronomers has just been announced for five individuals in five different countries. The Central Bureau for Astronomical Telegrams (CBAT) - operated by the Smithsonian Astrophysical Observatory (SAO) in Cambri ... more |
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