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Home > News > Tags > quasar
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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 announce the discovery of an extremely bright active galaxy in the distant Universe. The structure, which is believed to be a quasar, may very well be the most luminous object of its class to exist such a short time after the Big Bang.
According to the study team, the object may shed more l... |
30 June 2011
02:53 GMT |
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The discovery of a quasar in a distant galaxy acting like a magnifying lens has thrilled astronomers. They searched the Sloan Digital Sky Survey (SDSS) quasar spectra database, hoping to find a case of reversed quasar-galaxy gravitational lensing. The perfect candidate was quasar SDSS J0013+1523, at 1.6 billion light... |
16 July 2010
05:06 GMT |
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An international team of astronomers from Europe and the US have been able to infer a lot of data based on the observations of Einstein Cross made by ESO's Very Large Telescope (VLT). This cosmic event, which largely magnifies the image of a very distant object, allowed the experts to perform, for the first time... |
14 December 2008
07:01 GMT |
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It is believed that hydrogen was the most frequent element found in the early universe, not long after it formed as a result of the Big Bang explosion. But a new study surprised scientists by indicating that it might yet not be so. The research focused on the observation of very distant galaxies formed during the you... |
26 November 2008
08:50 GMT |
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A sample load of high-energy electrons collected from above Antarctica may provide hints of the existence of the mysterious dark matter or, as the theory goes, of an enigmatic celestial object, such as a pulsar or a microquasar that lurks in the astronomical vicinity of our planet's pole. After performing a seri... |
20 November 2008
03:02 GMT |
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It was long predicted that quasars may in fact be black holes found in the center of large discs of hot matter. However, it was never really proven through observations that this was in fact true. Confirmation now comes from a team of astronomers from the Max Planck Institute for Radio Astronomy in Bonn who used a li... |
24 July 2008
02:45 GMT |
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The general belief amongst astrophysicists is that the magnetic field of a galaxy evolves simultaneously with the galaxy, slowly building up in time. New observations of the distant universe on the other hand, appear to suggest that this is not quite true and that young galaxies also possess powerful magnetic fields ... |
17 July 2008
02:51 GMT |
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Quasi stellar objects, or quasars, are the most powerful celestial bodies in the universe, capable of emitting enough energy to be observable across the whole visible universe. The European VLBI Network of radio telescopes has now discovered what appears to be the most distant quasar ever detected. Observations were ... |
7 June 2008
03:45 GMT |
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The Einstein Cross or Q2237+030 is a gravitationally lensed quasar that, along with the lensing galaxy in front of it, creates a nearly perfect cross pattern, with the core of the galaxy in the middle flanked by four images of the quasar (see image). The lensed object is located at a distance of about 8 billion light... |
5 June 2008
08:25 GMT |
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It is widely believed that every galaxy in the universe hosts a supermassive black hole at its core, with a mass ranging between ten thousand and a few billion times that of the Sun. Marc Sigar from the University of Arkansas claims that with the help of images provided by the Hubble Space Telescope, he and his team ... |
3 June 2008
03:00 GMT |
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Supermassive black holes, weighing several billion times more than the Sun, are widely believed to have begun their lives as smaller black holes that fed on the large masses of gas surrounding them. Computer models however tell another story. Small black holes cannot feed and grow rapidly to super-size because there&... |
20 May 2008
03:32 GMT |
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With the help of the Very Large Telescope, ESO astronomers have recently obtained an ultraviolet signature of carbon monoxide molecules inside a well hidden galaxy located 11 billion light years away from Earth. The VLT used its UVES spectrograph for a period of 8 hours to study the galaxy, during which time it obtai... |
13 May 2008
03:42 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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Quasars are basically black holes surrounded by large accretion disks of matter spinning around them. As matter is being drawn to the central black hole, it heats up and starts emitting high amounts of radiation, while powerful magnetic fields eject part of the material back into the surrounding space before crossing... |
7 April 2008
09:40 GMT |
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The universe originated in a Big Bang event more than 13 billion years ago, no doubt about that. However, much of its previous history and complexity misses key elements, which are necessary in order to create an accurate theory of the universe's evolution. As space telescopes get better, they enable us to view ... |
11 January 2008
03:54 GMT |
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How massive could a black hole in the universe be? Well, according to astronomers, they can get pretty big. At the American Astronomical Society meeting which took place yesterday, astronomers proposed that most of the massive black holes in the universe could surpass 18 billion times the mass of the Sun! Previously... |
10 January 2008
04:00 GMT |
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The Milky Way, like many other spiral galaxies, is home to a colossal black hole smack in its center, which is though to be the object which keeps most of the galaxy from falling apart. But with billions of other stars, having masses over 5 times that of the Sun, it's natural to imagine that the universe, thus o... |
10 January 2008
03:07 GMT |
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We used to think that Quasi Stellar Objects or quasars are the most energetic structures in the Universe, but this doesn't seem to be the case with the Milky Way, and why would our galaxy be more special than the others? The quasar is a special type of black hole, which goes through a 'feeding' process... |
27 December 2007
04:08 GMT |
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Although the observable Universe is mostly void, despite the general belief most of that void is filled with either energy or matter, except for certain strange structures called textures which seem to be having none of the two. High or low energy elementary particles are emitted in all directions by galaxies, quasar... |
9 November 2007
02:49 GMT |
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NASA's Hubble space telescope has taken new images of an elliptical galaxy, about two billion light-years away from Earth, as part of a research project led by UC Riversides Gabriela Canalizo. The galaxy's center is dominated by a quasar. A super massive black hole sucks gas in, creating an accretion disk... |
27 October 2007
05:37 GMT |
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Discovered by NASA's Spitzer and Chandra space telescopes, the black holes are located in distant massive galaxies, representing a large fraction of the population predicted by researchers to exist all over the universe. It is generally believed that an extremely large number of black holes was created after the... |
26 October 2007
04:26 GMT |
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No, the world does not fit into your hands, but is smaller than people believed when they previously measured it. The discrepancy is minute, but the team of geodesists from the University of Bonn says it is significant. They have remeasured the size of the Earth, as part of a long lasting international cooperation pr... |
6 July 2007
06:11 GMT |
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c, G, π, all three are fundamental constants that rule the very existence of our universe. The first represents the speed of light, exactly 299,792,458 meters per second, the second is the gravitational constant, equal to 6.67300 10-11 m3 kg-1 s-2, and the third is pi, approximately equal to 3.14159, which is ... |
21 June 2007
09:45 GMT |
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A group of researchers came up with a new, and in the same time old, method of searching for gravitational waves, using a mathematical model that hadn't be used for some time, in the hope of studying and accurately identifying an exotic kind of these gravitational waves.The gravitational wave is a fluctuation i... |
19 June 2007
10:23 GMT |
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Black holes are space objects which have an immense gravitational field that cuts off a region of space from the rest of the universe, trapping all matter and radiation that enters that region. Black holes are thought to form in two ways, as a direct result of the gravitational collapse of a star, or by collisions b... |
9 June 2007
07:01 GMT |
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A team of astronomers discovered this year the first known triple quasar, a space oddity, since the statistical probability of the existence of such a quasar says it's an extremely rare association.Quasars are extremely bright and distant astronomical objects thought to be the active nuclei of young galaxies. M... |
28 May 2007
16:36 GMT |
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Pollution on Earth is a very real threat to all lifeforms and its negative effects on organisms are well known, so countermeasures will have to be taken, if we all want to survive on the Blue Planet as we did before.Did you known there is such thing as "intergalactic pollution"?Warm gas escaping from the clutches of... |
20 April 2007
08:43 GMT |
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Since their discovery, the X rays keep on surprising the scientists with new applications, both related to current life and to the astronomical research. These are the most powerful radiations, able to penetrate the matter and reveal us its intimacy.It started in 1895, when Wilhelm Roentgen was studying the recently ... |
12 March 2007
11:13 GMT |
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