Astronomy and Astrophysics

Black hole activity deduced from reflected X-rays

The supermassive black hole in the center of our galaxy, known as Sagittarius A*, is pretty quiet for a black hole. It does however flare up from time to time, when material is captured, as can be seen in ...

dateOct 03, 2014 in Astronomy
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The Dragon clash

NGC 5907 is a spiral galaxy lying in the Dragon constellation, showing extraordinary large loops and currents of stars in its surrounding halo. According to researchers, it could have been formed through a ...

dateFeb 23, 2012 in Astronomy
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Hypergiant star studied

A European research team has published the results of a 30-year study of an extraordinary hypergiant star. They have found that the surface temperature of the super-luminous star HR 8752 increased by about ...

dateDec 10, 2012 in Astronomy
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