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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: X-rays Reveal New Black Hole in Andromeda
12 December 2012 1:00 pm
On 15 January, the XMM-Newton satellite detected a bright source of x-rays in the Andromeda galaxy (main image), 2.5 million light-years from Earth. As astronomers report online today in Nature, the x-rays arise from hot gas swirling around a black hole (radio image, inset) that tears the material from an orbiting star. The object is roughly 10 times as massive as our sun and gobbles matter at nearly the maximum possible rate. Four similarly ravenous black holes are known in the Milky Way, but dust in the galaxy's disk obscures observations; so studying the newfound beast in Andromeda may offer fresh insight into how black holes accrete material, a process that feeds the supermassive black holes powering quasars billions of light-years away.
See more ScienceShots.