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Home / News / Tags / black hole
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Stories about: black hole |
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The distant active galaxy that astronomers refer to as 1H0707-495 is currently the home of a supermassive black hole, which was the object of a new scientific 'close-up' study. The paper, which was published in the May 28th issue of the scientific journal Nature, details astrophysicists' efforts of bet... |
28 May 2009
09:11 GMT |
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A US-European astronomy team has recently announced at the European Week of Astronomy and Space Science meeting that it has discovered water spewing out of a black hole, at the center of a galaxy located billions of light-years away. The radio wavelength emissions that were observed in 2007 with the 100-meter German ... |
23 April 2009
06:43 GMT |
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Astrophysicists investigating the latest results provided by NASA's Chandra X-ray Observatory have discovered something truly amazing, and namely that a certain class of black holes has the ability to regulate its own growth, by simply shutting down or reducing the amount of high-speed particles they usually emi... |
26 March 2009
06:19 GMT |
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These days, almost all ground- and orbit-based telescopes are aimed at only one point in the sky, namely the Centaurus A galaxy, situated in the southern constellation of Centaurus, some 13 million light-years away from Earth. Currently, the supermassive black hole that lies at the center of that galaxy is undergoing... |
30 January 2009
03:41 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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Water droplets are pretty common in everyday life, so not many people give them a thought beyond that of wiping them off their hands or, at best, that of using them as a model for an artistic photography. But the fluid mechanics has a lot of interesting things to show and to teach us. This is why scientists still spe... |
11 December 2008
10:10 GMT |
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It's impossible to observe black holes directly with today's technology, especially since they're, well, black, and no light escapes so that their shape and existence can be detected. But scientists are pretty sure that almost (if not all) galaxies hold one such mysterious object at their core. This is... |
11 December 2008
05:36 GMT |
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Astronomy has gone a long way since the telescope was invented, and this device allows today's scientists to detect and deduce the presence of large planets outside our solar system. Still, the limited technology we have restrains the possibilities of finding smaller, Earth-like planets which may actually be mor... |
4 December 2008
10:45 GMT |
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Voorwerp means “object” in Dutch. This is the generic definition received by a peculiar phenomenon spotted a while ago by a Dutch school teacher, Hanny van Arkel, while she was combing through hundreds of photos as a volunteer for the Galaxy Zoo project. For more than a year now, scientists have been tryi... |
26 November 2008
07:21 GMT |
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Supermassive black holes, with a mass approximately a billion times that of our Sun, have been thought to reside at the very heart of the biggest galaxies, including our own. A recent computer simulation, corroborated with data obtained from the Chandra X-Ray Observatory, indicated that one of these black holes gener... |
24 November 2008
10:47 GMT |
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The material surrounding and circling the black hole of the Milky Way, called Sagittarius A*, emits flares of radiation. Two Chilean telescopes have managed to spot the event simultaneously for the first time. This allows for a better understanding of the phenomena going on in that place, otherwise unobservable due t... |
19 November 2008
09:25 GMT |
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Black holes are definitely the most fascinating aspect in the vastness of space, even if we don't know an awful lot about them. Actually, we don't even know whether they really exist or not yet, but theory says they should exist; otherwise, some things that are known to happen would be even weirder. But out... |
1 November 2008
06:31 GMT |
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Worldwide-famed astrophysicist Stephen Hawking, aged 66, one of the most brilliant contemporary minds, will retire from his prominent position of Lucasian Professor of Mathematics at Cambridge University next year. The policy of the institution requires that its members step down the academic year they turn 67, which... |
25 October 2008
04:30 GMT |
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New observations performed by the Hawaii-based Submillimeter Array's eight antennas indicated that massive black holes had been common since the early ages of the universe. The recent discovery of the collision of two ancient galaxies brought new data on the behavior of black holes.As the artist's concept, ... |
17 October 2008
07:49 GMT |
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A recent study indicates that the top speed stars in our own galaxy may have been assimilated after being ejected from a dwarf one that merged with the Milky Way. This kind of stars are dubbed “hypervelocity” stars, and were mostly believed to be originating from our galaxy's core, from where th... |
15 October 2008
03:31 GMT |
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According to the latest findings, though black holes attract everything to their core, including light and radiation, they have an upper limit as far as their maximum mass goes. Yale astronomy and physics professor Priyamvada Natarajan believes that the largest black hole can't be more than 10 billion times the ... |
30 September 2008
10:41 GMT |
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Barred galaxies, having two arms trailing each other on either side of the galactic center, might have evolved in this particular shape with the passing of time, say astronomers who discovered that, compared to the first half of the universe's past, currently there are three times more galaxies that have bars. M... |
30 July 2008
02:52 GMT |
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SN 2008D, a supernova explosion detected by NASA's Swift X-ray Space Telescope inside the galaxy NGC 2770 on January 9, 2009, might have actually been triggered by the gravitational collapse of a massive star into a black hole, say researchers from the Max Planck Institute for Astrophysics, who claim that the ev... |
25 July 2008
06:51 GMT |
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The worst place where a star could grow is in the vicinity of a supermassive black hole, as powerful gravitational fields exerted by the latter prevent the clouds of gas to condense into objects such as our Sun. However, astronomers have recently discovered that young stars do form near the center of our galaxy, insi... |
24 July 2008
04:15 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 weight of supermassive black holes found in the center of galaxies is usually estimated by measuring the effects of the huge gravitational fields on the objects located in the vicinity of the black holes in question. Now, a new and precise weighing method developed at the University of California with the help of... |
17 July 2008
11:25 GMT |
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Gamma-ray bursts are the brightest and most powerful type of electromagnetic radiation that can be emitted in the universe in the outcome of a violent stellar explosion, whose afterglow remains extremely bright up to several hours after the occurrence of the event that generated it. A new study found that afterglows ... |
9 July 2008
03:42 GMT |
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At first glance, black holes and qubits seem to be two completely different entities and indeed they are, although they seem to share a great deal of resemblances. For example, last year, Michael Duff from the Imperial College London first demonstrated a connection between the entropy of a black hole and the ways thr... |
4 July 2008
10:37 GMT |
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Black holes produce gravitational fields so powerful that they are able to shape space-time around them. However, what shape that particular volume of space surrounding the black hole might take under the influence of such an extreme gravitational field is unknown, as are the effects that might produce the powerful m... |
2 July 2008
05:28 GMT |
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The Large Hadron Collider is rapidly approaching completion and should become operational by the end of the year. It will become the biggest particle collider ever built, probably powerful enough to create even microscopic black holes. It has been suggested on a number of occasions, despite CERN's reassurance, t... |
1 July 2008
03:18 GMT |
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One of the most expected launches of the year was carried out yesterday at approximately 12:05 pm EDT from NASA's Launch Complex 17-B at the Cape Canaveral Air Force Station, with the help of a Delta II rocket. The newest high-energy gamma-ray space observatory GLAST was launched into space and inserted into Ear... |
12 June 2008
03:43 GMT |
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Supergiant high-mass X-ray binaries, HMXB for short, are stellar systems consisting of a supergiant star and a neutron star orbiting around it. HMXBs are relatively rare in the universe and are believed to be only a short phase in the life of binary star systems. At the time when ESA's gamma-ray space observator... |
11 June 2008
10:11 GMT |
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Investigations in the X-ray spectrum are critical for astronomers, especially in studying extremely violent interactions produced by black holes, neutron stars and dark energy. The problem with X-ray light is that it's hard to collect since most of the X-ray sources in the sky are very faint, not to mention that... |
10 June 2008
06:02 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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At the center of the Auriga constellation lies one of the weirdest star systems in the universe, Epsilon Aurigae, an F-type star about 389 million kilometers across that is being eclipsed every 27 years by an even larger disk of matter orbiting around it. That particular object could just as well become one of the gr... |
6 June 2008
10:54 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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In 2005 and 2007, NASA Spitzer Space Telescope detected two narrow infrared signatures near the magnetar dubbed SGR 1900+14, suggesting that the star was surrounded by a ring of matter that remained in its vicinity after the progenitor star went 'nova'. SGR 1900+14 is a neutron star with a magnetic field a ... |
29 May 2008
04:32 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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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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In the 1970s Stephen Hawking showed that singularities, and therefore black holes, can exist in our space-time continuum. He also revealed that although black holes radiate mass and energy in the surrounding medium through the event horizon, information falling into a black hole would be lost forever, meaning that ma... |
15 May 2008
04:38 GMT |
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Theory says that black holes are objects of extreme mass and density, having powerful gravitational fields able to warp space and time, and surrounded by a boundary called the event horizon, beyond which matter and energy cannot escape the gravitational pull and will ultimately fall in the singularity. In addition to... |
13 May 2008
02:52 GMT |
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The device will be developed and built by the Intel Corporation and the SGI, and will be installed at NASA Advanced Supercomputing facility at the Ames Research Center. It is expected to become operational by 2009, when it will have a computational power of one petaflops. Then, until 2012, the new supercomputer will ... |
12 May 2008
11:03 GMT |
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The vast majority of stars end their lives through supernova explosions while others, more massive, are thought unable to produce such explosions simply because they implode and collapse under their own weight only to produce a black hole. Since these particular types of stellar death don't generate brilliant em... |
10 May 2008
03:44 GMT |
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It has been theorized some time ago that supermassive black holes may be ejected from their galaxy during a galactic collision. However, until now such event remained unobserved. When two or more galaxies merge into a single one their supermassive black holes may also merge, albeit the energy released during such a p... |
30 April 2008
02:52 GMT |
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Supermassive black holes are mostly found in galactic nuclei, ejecting matter in the form of particle jets at relativistic speeds during the 'feeding' process. According to theory, these particle jets are accelerated to these speeds by tightly-twisted magnetic fields generated in the close proximity of the ... |
24 April 2008
02:58 GMT |
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Light echoes are generated when interstellar or intergalactic gas is ionized by electromagnetic emissions originating several light years away, and responds accordingly by releasing the surplus energy by emitting light. By observing such light echoes, astronomers can witness events that occurred several hundred of th... |
19 April 2008
04:04 GMT |
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The Theory of General Relativity predicts that objects of great mass - such as stars, neutron stars, black holes and so on - have the ability of severely warping the fabric of space-time due to their powerful gravitational pull. The prediction was first verified in 1919, when Arthur Eddington allegedly detected such ... |
17 April 2008
02:48 GMT |
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John Wheeler died on 13 April, aged 96. He was the first to coin the term 'black hole', helped develop the theory of nuclear fission and one of the great physicists to participate in the Manhattan project, the first program to create a working nuclear weapon during World War II. John Wheeler was born in Jac... |
16 April 2008
05:56 GMT |
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With the help of observations made with NASA, JAXA and ESA's X-ray satellites, astronomers revealed that the supermassive black hole at the center of our galaxy, dubbed Sagittarius A*, suffered a massive outburst some three centuries ago. Sagittarius A* is about 4 million times more massive than the Sun, however... |
16 April 2008
02:52 GMT |
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There are quite a few large laser interferometers in the world today, including the two LIGO detectors in the US, specially constructed to test the existence of gravitational waves, distortions in the fabric of space-time determined by gravitational interactions between very massive cosmic bodies, such as the merging... |
14 April 2008
04:00 GMT |
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Three weeks ago, the Swift satellite detected the brightest gamma-ray burst in the visible universe in a galaxy located more than 7 billion light years away from Earth. It is though that the supernova explosion could have been the result of the collapse of a massive star into a black hole, and that, during the explos... |
12 April 2008
03:47 GMT |
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Globular star clusters are believed to be amongst the oldest objects in the universe, some of them probably being more than 12 billion years old. Our galaxy, the Milky Way, is home to about 200 globular star clusters, amongst which the Omega Centauri star cluster, the biggest and brightest of all. Although it is loca... |
11 April 2008
03:31 GMT |
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Server downtime and maintenance are not the only factors that sometimes block users from reaching their favorite webpages. It's true that server and hosting technical problems are the main reasons the websites fail to load, but researchers have unveiled another mysterious possibility that prevents you from reach... |
9 April 2008
04:16 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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Weighing supermassive black holes located in the center of galactic nuclei is more like looking through a solid brick wall, since matter in quantities of billions of times the mass of the Sun may stand in the way. Nonetheless, we are capable today to approximate the masses of supermassive black holes just by observin... |
9 April 2008
02:51 GMT |
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