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10 April 2014 11:44 am ,
Vol. 344 ,
Balkan endemic kidney disease surfaced in the 1950s and for decades defied attempts to finger the cause. It occurred...
The Pyrenean ibex, an impressive mountain goat that lived in the central Pyrenees in Spain, went extinct in 2000. But a...
Tight budgets are forcing NASA to consider turning off one or more planetary science projects that have completed their...
Ebola is not a stranger to West Africa—an outbreak in the 1990s killed chimpanzees and sickened one researcher. But the...
In an as-yet-unpublished report, an international panel of geoscientists has concluded that a pair of deadly...
Tropical disease experts tried and failed before to eradicate yaws, a rare disfiguring disease of poor countries. Now,...
Since 2002, researchers have reported that agricultural communities in the hot and humid Pacific Coast of Central...
- 10 April 2014 11:44 am , Vol. 344 , #6180
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ScienceShot: Built by Black Holes?
2 February 2012 4:10 pm
Scientists have long speculated that supermassive black holes, which have large gravitational fields and are suspected to reside in the centers of many large galaxies, disrupt nearby clouds of dust and gas, thereby hindering the formation of new stars. But new images of the galaxy Centaurus A (left) taken with cameras onboard the Hubble Space Telescope suggest that black holes can play a constructive role as well, researchers report in Monthly Notices of the Royal Astronomical Society. A close-up of a 3000-light-year-long filament of ionized gas in the galaxy (green smudges at right, and boxed area at left) reveals a cluster of young stars (bright, blue-white dots at bottom) at the end of the filament nearest the galaxy's central black hole. The researchers suggest that those fledgling stars, estimated to be less than 10 million years old, formed when a jet of material driven from the black hole slammed into the gas cloud, compressing and heating it to the point where the stars ignited.
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