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24 April 2014 11:45 am ,
Vol. 344 ,
The National Institutes of Health is revising its "two strikes" rule, which allowed researchers only one chance to...
By stabilizing the components of retromers, molecular complexes that act like recycling bins in cells, a recently...
Fossil fuels power modern society by generating heat, but much of that heat is wasted. Semiconductor devices called...
Researchers are gaining insights into what made Supertyphoon Haiyan so powerful and devastating through post-storm...
Millions around the world got a first-hand look at what it was like to be in Tacloban while it was pummeled by...
Major climate data sets have underestimated the rate of global warming in the last 15 years owing largely to poor data...
The tsetse fly is best known as the vector for the trypanosome parasites that cause sleeping sickness and a disease in...
- 24 April 2014 11:45 am , Vol. 344 , #6182
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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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