Astronomers operating the NASA Wide-field Infrared Survey Explorer (WISE) telescope say that a survey the observatory conducted before its mission ended has now revealed more than 200 blazars.
These structures can be best described as very compact quasi-stellar radio sources (quasars). Their name is meant to expres... |
13 April 2012
02:59 GMT |
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Extremely bright quasars could degenerate into supermassive black holes over the course of billions of years, experts say after studying a pair of dark behemoths that exceed any other known black hole in terms of mass and size.
Quasars are the highly-active cores of distant active galactic nuclei, and they can be... |
10 December 2011
06:59 GMT |
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For the first time ever, astronomers confirm the discovery of water vapors around a quasar located about 12 billion light-years away. This means that the object existed when the Universe was just a fraction of its current age. Water has never been found around such an ancient object before.
A quasar – quasi-s... |
21 October 2011
03:24 GMT |
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A group of astronomers at the University of Copenhagen in Denmark Dark Cosmology Center, led by Darach Watson, proposes a new way of keeping tabs on cosmic distances. Their approach no longer relies on standard “cosmic candles” as reference points, but shifts on active galactic nuclei (AGN).
Standard c... |
26 September 2011
18:01 GMT |
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The radio galaxy closest to Earth, Centaurus A, may feature at least two supermassive black holes at its core, a team of researchers has determined. Active galaxies such as this one have been found to contain two or more such structures at their cores more often than not. In a study of seven such galaxies, four have ... |
6 January 2011
10:37 GMT |
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For many years, astrophysicists have been debating the role that supermassive black holes play in the galactic development process. Galactic temperatures are among the main factors dictating the evolution of this type of structures, and experts have recently found the perfect place to investigate the relation.The gal... |
10 December 2010
05:05 GMT |
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The collision of galaxies results in the emergence of super-massive black holes, researchers found recently. These black holes would be the most powerful sources of radiation in the universe, it seems. The fact that these giant black holes radiate large amounts of energy could explain why the centers of a tenth of a... |
21 June 2010
10:42 GMT |
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Scientists at the American space agency say that they were finally able to answer a decades-old astronomical question. For years, astrophysicists have been trying to explain why a small portion of all black holes – no more than 1 percent – appear to emit vast amounts of energy at certain times. The behavi... |
27 May 2010
04:21 GMT |
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Using the NASA Hubble Space Telescope, an international team of astronomers and astrophysicists looked at more than 500 galaxies, in a bid to identify which of them features nuclear rings. During the investigation, about 113 such formations were uncovered in 107 different host galaxies, and the new data were centrali... |
30 April 2010
06:37 GMT |
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Nothing can escape the gravitational pull of black holes, not even light; they draw in every bit of matter and energy passing beyond their event horizon. According to a new study, some of the heaviest black holes in the universe, weighing up to several billion solar masses and found in the cores of active galactic nu... |
5 June 2008
03:45 GMT |
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NASA's GLAST satellite, or the Gamma-ray Large Area Space Telescope, set to study the universe at its highest energies was scheduled for launch on June 3rd, between 11:45 a.m. and 1:40 p.m. EDT from the Launch Complex 17 at NASA's Cape Canaveral Air Force Station. GLAST will be carried into space with the h... |
26 May 2008
09:35 GMT |
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Quasars are basically massive black holes surrounded by large accretion disks of matter and can be mostly found in active galactic nuclei. As they swallow large quantities of matter, quasars may eject gas into the interstellar space, so that star formation processes are stopped and the galaxy housing it evolves passi... |
9 April 2008
03:37 GMT |
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