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6 March 2014 1:04 pm ,
Vol. 343 ,
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
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ScienceShot : Odd Galaxy Raises Many Questions
12 August 2010 1:19 pm
Something unusual and mysterious has happened to NGC 4696. Located about 150 million light-years away in the constellation Centaurus, the object is an elliptical galaxy. That should mean a previous collision with another galaxy ripped off its spiral arms, stripped away most of its interstellar gas, and condemned it to a slow death. But NGC 4696 has sprouted something never seen on another galaxy: a huge swirl of dust that stretches for tens of thousands of light-years and whips back around like a question mark. Observations by the Hubble Space Telescope released today show another first: filaments of ionized, or charged, hydrogen gas branching from the dust swirl. And views in x-ray light (not shown) reveal super-powerful jets of matter squirting from the galaxy's central black hole at nearly the speed of light. Together, these features show that NGC 4696 is a galaxy like no other. Astronomers suspect that the filament resulted from some sort of gravitational interaction with another galaxy, possibly a collision.
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