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5 December 2013 11:26 am ,
Vol. 342 ,
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
Thousands of scientists in the Russian Academy of Sciences (RAS) are about to lose their jobs as a result of the...
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
Snake venoms are remarkably complex mixtures that can stun or kill prey within minutes. But more and more researchers...
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
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Video: Astronomers Solve Mystery of the Leo Ring
30 June 2010 1:02 pm
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Credit: CEA-Léo Michel-Dansac (CNRS CNRS/INSU Université Lyon 1)
In the vastness of the universe, collisions between galaxies are surprisingly common. In this particular cosmic train wreck between two galaxies located about 38 million light-years away, the result apparently was the creation of a gigantic circle of gas. For nearly 30 years, astronomers have wondered what formed the so-called Leo ring—named because the galaxies are located within the constellation Leo. Observations in infrared light had suggested the ring was composed of cold primordial gas left over from the big bang. But a new study, to be reported in The Astrophysical Journal Letters, used visible light. In the images astronomers found evidence of starmaking within the ring—something not possible in primordial gas clouds. Then a computer simulation based on the new observations solved the mystery: about 1 billion years ago, a violent encounter between the two galaxies ripped out their starmaking gas and spread it as a ring some 650,000 light-years wide.
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