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24 April 2014 11:45 am ,
Vol. 344 ,
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...
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...
- 24 April 2014 11:45 am , Vol. 344 , #6182
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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.